原生js封装ajax _电脑

AJAX即“Asynchronous Javascript And XML”（异步JavaScript和XML），是一种用于建立快速动态网页的手艺。
原生js实现ajax功能本家儿要依靠于window.XMLHttpRequest（非IE浏览器利用）和window.ActiveXObject（IE浏览器利用）来标的目的后台发送请求。

需要这些哦
电脑
myeclipse或者eclipse
第一
：新加一个javaweb项目1第一步：利用myeclipse新建javaweb项目。
打开myeclipse file --》new--》web project
具体操作如下图所示：

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2第二步：编写servlet 。
package com.test.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class TestServlet exts HttpServlet {
private static final long serialVersionUID = 5181663133516569754L;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
}

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3第三步：在web中设置装备摆设servlet 。

<servlet>
<servlet-name>testServlet</servlet-name>
<servlet-class>com.test.servlet.TestServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>testServlet</servlet-name>
<url-pattern>/testServlet.do</url-pattern>
</servlet-mapping>

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第二
：编写测试功能代码1第一步：编写servlet营业代码。
package com.test.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class TestServlet exts HttpServlet {
private static final long serialVersionUID = 5181663133516569754L;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 避免呈现乱码的问题
response.setContentType("application/json;charset=utf-8");
request.setCharacterEncoding("UTF-8");
String id = request.getParameter("id");
String name = request.getParameter("name");
String sex = request.getParameter("sex");
String json = "{'id':" + id + ",'name':'" + name + "','sex':'" + sex
+ "'}";
response.getWriter().print(json);
}