Java 如何使用ajax将数据发送到servlet而无需提交表单
我是servlet新手,我可以从servlet获取数据,但无法向它发送数据,我想在不使用提交表单的情况下执行此操作,我可以获得一些帮助吗 单击按钮,它将转到servlet并返回文本,但不返回发送给它的值 这是我的index.jspJava 如何使用ajax将数据发送到servlet而无需提交表单,java,ajax,jsp,servlets,Java,Ajax,Jsp,Servlets,我是servlet新手,我可以从servlet获取数据,但无法向它发送数据,我想在不使用提交表单的情况下执行此操作,我可以获得一些帮助吗 单击按钮,它将转到servlet并返回文本,但不返回发送给它的值 这是我的index.jsp <!DOCTYPE html> <html lang="en"> <head> <title>SO question 4112686</title> <script src="http:
<!DOCTYPE html>
<html lang="en">
<head>
<title>SO question 4112686</title>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script>
$(document).ready(function() {
$('#somebutton').click(function() {
$.get('GetUserServlet', function(responseText) {
$('#somediv').text(responseText);
});
});
});
$("#somebutton").click(function(){
$.ajax
(
{
url:'GetUserServlet',
data:{name:'abc'},
type:'get',
cache:false,
success:function(data){alert(data);},
error:function(){alert('error');}
}
);
}
);
</script>
</head>
<body>
<button id="somebutton" onclick="showHint('GetUserServlet.java', 'travis');">press here</button>
<div id="somediv"></div>
</body>
为此,您可以使用$.post方法。
这是我的解决方案
index.jsp
<!DOCTYPE html><html lang="en">
<head>
<title>SO question 4112686</title>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script>
$(document).ready(function() {
$("#somebutton").click(function() {
servletCall();
});
});
function servletCall() {
$.post(
"GetUserServlet",
{name : "Message from jsp"}, //meaasge you want to send
function(result) {
$('#somediv').html('Here is your result : <strong>' + result + '</strong>'); //message you want to show
});
};
</script>
</head>
<body>
<button id="somebutton">press here</button>
<div id="somediv"></div>
</body>
</html>
所以问题4112686
$(文档).ready(函数(){
$(“#somebutton”)。单击(函数(){
servletCall();
});
});
函数servletCall(){
美元邮政(
“GetUserServlet”,
{name:“来自jsp的消息”},//要发送的消息
功能(结果){
$('#somediv').html('这是您的结果:'+result+'');//要显示的消息
});
};
按这里
GetUserServlet.java
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;
public class GetUserServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String text = "<br>Message from servlet<br>"; //message you will recieve
String name = request.getParameter("name");
PrintWriter out = response.getWriter();
out.println(text + name);
}
}
import java.io.IOException;
导入java.io.PrintWriter;
导入javax.servlet.*;
导入javax.servlet.http.*;
公共类GetUserServlet扩展了HttpServlet{
public void doGet(HttpServletRequest请求、HttpServletResponse响应)
抛出ServletException、IOException{
doPost(请求、响应);
}
public void doPost(HttpServletRequest请求、HttpServletResponse响应)
抛出ServletException、IOException{
String text=“
来自servlet的消息
”;//您将收到的消息
字符串名称=request.getParameter(“名称”);
PrintWriter out=response.getWriter();
out.println(文本+名称);
}
}
您可以在此处使用$.ajax()或$.post。因为您使用了$.ajax()。请参阅以下更正:
<!DOCTYPE html>
<html lang="en">
<head>
<title>SO question 4112686</title>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script>
$(document).ready(function() {
$('#somebutton').click(function() {
$.get('GetUserServlet', function(responseText) {
$('#somediv').text(responseText);
});
});
});
$("#somebutton").click(function(){
$.ajax({
url:'GetUserServlet',
data:{name:'abc'},
type:'get',
cache:false,
success:function(data){
alert(data);
$('#somediv').text(responseText);
},
error:function(){
alert('error');
}
}
);
}
);
</script>
</head>
<body>
<button id="somebutton">press here</button>
<div id="somediv"> </div>
</body>
以前从未使用过它,但我愿意再看一眼,你已经是:)那些$是jQuery调用。所以您已经在使用jQuery.ajax()函数了。让我看一下我现有的ajax/servlet交互,记住它们是如何工作的:)
<!DOCTYPE html>
<html lang="en">
<head>
<title>SO question 4112686</title>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script>
$(document).ready(function() {
$('#somebutton').click(function() {
$.get('GetUserServlet', function(responseText) {
$('#somediv').text(responseText);
});
});
});
$("#somebutton").click(function(){
$.ajax({
url:'GetUserServlet',
data:{name:'abc'},
type:'get',
cache:false,
success:function(data){
alert(data);
$('#somediv').text(responseText);
},
error:function(){
alert('error');
}
}
);
}
);
</script>
</head>
<body>
<button id="somebutton">press here</button>
<div id="somediv"> </div>
</body>
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;
public class GetUserServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String text = "Update successfull"; //message you will recieve
String name = request.getParameter("name");
PrintWriter out = response.getWriter();
out.println(name + " " + text);
}