访问servlet中的JSONObject时出错
当我试图在servlet中访问JSONObject时，我的项目中出现以下错误 我的servlet代码是访问servlet中的JSONObject时出错,json,object,servlets,lifecycle,catalina,Json,Object,Servlets,Lifecycle,Catalina,当我试图在servlet中访问JSONObject时，我的项目中出现以下错误 我的servlet代码是 package org.java.test; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServ
package org.java.test;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
@WebServlet("/HelloWorld")
public class HelloWorld extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public HelloWorld() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String username = request.getParameter("usernameTxt");
String password = request.getParameter("passwordTxt");
response.setContentType("application/json");
PrintWriter out = response.getWriter();
JSONObject obj = new JSONObject();
try {
obj.put("name", "foo");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
out.print(obj);
out.flush();
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.getWriter().println("HelloWorld");
}
}
<html>
<head>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<script type="text/javascript" >
$(function(){
$("#submitBtn").click(function(){
var inputdata = {
usernameTxt : $("#usernameTxt").val() ,
passwordTxt: $("#passwordTxt").val()
};
$.ajax( {
url : 'HelloWorld',
type : 'GET',
data : inputdata,
dataType : 'json',
success: function(data) {
$('#hi').text(data.username);
$('#hi2').text(data.password);
}
});
});
});
</script>
</head>
<body>
<input type="text" id="usernameTxt" placeholder="Username" > <br/>
<input type="text" id="passwordTxt" placeholder="Password" > <br/>
<input type="button" id="submitBtn" value="Login" > <br/>
<div id="hi"></div>
<div id="hi2"></div>
</body>
</html>
$（函数（）{
$（“#submitBtn”）。单击（函数（）{
变量输入数据={
usernameTxt:$（“#usernameTxt”）.val（），
passwordTxt:$（“#passwordTxt”）.val（）
};
$.ajax（{
url:“HelloWorld”，
键入：“GET”，
数据：输入数据，
数据类型：“json”，
成功：功能（数据）{
$（'#hi'）.text（data.username）；
$（'#hi2'）.text（data.password）；
}
});
});
});
我已经添加了
Commons-logging-1.1.1.jar。