乱码问题
新建控制类 EncodingController
注意请求地址设置
@Controller
public class EncodingController {
@PostMapping("/e/t")
public String test(String name, Model model){
model.addAttribute("msg",name);
return "test";
}
}在web目录下新建 form.jsp
注意 action 和 method
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="/e/t" method="post">
<input type="text" name="name"/>
<input type="submit"/>
</form>
</body>
</html>web/WEB-INF/jsp/test.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
${msg}
</body>
</html>解决乱码
方式一：自己编写过滤器类
1.编写过滤器类 EncodingFilter
package com.allen.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() {
}
}2.在 web/WEB-INF/web.xml 目录下 注册过滤器类
注意：
<filter>
<filter-name>encoding</filter-name>
<filter-class>com.allen.filter.EncodingFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>方式二：web.xml中配置 SpringMVC 的过滤器类
注意：
<!--配置SpringMVC的过滤器类-->
<filter>
<filter-name>encoding2</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>encoding2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
