SSM整合-Rest风格开发SpringMVC 05

一、

二、环境
1、配置

1.1、新建spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--    扫描sprig的bean-->
    <!--    只扫描controller下的-->
    <context:component-scan base-package="com.itheima.controller"/>
    <!--    mvc驱动-->
    <mvc:annotation-driven/>
</beans>

1.2、修改applicationContext.xml,为了避免重复扫描

1.3、修改web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
          http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">
  <!--用于解决中文乱码-->
  <filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <!--拦截-->
  <servlet>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath*:spring-mvc.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>DispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

2、centroller层

@RestController
@RequestMapping("/user")
public class UserController {

    @PostMapping
    public String save(User user) {
        System.out.println("save" + user);
        return "";
    }

    @PutMapping
    public String update(User user) {
        System.out.println("update" + user);
        return "";
    }

    @DeleteMapping("/{uuid}")
    public String delete(@PathVariable int uuid) {
        System.out.println("delete" + uuid);
        return "";
    }

    @GetMapping("/{uuid}")
    public User get(@PathVariable int uuid) {
        System.out.println("get" + uuid);
        return null;
    }

    @GetMapping("/{page}/{size}")
    public List<User> getAll(@PathVariable int page, @PathVariable int size) {
        System.out.println("getAll" + page + ":" + size);
        return null;
    }

    @PostMapping("/login")//为了和save的请求做区分
    public User login(String userName, String password) {
        System.out.println("login"+userName +";"+ password);
        return null;
    }
}

3、在pom.xml添加tomcat插件坐标

<!--tomcat插件,启动当前的应用-->
<build>
    <finalName>springmvc_ssm</finalName>
    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.1</version>
                <!--http默认端口改为80端口-->
                <configuration>
                    <!--修改tomcat启动的端口号-->
                    <port>80</port>
                    <!--
                    修改tomcat部署当前项目的虚拟目录(项目的访问根路径)
                    这改为 / 就表示你访问localhost/就是你的index页面
                    -->
                    <path>/</path>
                </configuration>
            </plugin>
        </plugins>
    </pluginManagement>
</build>

4、用postman测试