Spring JdbcTemplate 查询方法中的RowMapper实现汇总_再回首_百度空间

来源：互联网发布：合工大网络教育编辑：程序博客网时间：2024/06/06 20:52

实现一、在内部建立内联类实现<SPANclass=hilite1>RowMapper</SPAN>接口
packagehysteria.contact.dao.impl;
importjava.sql.ResultSet;
importjava.sql.SQLException;
importjava.sql.Types;
importjava.util.List;
importorg.springframework.jdbc.core.JdbcTemplate;
importorg.springframework.jdbc.core.<SPANclass=hilite1>RowMapper</SPAN>;
importhysteria.contact.dao.ItemDAO;
importhysteria.contact.domain.Item;
publicclassItemDAOImplimplementsItemDAO {
privateJdbcTemplate jdbcTemplate;
publicvoidsetJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
publicItem insert(Item item) {
String sql ="INSERT INTO items(user_id,name,phone,email) VALUES(?,?,?,?)";
Object[] params =newObject[]{item.getUserId(),item.getName(),item.getPhone(),item.getEmail()};
int[] types =newint[]{Types.INTEGER,Types.VARCHAR,Types.CHAR,Types.VARCHAR};
jdbcTemplate.update(sql,params,types);
returnitem;
}
publicItem update(Item item) {
String sql ="UPDATE items SET name = ?, phone = ?, email = ? WHERE id = ?";
Object[] params =newObject[] {item.getName(),item.getPhone(),item.getEmail(),item.getId()};
int[] types =newint[] {Types.VARCHAR,Types.CHAR,Types.VARCHAR,Types.VARCHAR,Types.INTEGER};
jdbcTemplate.update(sql,params,types);
returnitem;
}
publicvoiddelete(Item item) {
String sql ="DELETE FROM items WHERE id = ?";
Object[] params =newObject[] {item.getId()};
int[] types =newint[]{Types.INTEGER};
jdbcTemplate.update(sql,params,types);
}
publicItem findById(intid) {
String sql ="SELECT * FROM items WHERE id = ?";
Object[] params =newObject[] {id};
int[] types =newint[] {Types.INTEGER};
List items = jdbcTemplate.query(sql,params,types,newItemMapper());
if(items.isEmpty()){
returnnull;
}
return(Item)items.get(0);
}
publicList<Item> findAll() {
String sql ="SELECT * FROM items";
returnjdbcTemplate.query(sql,newItemMapper());
}
publicList<Item> findAllByUser(intuser_id) {
String sql ="SELECT * FROM items WHERE user_id = ?";
Object[] params =newObject[]{user_id};
int[] types =newint[]{Types.INTEGER};
List items = jdbcTemplate.query(sql,params,types,newItemMapper());
returnitems;
}
protectedclassItemMapperimplements<SPANclass=hilite1>RowMapper</SPAN> {
publicObject mapRow(ResultSet rs,introwNum)throwsSQLException {
Item item =newItem();
item.setId(rs.getInt("id"));
item.setUserId(rs.getInt("user_id"));
item.setName(rs.getString("name"));
item.setPhone(rs.getString("phone"));
item.setEmail(rs.getString("email"));
returnitem;
}
}
}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

第二个案例

package com.flmusic.cu.dao.jdbc;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import org.springframework.jdbc.core.PreparedStatementCallback;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;

import com.flmusic.cu.compere.CompereInfoBean;
import com.flmusic.cu.dao.CommendCompereDAO;

public class CommendCompereDAOJdbcImpl extends JdbcDaoSupport implements CommendCompereDAO{
/**
* 新增推荐主持人状态：0--未审核;1--审核
* @param userId
*/
public void addCommendCompere(final Integer userId){

   StringBuffer sql = new StringBuffer(200);
   //新增推荐主持人
   sql.append("insert into u_commend_compere_info(I64UserID,status) values(?,0)");
   this.getJdbcTemplate().execute(sql.toString(),new PreparedStatementCallback(){
     public Object doInPreparedStatement(PreparedStatement ps)throws SQLException {
        ps.setInt(1, userId);
        ps.execute();
        return null;
     }
   });
   //更新推荐状态--已推荐(1)
   updateCommendFlag(userId,1);
}
/**
* 查询推荐主持人列表
* @return
*/
public List findCommendCompereList(Integer agentId){
   StringBuffer sql = new StringBuffer(200);
   sql.append("select uc.compereName,uc.ilevel,com.I64UserID,com.status,a.agentName ");
   sql.append(" from u_commend_compere_info com ,u_compere_info uc left join webcu.dbo.agent a on uc.agentId=a.agentId ");
   sql.append("where com.I64UserID = uc.I64UserID ");

   if (agentId != null){
    sql.append(" and uc.agentId=").append(agentId);
   }
   List<CompereInfoBean> list = this.getJdbcTemplate().query(sql.toString(), new RowMapper(){
    public Object mapRow(ResultSet rs,int index) throws SQLException{
     CompereInfoBean bean = new CompereInfoBean();
     bean.setUserId(rs.getInt("I64UserID"));
     bean.setCompereName(rs.getString("compereName"));
     bean.setLevel(rs.getInt("ilevel"));
     bean.setCommendStatus(rs.getInt("status"));
     bean.setAgentName(rs.getString("agentName"));
     return bean;
    }
   });
   return list;
}
/**
* 更新推荐状态
* @param userId
* @param flag
*/
private void updateCommendFlag(final Integer userId,final int flag){
   //更新主持人的是否推荐状态
   StringBuffer sql = new StringBuffer(200);
   sql.append("update u_compere_info set commendFlag=? where I64UserID=?");
   this.getJdbcTemplate().execute(sql.toString(),new PreparedStatementCallback(){
     public Object doInPreparedStatement(PreparedStatement ps)throws SQLException {
        ps.setInt(1, flag);
        ps.setInt(2, userId);
        ps.execute();
        return null;
     }
   });
}

/**
* 根据室主Id查询主持人对象列表
*
*
*/
public List findCommendCompereListByHostId(Integer hostId) {
   // TODO Auto-generated method stub
   StringBuffer sql = new StringBuffer(200);
   sql.append("select a.I64UserID,a.compereName,a.iLevel from flMusicUserDB.dbo.u_compere_info a ");
   sql.append(" where a.compereNumber in (select compereNumber from RoomDB.dbo.Host_Compere_Mapping where hostNumber="+hostId+") ");

   List<CompereInfoBean> list = this.getJdbcTemplate().query(sql.toString(), new RowMapper(){
    public Object mapRow(ResultSet rs,int index) throws SQLException{
     CompereInfoBean bean = new CompereInfoBean();
     bean.setUserId(rs.getInt("I64UserID"));
     bean.setCompereName(rs.getString("compereName"));
     bean.setLevel(rs.getInt("ilevel"));
     return bean;
    }
   });
   return list;
}}