转自:https://www.cnblogs.com/maybo/p/5182439.html
通过阅读MongoDB 3.2.1的官方文档中关于java 编程发现最新的文档并没有实现对对象到Document的映射,所以自己有了利用反射实现简单的关系映射.
1.定义抽象类:AbstractMongoSession
import java.util.List; import org.bson.Document; import org.bson.conversions.Bson; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoDatabase; /* * 创建一个会话实现对mongoDB的原子操作 * * @author:maybo * * @date:2016-2-1 */ public abstract class AbstractMongoSession { private MongoDatabase db; private Class<?> clazz; private MongoCollection<Document> collection; public MongoCollection<Document> getCollection() { return this.collection; } public Class<?> getClazz() { return clazz; } public void setDb(MongoDatabase db) { this.db = db; } public MongoDatabase getDb() { return db; } protected MongoCollection<Document> Collection(Class<?> clazz) { this.clazz = clazz; Table table = (Table) clazz.getAnnotation(Table.class); String col = null; if (null != table && null != table.name()) { col = table.name(); } else { col = clazz.getName(); } this.collection = db.getCollection(col); return this.collection; } /* * 保存 * * @param:实体 * * @return:void */ public abstract void save(Object obj); public abstract void saveMany(List<Object> obj); // 删除数据 public abstract long delete(Object obj) throws Exception; public abstract long delete(Bson bson) throws Exception; // 删除数据 public abstract long deleteMany(List<Object> objs); public abstract long deleteMany(Bson bson); // 修改数据 public abstract long upate(Bson bson, Object obj); public abstract long update(Object obj); public abstract long upateMany(Bson bson, Object obj); public abstract long upateMany(Bson bson, List<Object> objs); public abstract long upateMany(List<Object> objs); // 查询数据 public abstract Object find(Object obj); // 获取所有的数据 public abstract List<Object> finds(); // 条件查询数据 public abstract List<Object> query(Bson bson); public abstract Object queryOne(Bson bson); public abstract List<Object> query(Bson bson, Bson sort); public abstract Object queryOne(Bson bson, Bson sort); public abstract List<Object> query(Bson bson, Bson sort, int limit); public abstract List<Object> query(Bson bson, Bson sort, int limit, int skip); public abstract List<Object> query(Bson bson, Bson sort, Bson filter); public abstract Object queryOne(Bson bson, Bson sort, Bson Filter); public abstract long count(); public abstract long count(Bson bson); }
2. 实现类MongoSession
import java.lang.reflect.InvocationTargetException; import java.util.ArrayList; import java.util.List; import org.bson.Document; import org.bson.conversions.Bson; import com.mongodb.client.FindIterable; import com.mongodb.client.MongoCursor; import com.mongodb.client.MongoDatabase; import com.mongodb.client.model.Filters; import com.mongodb.client.result.DeleteResult; import com.mongodb.client.result.UpdateResult; public class MongoSession extends AbstractMongoSession { public MongoSession(Class<?> clazz, MongoDatabase db) { this.setDb(db); this.Collection(clazz); } /* * (non-Javadoc) * * @see AbstractMongoSession#save(java.lang.Object) */ @Override public void save(Object obj) { try { this.getCollection().insertOne(BsonUtil.toBson(obj)); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } } @Override public long delete(Object obj) throws Exception { try { DeleteResult result = this.getCollection().deleteOne( BsonUtil.toBson(obj)); long count = result.getDeletedCount(); return count; } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } return 0; } @Override public void saveMany(List<Object> obj) { try { this.getCollection().insertMany(BsonUtil.toBsons(obj)); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } } @Override public long delete(Bson bson) throws Exception { DeleteResult deleteResult = this.getCollection().deleteOne(bson); return deleteResult.getDeletedCount(); } @Override public long deleteMany(List<Object> objs) { List<Document> documents; int count = 0; try { documents = BsonUtil.toBsons(objs); for (int i = 0; null != documents && i < documents.size(); i++) { DeleteResult deleteResult = this.getCollection().deleteOne( documents.get(i)); count += deleteResult.getDeletedCount(); } return count; } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } return count; } @Override public long deleteMany(Bson bson) { DeleteResult deleteResult = this.getCollection().deleteMany(bson); return deleteResult.getDeletedCount(); } @Override public long upate(Bson bson, Object obj) { try { UpdateResult result = this.getCollection().updateOne(bson, new Document("$set", BsonUtil.toBson(obj))); return result.getMatchedCount(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } return 0; } @Override public long update(Object obj) { Document document; try { document = BsonUtil.toBson(obj); UpdateResult updateResult = this.getCollection().updateOne( Filters.eq("_id", document.get("_id")), new Document("$set", document)); return updateResult.getMatchedCount(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } return 0; } @Override public long upateMany(Bson bson, Object obj) { try { UpdateResult updateResult = this.getCollection().updateMany(bson, new Document("$set", BsonUtil.toBson(obj))); return updateResult.getMatchedCount(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } return 0; } @Override public long upateMany(Bson bson, List<Object> obj) { for (int i = 0; null != obj && i < obj.size(); i++) { try { UpdateResult result = this.getCollection().updateMany(bson, new Document("$set", BsonUtil.toBson(obj))); return result.getMatchedCount(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return 0; } @Override public long upateMany(List<Object> objs) { long count = 0; for (int i = 0; null != objs && i < objs.size(); i++) { try { UpdateResult result = this.getCollection().updateMany( Filters.eq("_id", BsonUtil.toBson(objs.get(i)).get("_id")), new Document("$set", BsonUtil.toBson(objs.get(i)))); count += result.getMatchedCount(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return count; } @Override public Object find(Object obj) { try { Document document = this.getCollection() .find(Filters.eq("_id", BsonUtil.toBson(obj).get("_id"))) .first(); return BsonUtil.toBean(document, this.getClazz()); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchFieldException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } @Override public List<Object> finds() { FindIterable<Document> doIterable = this.getCollection().find(); MongoCursor<Document> cursor = doIterable.iterator(); List<Object> objects = new ArrayList<Object>(); while (cursor.hasNext()) { Document document = cursor.next(); try { objects.add(BsonUtil.toBean(document, this.getClazz())); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return objects; } @Override public List<Object> query(Bson bson) { FindIterable<Document> doIterable = this.getCollection().find(bson); MongoCursor<Document> cursor = doIterable.iterator(); List<Object> objects = new ArrayList<Object>(); while (cursor.hasNext()) { Document document = cursor.next(); try { objects.add(BsonUtil.toBean(document, this.getClazz())); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return objects; } @Override public Object queryOne(Bson bson) { Document document = this.getCollection().find(bson).first(); try { return BsonUtil.toBean(document, this.getClazz()); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } @Override public List<Object> query(Bson bson, Bson sort) { FindIterable<Document> doIterable = this.getCollection().find(bson) .sort(sort); MongoCursor<Document> cursor = doIterable.iterator(); List<Object> objects = new ArrayList<Object>(); while (cursor.hasNext()) { Document document = cursor.next(); try { objects.add(BsonUtil.toBean(document, this.getClazz())); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return objects; } @Override public Object queryOne(Bson bson, Bson sort) { Document document = this.getCollection().find(bson).sort(sort).first(); try { return BsonUtil.toBean(document, this.getClazz()); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } @Override public List<Object> query(Bson bson, Bson sort, int limit) { FindIterable<Document> doIterable = this.getCollection().find(bson) .sort(sort); if (limit > 0) { doIterable = doIterable.limit(limit); } MongoCursor<Document> cursor = doIterable.iterator(); List<Object> objects = new ArrayList<Object>(); while (cursor.hasNext()) { Document document = cursor.next(); try { objects.add(BsonUtil.toBean(document, this.getClazz())); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return objects; } @Override public List<Object> query(Bson bson, Bson sort, int limit, int skip) { FindIterable<Document> doIterable = this.getCollection().find(bson) .sort(sort); if (limit > 0) { doIterable = doIterable.limit(limit); } if (skip > 0) { doIterable = doIterable.skip(skip); } MongoCursor<Document> cursor = doIterable.iterator(); List<Object> objects = new ArrayList<Object>(); while (cursor.hasNext()) { Document document = cursor.next(); try { objects.add(BsonUtil.toBean(document, this.getClazz())); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return objects; } @Override public List<Object> query(Bson bson, Bson sort, Bson filter) { FindIterable<Document> doIterable = this.getCollection().find(bson) .sort(sort).filter(filter); MongoCursor<Document> cursor = doIterable.iterator(); List<Object> objects = new ArrayList<Object>(); while (cursor.hasNext()) { Document document = cursor.next(); try { objects.add(BsonUtil.toBean(document, this.getClazz())); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return objects; } @Override public Object queryOne(Bson bson, Bson sort, Bson Filter) { Document document = this.getCollection().find(bson).sort(sort) .filter(Filter).first(); try { return BsonUtil.toBean(document, this.getClazz()); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } @Override public long count() { return this.getCollection().count(); } @Override public long count(Bson bson) { // TODO Auto-generated method stub return this.getCollection().count(bson); } }
3. 帮助类:实现Document到Object 以及Object到Document的转换.使用反射技术和注解.
import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.lang.reflect.ParameterizedType; import java.util.ArrayList; import java.util.List; import org.bson.Document; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoCursor; /* * 将mongo的文档转化为对象将对象转化为mongo文档 * @author:maybo * @data:2016-2-1 */ public class BsonUtil { public static <T> List<T> toBeans(List<Document> documents, Class<T> clazz) throws IllegalArgumentException, InstantiationException, IllegalAccessException, InvocationTargetException { List<T> list = new ArrayList<T>(); for (int i = 0; null != documents && i < documents.size(); i++) { list.add(toBean(documents.get(i), clazz)); } return list; } /* * 将Bson 转化为对象 * * @param:Bson文档 * * @param:类pojo * * @param:返回对象 */ public static <T> T toBean(Document document, Class<T> clazz) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException { T obj = clazz.newInstance();// 声明一个对象 Field[] fields = clazz.getDeclaredFields();// 获取所有属性 Method[] methods = clazz.getMethods();// 获取所有的方法 /* * 查找所有的属性,并通过属性名和数据库字段名通过相等映射 */ for (int i = 0; i < fields.length; i++) { String fieldName = fields[i].getName(); Column column = fields[i].getAnnotation(Column.class); Object bson = null; if (null != column && null != column.name()) { bson = document.get(column.name()); } else if ("id".equals(fieldName)) { bson = document.get("_id"); } else { bson = document.get(fieldName); } if (null == bson) { continue; } else if (bson instanceof Document) {// 如果字段是文档了递归调用 bson = toBean((Document) bson, fields[i].getType()); } else if (bson instanceof MongoCollection) {// 如果字段是文档集了调用colTOList方法 bson = colToList(bson, fields[i]); } for (int j = 0; j < methods.length; j++) {// 为对象赋值 String metdName = methods[j].getName(); if (equalFieldAndSet(fieldName, metdName)) { methods[j].invoke(obj, bson); break; } } } return obj; } public static List<Document> toBsons(List<Object> objs) throws IllegalArgumentException, SecurityException, IllegalAccessException, InvocationTargetException, NoSuchFieldException { List<Document> documents = new ArrayList<Document>(); for (int i = 0; null != objs && i < objs.size(); i++) { documents.add(toBson(objs.get(i))); } return documents; } /* * 将对象转化为Bson文档 * * @param:对象 * * @param:类型 * * @return:文档 */ public static Document toBson(Object obj) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException, SecurityException, NoSuchFieldException { if (null == obj) { return null; } Class<? extends Object> clazz = obj.getClass(); Document document = new Document(); Method[] methods = clazz.getDeclaredMethods(); Field[] fields = clazz.getDeclaredFields(); for (int i = 0; null != fields && i < fields.length; i++) { Column column = fields[i].getAnnotation(Column.class);// 获取列注解内容 NotColumn notColumn = fields[i].getAnnotation(NotColumn.class);// 获取否列 String key = null;// 对应的文档键值 if (null != column && null != column.name()) {// 存在列映射取值 key = column.name(); } else if (null != notColumn) {// 不是列的情况 continue; } else { key = fields[i].getName();// 默认情况通过属性名映射 if ("id".equals(key)) {// 替换id为_id key = "_id"; } } String fieldName = fields[i].getName(); /* * 获取对象属性值并映射到Document中 */ for (int j = 0; null != methods && j < methods.length; j++) { String methdName = methods[j].getName(); if (null != fieldName && equalFieldAndGet(fieldName, methdName)) { Object val = methods[j].invoke(obj);// 得到值 if (null == val) { continue; } if (isJavaClass(methods[j].getReturnType())) { if (methods[j].getReturnType().getName() .equals("java.util.List")) {// 列表处理 @SuppressWarnings("unchecked") List<Object> list = (List<Object>) val; List<Document> documents = new ArrayList<Document>(); for (Object obj1 : list) { documents.add(toBson(obj1)); } document.append(key, documents); } else {// 其它对象处理,基本类型 document.append(key, val); } } else {// 自定义类型 document.append(key, toBson(val)); } } } } return document; } /* * 是否是自定义类型】 * * false:是自定义 */ private static boolean isJavaClass(Class<?> clz) { return clz != null && clz.getClassLoader() == null; } /* * 将文档集转化为列表 * * @param:文档集 * * @param:属性类型 * * @return:返回列表 */ private static List<Object> colToList(Object bson, Field field) throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException { ParameterizedType pt = (ParameterizedType) field.getGenericType();// 获取列表的类型 List<Object> objs = new ArrayList<Object>(); @SuppressWarnings("unchecked") MongoCollection<Document> cols = (MongoCollection<Document>) bson; MongoCursor<Document> cursor = cols.find().iterator(); while (cursor.hasNext()) { Document child = cursor.next(); @SuppressWarnings("rawtypes") Class clz = (Class) pt.getActualTypeArguments()[0];// 获取元素类型 @SuppressWarnings("unchecked") Object obj = toBean(child, clz); System.out.println(child); objs.add(obj); } return objs; } /* * 比较setter方法和属性相等 */ private static boolean equalFieldAndSet(String field, String name) { if (name.toLowerCase().matches("set" + field.toLowerCase())) { return true; } else { return false; } } /* * 比较getter方法和属性相等 */ private static boolean equalFieldAndGet(String field, String name) { if (name.toLowerCase().matches("get" + field.toLowerCase())) { return true; } else { return false; } } }
4.用到的注解Column ,NotColumn,Table
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Column: import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target (ElementType.FIELD)
@Retention (RetentionPolicy.RUNTIME)
public @interface Column {
public String name();
public String text() default "这是一个属性映射" ;
} N otColumn: import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target (ElementType.FIELD)
@Retention (RetentionPolicy.RUNTIME)
public @interface NotColumn {
public String text() default "不是属性字段" ;
} Table: import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target (ElementType.TYPE)
@Retention (RetentionPolicy.RUNTIME)
public @interface Table {
public String name();
public String text() default "表格映射" ;
} |
5. MongoObject
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import java.util.ArrayList;
import java.util.List;
import com.mongodb.MongoClient;
import com.mongodb.MongoClientOptions;
import com.mongodb.ReadPreference;
import com.mongodb.ServerAddress;
import com.mongodb.WriteConcern;
public class MongoObject {
private List<String> hostPorts;
private int port= 27017 ;
private String host= "127.0.0.1" ;
private int connectionsPerHost= 5 ; // 每个主机的连接数
private int threadsAllowedToBlockForConnectionMultiplier= 30 ; // 线程队列数,它以上面connectionsPerHost值相乘的结果就是线程队列最大值。如果连接线程排满了队列就会抛出“Out
// // to get
// db”错误。
private long maxWaitTime= 5000 ; // 最大等待连接的线程阻塞时间
private long connectTimeout= 5000 ; // 连接超时的毫秒。0是默认和无限
private long socketTimeout= 5000 ; // socket超时。0是默认和无限
private boolean autoConnectRetry= false ; // 这个控制是否在一个连接时,系统会自动
public void setHostPorts(List<String> hostPorts) {
this .hostPorts = hostPorts;
}
public MongoObject() {
// TODO Auto-generated constructor stub
}
public int getPort() {
return port;
}
public void setPort( int port) {
this .port = port;
}
public String getHost() {
return host;
}
public void setHost(String host) {
this .host = host;
}
public int getConnectionsPerHost() {
return connectionsPerHost;
}
public void setConnectionsPerHost( int connectionsPerHost) {
this .connectionsPerHost = connectionsPerHost;
}
public int getThreadsAllowedToBlockForConnectionMultiplier() {
return threadsAllowedToBlockForConnectionMultiplier;
}
public void setThreadsAllowedToBlockForConnectionMultiplier(
int threadsAllowedToBlockForConnectionMultiplier) {
this .threadsAllowedToBlockForConnectionMultiplier = threadsAllowedToBlockForConnectionMultiplier;
}
public long getMaxWaitTime() {
return maxWaitTime;
}
public void setMaxWaitTime( long maxWaitTime) {
this .maxWaitTime = maxWaitTime;
}
public long getConnectTimeout() {
return connectTimeout;
}
public void setConnectTimeout( long connectTimeout) {
this .connectTimeout = connectTimeout;
}
public long getSocketTimeout() {
return socketTimeout;
}
public void setSocketTimeout( long socketTimeout) {
this .socketTimeout = socketTimeout;
}
public boolean isAutoConnectRetry() {
return autoConnectRetry;
}
public void setAutoConnectRetry( boolean autoConnectRetry) {
this .autoConnectRetry = autoConnectRetry;
}
public MongoClient run() {
if ( null != hostPorts) {
if ( null != host && port > 0 ) {
hostPorts.add(host + ":" + port);
}
} else {
hostPorts = new ArrayList<String>();
if ( null != host && port > 0 ) {
hostPorts.add(host + ":" + port);
} else {
return null ;
}
}
List<ServerAddress> addresses = new ArrayList<ServerAddress>();
for (String hostPort : hostPorts) {
String[] spits = hostPort.split( ":" );
ServerAddress address = new ServerAddress(spits[ 0 ],
Integer.valueOf(spits[ 1 ]));
addresses.add(address);
}
MongoClient client = new MongoClient(addresses, getConfOptions());
return client;
}
@SuppressWarnings ( "deprecation" )
private MongoClientOptions getConfOptions() {
return new MongoClientOptions.Builder()
.socketKeepAlive( true )
// 是否保持长链接
.connectTimeout(( int ) this .connectTimeout)
// 链接超时时间
.socketTimeout(( int ) this .socketTimeout)
// read数据超时时间
.readPreference(ReadPreference.primary())
// 最近优先策略
.connectionsPerHost( this .connectionsPerHost)
// 每个地址最大请求数
.maxWaitTime(( int ) this .maxWaitTime)
// 长链接的最大等待时间
.threadsAllowedToBlockForConnectionMultiplier(
this .threadsAllowedToBlockForConnectionMultiplier) // 一个socket最大的等待请求数
.writeConcern(WriteConcern.NORMAL).build();
}
} |
6.MongoDB用于生产数据库对象
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import com.mongodb.client.MongoDatabase;
public class MongoDB{
private String db;
private MongoObject client;
public void setClient(MongoObject client) {
this .client = client;
}
public void setDb(String db) {
this .db = db;
}
public MongoDB(MongoObject client,String db){
this .client=client;
this .db=db;
} public MongoDatabase excute(){
return client.run().getDatabase(db);
} } |
7.DaoImpl
import java.util.List; public class DaoImpl implements Dao{ private MongoTemplate template; private MongoSession session; private String className; public void setClassName(String className) { this.className = className; } public MongoSession getSession() { return session; } public DaoImpl(){} public DaoImpl(MongoTemplate template,String className){ this.template = template; this.className=className; try { this.session=template.session(Class.forName(className)); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public void setTemplate(MongoTemplate template) { this.template = template; try { this.session=template.session(Class.forName(className)); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } } @Override public void save(Object obj) { this.session.save(obj); } @Override public void delete(Object obj) { try { this.session.delete(obj); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } @Override public void update(Object obj) { this.session.update(obj); } @Override public Object find(Object obj) { // TODO Auto-generated method stub return this.session.find(obj); } @Override public List<Object> finds() { // TODO Auto-generated method stub return this.session.finds(); } @Override public long total() { // TODO Auto-generated method stub return this.session.count(); } @Override public List<Object> finds(int index, int offset) { // TODO Auto-generated method stub return this.session.query(null, null, offset, index); } }
8. Test
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public class MongoDBTest {
private static MongoTemplate template1;
private static MongoTemplate template2;
private static MongoTemplate template3;
private static Dao dao1;
private static Dao dao2;
private static Dao dao3;
static {
MongoObject mongoObject = new MongoObject();
mongoObject.setPort( 12345 );
MongoDB demo1 = new MongoDB(mongoObject, "demo1" );
MongoDB demo2 = new MongoDB(mongoObject, "demo2" );
MongoDB demo3 = new MongoDB(mongoObject, "demo3" );
template1 = new MongoTemplate(demo1);
template2 = new MongoTemplate(demo2);
template3 = new MongoTemplate(demo3);
dao1 = new DaoImpl(template1, "MidStu" );
dao2 = new DaoImpl(template2, "MidStu" );
dao3 = new DaoImpl(template3, "MidStu" );
}
@Test
public void save() {
MidStu midStu = new MidStu();
midStu.setHabit( "zuqiu" );
midStu.setId( "saflfgsddsf35" );
dao1.save(midStu);
MidStu midStuFind = new MidStu();
midStuFind.setId( "saflfgsddsf35" );
System.out.println(dao1.find(midStuFind).toString());
dao2.save(midStu);
System.out.println(dao2.find(midStuFind).toString());
dao3.save(midStu);
System.out.println(dao3.find(midStuFind).toString());
}
} |
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