1、引入spring-data-redis依赖的jar 包
<dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.7.1.RELEASE</version> <exclusions> <exclusion> <artifactId>spring-tx</artifactId> <groupId>org.springframework</groupId> </exclusion> <exclusion> <artifactId>spring-context-support</artifactId> <groupId>org.springframework</groupId> </exclusion> <exclusion> <artifactId>spring-core</artifactId> <groupId>org.springframework</groupId> </exclusion> <exclusion> <artifactId>spring-aop</artifactId> <groupId>org.springframework</groupId> </exclusion> <exclusion> <artifactId>spring-context</artifactId> <groupId>org.springframework</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.8.1</version> </dependency>
2、添加缓存注解
package com.huatech.common.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* 添加缓存
* @author lh
*
*/
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface Cacheable {
/**
* 缓存key
* @return
*/
public String key() default "";
/**
* 缓存时效,默认无限期
* @return
*/
public long expire() default 0L;
}
package com.huatech.common.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* 缓存清除
* @author lh
* @version 3.0
* @since 2016-8-28
*
*/
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface CacheEvict {
/**
* 缓存key数组
* @return
*/
String[] keys() default "";
/**
* 操作之间的缓存时间（秒）
* @author FangJun
* @date 2016年9月9日
* @return 默认0，不做限制
*/
long interval() default 0;
}
3、添加缓存操作工具类
package com.huatech.common.util;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.Validate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@SuppressWarnings("rawtypes")
public class ReflectionUtils {
private static final String SETTER_PREFIX = "set";
private static final String GETTER_PREFIX = "get";
private static final String CGLIB_CLASS_SEPARATOR = "$$";
private static Logger logger = LoggerFactory.getLogger(ReflectionUtils.class);
public static Object invokeGetMethod(Class<?> claszz, Object o, String name) {
Object ret = null;
try {
Method method = claszz.getMethod("get" + StringUtil.firstCharUpperCase(name));
ret = method.invoke(o);
} catch (Exception e) {
logger.error(e.getMessage(),e);
}
return ret;
}
/**
* 调用Getter方法.
* 支持多级，如：对象名.对象名.方法
*/
public static Object invokeGetter(Object obj, String propertyName) {
Object object = obj;
for (String name : StringUtils.split(propertyName, ".")){
String getterMethodName = GETTER_PREFIX + StringUtils.capitalize(name);
object = invokeMethod(object, getterMethodName, new Class[] {}, new Object[] {});
}
return object;
}
/**
* 调用Setter方法, 仅匹配方法名。
* 支持多级，如：对象名.对象名.方法
*/
public static void invokeSetter(Object obj, String propertyName, Object value) {
Object object = obj;
String[] names = StringUtils.split(propertyName, ".");
for (int i=0; i<names.length; i++){
if(i<names.length-1){
String getterMethodName = GETTER_PREFIX + StringUtils.capitalize(names[i]);
object = invokeMethod(object, getterMethodName, new Class[] {}, new Object[] {});
}else{
String setterMethodName = SETTER_PREFIX + StringUtils.capitalize(names[i]);
invokeMethodByName(object, setterMethodName, new Object[] { value });
}
}
}
/**
* 调用Setter方法(赋值)
* @param claszz
* @param o
* @param name
* @param argType
* @param args
* @return
*/
public static Object invokeSetter(Class<?> claszz, Object o, String name, Class<?> argType, Object args) {
Object ret = null;
try {
// 非 常量 进行反射
if (!checkModifiers(claszz, name)) {
Method method = claszz.getMethod("set" + StringUtil.firstCharUpperCase(name), new Class[] { argType });
ret = method.invoke(o, new Object[] { args });
}
} catch (Exception e) {
logger.error("claszz:{},name:{},argType:{},args:{}",claszz,name,argType, args);
}
return ret;
}
/**
* 直接读取对象属性值, 无视private/protected修饰符, 不经过getter函数.
*/
public static Object getFieldValue(final Object obj, final String fieldName) {
Field field = getAccessibleField(obj, fieldName);
if (field == null) {
throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + obj + "]");
}
Object result = null;
try {
result = field.get(obj);
} catch (IllegalAccessException e) {
logger.error("不可能抛出的异常{}", e.getMessage());
}
return result;
}
/**
* 直接设置对象属性值, 无视private/protected修饰符, 不经过setter函数.
*/
public static void setFieldValue(final Object obj, final String fieldName, final Object value) {
Field field = getAccessibleField(obj, fieldName);
if (field == null) {
throw new IllegalArgumentException("Could not find field [" + fieldName + "] on target [" + obj + "]");
}
try {
field.set(obj, value);
} catch (IllegalAccessException e) {
logger.error("不可能抛出的异常:{}", e.getMessage());
}
}
/**
* 直接调用对象方法, 无视private/protected修饰符.
* 用于一次性调用的情况，否则应使用getAccessibleMethod()函数获得Method后反复调用.
* 同时匹配方法名+参数类型，
*/
public static Object invokeMethod(final Object obj, final String methodName, final Class<?>[] parameterTypes,
final Object[] args) {
Method method = getAccessibleMethod(obj, methodName, parameterTypes);
if (method == null) {
throw new IllegalArgumentException("Could not find method [" + methodName + "] on target [" + obj + "]");
}
try {
return method.invoke(obj, args);
} catch (Exception e) {
throw convertReflectionExceptionToUnchecked(e);
}
}
/**
* 直接调用对象方法, 无视private/protected修饰符，
* 用于一次性调用的情况，否则应使用getAccessibleMethodByName()函数获得Method后反复调用.
* 只匹配函数名，如果有多个同名函数调用第一个。
*/
public static Object invokeMethodByName(final Object obj, final String methodName, final Object[] args) {
Method method = getAccessibleMethodByName(obj, methodName);
if (method == null) {
throw new IllegalArgumentException("Could not find method [" + methodName + "] on target [" + obj + "]");
}
try {
return method.invoke(obj, args);
} catch (Exception e) {
throw convertReflectionExceptionToUnchecked(e);
}
}
/**
* 循环向上转型, 获取对象的DeclaredField, 并强制设置为可访问.
*
* 如向上转型到Object仍无法找到, 返回null.
*/
public static Field getAccessibleField(final Object obj, final String fieldName) {
Validate.notNull(obj, "object can't be null");
Validate.notBlank(fieldName, "fieldName can't be blank");
for (Class<?> superClass = obj.getClass(); superClass != Object.class; superClass = superClass.getSuperclass()) {
try {
Field field = superClass.getDeclaredField(fieldName);
makeAccessible(field);
return field;
} catch (NoSuchFieldException e) {//NOSONAR
// Field不在当前类定义,继续向上转型
continue;// new add
}
}
return null;
}
/**
* 循环向上转型, 获取对象的DeclaredMethod,并强制设置为可访问.
* 如向上转型到Object仍无法找到, 返回null.
* 匹配函数名+参数类型。
*
* 用于方法需要被多次调用的情况. 先使用本函数先取得Method,然后调用Method.invoke(Object obj, Object... args)
*/
public static Method getAccessibleMethod(final Object obj, final String methodName,
final Class<?>... parameterTypes) {
Validate.notNull(obj, "object can't be null");
Validate.notBlank(methodName, "methodName can't be blank");
for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass()) {
try {
Method method = searchType.getDeclaredMethod(methodName, parameterTypes);
makeAccessible(method);
return method;
} catch (NoSuchMethodException e) {
// Method不在当前类定义,继续向上转型
continue;// new add
}
}
return null;
}
/**
* 循环向上转型, 获取对象的DeclaredMethod,并强制设置为可访问.
* 如向上转型到Object仍无法找到, 返回null.
* 只匹配函数名。
*
* 用于方法需要被多次调用的情况. 先使用本函数先取得Method,然后调用Method.invoke(Object obj, Object... args)
*/
public static Method getAccessibleMethodByName(final Object obj, final String methodName) {
Validate.notNull(obj, "object can't be null");
Validate.notBlank(methodName, "methodName can't be blank");
for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass()) {
Method[] methods = searchType.getDeclaredMethods();
for (Method method : methods) {
if (method.getName().equals(methodName)) {
makeAccessible(method);
return method;
}
}
}
return null;
}
/**
* 改变private/protected的方法为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。
*/
public static void makeAccessible(Method method) {
if ((!Modifier.isPublic(method.getModifiers()) || !Modifier.isPublic(method.getDeclaringClass().getModifiers()))
&& !method.isAccessible()) {
method.setAccessible(true);
}
}
/**
* 改变private/protected的成员变量为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。
*/
public static void makeAccessible(Field field) {
if ((!Modifier.isPublic(field.getModifiers()) || !Modifier.isPublic(field.getDeclaringClass().getModifiers()) || Modifier
.isFinal(field.getModifiers())) && !field.isAccessible()) {
field.setAccessible(true);
}
}
/**
* 通过反射, 获得Class定义中声明的泛型参数的类型, 注意泛型必须定义在父类处
* 如无法找到, 返回Object.class.
* eg.
* public UserDao extends HibernateDao<User>
*
* @param clazz The class to introspect
* @return the first generic declaration, or Object.class if cannot be determined
*/
@SuppressWarnings("unchecked")
public static <T> Class<T> getClassGenricType(final Class clazz) {
return getClassGenricType(clazz, 0);
}
/**
* 通过反射, 获得Class定义中声明的父类的泛型参数的类型.
* 如无法找到, 返回Object.class.
*
* 如public UserDao extends HibernateDao<User,Long>
*
* @param clazz clazz The class to introspect
* @param index the Index of the generic ddeclaration,start from 0.
* @return the index generic declaration, or Object.class if cannot be determined
*/
public static Class getClassGenricType(final Class clazz, final int index) {
Type genType = clazz.getGenericSuperclass();
if (!(genType instanceof ParameterizedType)) {
logger.warn("{}'s superclass not ParameterizedType",clazz.getSimpleName());
return Object.class;
}
Type[] params = ((ParameterizedType) genType).getActualTypeArguments();
if (index >= params.length || index < 0) {
logger.warn("Index: {}, Size of {}'s Parameterized Type: {}",index,clazz.getSimpleName(), params.length);
return Object.class;
}
if (!(params[index] instanceof Class)) {
logger.warn(" {} not set the actual class on superclass generic parameter",clazz.getSimpleName());
return Object.class;
}
return (Class) params[index];
}
public static Class<?> getUserClass(Object instance) {
if(instance == null){
throw new RuntimeException("Instance must not be null");
}
Class clazz = instance.getClass();
if (clazz != null && clazz.getName().contains(CGLIB_CLASS_SEPARATOR)) {
Class<?> superClass = clazz.getSuperclass();
if (superClass != null && !Object.class.equals(superClass)) {
return superClass;
}
}
return clazz;
}
/**
* 取得类中某个Field的类型名称
* @param clazz
* @param fieldName
* @return
*/
public static String getFieldTypeName(final Class clazz, String fieldName) {
Field field = null;
Class tclazz = clazz;
do {
try {
field = tclazz.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
tclazz = clazz.getSuperclass();
} catch (SecurityException e) {
}
} while (tclazz != Object.class && field == null);
return (field == null)?null:field.getType().getSimpleName();
}
/**
* 将反射时的checked exception转换为unchecked exception.
*/
public static RuntimeException convertReflectionExceptionToUnchecked(Exception e) {
if (e instanceof IllegalAccessException || e instanceof IllegalArgumentException
|| e instanceof NoSuchMethodException) {
return new IllegalArgumentException(e);
} else if (e instanceof InvocationTargetException) {
return new RuntimeException(((InvocationTargetException) e).getTargetException());
} else if (e instanceof RuntimeException) {
return (RuntimeException) e;
}
return new RuntimeException("Unexpected Checked Exception.", e);
}
/**
* object 属性名称及属性值组装为String字符串。
* 组装规则：
* field.name1=field.value1&field.name2=field.value2 ...
* @param object
* @return
*/
public static String objToString(Object object) {
Class<?> clazz = object.getClass();
Field[] fss = new Field[0];
for (; clazz != Object.class; clazz = clazz.getSuperclass()) {
try {
Field[] fs = clazz.getDeclaredFields();
fss = ArrayUtils.addAll(fss, fs);
} catch (Exception e) {
// 这里异常不能抛出去。
// 如果这里的异常打印或者往外抛，就不会执行clazz = clazz.getSuperclass(),
// 最后就不会进入到父类中了
}
}
StringBuffer sb = new StringBuffer(50);
for (Field f : fss) {
// 反射对象中String类型，且不为常量的字段
if (String.class.equals(f.getType()) && !isConstant(f.getModifiers())) {
String fieldName = f.getName();
Object o = invokeGetMethod(f.getDeclaringClass(), object, fieldName);
String value = null==o?"":o.toString();
if (value == "") {
continue;
}
sb.append(fieldName + "=" + value + "&");
}
}
logger.info("请求参数："+sb.toString());
return sb.toString();
}
/**
* 是否为常量
* @param modifiers
* @return 常量返回true，非常量返回false
*/
private static boolean isConstant(int modifiers) {
// static 和 final修饰
if (Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers)) {
return true;
}
return false;
}
/**
* 校验参数类型
* 目前只校验是否为 常量
* @param claszz
* @param name
* @return 常量返回true，非常量返回false
*/
private static boolean checkModifiers(Class<?> claszz, String name) {
try {
Field field = claszz.getField(name);
if (isConstant(field.getModifiers())) {
return true;
}
} catch (NoSuchFieldException | SecurityException e) {
return false;
}
return false;
}
/**
* 取得属性
* @param clazz
* @return
*/
public static Map<String, Field> getClassField(Class<?> clazz) {
Field[] declaredFields = clazz.getDeclaredFields();
Map<String, Field> fieldMap = new HashMap<String, Field>();
Map<String, Field> superFieldMap = new HashMap<String, Field>();
for (Field field : declaredFields) {
fieldMap.put(field.getName(), field);
}
if (clazz.getSuperclass() != null) {
superFieldMap = getClassField(clazz.getSuperclass());
}
fieldMap.putAll(superFieldMap);
return fieldMap;
}
}
package com.huatech.common.util;
import org.apache.commons.lang3.StringUtils;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.asm.*;
import org.springframework.util.CollectionUtils;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 切面编程工具类
* @author lh
* @version 3.0
* @since 2016-8-26
*/
public class AopUtils {
private static final Logger LOGGER = LoggerFactory.getLogger(AopUtils.class);
private static final String DESC_DOUBLE = "D";
private static final String DESC_SHORT = "J";
private AopUtils() { }
/**
* <p>获取方法的参数名</p>
*
* @param m
* @return
*/
public static String[] getMethodParamNames(final Method m) {
final String[] paramNames = new String[m.getParameterTypes().length];
final String n = m.getDeclaringClass().getName();
final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
String className = m.getDeclaringClass().getSimpleName();
ClassReader cr = null;
InputStream resourceAsStream = null;
try {
resourceAsStream = Class.forName(n).getResourceAsStream(className + ".class");
cr = new ClassReader(resourceAsStream);
} catch (IOException | ClassNotFoundException e) {
LOGGER.warn(e.getMessage(), e);
} finally {
if (resourceAsStream != null) {
try {
resourceAsStream.close();
} catch (IOException e) {
LOGGER.warn(e.getMessage(), e);
}
}
}
if (cr != null) {
cr.accept(new ClassVisitor(Opcodes.ASM4, cw) {
@Override
public MethodVisitor visitMethod(final int access,
final String name, final String desc,
final String signature, final String[] exceptions) {
final Type[] args = Type.getArgumentTypes(desc);
// 方法名相同并且参数个数相同
if (!name.equals(m.getName())
|| !sameType(args, m.getParameterTypes())) {
return super.visitMethod(access, name, desc, signature,
exceptions);
}
MethodVisitor v = cv.visitMethod(access, name, desc, signature,
exceptions);
return new MethodVisitor(Opcodes.ASM4, v) {
int fixCount = 0;//步长修正计数器
@Override
public void visitLocalVariable(String name, String desc,
String signature, Label start, Label end, int index) {
int i = index - 1;
// 如果是静态方法，则第一就是参数
// 如果不是静态方法，则第一个是"this"，然后才是方法的参数
if (Modifier.isStatic(m.getModifiers())) {
i = index;
}
if (i > fixCount) {
i -= fixCount;
}
if(desc.equals(DESC_SHORT) || desc.equals(DESC_DOUBLE)){
fixCount++;
}
if (i >= 0 && i < paramNames.length) {
paramNames[i] = name;
}
super.visitLocalVariable(name, desc, signature, start,
end, index);
}
};
}
}, 0);
}
return paramNames;
}
/**
* <p>比较参数类型是否一致</p>
*
* @param types asm的类型({@link Type})
* @param clazzes java 类型({@link Class})
* @return
*/
private static boolean sameType(Type[] types, Class<?>[] clazzes) {
// 个数不同
if (types.length != clazzes.length) {
return false;
}
for (int i = 0; i < types.length; i++) {
if (!Type.getType(clazzes[i]).equals(types[i])) {
return false;
}
}
return true;
}
/**
* 取得切面调用的方法
* @param pjp
* @return
*/
public static Method getMethod(ProceedingJoinPoint pjp){
Signature sig = pjp.getSignature();
if (!(sig instanceof MethodSignature)) {
throw new IllegalArgumentException("该注解只能用于方法");
}
MethodSignature msig = (MethodSignature) sig;
Object target = pjp.getTarget();
Method currentMethod = null;
try {
currentMethod = target.getClass().getMethod(msig.getName(), msig.getParameterTypes());
} catch (NoSuchMethodException | SecurityException e) {
LOGGER.warn(e.getMessage(), e);
}
return currentMethod;
}
public static List<String> getMatcher(String regex, String source) {
List<String> list = new ArrayList<>();
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(source);
while (matcher.find()) {
list.add(matcher.group());
}
return list;
}
/**
* 取得注解参数
(?=exp) 匹配exp前面的位置
(?<=exp) 匹配exp后面的位置
(?!exp) 匹配后面跟的不是exp的位置
(?<!exp) 匹配前面不是exp的位置
* @param managers
* @return
*/
public static List<String> getAnnoParams(String source){
String regex = "(?<=\\{)(.+?)(?=\\})";
return getMatcher(regex, source);
}
/**
* 获取缓存的key值
*
* @param pjp
* @param key
* @return
*/
public static String getCacheKey(final ProceedingJoinPoint pjp, final String key) {
StringBuilder buf = new StringBuilder();
final Object[] args = pjp.getArgs();
if(StringUtils.isNotBlank(key)){
buf.append(key);
List<String> annoParamNames = AopUtils.getAnnoParams(key);
String[] methodParamNames = AopUtils.getMethodParamNames(AopUtils.getMethod(pjp));
if(!CollectionUtils.isEmpty(annoParamNames)){
for (String ap : annoParamNames) {
buf = replaceParam(buf, args, methodParamNames, ap);
}
}
}else{
buf.append(pjp.getSignature().getDeclaringTypeName()).append(":").append(pjp.getSignature().getName());
for (Object arg : args) {
buf.append(":").append(arg.toString());
}
}
return buf.toString();
}
/**
* 替换占位参数
* @param buf
* @param args
* @param methodParamNames
* @param ap
* @return
*/
private static StringBuilder replaceParam(StringBuilder buf, final Object[] args, String[] methodParamNames, String ap) {
StringBuilder builder = new StringBuilder(buf);
String paramValue = "";
for (int i = 0; i < methodParamNames.length; i++) {
if(ap.startsWith(methodParamNames[i])){
final Object arg = args[i];
if (ap.contains(".")) {
paramValue = String.valueOf(ReflectionUtils.invokeGetter(arg, ap.substring(ap.indexOf('.') + 1)));
} else {
paramValue = String.valueOf(arg);
}
break;
}
}
int start = builder.indexOf("{" + ap);
int end = start + ap.length() + 2;
builder =builder.replace(start, end, paramValue);
return builder;
}
}
package com.huatech.common.util;
public class StringUtil {
/**
* 首字母大写
*
* @param s
* @return
*/
public static String firstCharUpperCase(String s) {
StringBuffer sb = new StringBuffer(s.substring(0, 1).toUpperCase());
sb.append(s.substring(1, s.length()));
return sb.toString();
}
}
package com.huatech.common.util;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.redis.core.BoundHashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.huatech.common.support.SpringContextHolder;
/**
* 通用缓存工具类
* @author lh
* @version 3.0
* @since 2016-6-22
*
*/
public class CacheUtils {
private static final Logger LOGGER = LoggerFactory.getLogger(CacheUtils.class);
public static RedisTemplate<String, Object> redisTemplate = SpringContextHolder.getBean("redisTemplate");
public static StringRedisTemplate stringRedisTemplate = SpringContextHolder.getBean("stringRedisTemplate");
private static String redisKeyPrefix = PropertiesUtil.getValueByKey(CacheUtils.class.getResource("/").getPath() + "config/redis.properties", "redis.keyPrefix");
private CacheUtils() {
}
/**
* 删除缓存<br>
* 根据key精确匹配删除
*
* @param key
*/
public static void del(String... key) {
LOGGER.warn("delete cache, keys in ({})", merge(key));
for (String k : key) {
redisTemplate.delete(appendKeyPrefix(k));
}
}
/**
* 批量删除<br>
* （该操作会执行模糊查询，请尽量不要使用，以免影响性能或误删）
*
* @param pattern
*/
public static void batchDel(String... pattern) {
LOGGER.warn("batchDel cache, pattern in ({})", merge(pattern));
for (String kp : pattern) {
redisTemplate.delete(redisTemplate.keys(appendKeyPrefix(kp) + "*"));
}
}
/**
* 取得缓存（int型）
*
* @param key
* @return
*/
public static Integer getInt(String key) {
String value = stringRedisTemplate.boundValueOps(appendKeyPrefix(key)).get();
if (StringUtils.isNotBlank(value)) {
return Integer.valueOf(value);
}
return 0;
}
/**
* 取得缓存（long型）
*
* @param key
* @return
*/
public static Long getLong(String key) {
String value = stringRedisTemplate.boundValueOps(appendKeyPrefix(key)).get();
if (StringUtils.isNotBlank(value)) {
return Long.valueOf(value);
}
return 0l;
}
/**
* 取得缓存（字符串类型）
*
* @param key
* @return
*/
public static String getStr(String key) {
return stringRedisTemplate.boundValueOps(appendKeyPrefix(key)).get();
}
/**
* 取得缓存（字符串类型）
*
* @param key
* @return
*/
public static String getStr(String key, boolean retain) {
String value = stringRedisTemplate.boundValueOps(appendKeyPrefix(key)).get();
if (!retain) {
stringRedisTemplate.delete(appendKeyPrefix(key));
}
return value;
}
/**
* 获取缓存<br>
* 注：基本数据类型(Character除外)，请直接使用get(String key, Class<T> clazz)取值
*
* @param key
* @return
*/
public static Object getObj(String key) {
return redisTemplate.boundValueOps(appendKeyPrefix(key)).get();
}
/**
* 获取缓存<br>
* 注：java 8种基本类型的数据请直接使用get(String key, Class<T> clazz)取值
*
* @param key
* @param retain
* 是否保留
* @return
*/
public static Object getObj(String key, boolean retain) {
Object obj = redisTemplate.boundValueOps(appendKeyPrefix(key)).get();
if (!retain && obj != null) {
redisTemplate.delete(appendKeyPrefix(key));
}
return obj;
}
/**
* 获取缓存<br>
* 注：慎用java基本数据类型进行转换（可能会出现空值，转换报错）
*
* @param key
* key
* @param clazz
* 类型
* @return
*/
@SuppressWarnings("unchecked")
public static <T> T get(String key, Class<T> clazz) {
key = appendKeyPrefix(key);
if (clazz.equals(String.class)) {
return (T) stringRedisTemplate.boundValueOps(key).get();
} else if (clazz.equals(Integer.class) || clazz.equals(Long.class)) {
return (T) stringRedisTemplate.boundValueOps(key).get();
} else if (clazz.equals(Double.class) || clazz.equals(Float.class)) {
return (T) stringRedisTemplate.boundValueOps(key).get();
} else if (clazz.equals(Short.class) || clazz.equals(Boolean.class)) {
return (T) stringRedisTemplate.boundValueOps(key).get();
}
return (T) redisTemplate.boundValueOps(key).get();
}
/**
* 将value对象写入缓存
*
* @param key
* @param value
* @param seconds
* 失效时间(秒)
*/
public static void set(String key, Object value, long seconds) {
if (null == key || null == value) {
throw new RuntimeException("key or value must not null");
}
key = appendKeyPrefix(key);
if (value instanceof String) {
stringRedisTemplate.opsForValue().set(key, value.toString());
} else if (value instanceof Integer || value instanceof Long) {
stringRedisTemplate.opsForValue().set(key, value.toString());
} else if (value instanceof Double || value instanceof Float) {
stringRedisTemplate.opsForValue().set(key, value.toString());
} else if (value instanceof Short || value instanceof Boolean) {
stringRedisTemplate.opsForValue().set(key, value.toString());
} else {
redisTemplate.opsForValue().set(key, value);
}
if (seconds > 0) {
redisTemplate.expire(key, seconds, TimeUnit.SECONDS);
}
}
/**
* 更新key对象field的值
*
* @param key
* 缓存key
* @param field
* 缓存对象field
* @param value
* 缓存对象field值
*/
public static void setJsonField(String key, String field, String value) {
JSONObject obj = JSON.parseObject(stringRedisTemplate.boundValueOps(appendKeyPrefix(key)).get());
obj.put(field, value);
stringRedisTemplate.opsForValue().set(appendKeyPrefix(key), obj.toJSONString());
}
/**
* 递减操作
*
* @param key
* @param by
* @return
*/
public static double decr(String key, double by) {
return redisTemplate.opsForValue().increment(appendKeyPrefix(key), -by);
}
/**
* 递增操作
*
* @param key
* @param by
* @return
*/
public static double incr(String key, double by) {
return redisTemplate.opsForValue().increment(appendKeyPrefix(key), by);
}
/**
* 递减操作
*
* @param key
* @param by
* @return
*/
public static long decr(String key, long by) {
return redisTemplate.opsForValue().increment(appendKeyPrefix(key), -by);
}
/**
* 递增操作
*
* @param key
* @param by
* @return
*/
public static long incr(String key, long by) {
return redisTemplate.opsForValue().increment(appendKeyPrefix(key), by);
}
/**
* 获取double类型值
*
* @param key
* @return
*/
public static double getDouble(String key) {
String value = stringRedisTemplate.boundValueOps(appendKeyPrefix(key)).get();
if (StringUtils.isNotBlank(value)) {
return Double.valueOf(value);
}
return 0d;
}
/**
* 设置double类型值
*
* @param key
* @param value
* @param seconds
* 失效时间(秒)
*/
public static void setDouble(String key, double value, long seconds) {
stringRedisTemplate.opsForValue().set(appendKeyPrefix(key), String.valueOf(value));
if (seconds > 0) {
stringRedisTemplate.expire(appendKeyPrefix(key), seconds, TimeUnit.SECONDS);
}
}
/**
* 将map写入缓存
*
* @param key
* @param map
*/
public static <T> void setMap(String key, Map<String, T> map) {
redisTemplate.opsForHash().putAll(appendKeyPrefix(key), map);
}
/**
* 向key对应的map中添加缓存对象
*
* @param key
* @param map
*/
public static <T> void addMap(String key, Map<String, T> map) {
redisTemplate.opsForHash().putAll(appendKeyPrefix(key), map);
}
/**
* 向key对应的map中添加缓存对象
*
* @param key
* cache对象key
* @param field
* map对应的key
* @param value
* 值
*/
public static void addMap(String key, String field, String value) {
redisTemplate.opsForHash().put(appendKeyPrefix(key), field, value);
}
/**
* 向key对应的map中添加缓存对象
*
* @param key
* cache对象key
* @param field
* map对应的key
* @param obj
* 对象
*/
public static <T> void addMap(String key, String field, T obj) {
redisTemplate.opsForHash().put(appendKeyPrefix(key), field, obj);
}
/**
* 获取map缓存
*
* @param key
* @param clazz
* @return
*/
public static <T> Map<String, T> mget(String key, Class<T> clazz) {
BoundHashOperations<String, String, T> boundHashOperations = redisTemplate.boundHashOps(appendKeyPrefix(key));
return boundHashOperations.entries();
}
/**
* 获取map缓存中的某个对象
*
* @param key
* @param field
* @param clazz
* @return
*/
@SuppressWarnings("unchecked")
public static <T> T getMapField(String key, String field, Class<T> clazz) {
return (T) redisTemplate.boundHashOps(appendKeyPrefix(key)).get(field);
}
/**
* 删除map中的某个对象
*
* @author lh
* @date 2016年8月10日
* @param key
* map对应的key
* @param field
* map中该对象的key
*/
public static void delMapField(String key, String... field) {
redisTemplate.opsForHash().delete(appendKeyPrefix(key), field);
}
/**
* 为哈希表key中的域field的值
*
* @param key
* 键
* @param field
* map域
* @param value
* 增量值
* @return
*/
public static long hincr(String key, String field, long value) {
return redisTemplate.opsForHash().increment(appendKeyPrefix(key), field, value);
}
public static void hset(String key, String field, Object value){
redisTemplate.opsForHash().put(appendKeyPrefix(key), field, value);
}
public static Object hget(String key, String field){
return redisTemplate.boundHashOps(appendKeyPrefix(key)).get(field);
}
public static void hdel(String key, String...fields){
if (fields == null || fields.length == 0) {
redisTemplate.delete(appendKeyPrefix(key));
}else{
redisTemplate.opsForHash().delete(appendKeyPrefix(key), fields);
}
}
public static Long hlen(String key){
return redisTemplate.boundHashOps(appendKeyPrefix(key)).size();
}
public static <T> Set<T> hkeys(String key){
return (Set<T>)redisTemplate.boundHashOps(appendKeyPrefix(key)).keys();
}
public static <T> List<T> hvals(String key){
return (List<T>)redisTemplate.boundHashOps(appendKeyPrefix(key)).values();
}
/**
*
* @param key
* @param value
* @param seconds
* @return
*/
public static boolean setnx(String key, String value, long seconds) {
boolean flag = stringRedisTemplate.opsForValue().setIfAbsent(appendKeyPrefix(key), value);
if (seconds > 0) {
redisTemplate.expire(appendKeyPrefix(key), seconds, TimeUnit.SECONDS);
}
return flag;
}
/**
* 指定缓存的失效时间
*
* @author FangJun
* @date 2016年8月14日
* @param key
* 缓存KEY
* @param seconds
* 失效时间(秒)
*/
public static void expire(String key, long seconds) {
redisTemplate.expire(appendKeyPrefix(key), seconds, TimeUnit.SECONDS);
}
/**
* 指定缓存的失效时间
*
* @author FangJun
* @date 2016年8月14日
* @param key
* 缓存KEY
* @param seconds
* 失效时间(秒)
*/
public static void expire(String key, int seconds) {
redisTemplate.expire(appendKeyPrefix(key), seconds, TimeUnit.SECONDS);
}
/**
* 添加set
*
* @param key
* @param value
*/
public static void sadd(String key, String... value) {
redisTemplate.boundSetOps(appendKeyPrefix(key)).add(value);
}
/**
* 删除set集合中的对象
*
* @param key
* @param value
*/
public static void srem(String key, String... value) {
redisTemplate.boundSetOps(appendKeyPrefix(key)).remove(value);
}
/**
* 判断key对应的缓存是否存在
*
* @param key
* @return
*/
public static boolean exists(String key) {
return redisTemplate.hasKey(appendKeyPrefix(key));
}
/**
* 模糊查询keys
* @param pattern
* @return
*/
public static Set<String> keys(String pattern){
return redisTemplate.keys(appendKeyPrefix(pattern));
}
/**
* 合并数组为字符串
* @param strings
* @return
*/
private static String merge(String...strings){
if (strings == null || strings.length == 0) {
return null;
}
StringBuffer sb = new StringBuffer();
int len = strings.length;
for (int i = 0; i < len; i++) {
sb.append(strings[i]);
if(len != i+1){
sb.append(",");
}
}
return sb.toString();
}
private static String appendKeyPrefix(String key){
return redisKeyPrefix.concat(key);
}
}
4、增加AOP支持
package com.huatech.support.redis;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
import com.huatech.common.annotation.CacheEvict;
import com.huatech.common.annotation.Cacheable;
import com.huatech.common.util.AopUtils;
import com.huatech.common.util.CacheUtils;
/**
* 缓存操作切面
* 注意：一个支持缓存的方法，在对象内部被调用是不会触发缓存功能的。
* @author lh
*
*/
@Aspect
@Component
public class CacheAspect {
/**
* 缓存清除标识前缀
*/
public static final String KEY_PREFIX_CACHE_EVICT="cacheEvict:interval:";
public static final String REDIS_CACHE_SUPPORT = "1";
private static final Logger LOGGER = LoggerFactory.getLogger(CacheAspect.class);
@SuppressWarnings("rawtypes")
@Autowired
private RedisTemplate redisTemplate;
@Value("${redis.cacheSupport}")
private String redisCacheSupport;
@Value("${redis.keyPrefix}")
private String redisKeyPrefix;
/**
* 启用新的get方法，防止缓存被“击穿”
* <p>
* 击穿 ：缓存在某个时间点过期的时候，恰好在这个时间点对这个Key有大量的并发请求过来，
* 这些请求发现缓存过期一般都会从后端DB加载数据并回设到缓存，这个时候大并发的请求可能会瞬间把后端DB压垮。
* 如何解决：业界比较常用的做法，是使用mutex。
* 简单地来说，就是在缓存失效的时候（判断拿出来的值为空），不是立即去load db，而是先使用缓存工具的某些带成
* 功操作返回值的操作（比如Redis的SETNX或者Memcache的ADD）去set一个mutex key，当操作返回成功时，再进行
* load db的操作并回设缓存；否则，就重试整个get缓存的方法。
* </p>
* @param key
* @param pjp
* @param cache
* @return
* @throws Throwable
*/
private Object get(final String key, final ProceedingJoinPoint pjp, final Cacheable cache) throws Throwable {
@SuppressWarnings("unchecked")
ValueOperations<String, Object> valueOper = redisTemplate.opsForValue();
Object value = valueOper.get(key); // 从缓存获取数据
if (value == null) { // 代表缓存值过期
// 设置2min的超时，防止del操作失败的时候，下次缓存过期一直不能load db
String keynx = key.concat(":nx");
if (CacheUtils.setnx(keynx, "1", 5)) { // 代表设置成功
value = pjp.proceed();
if (cache.expire() <= 0) { // 如果没有设置过期时间,则无限期缓存
valueOper.set(key, value);
} else { // 否则设置缓存时间
valueOper.set(key, value, cache.expire(), TimeUnit.SECONDS);
}
CacheUtils.del(keynx);
return value;
} else { // 这个时候代表同时候的其他线程已经load db并回设到缓存了，这时候重试获取缓存值即可
Thread.sleep(10);
return get(key, pjp, cache); // 重试
}
} else {
return value;
}
}
/**
* 添加缓存
* @param pjp
* @param cache
* @return
* @throws Throwable
*/
@Around("@annotation(cache)")
public Object cacheable(final ProceedingJoinPoint pjp, Cacheable cache)throws Throwable {
if(REDIS_CACHE_SUPPORT.equals(redisCacheSupport)){
String key = redisKeyPrefix.concat(AopUtils.getCacheKey(pjp, cache.key()));
return get(key, pjp, cache);
}
return pjp.proceed();
}
@Around("@annotation(evict)")
public Object cacheEvict(final ProceedingJoinPoint pjp, CacheEvict evict)throws Throwable {
if(REDIS_CACHE_SUPPORT.equals(redisCacheSupport)){
Object value = pjp.proceed();
//清除keys对应的缓存数据
if (evict.keys() != null && evict.keys().length > 0) {
for (String keyname : evict.keys()) {
evictByKeyname(pjp, keyname,evict.interval());
}
}
return value;
}
return pjp.proceed();
}
@SuppressWarnings("unchecked")
private void evictByKeyname(final ProceedingJoinPoint pjp, final String keyname, long interval) {
final String key = redisKeyPrefix.concat(AopUtils.getCacheKey(pjp, keyname));
//操作间隔判断
if (interval != 0) {
final String intervalKey = KEY_PREFIX_CACHE_EVICT + key;
if (CacheUtils.incr(intervalKey, 1) > 1) {
return;
}
CacheUtils.expire(intervalKey, interval);
}
LOGGER.info("cacheEvict, key={}", key);
//使用redisTemplate操作缓存
if (keyname.equals(key)) {// 支持批量删除
Set<String> keys = redisTemplate.keys(key.concat("*"));
if (!CollectionUtils.isEmpty(keys)) {
redisTemplate.delete(keys);
}
} else {
redisTemplate.delete(key);
}
}
}
5、扩展spring-data-redis，简化配置
package com.huatech.support.redis;
import static org.springframework.util.Assert.isTrue;
import static org.springframework.util.Assert.notNull;
import static org.springframework.util.StringUtils.split;
import org.apache.commons.lang3.StringUtils;
import org.springframework.data.redis.connection.RedisClusterConfiguration;
import org.springframework.data.redis.connection.RedisNode;
/**
* <p>RedisCluster配置</p>
* <p>用于简化spring-data-redis配置</p>
* @author lh
* @version 3.0
* @since 2017-4-5
*
*/
public class RedisClusterConfig extends RedisClusterConfiguration{
public RedisClusterConfig(String nodes, Integer maxRedirects) {
super();
initNodes(nodes);
setMaxRedirects(maxRedirects);
}
private void initNodes(String nodes){
if(StringUtils.isBlank(nodes)){
throw new RuntimeException("nodes can not be empty!");
}
String[] hostAndPorts = nodes.split(",");
for (String hostAndPort : hostAndPorts) {
addClusterNode(readHostAndPortFromString(hostAndPort));
}
}
private RedisNode readHostAndPortFromString(String hostAndPort) {
String[] args = split(hostAndPort, ":");
notNull(args, "HostAndPort need to be seperated by ':'.");
isTrue(args.length == 2, "Host and Port String needs to specified as host:port");
return new RedisNode(args[0], Integer.valueOf(args[1]).intValue());
}
}
package com.huatech.support.redis;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
/**
* Jedis Single Connection factory
* @author lh
*
*/
public class RedisSingleConnFactory extends JedisConnectionFactory {
public RedisSingleConnFactory(String address,int timeout, String password, redis.clients.jedis.JedisPoolConfig poolConfig) {
String[] hostAndPorts = address.split(":");
setHostName(hostAndPorts[0]);
setPort(Integer.valueOf(hostAndPorts[1]));
setTimeout(timeout);
setPassword(password);
setPoolConfig(poolConfig);
}
public RedisSingleConnFactory(String address, String password, redis.clients.jedis.JedisPoolConfig poolConfig) {
String[] hostAndPorts = address.split(":");
setHostName(hostAndPorts[0]);
setPort(Integer.valueOf(hostAndPorts[1]));
setPassword(password);
setPoolConfig(poolConfig);
}
public RedisSingleConnFactory(String address, redis.clients.jedis.JedisPoolConfig poolConfig) {
String[] hostAndPorts = address.split(":");
setHostName(hostAndPorts[0]);
setPort(Integer.valueOf(hostAndPorts[1]));
setPoolConfig(poolConfig);
}
}
6、添加redis配置文件:redis.properties
#redis settings redis.cacheSupport=1 redis.keyPrefix=bds_ #redis pool settings redis.pool.maxTotal=60000 redis.pool.maxIdle=300 redis.pool.testOnBorrow=true #redis 单机配置 spring.redis.single.node=172.16.90.30:6379 spring.redis.single.timeout=8000 spring.redis.single.password=redis #redis 集群 spring.redis.cluster.maxRedirects=3 spring.redis.cluster.nodes=192.168.42.128:6379,192.168.42.128:6380,192.168.42.129:6379,192.168.42.129:6380,192.168.42.130:6379,192.168.42.130:6380
7、在applicationContext.xml文件中添加redis配置
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd" >
<description>Redis Configuration</description>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="order" value="1" />
<property name="ignoreUnresolvablePlaceholders" value="true" />
<property name="locations">
<list>
<value>classpath:/mybatis/jdbc.properties</value>
<value>classpath:/config/redis.properties</value>
</list>
</property>
</bean>
<aop:aspectj-autoproxy/>
<context:component-scan base-package="com.huatech.support"/>
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxIdle" value="${redis.pool.maxIdle}" /> <!-- 最大能够保持idel状态的对象数 -->
<property name="maxTotal" value="${redis.pool.maxTotal}" /> <!-- 最大分配的对象数 -->
<property name="testOnBorrow" value="${redis.pool.testOnBorrow}" /> <!-- 当调用borrow Object方法时，是否进行有效性检查 -->
</bean>
<!-- ======================单机配置 start ====================== -->
<!-- spring-data-redis 单机配置 -->
<bean id="jedisConnFactory" class="com.huatech.support.redis.RedisSingleConnFactory" >
<constructor-arg name="address" value="${spring.redis.single.node}"/>
<constructor-arg name="timeout" type="int" value="${spring.redis.single.timeout}" />
<constructor-arg name="password" value="${spring.redis.single.password}" />
<constructor-arg name="poolConfig" ref="jedisPoolConfig" />
</bean>
<!-- ======================单机配置 end ====================== -->
<!-- ======================cluster配置 start ====================== -->
<!-- spring-data-redis-cluster
<bean id="redisClusterConfiguration" class="com.huatech.support.redis.RedisClusterConfig" >
<constructor-arg value="${spring.redis.cluster.nodes}"/>
<constructor-arg value="${spring.redis.cluster.maxRedirects}" />
</bean>
<bean id="jedisConnFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" p:use-pool="true">
<constructor-arg ref="redisClusterConfiguration" />
<constructor-arg ref="jedisPoolConfig" />
</bean>
-->
<!-- ======================cluster配置 end ====================== -->
<bean id="stringRedisSerializer" class="org.springframework.data.redis.serializer.StringRedisSerializer" />
<bean id ="jdkSerializationRedisSerializer" class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
<bean id="stringRedisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate"
p:connectionFactory-ref="jedisConnFactory" />
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
p:connectionFactory-ref="jedisConnFactory"
p:keySerializer-ref="stringRedisSerializer"
p:hashKeySerializer-ref="stringRedisSerializer"
p:valueSerializer-ref="jdkSerializationRedisSerializer" />
</beans>
8、系统中添加缓存支持
@Override
@Cacheable(key="sc:code:{configCode}", expire = 0)
public SystemConfig findByConfigCode(String configCode) {
return systemConfigDao.findByConfigCode(configCode);
}
9、简单测试
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.rd.bds.core.common.util.CacheUtils;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:/spring/spring-config.xml", "classpath:/spring/spring-redis.xml" })
public class CacheUtilsTest {
@Test
public void testString()throws Exception{
String key = "email";
CacheUtils.set(key, "lh@erongdu.com", 20);
System.out.println(key+":"+CacheUtils.getStr(key));
Thread.sleep(1500);
System.out.println(key+":"+CacheUtils.getStr(key));
Thread.sleep(1500);
System.out.println(key+":"+CacheUtils.getStr(key));
}
}
import javax.annotation.Resource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.rd.bds.core.service.SystemConfigService;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:/spring/spring-config.xml", "classpath:/spring/spring-redis.xml" })
public class SystemConfigServiceImplTest {
@Resource
private SystemConfigService systemConfigService;
@Test
public void test()throws Exception{
systemConfigService.findByConfigCode("invest_award_limit");
Thread.sleep(100L);
systemConfigService.findByConfigCode("invest_award_limit");
Thread.sleep(100L);
systemConfigService.findByConfigCode("invest_award_limit");
}
}
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