一.spring整合jdbc
1.配置applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd ">
<!-- 指定spring读取db.properties配置 文件-->
<context:property-placeholder location="classpath:db.properties" />
<!-- 1.将连接池放入spring容器 -->
<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
<property name="jdbcUrl" value="${jdbc.jdbcUrl}" ></property>
<property name="driverClass" value="${jdbc.driverClass}" ></property>
<property name="user" value="${jdbc.user}" ></property>
<property name="password" value="${jdbc.password}" ></property>
</bean>
<!-- 2.将JDBCTemplate放入spring容器 -->
<bean name="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" >
<property name="dataSource" ref="dataSource" ></property>
</bean>
<!-- 3.将UserDao放入spring容器 -->
<bean name="userDao" class="com.auicyh.a_jdbctemplate.UserDaoImpl" >
<property name="jt" ref="jdbcTemplate" ></property>
<!-- <property name="dataSource" ref="dataSource" ></property> -->
</bean>
</beans>
2.db.properties文件
3.UserDao.java
public interface UserDao {
// 增
void save(User u);
// 删
void delete(Integer id);
// 改
void update(User u);
// 查
User getById(Integer id);
// 查
int getTotalCount();
// 查
List<User> getAll();
}
4.UserDaoImpl.java
public class UserDaoImpl implements UserDao{
private JdbcTemplate jt;
/**
* 为什么这里设置set方法
* @param jt
*/
public void setJt(JdbcTemplate jt) {
System.out.println("jt = "+jt);
this.jt = jt;
}
@Override
public void save(User u) {
String sql = "insert into user values('1111131111111111',?,null,null,null,null,null,null,null,null) ";
jt.update(sql, u.getUsername());
}
@Override
public void delete(Integer id) {
String sql = "delete from t_user where id = ? ";
jt.update(sql,id);
}
@Override
public void update(User u) {
String sql = "update t_user set name = ? where id=? ";
jt.update(sql, u.getName(),u.getUid());
}
@Override
public User getById(Integer id) {
String sql = "select * from t_user where id = ? ";
return jt.queryForObject(sql,new RowMapper<User>(){
@Override
public User mapRow(ResultSet rs, int arg1) throws SQLException {
User u = new User();
u.setUid(rs.getString("uid"));
u.setName(rs.getString("username"));
return u;
}}, id);
}
@Override
public int getTotalCount() {
String sql = "select count(*) from user ";
Integer count = jt.queryForObject(sql, Integer.class);
return count;
}
@Override
public List<User> getAll() {
String sql = "select * from user ";
List<User> list = jt.query(sql, new RowMapper<User>(){
@Override
public User mapRow(ResultSet rs, int arg1) throws SQLException {
User u = new User();
u.setUid(rs.getString("uid"));
u.setUsername(rs.getString("username"));
return u;
}});
return list;
}
}
测试类
//演示JDBC模板
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class Demo {
@Resource(name="userDao")
private UserDao ud;
@Test
public void fun1() throws Exception{
//0 准备连接池
ComboPooledDataSource dataSource = new ComboPooledDataSource();
dataSource.setDriverClass("com.mysql.jdbc.Driver");
dataSource.setJdbcUrl("jdbc:mysql:///obd");
dataSource.setUser("root");
dataSource.setPassword("123456");
//1 创建JDBC模板对象
JdbcTemplate jt = new JdbcTemplate();
jt.setDataSource(dataSource);
//2 书写sql,并执行
String sql = "insert into user values('1234567890-09','rose',null,null,null,null,null,null,null,null) ";
jt.update(sql);
}
@Test
public void fun2() throws Exception{
User u = new User();
u.setUsername("tom");
ud.save(u);
}
@Test
public void fun3() throws Exception{
User u = new User();
u.setUid("2");
u.setName("jack");
ud.update(u);
}
@Test
public void fun4() throws Exception{
ud.delete(2);
}
@Test
public void fun5() throws Exception{
System.out.println(ud.getTotalCount());
}
@Test
public void fun6() throws Exception{
System.out.println(ud.getById(1));
}
@Test
public void fun7() throws Exception{
System.out.println(ud.getAll());
}
}
二.spring管理事务的方式
1.编码方式
1.1 将核心事务管理器配置到spring容器
1.2 配置TransactionTemplate模板
1.3 将事务模板注入Service
1.4 在Service中调用模板
2.xml配置方式
2.3 配置通知
2.4 配置将通知织入目标
3.注解方式
3.1 导包
3.2 导入新的约束
3.3 开启注解管理事务
3.4 使用注解