背景
举个例子，出现中文乱码的例子：提交表单的时候。
表单
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<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>Title</title></head><body><form action="/c02/t1" method="post"> <input type="text" name="name"> <input type="submit"></form></body></html> |
业务控制类
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package controller;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;@Controllerpublic class controllerDemo02 { @RequestMapping("/c02/t1") public String test1(String name, Model model){ System.out.println(name); model.addAttribute("message",name); return "test"; }} |
结果：出现乱码
解决方案
使用自己写的过滤器
自定义一个Filter过滤器，去过滤乱码
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package Filter;import javax.servlet.*;import java.io.IOException;public class EncodingFilter implements Filter { public void init(FilterConfig filterConfig) throws ServletException { } public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { servletRequest.setCharacterEncoding("utf-8"); servletResponse.setCharacterEncoding("utf-8"); filterChain.doFilter(servletRequest,servletResponse); } public void destroy() { }} |
在web.xml中配置这个过滤器
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<filter> <filter-name>EncodingFilter</filter-name> <filter-class>Filter.EncodingFilter</filter-class></filter><filter-mapping> <filter-name>EncodingFilter</filter-name> <url-pattern>/*</url-pattern></filter-mapping> |
使用SpringMVC提供的过滤器
直接在web.xml中配置（固定的）
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<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> |
如果上面两种方法还实现不了，在试试以下这个方法，大神编写的
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package Filter;import javax.servlet.*;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletRequestWrapper;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.Map;public class GenericEncodingFilter implements Filter { public void destroy() { } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { //处理response的字符编码 HttpServletResponse myResponse=(HttpServletResponse) response; myResponse.setContentType("text/html;charset=UTF-8"); // 转型为与协议相关对象 HttpServletRequest httpServletRequest = (HttpServletRequest) request; // 对request包装增强 HttpServletRequest myrequest = new MyRequest(httpServletRequest); chain.doFilter(myrequest, response); } public void init(FilterConfig filterConfig) throws ServletException { }}//自定义request对象，HttpServletRequest的包装类class MyRequest extends HttpServletRequestWrapper { private HttpServletRequest request; //是否编码的标记 private boolean hasEncode; //定义一个可以传入HttpServletRequest对象的构造函数，以便对其进行装饰 public MyRequest(HttpServletRequest request) { super(request);// super必须写 this.request = request; } // 对需要增强方法 进行覆盖 public Map getParameterMap() { // 先获得请求方式 String method = request.getMethod(); if (method.equalsIgnoreCase("post")) { // post请求 try { // 处理post乱码 request.setCharacterEncoding("utf-8"); return request.getParameterMap(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } else if (method.equalsIgnoreCase("get")) { // get请求 Map<String, String[]> parameterMap = request.getParameterMap(); if (!hasEncode) { // 确保get手动编码逻辑只运行一次 for (String parameterName : parameterMap.keySet()) { String[] values = parameterMap.get(parameterName); if (values != null) { for (int i = 0; i < values.length; i++) { try { // 处理get乱码 values[i] = new String(values[i] .getBytes("ISO-8859-1"), "utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } } } hasEncode = true; } return parameterMap; } return super.getParameterMap(); } //取一个值 public String getParameter(String name) { Map<String, String[]> parameterMap = getParameterMap(); String[] values = parameterMap.get(name); if (values == null) { return null; } return values[0]; // 取回参数的第一个值 } //取所有值 public String[] getParameterValues(String name) { Map<String, String[]> parameterMap = getParameterMap(); String[] values = parameterMap.get(name); return values; }} |
以上就是SpringMVC 中文乱码的解决方案的详细内容，更多关于SpringMVC 中文乱码的资料请关注服务器之家其它相关文章！
原文链接：https://juejin.cn/post/6944667529717481485
