spring+springMvc+mybatis框架(SSM)整合步骤

忘是亡心i 2022-05-30 10:41 240阅读 0赞

**开发工具使用eclipse，**

**项目的结构：**

**![20180310191613523][]**

**搭建步骤：**

1.创建Maven war项目导入Spring MVC包 pom.xml:

<dependency>
      <groupId>spring-webmvc</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>3.2.8.RELEASE</version>
    </dependency> 
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>3.2.8.RELEASE</version>
    </dependency> 
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>3.2.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>3.2.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.3.4</version>
    </dependency>

2.在web.xml中配置Spring MVC的主控制器

<servlet>
         <servlet-name>mvc</servlet-name>
         <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
         </servlet-class>
         <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-*.xml</param-value>
         </init-param>
         <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
         <servlet-name>mvc</servlet-name>
         <url-pattern>*.do</url-pattern>
    </servlet-mapping>

3.在resource中添加Spring配置文件 spring-web.xml：

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:context="http://www.springframework.org/schema/context" 
        xmlns:jdbc="http://www.springframework.org/schema/jdbc"  
        xmlns:jee="http://www.springframework.org/schema/jee" 
        xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:aop="http://www.springframework.org/schema/aop" 
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xmlns:util="http://www.springframework.org/schema/util"
        xmlns:jpa="http://www.springframework.org/schema/data/jpa"
        xsi:schemaLocation="
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
            http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
            http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
            http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
            http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
    
        
        <context:component-scan 
            base-package="cn.cai.web"/>
        
        <mvc:annotation-driven/>
    
    </beans>

4.在cn.cai.web包中添加测试控制器类 DemoController.java:

@Controller
    @RequestMapping("/demo")
    public class DemoController {
    
        @RequestMapping("/hello.do")
        @ResponseBody
        public Object hello(){
            return 
                new String[]{"Hello", "World!"};
        }
    }

5.在项目Properties中选择运行环境为Tomcat Server：

![20180310174624924][]

6.部署项目到Tomcate，并且启动浏览器进行测试

请求：http://localhost:8080/note/demo/hello

> 如果有异常，请进行适当的调试， 解决错误...

7.导入MyBatis相关的包 pom.xml:

<dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.2.4</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.4</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.0.8</version>
    </dependency>
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>3.2.8.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>

> 需要导入JUnit 用于测试时候使用。

8.添加spring-mybatis.xml文件用于配置MyBatis

9.在spring-mybatis.xml中添加数据库连接池配置：

> 提示：password属性的值是MySQL数据库安装时候的密码！！

10.利用Junit测试DataSource：

public class MyBatisTestCase {
    
        ClassPathXmlApplicationContext ctx;
        @Before
        public void init(){
            ctx = new ClassPathXmlApplicationContext(
                "spring-web.xml",
                "spring-mybatis.xml");
        }
        @Test
        public void testDataSource(){
            DataSource ds = ctx.getBean(
                "dataSource", DataSource.class);
            System.out.println(ds); 
        }
    }

> @Before 注解会在测试方法之前咨询，这里用于初始化 Spring 容器ctx。

11.添加MyBatis SqlSessionFactory 配置：

12.测试 SqlSessionFactory

@Test
    public void testSqlSessionFactory(){
        SqlSessionFactory factory=
            ctx.getBean("sqlSessionFactory",
            SqlSessionFactory.class);
        System.out.println(factory);
    }

13.添加Mapper接口扫描器配置：

14.测试 mapperScanner

@Test
    public void testMapperScanner(){
        MapperScannerConfigurer scanner=
            ctx.getBean("mapperScanner",
            MapperScannerConfigurer.class);
        System.out.println(scanner); 
    }

15.在cn.cai.dao包中添加Mapper接口 UserDao.java：

public interface UserDao {
        void saveUser(User user);
    }

> 提示：一定放到cn.cai.dao包中，与配置文件相呼应！！

16.根据数据库的表结构添加实体类：

表结构： desc cn\_user;

实体类：

public class User implements Serializable{
        private static final long serialVersionUID = -2677335708367280584L;
    
        private String id;
        private String name;
        private String password;
        private String token;
        private String nick;
    
        public User() {
        }
    
        public User(String id, String name, String password, String token, String nick) {
            super();
            this.id = id;
            this.name = name;
            this.password = password;
            this.token = token;
            this.nick = nick;
        }
    
        public String getId() {
            return id;
        }
    
        public void setId(String id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getPassword() {
            return password;
        }
    
        public void setPassword(String password) {
            this.password = password;
        }
    
        public String getToken() {
            return token;
        }
    
        public void setToken(String token) {
            this.token = token;
        }
    
        public String getNick() {
            return nick;
        }
    
        public void setNick(String nick) {
            this.nick = nick;
        }
    
        @Override
        public int hashCode() {
            final int prime = 31;
            int result = 1;
            result = prime * result + ((id == null) ? 0 : id.hashCode());
            return result;
        }
    
        @Override
        public boolean equals(Object obj) {
            if (this == obj)
                return true;
            if (obj == null)
                return false;
            if (getClass() != obj.getClass())
                return false;
            User other = (User) obj;
            if (id == null) {
                if (other.id != null)
                    return false;
            } else if (!id.equals(other.id))
                return false;
            return true;
        }
    
        @Override
        public String toString() {
            return "User [id=" + id + ", name=" + name + ", password=" + password + ", token=" + token + ", nick=" + nick
                    + "]";
        }
    }

> 提示：实体类要遵守Java Bean规范

16.在src/main/resource/mappers中添加 Mapper 映射文件 UserMapper.xml:

<?xml version="1.0" encoding="UTF-8" ?>  
    <!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"      
     "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">
    <mapper namespace="cn.cai.dao.UserDao">
        <insert id="saveUser"
            parameterType="cn.cai.entity.User">
            insert into cn_user
                (cn_user_id,
                cn_user_name,
                cn_user_password,
                cn_user_token,
                cn_user_nick)
            values
                (#{id}, #{name}, #{password},
                #{token}, #{nick})
        </insert>
    </mapper>

> 其中insert语句与Mapper接口中的saveUser方法对应。

17.更新SqlSessionFactory的配置，添加映射文件位置：

18.测试：

@Test
    public void testSaveUser(){
        UserDao dao = ctx.getBean(
            "userDao", UserDao.class);
        User user=new User("123", "Tom",
            "123", "", "Cat");
        dao.saveUser(user);
        //select * from cn_user  where cn_user_id='123'
    }

> 测试结果在数据库中查询：`select * from cn_user where cn_user_id='123'`

19.添加读取用户信息方法 UserDao.java:

User findUserById(String id);

20.在UserMapper.xml中添加SQL语句：

<select id="findUserById"
        parameterType="string"
        resultType="cn.cai.entity.User">
        select 
            cn_user_id as id,  
            cn_user_name as name,
            cn_user_password as password,
            cn_user_token as token,
            cn_user_nick as nick
        from 
            cn_user
        where
            cn_user_id=#{id}
    </select>

21.测试：

@Test
    public void testFindUserById(){
        UserDao dao = ctx.getBean(
            "userDao", UserDao.class);
        String id="123";
        User user=dao.findUserById(id);
        System.out.println(user); 
    }

> 注意: 返回user信息要包含全部的属性数据。

以上就是SSm框架的简单整合步骤，有不对的欢迎指出

[20180310191613523]: /images/20220530/ec56aa725838407a95f5fcf870400f62.png
[20180310174624924]: /images/20220530/e521cb89538647d68e21b86c5382954e.png