注意,以下代码随手写的,只测试了一小部份:
Service类要通用,本身就有点难.这一层跟business密切相关. 不过在数据库时代,什么business都少不了几个数据库的操作,那就先把这几个操作放到base的Service中来.当然,因为通用,为了让service知道你操作什么域,也少不了要指定一下,所以增加了个initBaseService(Class service)方法.如果一个service中有多个表要操少,就不断增加initXXXXXService(Class service)方法.建议service做成粗粒度的.就是应该包含多个功能相近的表的DAO操作.
具体开发软件时,少不得扩充这个Service类,在这里如果用"适配器"设计模试来做,效果可能要好.
| java代码:
|
|
package common.spring.service;
import java.util.List;
import java.util.Iterator;
import common.spring.dao.BaseDAOImpl;
import common.spring.dao.IBaseDAO;
import net.sf.hibernate.HibernateException;
/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2004</p>
* <p>Company: </p>
* @author 段洪杰
* @version 1.0
*/
public class BaseServiceSpringImpl implements IBaseService {
private IBaseDAO baseDAO;
public BaseServiceSpringImpl() {
super();
}
/**
* 增加信息 object
* @param object Object
*/
public void setObject(Object object) throws BaseServiceException {
try {
baseDAO.setObject(object);
} catch (Exception ex) {
throw new BaseServiceException("存object信息时出错! " + ex.toString());
}
}
/**
* 删除信息 object
* @param id String
*/
public void removeObjectById(String id) throws BaseServiceException {
try {
Object object = baseDAO.getObjectById(id);
baseDAO.removeObject(object);
} catch (Exception ex) {
throw new BaseServiceException("删除object时出错! " + ex.toString());
}
}
/**
* 取出信息 object
* @param id String
*/
public Object getObjectById(String id) throws BaseServiceException {
Object object=null;
try {
object = baseDAO.getObjectById(id);
} catch (Exception ex) {
throw new BaseServiceException("根据ID取出信息object时出错! " + ex.toString());
}
return object;
}
/**
* 修改信息 object
* @param object Object
*/
public void modifyObject(Object object) throws BaseServiceException {
try {
baseDAO.modifyObject(object);
} catch (Exception ex) {
throw new BaseServiceException("修改信息object时出错! " + ex.toString());
}
}
/**
* 取所有信息集合
* @return Iterator
* @param position int, length int
*/
public Iterator getObjects(int position, int length) throws BaseServiceException {
Iterator objects = null;
try {
objects = baseDAO.getObjects(position, length);
} catch (Exception ex) {
throw new BaseServiceException("取所有信息集合时出错! " + ex.toString());
}
return objects;
}
/**
* 取记录集合总数
* @return int
*/
public int getObjectsCount() throws
BaseServiceException {
int count = 0;
try {
count = baseDAO.getObjectsCount();
} catch (Exception ex) {
throw new BaseServiceException(" 取指定版块记录集合总数时出错! " + ex.toString());
}
return count;
}
/**
* 取指定版块记录集合
* @return Iterator
* @param boardId String, position int, length int
*/
public Iterator getObjects(String boardId, int position, int length) throws
BaseServiceException {
Iterator objects = null;
try {
objects = baseDAO.getObjects(boardId, position, length);
} catch (Exception ex) {
throw new BaseServiceException("取特定所有信息集合时出错! " + ex.toString());
}
return objects;
}
/**
* 取指定版块记录集合总数
* @return int
* @param String boardId
*/
public int getObjectsCountByBoard(String boardId) throws
BaseServiceException {
int count = 0;
try {
count = baseDAO.getObjectsCountByBoard(boardId);
} catch (Exception ex) {
throw new BaseServiceException(" 取指定版块记录集合总数时出错! " + ex.toString());
}
return count;
}
/**
*
* @return IBaseDAO
*/
public IBaseDAO getBaseDAO() {
return baseDAO;
}
/**
*
* @param boardTreeDAO IInfoTreeDAO
*/
public void setBaseDAO(IBaseDAO baseDAO) {
this.baseDAO = baseDAO;
}
/**
* 设置一个特点的service域
* @param service Class
*/
public void initBaseService(Class service){
baseDAO.init(service);
}
}
|
测试文件
| java代码:
|
|
package common.spring.service;
import junit.framework.*;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import oa.pojo.*;
/**
* <p>Title: OA1.0</p>
*
* <p>Description: </p>
*
* <p>Copyright: Copyright (c) 2004</p>
*
* <p>Company: </p>
*
* @author 段洪杰
* @version 1.0
*/
public class TestBaseService extends TestCase {
private IBaseService baseService = null;
private ApplicationContext ac;
protected void setUp() throws Exception {
super.setUp();
ac = new FileSystemXmlApplicationContext("F:/jbproject/oa_1_0/web/WEB-INF/applicationContext-hibernate.xml");
baseService =(IBaseService) ac.getBean("baseService");
}
protected void tearDown() throws Exception {
super.tearDown();
}
/**
* 录入测试
* @throws Exception
*/
/*
public void testSetObject() throws Exception {
Cart c=new Cart();
c.setTitle("input service1111");
baseService.setObject(c);
// assertEquals("return value", expectedReturn, actualReturn);
}*/
/**
* 查询总记录数测试
* @throws Exception
*/
public void testgetObjectCount() throws Exception {
Cart c=new Cart();
baseService.initBaseService(c.getClass());
int count =baseService.getObjectsCount();
assertEquals("return value", "22", count+"");
User u=new User();
baseService.initBaseService(u.getClass());
int count1 =baseService.getObjectsCount();
assertEquals("return value", "13", count1+"");
}
}
|
|
时间: 2004-10-22 12:47:26 标题: [原创]Hibernate_Spring中通用的Service类
