RowMapper处理查询结果集

查询返回单个结果（一个值或一个类），以下例子是返回password，返回一个类与该方法类似，使用内部匿名类方式

public boolean checkUser(User user)
{
String name =
user.getUsername();
String pass = user.getPassword();
String
sql="SELECT PASSWORD FROM USERS WHERE username=‘"+name+"‘";
Object
obj=jdbcTemplate.queryForObject(sql, new RowMapper(){
public Object
mapRow(java.sql.ResultSet res, int index)
throws SQLException
{
// TODO Auto-generated method stub
String
password=res.getString("password");
//System.out.println(password);
return password;
}

});
if(pass.equals(obj))
return true;
return false;
}

使用RowMapper查询多笔数据，使用继承接口方式

class UserRowMapper implements RowMapper
{ 
         public Object
mapRow(ResultSet rs,int index) throws
SQLException 
        
{ 
            
User u = new
User(); 
            
u.setId(rs.getString(”ID”)); 
            
u.setName(rs.getString(”Name”)); 
            
u.setPassword(rs.getString(”Password”)); 
            
return u; 
        
} 
     } 
public List select(String
where) 
   
{ 
        List
list;        
       
String sql = "select * from admin
"+where;        
       
list = jdbcTemplate.query(sql,new RowMapperResultReader(new
UserRowMapper())); 
        return
list; 
    }