乱码问题
1. 使用原生filter解决
1. 前端jsp
<%--
Created by IntelliJ IDEA.
User: Wang
Date: 2020/9/9
Time: 9:30
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="/e/t1" method="post">
<input type="text" name="name">
<input type="submit">
</form>
</body>
</html>
2. 编写controller
package com.wang.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PostMapping;
@Controller
public class EncodingController {
//过滤器解决乱码
@PostMapping("/e/t1")
public String test(String name, Model model) {
System.out.println(name);
model.addAttribute("msg", name);
//返回的地址为转发的地址
return "test";
}
}
3. 编写过滤器
package com.wang.filter;
import javax.servlet.*;
import java.io.IOException;
public class EncodingFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
servletRequest.setCharacterEncoding("utf-8");
servletResponse.setCharacterEncoding("utf-8");
filterChain.doFilter(servletRequest, servletResponse);
}
@Override
public void destroy() {
}
}
4. 注册过滤器
<filter>
<filter-name>encoding</filter-name>
<filter-class>com.wang.filter.EncodingFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
注意, 此处url-pattern要写为/*, 这是由于要拦截所有的东西
spring配置中则写/, 这是由于如果拦截了.jsp, 会继续将jsp中的跳转的url继续拦截, 当找不到controller时会报404错误!
2. 使用SpringMVC提供的过滤器实现
在web.xml中配置
<!--配置SpringMVC的乱码过滤-->
<filter>
<filter-name>encoding</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>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
注意, 此处url-pattern要写为/*, 这是由于要拦截所有的东西