SpringMVC 解決跨域和亂碼問題2

在上次說到跨域中解決亂碼問題,只是在攔截器中set編碼格式,顯然在接下來的項目中又遇到了新的問題:

在文件上傳的過程當中,和其一塊過來的數據會發生中文亂碼;在百度上扒拉了很久,才曉得是在文件上傳的過程當中,編碼格式是不會隨HTTP請求一塊過來的,因此我修改了中間器,代碼以下:

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 跨域解決類
 *@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
        
    }
    
    /**
     *  請求頭註釋:
     *  0: response.setContentType 設置響應格式;
     *  0: response.setCharacterEncoding("UTF-8"); 設置響應參數爲UTF-8
     *  1: Access-Control-Allow-Origin 能夠請求的域; *爲容許全部域請求
     *  2: Access-Control-Allow-Methods 請求方式
     *  3: Access-Control-Max-Age  請求數據緩存時間(單位秒)
     *  4: Access-Control-Allow-Credentials 保持跨域 AJAX時的 Cookie
     *  5: Access-Control-Allow-Headers 請求頭:
     *      (1): X-Requested-With 請求頭用於在服務器端判斷request來自AJAX請求仍是傳統請求;
     **/
    @Override
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
            throws IOException, ServletException {
        // TODO 解決跨域錯誤
        // 接收參數
        HttpServletRequest request = (HttpServletRequest) req;
        System.out.println("請求編碼=="+request.getCharacterEncoding());
        //if( request.getCharacterEncoding() == null ){
            request.setCharacterEncoding("UTF-8");
        //}
        System.out.println("請求地址=="+request.getRequestURL());
        System.out.println("請求參數"+ HttpUtil.getReceiveMap(request));
        
        // 返回參數
        HttpServletResponse response = (HttpServletResponse) resp;
        //保證輸出到瀏覽器不會亂碼,爲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
        
    }

    
    
}

當請求編碼爲NULL時,咱們給他SET進UTF-8,這樣Spring在解析的時候就會正常了,測試已經經過了,由於亂碼問題只會在文件上傳的時候出現, 先前一直覺得是AJAX傳值序列化那塊的問題(小白一枚),找了很久,才發現是後臺接收出錯(汗顏);