主函数调用其他方法

package com.cy.mybatis.service;
 2 
 3 import java.util.List;
 4 
 5 import org.apache.ibatis.session.SqlSession;
 6 
 7 import com.cy.mybatis.beans.UserBean;
 8 import com.cy.mybatis.tools.DBTools;
 9 import com.cy.mybatis.mapper.UserMapper;
10 
11 public class UserService {
12 
13    
14 15      
16     public static void main(String[] args) {
17           insertUser();
18 //        deleteUser();
19 //        selectUserById();
20 //        selectAllUser();
21     }
22 
23     
24     /**
25      * 新增用户
26      */
27     private static void insertUser() {
28         SqlSession session = DBTools.getSession();
29         UserMapper mapper = session.getMapper(UserMapper.class);
30         UserBean user = new UserBean("懿", "1314520", 7000.0);
31         try {
32             mapper.insertUser(user);
33             System.out.println(user.toString());
34              session.commit();
35         } catch (Exception e) {
36             e.printStackTrace();
37             session.rollback();
38         }
39     }
40     
41     
42     /**
43      * 删除用户
44      */
45     private static void deleteUser(){
46         SqlSession session=DBTools.getSession();
47         UserMapper mapper=session.getMapper(UserMapper.class);
48         try {
49             mapper.deleteUser(1);
50             session.commit();
51         } catch (Exception e) {
52             e.printStackTrace();
53             session.rollback();
54         }
55     }
56     
57     
58     /**
59      * 根据id查询用户
60      */
61     private static void selectUserById(){
62         SqlSession session=DBTools.getSession();
63         UserMapper mapper=session.getMapper(UserMapper.class);
64         try {
65         UserBean user=    mapper.selectUserById(2);
66         System.out.println(user.toString());
67             
68             session.commit();
69         } catch (Exception e) {
70             e.printStackTrace();
71             session.rollback();
72         }
73     }
74     
75     /**
76      * 查询所有的用户
77      */
78     private static void selectAllUser(){
79         SqlSession session=DBTools.getSession();
80         UserMapper mapper=session.getMapper(UserMapper.class);
81         try {
82         List<UserBean> user=mapper.selectAllUser();
83         System.out.println(user.toString());
84         session.commit();
85         } catch (Exception e) {
86             e.printStackTrace();
87             session.rollback();
88         }
89     }
90     
91 
92 }