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  • java如何得到GET和POST请求URL和参数列表(转)

    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.zuidaima                        
    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);
        }
    }
    
          
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  • 原文地址:https://www.cnblogs.com/GarfieldTom/p/5100916.html
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