实现HttpServlet，接收get，和post请求

爱被打了一巴掌 2021-11-01 17:32 446阅读 0赞

## 实现HttpServlet，接收get，和post（json）请求 ##

## servlet实现 ##

/**
     * Servlet路径配置
     */
    
    @WebServlet("/demo4")
    public class ServletDemo4 extends HttpServlet {
        @Override
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            System.out.println("demo4..get请求.");
    
            request.setCharacterEncoding("utf-8");
            request.setAttribute("contentType","application/json; charset=utf-8");
    
            String name = request.getParameter("name");
            String age = request.getParameter("age");
            System.out.println("name:" + name + ",age:" + age);
    
            response.setCharacterEncoding("utf-8");
            response.getWriter().print("name:" + name + ",age:" + age +"-----:");
        }
    
        @Override
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            System.out.println("demo4..post请求.");
    
            //读取响应
            BufferedReader reader = new BufferedReader(new InputStreamReader(request.getInputStream()));
            String lines;
            StringBuffer sb = new StringBuffer("");
            while ((lines = reader.readLine()) != null) {
                lines = new String(lines.getBytes(), "utf-8");
                sb.append(lines);
            }
            System.out.println(sb);
    
            response.setCharacterEncoding("utf-8");
            response.getWriter().print(sb.toString());
        }
    }

### 发送请求 ###

1.get请求   http://localhost:8181/14/user/demo4?name=jack得到&age=12
    2.post （json数据）请求 		{"name":"jjlkk框架","age":"1122"}

#### 发送post请求问题 ####

1. 	发送普通的Text类型数据
    		使用servlet 来接收 String name = request.getParameter("name"); 即可；

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NodWFuX3poYW5nX2Fr_size_16_color_FFFFFF_t_70]

2. 	发送json类型数据，注意发送的为json修改类型
    		需要使用 request.getInputStream() 流来获取

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NodWFuX3poYW5nX2Fr_size_16_color_FFFFFF_t_70 1]

--------------------

如有误：请指点，多谢。

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