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* 封装冗余代码获取SqlSession
public class MyBatisUtils {
private static SqlSessionFactory ssf;
static {
String resource="SqlMapConfig.xml";
try {
InputStream is = Resources.getResourceAsStream(resource);
SqlSessionFactoryBuilder builder=new SqlSessionFactoryBuilder();
ssf=builder.build(is);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* @return
* 1 获得SqlSessionFactory(重量级,只获取一次)
*/
public static SqlSessionFactory getSqlSessionFactory(){
return ssf;
}
/**
* @return
* // 2 获得SqlSession
*/
public static SqlSession getSqlSession(){
return ssf.openSession();
}
/**
* @param session
* // 3 提供关闭SqlSession的方法
*/
public static void close(SqlSession session){
session.close();
}
}
* 测试增删改查
/**
* 查询
*/
@Test
public void test1(){
// 获取SqlSession
SqlSession sqlSession = MyBatisUtils.getSqlSession();
List<User> users = sqlSession.selectList("hx.findUsers");
for (User user:users) {
System.out.println(user);
}
// 关闭SqlSession
MyBatisUtils.close(sqlSession);
}
/**
* 插入
*/
@Test
public void test2(){
// 获取SqlSession
SqlSession sqlSession = MyBatisUtils.getSqlSession();
User user=new User();
user.setUsername("xiaoxiao");
user.setPsw("888");
user.setSex('男');
sqlSession.insert("hx.insertUser",user);
sqlSession.commit();
// 关闭SqlSession
MyBatisUtils.close(sqlSession);
}
/**
* 删除
*/
@Test
public void test3(){
// 获取SqlSession
SqlSession sqlSession = MyBatisUtils.getSqlSession();
sqlSession.delete("hx.deleteUserById",5);
sqlSession.commit();
// 关闭SqlSession
MyBatisUtils.close(sqlSession);
}
/**
* 更新
*/
@Test
public void test4(){
// 获取SqlSession
SqlSession sqlSession = MyBatisUtils.getSqlSession();
User user=new User();
user.setId(6);
user.setUsername("xiaohong");
user.setPsw("123");
sqlSession.update("updateUser",user);
sqlSession.commit();
// 关闭SqlSession
MyBatisUtils.close(sqlSession);
}