Spring使用JdbcTemplate操作数据库例子

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"));
            person.setPassword(rs.getString("passwd"));
            person.setAddress(rs.getString("address"));
        }
    });
    return person;
}
 
}



测试代码：



package SpringJDBCSupport.ReadData;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;

public class TestJDBCTemplate {

    public static String filePath="";
    public static BeanFactory factory=null;
    public static void main(String[] args) {
        filePath=System.getProperty("user.dir")+File.separator+"SpringJDBCSupport"+File.separator+"ReadData"+File.separator+"hello.xml";
        factory=new XmlBeanFactory(new FileSystemResource(filePath));
        PersonDAO personDAO=(PersonDAO)factory.getBean("personDAO");
        /**//*
         * 准备数据
         */
        Person p1=new Person("test1","test1","test1");
        Person p2=new Person("test2","test2","test2");
        Person p3=new Person("test3","test3","test3");
        Person p4=new Person("test4","test4","test4");
        Person p5=new Person("test5","test5","test5");
        List persons=new ArrayList();
        persons.add(p3);
        persons.add(p4);
        persons.add(p5);
        //使用jdbcTemplate.update方式
    //    personDAO.insertPersonUseUpdate(p1);
        //使用jdbcTemplate.execute方式
    //    personDAO.insertPersonUseExecute(p2);
    //    //使用jdbcTemplate批处理方式
    //    personDAO.updatePersonUseBatchUpdate(persons);
       
        //使用RowCallbackHandler执行一次查询,并打印person信息
        System.out.println(personDAO.getPersonByRowCallbackHandler("test1"));
    }
   
  

}



运行结果：

test1-test1-test1