SpringMvc处理put、delete、patch请求

最新推荐文章于 2022-03-29 19:40:52 发布

cnkeysky

最新推荐文章于 2022-03-29 19:40:52 发布

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分类专栏： java 文章标签： springmvc delete请求 put请求 patch请求

本文链接：https://blog.youkuaiyun.com/cnkeysky/article/details/113738815

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导入 jar 包

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.3.3</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>4.0.1</version>
    <scope>provided</scope>
</dependency>
<!--
<script src="/webjars/axios/0.21.1/dist/axios.js"></script>
-->
<dependency>
    <groupId>org.webjars.npm</groupId>
    <artifactId>axios</artifactId>
    <version>0.21.1</version>
</dependency>

web.xml 配置

<?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_4_0.xsd"
         version="4.0">

    <!--提供 put、delete、patch 支持-->
    <filter>
        <filter-name>hiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>hiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--加载spring配置-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--加载springmvc配置-->
    <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-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>
</web-app>

项目结构和说明
html 页面代码
注意： 为 post 请求
因为 java 是通过 getParameter 进行获取，所以我们要通过 transformRequest 将数据转为 key=value&key1=value1的形式，
也就是表单的提交方式，响应类型时 application/x-www-form-urlencoded，这样 java 通过 _method 值区分请求方式

<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Demo</title>
    <script src="/webjars/axios/0.21.1/dist/axios.js"></script>
</head>
<body>
<h1>SpringMvc</h1>
<label>
    姓名：<input type="text" name="name" id="j-name">
</label>
<label>
    年龄：<input type="text" name="age" id="j-age">
</label>
<input type="button" value="提交" id="j-btn">
<script>
    let btn = document.getElementById("j-btn");
    btn.onclick = () => {
        let name = document.getElementById("j-name").value;
        let age = document.getElementById("j-age").value;
        axios({
            method: 'post',
            url: '/hello01',
            transformRequest: [(data, headers) => {
                let aux = ""
                for (let d in data) {
                    aux += encodeURIComponent(d) + "=" + encodeURIComponent(data[d]) + "&"
                }
                // _method 一定要提供，值可以为 put、delete、patch
                aux += "_method=put";
                return aux;
            }],
            data: {
                name: name,
                age: age
            }
        }).then(res => {
            console.log(res);
        }).catch(err => {
            console.log(err)
        });
    };
</script>
</body>
</html>

java 代码

@Controller
public class HelloController {
	// 这里写成 put、delete、patch 请求
    @PutMapping("/hello01")
    @ResponseBody
    public String hello( String name,
                        Integer age) {
        System.out.println("name = " + name);
        System.out.println("age = " + age);
        return "hello world";
    }
}