在IntelliJ IDEA上使用Maven创建SSM项目

1.使用IntelliJ IDEA创建Mawen WEB项目
File -> New -> Project -> New Project 选择 Maven 选中 create from archetype 然后选择 org-apache.maven.archetypes:maven-archetype-webapp

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配置 maven 環境 & 新建 archetypeCatalog:internal 屬性

image.png

引入依賴包


    
      mysql
      mysql-connector-java
      8.0.16
    

    
      org.mybatis
      mybatis
      3.5.2
    

    
      org.slf4j
      slf4j-log4j12
      1.7.28
    

    
      junit
      junit
      4.12
    

    
      cglib
      cglib
      3.1
    

    
    
      com.alibaba
      druid
      1.1.20
    
    
      org.mybatis
      mybatis-spring
      2.0.2
    
    
      org.springframework
      spring-jdbc
      5.2.0.RELEASE
    
    
    
      org.springframework
      spring-test
      5.2.0.RELEASE
    
    
    
      org.springframework
      spring-context
      5.2.0.RELEASE
    
    
    org.springframework
    spring-web
    5.2.0.RELEASE
    

    
      org.springframework
      spring-aop
      5.2.0.RELEASE
    

    
      org.springframework
      spring-webmvc
      5.2.0.RELEASE
    
      
          org.springframework
          spring-tx
          5.2.0.RELEASE
      
      
          org.springframework
          spring-jdbc
          5.2.0.RELEASE
      

    
      javax.servlet
      servlet-api
      2.5
      provided
    
    
      javax.servlet.jsp
      jsp-api
      2.0
      provided
    
    
      jstl
      jstl
      1.2

准备数据(DB)

[email protected] : testdb【10:55:55】13 SQL->create database ssmdemo;

[email protected] : testdb【12:18:14】14 SQL->use ssmdemo;

[email protected] : ssmdemo【12:18:26】15 SQL->
create table account 
 (
   id int primary key auto_increment,
   name varchar(50),
   money double
 );

[email protected] : ssmdemo【12:18:38】16 SQL->select * from account;
+----+------+-------+
| id | name | money |
+----+------+-------+
|  1 | xag  |   123 |
+----+------+-------+

resources文件夹
在main文件夹下创建一个resources文件夹：右键main，new->Directory 右键新建的resources文件夹 -> Make Directory As -> Resources Root 作为资源文件夹, resources下新建META-INF目錄(Directory)，META-INF里创建applicationContext.xml配置文件：new - >XML Configuration File -> Spring Config 注：右上角有个提示需要点击, 【新建sources root】右键main，new->Directory 右键新建的java文件夹 -> Make Directory As ->sources root
測試
5.1 Spring 測試
applicationContext.xml 文件中配置bean

創建測試代碼（com.xag 下新建 controller package,controller 下新建 HelloWord.java)

package com.xag.controller;

public class HelloWord
{
    public String name;

    public void setName(String name) {
        this.name = name;
    }

    public void hello()
    {
        System.out.print("hello:" + name);
    }
}

新建 Spring的測試類 TestHello (com.xag.test目錄下）--可以允許此類測試

package com.xag.test;

import com.xag.controller.HelloWord;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.junit.Test;

public class TestHello
{
    @Test
    public void run1()
    {
        //1.创建spring的ioc容器对象
        ApplicationContext ctx = new ClassPathXmlApplicationContext("META-INF/applicationContext.xml");
        //2.从ioc容器中获取bean实例
        HelloWord helloWorld = (HelloWord) ctx.getBean("helloWorld");
        helloWorld.hello();
    }
}

5.2 Mybaits 测试
新建mybatis-config.xml 文件（resources目录下）

新建 MyMapper.xml 文件（resources/mappers目录下）

新建 log4j.properties 文件（resources目录下）

log4j.rootLogger=DEBUG,A1
log4j.logger.org.apache=DEBUG
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c]-[%p] %m%n

新建Account 類（main/java 下創建com.xag.domain 和 com.xag.test）

package com.xag.domain;

import java.io.Serializable;

public class Account implements Serializable {
    private Integer id;
    private String name;
    private Double money;

    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 Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }

    @Override
    public String toString()
    {
        return "Account{" +  "id=" + id +  ", name='" + name + '\'' +  ", money=" + money + '}';
    }
}

新建TestMybatis.java( com.xag.test下）,運行此類可以做測試

package com.xag.test;

import com.xag.domain.Account;
import org.junit.Test;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import java.io.InputStream;

public class TestMybatis
{
    @Test
    public void run2()
    {
        // 获取sqlSession
        SqlSession sqlSession ;
        try {
            // 指定全局配置文件
            String resource = "mybatis-config.xml";
            // 读取配置文件
            InputStream inputStream = Resources.getResourceAsStream(resource);
            // 构建sqlSessionFactory
            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
            // 获取sqlSession
            sqlSession = sqlSessionFactory.openSession();
            // 操作CRUD，第一个参数：指定statement，规则：命名空间+“.”+statementId
            // 第二个参数：指定传入sql的参数：这里是用户id
            Account user = sqlSession.selectOne("MyMapper.selectAcc", 1);
            System.out.println(user);
            sqlSession.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        finally
        {

        }
    }
}

5.3 Mybaits 测试2--使用动态代理改造CRUD
新建 AccMapper接口（com.xag.dao目錄下）

package com.xag.dao;

import com.xag.domain.Account;
import java.util.List;

public interface AccMapper
{
    public Account queryAccById(Long id);

    public List findAll();

    public void insertAcc(Account acc);
}

新建AccMapper.xml文件（resource/mappers目錄下）





    

    

    
        INSERT INTO account(id,name,money) VALUES (null,#{name},#{money});

全局配置文件mybatis-config.xml引入AccMapper.xml

创建TestAccMapper测试用例(com.xag.test下）

package com.xag.test;


import com.xag.dao.AccMapper;
import com.xag.domain.Account;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;
import java.io.InputStream;

public class TestAccMapper
{
    public AccMapper accMapper;

    @Before
    public void setUp() throws Exception {
        // 指定配置文件
        String resource = "mybatis-config.xml";
        // 读取配置文件
        InputStream inputStream = Resources.getResourceAsStream(resource);
        // 构建sqlSessionFactory
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        // 获取sqlSession
        SqlSession sqlSession = sqlSessionFactory.openSession(true);

        // 1. 映射文件的命名空间（namespace）必须是mapper接口的全路径
        // 2. 映射文件的statement的id必须和mapper接口的方法名保持一致
        // 3. Statement的resultType必须和mapper接口方法的返回类型一致
        // 4. statement的parameterType必须和mapper接口方法的参数类型一致（不一定）
        this.accMapper = sqlSession.getMapper(AccMapper.class);
    }

    @Test
    public void testQueryAccById()
    {
        long i=1;
        System.out.println(this.accMapper.queryAccById(i));
    }

    @Test
    public void testInsertAcc() {
        Account user = new Account();
        user.setName("大神");
        user.setMoney(500d);
        this.accMapper.insertAcc(user);
        System.out.println(user.getId());
    }
}

Spring 集成Mybatis
6.1. 新建 mybatis-config_spring.xml （resources目錄下）（Spring 集成Mybatis 的配置文件）

6.2 新建spring配置文件,new - >XML Configuration File -> Spring Config --> applicationContext-dao.xml（resources/spring 下）注：右上角有个提示需要点击

6.2 新建 db.properties 文件（resources/properties下）将先前的log4j.properties 也移到此目录

jdbc.driver=com.mysql.jdbc.Driver
jdbc.host=192.168.40.8
jdbc.database=ssmdemo
jdbc.userName=root
jdbc.passWord=123456
jdbc.initialSize=0
jdbc.maxActive=20
jdbc.maxIdle=20
jdbc.minIdle=1
jdbc.maxWait=3000

6.3 新建 AccountService 接口(com.xag.service目錄下)

package com.xag.service;

import com.xag.domain.Account;

import java.util.List;

public interface AccountService {
    // 查询所有账户
    public List findAll();

    // 保存帐户信息
    public void insertAcc(Account acc);
}

6.4 新建 AccountServiceImpl 實現類（com.xag.service.Impl目錄下）

package com.xag.service.Impl;

import com.xag.dao.AccMapper;
import com.xag.domain.Account;
import com.xag.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
@Service("accountService")
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccMapper accMapper;

    @Override
    public List findAll() {
        System.out.println("Service业务层：查询所有账户...");
        return accMapper.findAll();
    }

    @Override
    public void insertAcc(Account acc) {
        System.out.println("Service业务层：保存帐户...");
        accMapper.insertAcc(acc);
    }
}

6.5 新建TestSpring 測試程序(com.xag.test下）

package com.xag.test;

import com.xag.service.AccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestSpring
{
    @Test
    public void run3()
    {
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:spring/applicationContext-dao.xml");
        AccountService as = (AccountService) ac.getBean("accountService");
        as.findAll();
    }
}

6.6 新建 TestAccMapperSpring 測試程序(com.xag.test下）

package com.xag.test;

import com.xag.dao.AccMapper;
import com.xag.domain.Account;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import java.util.List;

//目标：测试一下spring的bean的某些功能
@RunWith(SpringJUnit4ClassRunner.class)//junit整合spring的测试//立马开启了spring的注解
@ContextConfiguration(locations="classpath:spring/applicationContext-*.xml")//加载核心配置文件，自动构建spring容器
public class TestAccMapperSpring
{
    @Autowired
    public AccMapper accMapper;

    @Test
    public void testQueryAccById()
    {
        long i=1;
        System.out.println(this.accMapper.queryAccById(i));
    }

    @Test
    public void testFindAll() {
        List accList = this.accMapper.findAll();
        for (Account user : accList) {
            System.out.println(user);
        }
    }

    @Test
    public void testInsertAcc()
    {
        Account acc = new Account();
        acc.setName("大神S");
        acc.setMoney(500d);
        this.accMapper.insertAcc(acc);
        System.out.println(acc.getId());
    }

}

SpringMVC框架代码的编写
7.1 在web.xml (webapp/WEB-INFO)中配置DispatcherServlet前端控制器




  Archetype Created Web Application

  
  
    org.springframework.web.context.ContextLoaderListener
  
  
  
    contextConfigLocation
    classpath:spring/applicationContext-dao.xml
  


  
  
    dispatcherServlet
    org.springframework.web.servlet.DispatcherServlet
    
    
      contextConfigLocation
      classpath:springmvc.xml
    
    
    1
  
  
    dispatcherServlet
    /
  

  
  
    characterEncodingFilter
    org.springframework.web.filter.CharacterEncodingFilter
    
      encoding
      UTF-8
    
  
  
    characterEncodingFilter
    /*

7.2 在resources资源文件夹中创建springmvc.xml配置文件

7.3 webapp下创建 index.jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    Title


测试查询
测试包

    姓名：

    金额：

8.5 在controller层中的AccountController的class类

package com.xag.controller;

import com.xag.domain.Account;
import com.xag.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@Controller
public class AccountController {

    @Autowired
    private AccountService accountService;

    @RequestMapping("/account/findAll")
    public String findAll(Model model){  //存数据， Model对象
        System.out.println("Controller表现层：查询所有账户...");
        // 调用service的方法
        List list = accountService.findAll();
        model.addAttribute("list",list);
        return "list";
    }

    @RequestMapping("/account/save")
    public void save(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException {
        accountService.insertAcc(account);
        response.sendRedirect(request.getContextPath()+"/account/findAll");
        return;
    }
}

8.6 创建controller跳转的list.jsp页面了(webapp\WEB-INF\pages) 下

<%--
  Created by IntelliJ IDEA.
  User: Bule
  Date: 2019/9/2
  Time: 7:32
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>



    Title


查询所有的账户

    ${account.name}

8.7 部署Tomcat进行测试

image.png

運行 index.jsp 測試tomcat 如 index.jsp 的URL 非下圖，則配置為下圖：

image.png

在IntelliJ IDEA上使用Maven创建SSM项目

测试包

查询所有的账户

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