JAVA跨域問題，解決方案

<code>package com.example.test.demo;


import org.apache.commons.lang.StringUtils;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @Description 用於解決跨域問題
 **/
public class AllowOriginFilter implements Filter {


    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // TODO 其他處理
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        String origin = request.getHeader("Origin");
        if (StringUtils.isNotBlank(origin)) {
            //設置響應頭，允許跨域訪問
            //帶cookie請求時，必須為全匹配，不能使用*
            /**
             * 表示允許 origin 發起跨域請求。
             */
            response.addHeader("Access-Control-Allow-Origin", origin);
        }

        /**
         * GET,POST,OPTIONS，PUT,DELETE 表示允許跨域請求的方法
         */
        response.addHeader("Access-Control-Allow-Methods", "GET, POST, OPTIONS, PUT, DELETE");

        /**
         * 表示在86400秒內不需要再發送預校驗請求
         */
        response.addHeader("Access-Control-Max-Age", "86400");

        //支持所有自定義頭
        String headers = request.getHeader("Access-Control-Request-Headers");
        if (StringUtils.isNotBlank(headers)) {
            //允許JSON請求，並進行預檢命令緩存
            response.addHeader("Access-Control-Allow-Headers", headers);
        }

        response.addHeader("Access-Control-Max-Age", "3600");

        //允許cookie
        response.addHeader("Access-Control-Allow-Credentials", "true");
        filterChain.doFilter(servletRequest, response);
    }

    @Override
    public void destroy() {
        // TODO 其他處理
    }
}

/<code>

<code> @CrossOrigin
    @RequestMapping(value = "/login",method = RequestMethod.POST)
public  String Hell( String name, String pwd){

        return "請求成功";

}/<code>

引用commons-lang

<code> <dependency>
            <groupid>commons-lang/<groupid>
            <artifactid>commons-lang/<artifactid>
            <version>2.6/<version>
        /<dependency>/<code>

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關鍵字: 跨域 JSON Origin