Javascript Java servlet赢得';不能使用AWS Java SDK
我有一个用JS编写的网页,有几个文本字段和几个按钮。页面是Javascript,使用JQuery,我还有一个Javaservlet。我已经将按钮连接到servlet,当通过Eclipse部署到Elastic Beanstalk时,一切都可以正常工作。。。直到我在servlet中实例化一个AmazonS3对象。然后,除了调用实例化S3对象的函数的按钮外,其他一切都正常工作。我点击它,它什么也不做,包括在实例化之前运行代码。当我对Amazon行进行评论时,它运行良好 我错过了什么 这是我的档案: index.jspJavascript Java servlet赢得';不能使用AWS Java SDK,javascript,amazon-web-services,servlets,Javascript,Amazon Web Services,Servlets,我有一个用JS编写的网页,有几个文本字段和几个按钮。页面是Javascript,使用JQuery,我还有一个Javaservlet。我已经将按钮连接到servlet,当通过Eclipse部署到Elastic Beanstalk时,一切都可以正常工作。。。直到我在servlet中实例化一个AmazonS3对象。然后,除了调用实例化S3对象的函数的按钮外,其他一切都正常工作。我点击它,它什么也不做,包括在实例化之前运行代码。当我对Amazon行进行评论时,它运行良好 我错过了什么 这是我的档案: i
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Program 4</title>
<script type="text/javascript" src ="js/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$('#bttLoad').click(function(){
$.ajax({
type:'POST',
data: {
action: 'load'
},
url:'AjaxController',
success: function(result){
$('#loadResult').html(result);
}
});
});
$('#bttClear').click(function(){
$.ajax({
type:'POST',
data: {
action: 'clear'
},
url:'AjaxController',
success: function(result){
$('#clearResult').html(result);
}
});
});
$('#bttQuery').click(function(){
var firstName = $('#firstName').val();
var lastName = $('#lastName').val();
$.ajax({
type:'POST',
data: {
firstName: firstName,
lastName: lastName,
action: 'query'
},
url:'AjaxController',
success: function(result){
$('#queryResult').html(result);
}
});
});
});
</script>
</head>
<body>
<fieldset>
<form>
<input type="button" value="Load Data" id ="bttLoad">
<br>
<span id="loadResult"></span>
</form>
</fieldset>
<fieldset>
<form>
<input type="button" value="Clear Data" id ="bttClear">
<br>
<span id="clearResult"></span>
</form>
</fieldset>
<fieldset>
<form>
First Name <input type="text" id="firstName">
Last Name <input type="text" id="lastName">
<input type="button" value="Query" id ="bttQuery">
<br>
<span id="queryResult"></span>
</form>
</fieldset>
</body>
</html>
方案4
$(文档).ready(函数(){
$('#bttLoad')。单击(函数(){
$.ajax({
类型:'POST',
数据:{
动作:“加载”
},
url:'AjaxController',
成功:功能(结果){
$('#loadResult').html(结果);
}
});
});
$('#bttClear')。单击(函数(){
$.ajax({
类型:'POST',
数据:{
行动:“清除”
},
url:'AjaxController',
成功:功能(结果){
$('#clearResult').html(结果);
}
});
});
$('#bttQuery')。单击(函数(){
var firstName=$('#firstName').val();
var lastName=$('#lastName').val();
$.ajax({
类型:'POST',
数据:{
名字:名字,
lastName:lastName,
操作:“查询”
},
url:'AjaxController',
成功:功能(结果){
$('#queryResult').html(结果);
}
});
});
});
名字
姓
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>program4</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<description></description>
<display-name>AjaxController</display-name>
<servlet-name>AjaxController</servlet-name>
<servlet-class>controller.AjaxController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>AjaxController</servlet-name>
<url-pattern>/AjaxController</url-pattern>
</servlet-mapping>
</web-app>
方案4
index.jsp
AjaxController
AjaxController
controller.AjaxController
AjaxController
/AjaxController
最后是AjaxController.java(servlet)
包装控制器;
导入java.io.IOException;
导入java.io.PrintWriter;
导入javax.servlet.ServletException;
导入javax.servlet.http.HttpServlet;
导入javax.servlet.http.HttpServletRequest;
导入javax.servlet.http.HttpServletResponse;
导入com.amazonaws.services.s3.AmazonS3;
导入com.amazonaws.services.s3.AmazonS3ClientBuilder;
/**
*Servlet实现类AjaxController
*/
公共类AjaxController扩展HttpServlet{
私有静态最终长serialVersionUID=1L;
/**
*@参见HttpServlet#HttpServlet()
*/
公共控制器(){
超级();
//TODO自动生成的构造函数存根
}
/**
*@参见HttpServlet#doGet(HttpServletRequest请求,HttpServletResponse响应)
*/
受保护的void doGet(HttpServletRequest请求,HttpServletResponse响应)抛出ServletException,IOException{
//TODO自动生成的方法存根
response.getWriter().append(“服务于:”).append(request.getContextPath());
}
/**
*@请参阅HttpServlet#doPost(HttpServletRequest请求,HttpServletResponse响应)
*/
受保护的void doPost(HttpServletRequest请求、HttpServletResponse响应)引发ServletException、IOException{
response.setContentType(“文本/普通”);
PrintWriter out=response.getWriter();
String action=request.getParameter(“action”);
if(action.contentEquals(“load”)){
//字符串fullname=request.getParameter(“fullname”);
out.println(“加载”);
}
else if(action.contentEquals(“clear”)){
out.println(“清除”);
myfunc(答复);
/*
int number1=Integer.parseInt(request.getParameter(“number1”);
int number2=Integer.parseInt(request.getParameter(“number2”);
out.println(1号+2号);
myfunc(答复);
*/
}
else if(action.contentEquals(“查询”)){
//执行查询
println(“我们将进行da查询,周一”);
String firstName=request.getParameter(“firstName”);
字符串lastName=request.getParameter(“lastName”);
out.println(firstName+“”+lastName);
}
//doGet(请求、响应);
}
公共静态void myfunc(HttpServletResponse响应)引发IOException{
PrintWriter out=response.getWriter();
对于(int i=0;i<100;i++){
out.println(i);
}
AmazonS3 s3=AmazonS3ClientBuilder.standard().build();
}
}
找到了解决方案
事实证明,AWS SDK没有被上传到Elastic Beanstalk,即使我已经将jar添加到我的项目中(我没有使用Maven)
我要做的是
首先,将jar拖放到Eclipse中我的项目中的WebContent文件夹WEB-INF lib中
其次,右键单击项目并转到buildpath,配置buildpath。在打开的窗口中,选择顶部的“库”选项卡。右边有几个按钮。其中之一是添加外部jar,我之前已经这样做了,将AWS SDK jar添加到我的项目中。但我也不得不点击添加罐子。在弹出的窗口中,导航到前面提到的lib文件夹并从这里添加jar
一旦我这样做并重新部署到Elastic Beanstalk,调用包含AWS代码的函数的按钮现在就可以工作了 共享堆栈跟踪
package controller;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
/**
* Servlet implementation class AjaxController
*/
public class AjaxController extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public AjaxController() {
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
response.getWriter().append("Served at: ").append(request.getContextPath());
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/plain");
PrintWriter out = response.getWriter();
String action = request.getParameter("action");
if (action.contentEquals("load")) {
//String fullname = request.getParameter("fullname");
out.println("load");
}
else if (action.contentEquals("clear")) {
out.println("clear");
myfunc(response);
/*
int number1 = Integer.parseInt(request.getParameter("number1"));
int number2 = Integer.parseInt(request.getParameter("number2"));
out.println(number1 + number2);
myfunc(response);
*/
}
else if (action.contentEquals("query")) {
//perform the query
out.println("we gonna do da query, mon");
String firstName = request.getParameter("firstName");
String lastName = request.getParameter("lastName");
out.println(firstName + " " + lastName);
}
//doGet(request, response);
}
public static void myfunc(HttpServletResponse response) throws IOException {
PrintWriter out = response.getWriter();
for (int i = 0; i < 100; i++) {
out.println(i);
}
AmazonS3 s3 = AmazonS3ClientBuilder.standard().build();
}
}