SpringMVC 解决跨域和乱码问题2

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:

在文件上传的过程当中,和其一块过来的数据会发生中文乱码;在百度上扒拉了很久,才晓得是在文件上传的过程当中,编码格式是不会随HTTP请求一块过来的,因此我修改了中间器,代码以下:

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 能够请求的域; *为容许全部域请求
     *  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请求仍是传统请求;
     **/
    @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,咱们给他SET进UTF-8,这样Spring在解析的时候就会正常了,测试已经经过了,由于乱码问题只会在文件上传的时候出现, 先前一直觉得是AJAX传值序列化那块的问题(小白一枚),找了很久,才发现是后台接收出错(汗颜);