Restful style

One 、 Import dependence

<!--java Web Remember to complete the project war package -->
<packaging>war</packaging>
    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.10.RELEASE</version>
        </dependency>

        <!--JSON  Data conversion support -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.0</version>
        </dependency>
    </dependencies>

Two 、 Entity class

public class User {
    

    private Integer id;
    private String name;

    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;
    }

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

3、 ... and 、 The configuration file

springMVC.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: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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!-- Turn on annotation scanning -->
    <context:component-scan base-package="com.ceshi.controller"/>

    <!-- Processor adapter    Processor mapper -->
    <mvc:annotation-driven/>

    <!-- spring Official team   It's very important to   The processing of static resources if we use the interception path / In the form of   Need to release static resources  -->
    <mvc:default-servlet-handler/>
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    <!-- Coding filter -->
    <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> 

  <!-- Front controller -->
    <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:springMVC.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <!--<url-pattern>*.do</url-pattern>-->
        <url-pattern>/</url-pattern>
    </servlet-mapping>

Four 、controller layer

/** * RESTful style  */
@Controller
@RequestMapping("/user")
public class UserController {
    

    @GetMapping("/{id}")
    public @ResponseBody String testGet(@PathVariable("id") Integer id){
    
        System.out.println("get:"+id);
        return " The query is successful ";
    }
    
    @PostMapping
    public @ResponseBody String testPost(@RequestBody User user){
    
        System.out.println("post:"+user);
        return " Added successfully ";
    }

    @PutMapping
    public @ResponseBody String testPut(@RequestBody User user){
    
        System.out.println("put:"+user);
        return " The update is successful ";
    }
    
    @DeleteMapping("/{id}")
    public @ResponseBody String testDelete(@PathVariable("id") Integer id){
    
        System.out.println("delete:"+id);
        return " Delete successful ";
    }
}

5、 ... and 、web resources

A little … Sorry ha … I am interested in the test