Spring JDBCTemplate原理及使用实例

<context:property-placeholder location="classpath:db.properties"/> //指定数据库连接配置文件
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> //托管dataSource bean
  <property name="user" value="${jdbc.user}"></property> //获取配置文件内容对dataSource进行初始化
  <property name="password" value="${jdbc.password}"></property>
  <property name="driverClass" value="${jdbc.driverClass}"></property>
  <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
</bean>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> //托管jdbcTemplate，引用dataSource
  <property name="dataSource" ref="dataSource"></property>
</bean>

String sql="insert into user (name,deptid) values (?,?)";

List<Object[]> batchArgs=new ArrayList<Object[]>();
batchArgs.add(new Object[]{"caoyc",6});
batchArgs.add(new Object[]{"zhh",8});
batchArgs.add(new Object[]{"cjx",8});

jdbcTemplate.batchUpdate(sql, batchArgs);

package com.proc;

public class User {
  private Integer id;
  private String name;
  private Integer deptid;
  public Integer getId() {
    return id;
  }
  public void setId(Integer id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public Integer getDeptid() {
    return deptid;
  }
  public void setDeptid(Integer deptid) {
    this.deptid = deptid;
  }

  public String toString() {
    return "User [id=" + id + ", name=" + name + ", deptid=" + deptid + "]";
  }
}

package com.proc;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Repository;

@Repository
public class UserDao {

  @Autowired
  private JdbcTemplate jdbcTemplate;
  
  public User get(int id){
    String sql="select id,name,deptid from user where id=?";
    RowMapper<User> rowMapper=new BeanPropertyRowMapper<User>(User.class);
    return jdbcTemplate.queryForObject(sql, rowMapper,id);
  }
}