在上次说到跨域中解决乱码问题,只是在拦截器中set编码格式,显然在接下来的项目中又遇到了新的问题:

在文件上传的过程中,和其一块过来的数据会发生中文乱码;在百度上扒拉了好久,才晓得是在文件上传的过程中,编码格式是不会随HTTP请求一块过来的,所以我修改了中间器,代码如下:

package com.xt.shop.base.interceptor;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.xt.shop.until.http.HttpUtil;/** *@description  TODO 跨域解决类 *@date  2017年11月30日 *@author  geYang **/public class SimpleCORSFilter implements Filter{    @Override    public void init(FilterConfig filterConfig) throws ServletException {        // TODO Auto-generated method stub            }        /**     *  请求头注释:     *  0: response.setContentType 设置响应格式;     *  0: response.setCharacterEncoding("UTF-8"); 设置响应参数为UTF-8     *  1: Access-Control-Allow-Origin 可以请求的域; *为允许所有域请求     *  2: Access-Control-Allow-Methods 请求方式     *  3: Access-Control-Max-Age  请求数据缓存时间(单位秒)     *  4: Access-Control-Allow-Credentials 保持跨域 AJAX时的 Cookie     *  5: Access-Control-Allow-Headers 请求头:     *      (1): X-Requested-With 请求头用于在服务器端判断request来自AJAX请求还是传统请求;     **/    @Override    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)            throws IOException, ServletException {        // TODO 解决跨域错误        // 接收参数        HttpServletRequest request = (HttpServletRequest) req;        System.out.println("请求编码=="+request.getCharacterEncoding());        //if( request.getCharacterEncoding() == null ){            request.setCharacterEncoding("UTF-8");        //}        System.out.println("请求地址=="+request.getRequestURL());        System.out.println("请求参数"+ HttpUtil.getReceiveMap(request));                // 返回参数        HttpServletResponse response = (HttpServletResponse) resp;        //保证输出到浏览器不会乱码,为JSON格式        response.setContentType("application/json;charset=utf-8");        response.setCharacterEncoding("UTF-8");        response.setHeader("Access-Control-Allow-Credentials", "true");        response.setHeader("Access-Control-Allow-Headers", "X-Requested-With");        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");        response.setHeader("Access-Control-Allow-Origin", "*");        response.setHeader("Access-Control-Max-Age", "600");        chain.doFilter(request, response);    }    @Override    public void destroy() {        // TODO Auto-generated method stub            }        }

当请求编码为NULL时,我们给他SET进UTF-8,这样Spring在解析的时候就会正常了,测试已经通过了,因为乱码问题只会在文件上传的时候出现, 先前一直以为是AJAX传值序列化那块的问题(小白一枚),找了好久,才发现是后台接收出错(汗颜);