SSH 获取GET/POST参数

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在做项目的API通知接口的时候，发现在SSH框架中无法获取到对方服务器发来的异步通知信息。
最后排查到的原因可能是struts2对HttpServletRequest进行了二次处理，那么该如何拿到post的请求数据呢，方法很多，下面只给出一种方式。

在servlet中GET请求可以通过HttpServletRequest的getRequestURL方法和getQueryString()得到完整的请求路径和请求所有参数列表，

POST的需要getParameterMap()方法遍历得到，不论GET或POST都可以通过 getRequestURL+getParameterMap()来得到请求完整路径。

package com.xxx

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Map;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class GetParams extends HttpServlet {

    private static final long serialVersionUID = 1L;

    public GetParams() {

        super();

    }

    protected void doGet(HttpServletRequest request,

            HttpServletResponse response) throws ServletException, IOException {

        PrintWriter writer = response.getWriter();

        writer.println("GET " + request.getRequestURL() + " "

                + request.getQueryString());

        Map<String, String[]> params = request.getParameterMap();

        String queryString = "";

        for (String key : params.keySet()) {

            String[] values = params.get(key);

            for (int i = 0; i < values.length; i++) {

                String value = values[i];

                queryString += key + "=" + value + "&";

            }

        }

        // 去掉最后一个空格

        queryString = queryString.substring(0, queryString.length() - 1);

        writer.println("GET " + request.getRequestURL() + " " + queryString);

    }

    protected void doPost(HttpServletRequest request,

            HttpServletResponse response) throws ServletException, IOException {

        PrintWriter writer = response.getWriter();

        Map<String, String[]> params = request.getParameterMap();

        String queryString = "";

        for (String key : params.keySet()) {

            String[] values = params.get(key);

            for (int i = 0; i < values.length; i++) {

                String value = values[i];

                queryString += key + "=" + value + "&";

            }

        }

        // 去掉最后一个空格

        queryString = queryString.substring(0, queryString.length() - 1);

        writer.println("POST " + request.getRequestURL() + " " + queryString);

    }

}

根据上面的代码，稍微改动一下，实现如下：

　　/**

     * 获取POST数据,不支持数组形式数据,一般使用场景是对方使用POST方式传递数据过来

     * TODO 待完善

     * @author phpdragon

     * @date 2014-12-24 下午3:45:22

     * @return

     * @description :

     * @return Map<String,String>

     * @throws

     */

    @SuppressWarnings("unchecked")

    private static Map<String, String> getPostData() {

        Map<String, String> param = new HashMap<String, String>();

        HttpServletRequest request = ServletActionContext.getRequest();

        Map<String, String[]> params = request.getParameterMap();

        for (String key : params.keySet()) {

            String[] values = params.get(key);

            for (int i = 0; i < values.length; i++) {

                param.put(key, values[i]);

            }

        }

        return param;

    }