解析跨域请求request+响应

package com.zichen.xhkq.controller.login;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.alibaba.fastjson.JSONObject;
import com.zichen.xhkq.exception.CustomException;
import com.zichen.xhkq.util.request.RequestAnalysisUtil;

@Controller
@RequestMapping("/testController")
public class TestController {
	private static Logger log = LoggerFactory.getLogger(TestController.class);

	/**
	 * 响应
	 * 
	 * @param response
	 * @param outputStr
	 */
	private void doResponse(HttpServletResponse response, String outputStr) {
		response.setContentType("application/json");
		PrintWriter out = null;
		try {
			out = response.getWriter();
			out.write(outputStr);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			out.flush();
			out.close();
		}
	}

	@RequestMapping("/testMy")
	public void testMy(HttpServletRequest request, HttpServletResponse response)
			throws CustomException, UnsupportedEncodingException {

		// 1.入参解析打印
		try {
			JSONObject requestJsonObj = RequestAnalysisUtil
					.parseRequest2JsonObject(request);
			log.info("testMy|requestJsonObj={}", requestJsonObj);

			String passWord = requestJsonObj.getString("passWord");// 交易信息
			log.debug("passWord={}", passWord);

			responseSuccess(response, requestJsonObj);
		} catch (Exception e) {

			responseField(response, e);
		}

	}

	private void responseField(HttpServletResponse response, Exception e) {
		log.error("testMy|系统异常e={}", e);
		JSONObject jsonObject = new JSONObject();
		jsonObject.put("code", "-1");
		jsonObject.put("result", e);
		jsonObject.put("messages", "系统异常");
		doResponse(response, jsonObject.toJSONString());
	}

	private void responseSuccess(HttpServletResponse response,
			Object requestJsonObj) {
		JSONObject jsonObject = new JSONObject();
		jsonObject.put("code", "000000");
		jsonObject.put("result", requestJsonObj);
		jsonObject.put("messages", "成功了！");
		doResponse(response, jsonObject.toJSONString());
	}

}

package com.zichen.xhkq.util.request;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import com.alibaba.fastjson.JSONObject;
import com.zichen.xhkq.dict.xhPay.Dict_xhPay_encoding;

public class RequestAnalysisUtil {

	/**
	 * parse Request 2 JsonObject
	 * 
	 * @param jsonStr
	 * @return
	 * @throws Exception
	 */
	public static JSONObject parseRequest2JsonObject(HttpServletRequest request)
			throws Exception {

		JSONObject jsonObject = new JSONObject();
		// 判断请求method,从request获取参数
		String httpMehtod = request.getMethod();

		// GET请求
		if (httpMehtod.equals("GET")) {
			String requestJsonString = new String(request.getQueryString()
					.getBytes("UTF-8"), "utf-8").replaceAll("%22", "\"")
					.replaceAll("%7B", "{").replaceAll("%7D", "}");

			// 将get参数转为map,转为json
			Map<String, String> notifyMap = parseString2Map(requestJsonString);

			jsonObject = JSONObject.parseObject(JSONObject
					.toJSONString(notifyMap));

		} else if (httpMehtod.equals("POST")) {

			String requestJsonString = parseHttpRequest(request,
					Dict_xhPay_encoding.XHPAY_ENCODING_UTF8);

			jsonObject = JSONObject.parseObject(requestJsonString);

		} else {
			throw new Exception("请求方法解析异常");
		}
		return jsonObject;
	}

	/**
	 * string parse 2 MapString
	 * 
	 * @description 以&分割，key=value格式
	 * @author CNZZ
	 * @time 2019-1-5
	 * @param str
	 * @return
	 */
	public static Map<String, String> parseString2Map(String str) {

		Map<String, String> map = new HashMap<String, String>();
		String[] array = str.split("&");
		for (int i = 0; i < array.length; i++) {
			String[] data = array[i].split("=");
			map.put(data[0], data[1]);
		}
		return map;
	}

	/**
	 * 读取请求题内容
	 * 
	 * @param request
	 * @return
	 * @throws Exception
	 */
	public static String parseHttpRequest(HttpServletRequest request,
			String encoding) throws Exception {
		// 请求原文
		StringBuffer sb = new StringBuffer();
		BufferedReader br = null;
		try {
			br = new BufferedReader(new InputStreamReader(
					request.getInputStream(), encoding));
			String str = null;
			while ((str = br.readLine()) != null || " ".equals(str)) {
				sb.append(str);
			}
		} catch (IOException e) {
			throw new IOException(e);
		} finally {
			if (br != null) {
				try {
					br.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		String resultStr = sb.toString();
		return resultStr;
	}
}