Applets are not micro-channel data with interactive java background post pit

First, the first micro-channel applet code is posted request:

We only pass a parameter, use post requests

  wx.request({
      url: 'http://127.0.0.1:8080/provider/demo',
      data: {
        MemberID: 1,    //用户编号                
      },
      method: 'post',
      dataType: 'json',
      success: function (res) {
        console.log(res)
      }
    })

java side code, optionally one of two kinds:

This is not to use the framework servlet:

@WebServlet("/index")
public class index extends HttpServlet {
    public index() {
        super();
    }
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html;charset=utf-8");          
        /* 设置响应头允许ajax跨域访问 */  
        response.setHeader("Access-Control-Allow-Origin", "*");  
        /* 星号表示所有的异域请求都可以接受， */  
        response.setHeader("Access-Control-Allow-Methods", "GET,POST");  
        //获取微信小程序get的参数值并打印
        String memberID = request.getParameter("MemberID");
        System.out.println("memberID="+memberID);
        //返回值给微信小程序
        Writer out = response.getWriter(); 
        out.write("进入后台了");
        out.flush(); 
	}

}

This is done using java end frame springboot

@RestController
public class providerdemo {

	@RequestMapping("provider/demo")
	public String demo(HttpServletRequest request, HttpServletResponse response) {
		response.setContentType("text/html;charset=utf-8");          
        /* 设置响应头允许ajax跨域访问 */  
        response.setHeader("Access-Control-Allow-Origin", "*");  
        /* 星号表示所有的异域请求都可以接受， */  
        response.setHeader("Access-Control-Allow-Methods", "GET,POST");  
       
        String memberID = request.getParameter("MemberID");
        System.out.println("memberID="+memberID);
        
		return "provider success!";
	}
}

But how we can not get this argument, but it can return the correct data, which shows a small parameter in the micro-channel program over there did not pass over.

Search for a long data and found that the request from the post instead get way you can get the parameters.

I have to use post request to obtain the parameters?

Then you need to add request header, as follows:

 wx.request({
      url: 'http://127.0.0.1:8080/provider/demo',
      data: {
        MemberID: 1,    //用户编号                
      },
      method: 'post',
      dataType: 'json',
      header: { 'content-type': 'application/x-www-form-urlencoded' },
      success: function (res) {
        console.log(res.data)
        
      }
    })

Java background so you can get there a parameter.