Spring使用JdbcTemplate操作数据库---使用RowCallbackHander读数据篇

首先，假设如下SQL表中有数据username=test1,passwd=test1,address=test1

CREATE TABLE `login` (
  `username` varchar(10) default NULL,
  `passwd` varchar(10) default NULL,
  `address` varchar(10) default NULL
) ENGINE=InnoDB DEFAULT CHARSET=gb2312;

 

配置文件：

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" >
<beans>
 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
   <property name="driverClassName">
     <value>com.mysql.jdbc.Driver</value>
   </property>
   <property name="url">
     <value>jdbc:mysql://localhost:3306/javaee</value>
   </property>
   <property name="username">
     <value>root</value>
   </property>
   <property name="password">
     <value>1234</value>
   </property>
 </bean>
 <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
   <property name="dataSource">
     <ref local="dataSource"/>
   </property>
 </bean>

<bean id="personDAO" class="SpringJDBCSupport.ReadData.PersonDAO">
  <property name="jdbcTemplate">
    <ref local="jdbcTemplate"/>
  </property>
</bean> 
</beans>

 JavaBean:

 

package SpringJDBCSupport.ReadData;
import com.mysql.jdbc.Driver;
public class Person ...{
  private String name;
  private String password;
  private String address;
  public Person()...{
      
  }
  public Person(String name,String password,String address)...{
      this.name=name;
      this.password=password;
      this.address=address;
  }
public String getAddress() ...{
    return address;
}
public void setAddress(String address) ...{
    this.address = address;
}
public String getName() ...{
    return name;
}
public void setName(String name) ...{
    this.name = name;
}
public String getPassword() ...{
    return password;
}
public void setPassword(String password) ...{
    this.password = password;
}
public String toString()...{
    return this.getName()+"-"+this.getPassword()+"-"+this.getAddress();
}
}

 

DAO：

其中getPersonByRowCallbackHandler方法根据username获得person对象

package SpringJDBCSupport.ReadData;

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

import org.springframework.jdbc.core.BatchPreparedStatementSetter;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;

public class PersonDAO ...{
  private JdbcTemplate jdbcTemplate;

public JdbcTemplate getJdbcTemplate() ...{
    return jdbcTemplate;
}

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

public int insertPersonUseUpdate(Person person)...{
    String sql="insert into login values(?,?,?)";
    Object[] params=new Object[]...{
            person.getName(),
            person.getPassword(),
            person.getAddress()
    };
    return this.getJdbcTemplate().update(sql,params);
}
public int insertPersonUseExecute(Person person)...{
    String sql="insert into login values(?,?,?)";
    Object[] params=new Object[]...{
            person.getName(),
            person.getPassword(),
            person.getAddress()
    };
    int[] types=new int[]...{
            Types.VARCHAR,
            Types.VARCHAR,
            Types.VARCHAR
    };
    return this.getJdbcTemplate().update(sql,params,types);
}
public int[] updatePersonUseBatchUpdate( final List persons)...{
    String sql="insert into login values(?,?,?)";
    BatchPreparedStatementSetter setter=null;
    setter=new BatchPreparedStatementSetter()...{
        public int getBatchSize()...{
            return persons.size();
        }
        public void setValues(PreparedStatement ps,int index) throws SQLException...{
            Person person=(Person)persons.get(index);
            ps.setString(1,person.getName());
            ps.setString(2,person.getPassword());
            ps.setString(3,person.getAddress());
        }
    };
    return this.getJdbcTemplate().batchUpdate(sql,setter);
}

public Person getPersonByRowCallbackHandler(String username)...{

    String sql="select * from login where username=?";
    final Person person=new Person();
    final Object params[]=new Object[]...{username};
    this.getJdbcTemplate().query(sql,params,new RowCallbackHandler()...{
        public void processRow(ResultSet rs)throws SQLException...{
            person.setName(rs.getString("username"));
            p