Spring JdbcTemplate 查询方法中的RowMapper实现汇总

 package    hysteria.contact.dao.impl;

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

 import    org.springframework.jdbc.core.JdbcTemplate;
 import    org.springframework.jdbc.core.<SPAN  class   =hilite1>RowMapper</SPAN>;

 import    hysteria.contact.dao.ItemDAO;
 import    hysteria.contact.domain.Item;

 public     class    ItemDAOImpl  implements    ItemDAO {
 private    JdbcTemplate jdbcTemplate;

 public     void    setJdbcTemplate(JdbcTemplate jdbcTemplate) {
    this   .jdbcTemplate = jdbcTemplate;
 }

 public    Item insert(Item item) {
    String sql =  "INSERT INTO items(user_id,name,phone,email) VALUES(?,?,?,?)"  ;
    Object[] params =  new    Object[]{item.getUserId(),item.getName(),item.getPhone(),item.getEmail()};
    int   [] types =  new     int   []{Types.INTEGER,Types.VARCHAR,Types.CHAR,Types.VARCHAR};
    jdbcTemplate.update(sql,params,types);
    return    item;
 }

 public    Item update(Item item) {
    String sql =  "UPDATE items SET name = ?, phone = ?, email = ? WHERE id = ?"  ;
    Object[] params =  new    Object[] {item.getName(),item.getPhone(),item.getEmail(),item.getId()};
    int   [] types =  new     int   [] {Types.VARCHAR,Types.CHAR,Types.VARCHAR,Types.VARCHAR,Types.INTEGER};
    jdbcTemplate.update(sql,params,types);

    return    item;
 }

 public     void    delete(Item item) {
    String sql =  "DELETE FROM items WHERE id = ?"  ;
    Object[] params =  new    Object[] {item.getId()};
    int   [] types =  new     int   []{Types.INTEGER};
    jdbcTemplate.update(sql,params,types);
 }

 public    Item findById( int    id) {
    String sql =  "SELECT * FROM items WHERE id = ?"  ;
    Object[] params =  new    Object[] {id};
    int   [] types =  new     int   [] {Types.INTEGER};
    List items = jdbcTemplate.query(sql,params,types, new    ItemMapper());
    if   (items.isEmpty()){
     return     null   ;
    }
    return    (Item)items.get( 0  );
 }

 public    List<Item> findAll() {
    String sql =  "SELECT * FROM items"  ;
    return    jdbcTemplate.query(sql, new    ItemMapper());
 }


 public    List<Item> findAllByUser( int    user_id) {
    String sql =  "SELECT * FROM items WHERE user_id = ?"  ;
    Object[] params =  new    Object[]{user_id};
    int   [] types =  new     int   []{Types.INTEGER};
    List items = jdbcTemplate.query(sql,params,types, new    ItemMapper());
    return    items;
 }

 protected     class    ItemMapper  implements    <SPAN  class   =hilite1>RowMapper</SPAN> {

    public    Object mapRow(ResultSet rs,  int    rowNum)  throws    SQLException {
     Item item =  new    Item();
     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"  ));

     return    item;
    }

 }


 }

 

 

 

 

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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;
}}