Mybatis,Ibatis,添加,修改,删除,获得结果集

 Mybatis,Ibatis,添加,修改,删除,获得结果集 

1.获得结果集 

 "selectUserFromId" parameterType="int" resultType="com.zakisoft.ibt.UserVo">
         select * from user where id = #{id}


     "selectAllUsers" resultType="com.zakisoft.ibt.UserVo">
         select * from user

 public List selectUserFromId(int id) {
         SqlSession session = sqlSessionFactory.openSession();
         List users = null;
         try {
             UserOp mapper = session.getMapper(UserOp.class);
             users = mapper.selectUserFromId(id);
             if (0 < users.size()) {
                 UserVo user = (UserVo) users.get(0);
                 System.out.println("Get User Name: " + user.getName());
             }
         } finally {
             session.close();
         }
         return users;
     }

     public List selectAllUsers() {
         SqlSession session = sqlSessionFactory.openSession();
         try {
             UserOp mapper = session.getMapper(UserOp.class);
             List users = mapper.selectAllUsers();
             if (0 < users.size()) {
                 UserVo user;
                 for (int i = 0; i < users.size(); i++) {
                     user = (UserVo) users.get(i);
                     System.out.println("User Id:" + user.getId() + " --- "
                             + "User Name:" + user.getName());
                 }
             }
         } finally {
             session.close();
         }
         return null;
     }

2.添加数据  

 "insertNewOneUser" keyProperty="id" parameterType="com.zakisoft.ibt.UserVo" useGeneratedKeys="true">
         insert into user (name, password) values (#{name},#{password})

 public int insertNewOneUser(UserVo user) {
         user = new UserVo();
         user.setName("username: " + new Random().nextInt());
         user.setPassword("passowrd: " + new Random().nextInt());

         SqlSession session = sqlSessionFactory.openSession();
         int count = 0;
         try {
             UserOp mapper = session.getMapper(UserOp.class);
             count = mapper.insertNewOneUser(user);
             System.out.println("count: " + count);
             // 请注意一定需要提交。
             session.commit();
         } finally {
             session.close();
         }

         return count;
     }

3.更新数据  

 "updateUser" parameterType="com.zakisoft.ibt.UserVo">
         update user set name = #{name}, password = #{password} where id = #{id}

 public int updateUser(UserVo user){
         SqlSession session = sqlSessionFactory.openSession();
         int count = 0;
         try {
             UserOp mapper = session.getMapper(UserOp.class);
             count = mapper.updateUser(user);
             System.out.println("count: " + count);
             // 请注意一定需要提交。
             session.commit();
         } finally {
             session.close();
         }
         return count;
     }

4.删除数据  

 "deleteUserById" parameterType="int">
         delete from user where id = #{id}

 public int deleteUserById(int id){
         SqlSession session = sqlSessionFactory.openSession();
         int count = 0;
         try {
             UserOp mapper = session.getMapper(UserOp.class);
             count = mapper.deleteUserById(id);
             System.out.println("count: " + count);
             // 请注意一定需要提交。
             session.commit();
         } finally {
             session.close();
         }
         return count;
     }

5.源码和例子下载 
http://www.zakisoft.com/?p=85