Ways to submit data to the back-end summary

Implementation of the web page to submit data to the background there are many, what do the following summary

1. Submit the form by form

Form submission form is a very common way to pass the background value by the action attribute of the form can pass values ​​to the background servlet

<form action="UpdateServlet" method="post" >
	编号:<input type="text" name="id" value="${user.id}" readonly=" readonly"  /><br/>
	姓名:<input type="text" name="name" value="${user.name }"  /> <br/>
	性别:<input type="text" name="sex" value="${user.sex }"  /> <br/>
	年龄:<input type="text" name="age" value="${user.age }"  /> <br/>
	<input type="submit" value="更新" />
</form>

2. traditional values ​​ajax

Ajax in the data set may be a value, then the reception in the background example:

$.ajax({
			  type: 'POST',
			  url: 'TestJsonServlet',
			   data: {"id":id,"name":name,"password":password}, //这个data是要往后台传递的data
			  
			  dataType:"json",
			  success: function(data,msg){ //这个data 是服务器返回的数据
				 	
				  show(data.data); //第一个data是参数data ,第二个data是返回的 json 数据的名字 data
			  },
			  error:function(xhr,errorMsg,error){
				  alert(xhr.status);
				  console.log(xhr.status);
				  alert(errorMsg);
			  }
			});

3. Crossing value href: href attribute set by <a> js tag or pass the link address set to a value in the following format:

<td>
    <a href="UpdateServlet?id=${user.id }">更新</a>
    <a href="DeleteServlet?id=${user.id }">删除</a>
</td>		

4. By jumping servlet to servlet achieve transmission values:

First of all incoming values ​​to UpdateServlet id, the id is updated based on the value of

UpdateServlet?id=${user.id }

Then at UpdateServlet operation based on the value of the id, the last hop in the ShowServlet UpdateServlet, the value of the updated display

request.getRequestDispatcher("ShowServlet").forward(request, response);

5. directly in the address bar of your browser?-After-write value to achieve their goals to pass the background values

http://localhost:8080/servlet/TestServlet?id=1&name=wang