springmvc中rest风格

Spring MVC进阶：RESTful API实现

最新推荐文章于 2022-11-09 16:19:46 发布

原创最新推荐文章于 2022-11-09 16:19:46 发布 · 270 阅读

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CC 4.0 BY-SA版权

本文详细介绍了如何在Spring MVC框架中实现RESTful风格的API，包括GET、POST、PUT和DELETE等HTTP方法的使用，以及如何通过过滤器配置支持PUT和DELETE请求。此外，还展示了如何在控制器中处理各种类型的数据请求，如参数接收、请求头信息读取、对象封装等。

<1>请求方式
GET: 查
POST：增
DELETE：删
PUT:改
但是一般的浏览器只支持get和post请求，不支持put和delete请求，那么我们就要配置过滤器，拦截所有的请求，识别真的请求方式，将其改变之后再传给DispatcheServlet
过滤器的配置方法，在web.xml中加上一下代码
<filter> <filter-name>filter</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>filter</filter-name> <url-pattern>/*</url-pattern>  </filter-mapping>

``
过滤器已经配置好。
下面是测试delete和put请仔细阅读

@ResponseBody
@Controller
public class Resultful {
@RequestMapping(value = “/testPut”,method = RequestMethod.PUT) //测试PUT请求
public String demo1(){
//假设这里是dao的update
return “hello”;
}
@RequestMapping(value = “/testDelete”,method = RequestMethod.DELETE) //测试DELETE请求
public String demo2(){
System.out.println(123);
//假设这里是dao的delete
return “hello”;
}
@RequestMapping(value = “/testParam”,method = RequestMethod.GET) //获取text中的值
public String demo3(@RequestParam(“userName”) String name){
System.out.println(123);
System.out.println(name);
return “hello”;
}

@RequestMapping(value = "/testParam1",method = RequestMethod.GET)          //非必须参数的接受
public String demo4(@RequestParam("userName") String name,@RequestParam(value = "age",required = false) int age){
    System.out.println(123);
    System.out.println(name+age);
    return "hello";
}
@RequestMapping(value = "/testHeader",method = RequestMethod.GET)          //接受请求头的信息和cookie的值
public String demo5(@RequestHeader("Accept") String length,@CookieValue("JSESSIONID") String jss){
    System.out.println(length);
    System.out.println(jss);
    return "hello";
}
/**
这才是mvc的强大之处，可以将前端的数据直接封装到引用类型的对象中。而且可以级联
Student类Address类 还有前端请看下面啊
*/
@RequestMapping(value = "/objectTest",method = RequestMethod.GET)          //接受引用类
public String demo6(Student student){
    System.out.println(student==null);
    System.out.println(student.getName());
    return "hello";
}
@RequestMapping(value = "/servletApiTest",method = RequestMethod.GET)          //mvc中也可以使用
public String demo7(HttpServletRequest request){
    System.out.println(request.getCookies());             //就像servlet中的一样使用即可
    return "hello";
}

}

//studen类

public class Student {
    private int id;
    private  String name;
    private  int age;
    private  Address address;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    @Override
    public String toString() {
        return this.name+age+address.toString();
    }


}




Address类

package Controller.Enitry;

import lombok.Data;
import lombok.ToString;

/**
 * @author 刘棋军
 * @date2019-03-11
 */

public class Address {
    private  String homeAddress;
    private  String schoolAddress;

    public String getHomeAddress() {
        return homeAddress;
    }

    public void setHomeAddress(String homeAddress) {
        this.homeAddress = homeAddress;
    }

    public String getSchoolAddress() {
        return schoolAddress;
    }

    public void setSchoolAddress(String schoolAddress) {
        this.schoolAddress = schoolAddress;
    }

    @Override
    public String toString() {
        return homeAddress+schoolAddress;
    }
}




前端


<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2019/3/11
  Time: 19:58
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <form action="/testDelete" method="post">
        <input type="hidden" name="_method" value="DELETE">
        <input type="submit" value="删"/>
    </form>
    <form action="/testPut" method="post">
        <input type="hidden" name="_method" value="PUT">
        <input type="submit" value="改"/>
    </form>
    <form action="/testParam">
        <input type="text" name="userName" />
        <input type="submit" value="参数"/>
    </form>
    <form action="/testHeader">
        <input type="submit" value="Header"/>
    </form>
    <form action="/objectTest">
        id:<input type="text" name="id"/>
        name:<input type="text" name="name"/>
        age:<input type="text" name="age"/>
        home:<input type="text" name="Address.homeAddress"/>
        school:<input type="text" name="Address.schoolAddress"/>
        <input type="submit" value="object"/>
    </form>
</body>
</html>