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发表时间：2010-09-20
最后修改：2010-09-20
三、Service层 Service 主要是处理业务逻辑层的数据，传递给dao层，进行持久化，或者按条件查询。我们还是采用dao的设计思路，写一个抽象的manager层，其还有的代码如下：
package com.jxs.sys.core.base.service;
import java.util.LinkedHashMap;
import java.util.List;
import com.jxs.sys.core.base.model.Model;
import com.jxs.sys.core.base.model.ModelSet;
public abstract interface Manager<T extends Model> {
/**
* 增加一个对象
*
* @param modelT
*/
public abstract void add(T modelT);
/**
* 删除一个对象
*/
public abstract List<String> delete(T modelT);
/**
* 删除一组对象
*
* @param modelTId
* 删除对象的集合
* @return 返回删除后出发的消息，
*/
public abstract List<String> delete(Integer[] modelTId);
/**
* 修改一个对象
*
* @param modelT
*/
public abstract void modify(T modelT);
/**
* 查询一个对象
*
* @param modelTId
* model.id
* @return 对象model
*/
public abstract T query(Integer modelTId);
/**
* 查询所有的对象集合
*
* @return
*/
public abstract ModelSet<T> queryAll();
/**
* 分页查询
*
* @param firstindex
* 首页
* @param maxresult
* 数量
* @return
*/
public abstract ModelSet<T> queryAll(int firstindex, int maxresult);
/**
*
* @param firstindex
* @param maxresult
* @param orderby
* 排序
* @return
*/
public abstract ModelSet<T> queryAll(int firstindex, int maxresult, LinkedHashMap<String, String> orderby);
/**
*
* @param firstindex
* @param maxresult
* @param wherejpql JPQL语句
* @param queryParams 参数
* @param orderby
* @return
*/
public abstract ModelSet<T> queryAll(int firstindex, int maxresult, String wherejpql, Object[] queryParams, LinkedHashMap<String, String> orderby);
/**
* compass检索
*
* @param queryString
* @return
*/
public abstract List<T> search(String queryString);
/**
* compass分页检索
*
* @param firstindex
* @param maxresult
* @return
*/
public abstract ModelSet<T> getSearchResult(int firstindex, int maxresult);
/**
* DisPlayTag 导出
*
* @param firstindex
* @param maxresult
* @return
*/
public abstract List<T> getSearchResultForExport(int firstindex, int maxresult);
}
Service 层manager的支持怎么写呢？ 我们还是先给出：
public abstract class ManagerSupport<T extends Model, D extends Dao<T>> implements Manager<T> {}
这样写有什么好处呢？ Service层需Dao层的支持，Dao是将Model同步到数据库中的，其支持的又是Manger接口，这样讲所有的对象都给绑定在了一起，既然需要同步数据，那么传递竟来的是Dao怎么个实例化呢？ 我们采用 javax.annotation.PostConstruct 这个annotation来实例化Dao，参见如下代码：
protected Dao<T> dao = null;
@PostConstruct
private void initDao() {
if (this.dao == null) {
String modelname = ReflectionUtils.getSuperClassGenricType(super.getClass()).getSimpleName();
StringBuffer daoname = new StringBuffer();
daoname.append(Character.toLowerCase(modelname.charAt(0))).append(modelname.substring(1)).append("Dao");
this.dao = ((Dao) SpringContextUtil.getBean(daoname.toString()));
}
}
之后我们因为实现了implements Manager<T>;所以我们只需要dao.xxx(xxx);方法就以了，参见如下代码： package com.jxs.sys.core.base.service; import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import net.sf.ehcache.Cache;
import net.sf.ehcache.Element;
import org.perf4j.aop.Profiled;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.jxs.sys.core.base.dao.Dao;
import com.jxs.sys.core.base.model.Model;
import com.jxs.sys.core.base.model.ModelSet;
import com.jxs.sys.core.base.utils.ReflectionUtils;
import com.jxs.sys.core.base.utils.SpringContextUtil;
import com.jxs.sys.core.base.utils.WebUtil;
import com.jxs.sys.core.security.model.User;
import com.jxs.sys.core.security.userholder.UserHolder;
public abstract class ManagerSupport<T extends Model, D extends Dao<T>> implements Manager<T> {
protected final Logger log = LoggerFactory.getLogger(super.getClass());
@Resource(name = "ehCache")
protected Cache cache;
@Resource(name = "springContextUtil")
protected SpringContextUtil springContextUtil;
protected Dao<T> dao = null;
@PostConstruct
private void initDao() {
if (this.dao == null) {
String modelname = ReflectionUtils.getSuperClassGenricType(super.getClass()).getSimpleName();
StringBuffer daoname = new StringBuffer();
daoname.append(Character.toLowerCase(modelname.charAt(0))).append(modelname.substring(1)).append("Dao");
this.dao = ((Dao) SpringContextUtil.getBean(daoname.toString()));
}
}
@Profiled(tag = "addInManager", message = "model = {$0}")
public void add(T model) {
this.dao.add(model);
}
public List<String> delete(T model) {
return delete(new Integer[] { model.getId() });
}
@Profiled(tag = "deleteInManager", message = "modelIds = {$0}")
public List<String> delete(Integer[] modelIds) {
List<String> messages = new ArrayList<String>();
for (Integer id : modelIds) {
try {
this.dao.delete(id);
} catch (Exception e) {
String message = "删除模型失败，模型类别为：" + this.dao.getModelClass() + " ,模型Id为: " + id;
this.log.info(message);
messages.add(message);
}
}
return messages;
}
@Profiled(tag = "modifyInManager", message = "model = {$0}")
public void modify(T model) {
this.dao.modify(model);
}
@Profiled(tag = "queryInManager", message = "modelId = {$0}")
public T query(Integer modelId) {
return (T) this.dao.query(modelId);
}
public ModelSet<T> queryAll() {
return queryAll(-1, -1);
}
public ModelSet<T> queryAll(int pageIndex, int pageSize) {
return queryAll(pageIndex, pageSize, null);
}
public ModelSet<T> queryAll(int pageIndex, int pageSize, LinkedHashMap<String, String> orderby) {
return queryAll(pageIndex, pageSize, null, null, orderby);
}
@Profiled(tag = "queryAllInManager", message = "pageIndex = {$0}, pageSize = {$1}, wherejpql = {$1}, queryParams = {$1}, orderby = {$1}")
public ModelSet<T> queryAll(int pageIndex, int pageSize, String wherejpql, Object[] queryParams, LinkedHashMap<String, String> orderby) {
int firstindex = (pageIndex - 1) * pageSize;
int maxresult = pageSize;
ModelSet models = this.dao.queryAll(firstindex, maxresult, wherejpql, queryParams, orderby);
return models;
}
@Profiled(tag = "searchInManager", message = "queryString = {$0}")
public List<T> search(String queryString) {
User user = UserHolder.getCurrentLoginUser();
user.setQueryString(queryString);
return this.dao.search(queryString);
}
@Profiled(tag = "getSearchResultForExportInManager", message = "pageIndex = {$0}, pageSize = {$1}")
public List<T> getSearchResultForExport(int pageIndex, int pageSize) {
ModelSet qr = getSearchResult(pageIndex, pageSize);
List constantModels = qr.getResultlist();
List models = new ArrayList(constantModels.size());
for (int i = 0; i < constantModels.size(); ++i) {
try {
models.add(((Model) constantModels.get(i)).clone());
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
}
removeHightlight(models);
return models;
}
@Profiled(tag = "getSearchResultInManager", message = "pageIndex = {$0}, pageSize = {$1}")
public ModelSet<T> getSearchResult(int pageIndex, int pageSize) {
User user = UserHolder.getCurrentLoginUser();
ModelSet qr = null;
Element element = null;
List models = new ArrayList();
element = this.cache.get(user.getCacheName() + "search" + this.dao.getModelClass().getName());
if (element == null) {
search(user.getQueryString());
element = this.cache.get(user.getCacheName() + "search" + this.dao.getModelClass().getName());
}
this.log.info("从缓存中获取搜索结果以供分页显示,页数为: " + pageIndex + ",页面大小为: " + pageSize);
this.log.info("缓存标识为: " + user.getCacheName() + "search" + this.dao.getModelClass().getName());
qr = (ModelSet) element.getValue();
int start = (pageIndex - 1) * pageSize;
int end = pageIndex * pageSize + pageSize;
if (end > qr.getResultlist().size()) {
end = qr.getResultlist().size();
}
for (int i = start; i < end; ++i) {
models.add((Model) qr.getResultlist().get(i));
}
long count = qr.getTotalrecord();
qr = new ModelSet();
qr.setResultlist(models);
qr.setTotalrecord(count);
return qr;
}
@Profiled(tag = "removeHightlightInManager", message = "models = {$0}")
private void removeHightlight(List<T> models) {
for (Model model : models) {
for (String searchProperty : model.getSearchProperties()) {
String[] multiLevelProperties = searchProperty.split(":");
String[] searchExpressions = multiLevelProperties[0].split("_");
String realProperty = searchExpressions[(searchExpressions.length - 1)];
String[] properties = (String[]) null;
if (multiLevelProperties.length > 1) {
properties = multiLevelProperties[1].split("_");
}
List<Model> objs = new ArrayList<Model>();
objs.add(model);
if (properties != null) {
for (String props : properties) {
List now = new ArrayList();
for (Model temp : objs) {
if (props.endsWith("$")) {
List temps = (List) ReflectionUtils.getFieldValue(temp, props.substring(0, props.length() - 1));
now.addAll(temps);
} else {
Model next = (Model) ReflectionUtils.getFieldValue(temp, props);
now.add(next);
}
}
objs = now;
}
}
String newValue = null;
try {
for (Model obj : objs) {
Object old = ReflectionUtils.getFieldValue(obj, realProperty);
if (old != null) {
String oldValue = old.toString();
newValue = WebUtil.removeHightlight(oldValue);
ReflectionUtils.setFieldValue(obj, realProperty, newValue);
}
}
} catch (Exception e) {
this.log.info("移除高亮，给对象【" + model.getMetaData() + "】设置属性【" + realProperty + "】失败,值为:【" + newValue + "】");
}
}
}
}
}
实例： UserManager
package com.jxs.sys.core.security.manager;
import com.jxs.sys.core.base.service.Manager;
import com.jxs.sys.core.security.model.User;
public interface UserManager extends Manager<User> {
public abstract User queryUserByName(String username);
}
UserManagerImpl：
package com.jxs.sys.core.security.manager.impl;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.jxs.sys.core.base.service.ManagerSupport;
import com.jxs.sys.core.security.dao.UserDao;
import com.jxs.sys.core.security.manager.UserManager;
import com.jxs.sys.core.security.model.User;
@Service("userManager")
@Transactional(readOnly = true)
public class UserManagerImpl extends ManagerSupport<User, UserDao> implements UserManager {
@Override
public User queryUserByName(String username) {
return ((UserDao) this.dao).queryUserByName(username);
}
}
期待action层
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发表时间：2010-09-21
只能鼓励一下，打个新手贴，自己学习还是不错的，不过还是尽量用已有的吧，造轮子的事情只能自娱自乐啊
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发表时间：2010-09-21
其实我想知道的是你的cache是怎么做的。。
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发表时间：2010-09-21
oh，看到了。。。
原来是那样做的，和我的一样！！ 不知道有没有更好的解决方案~~~ |
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