Ajax-java中的ajax使用，以及编码问题-优快云博客

本文介绍了一个使用Ajax进行GET请求的示例，并展示了如何在Java Servlet中接收并处理请求参数。示例包括JavaScript代码用于发送请求及servlet代码用于设置字符编码并获取参数。

结合Ajax类使用：http://www.cnblogs.com/hfultrastrong/p/7267171.html

javascript代码：

<script type="text/javascript" src="js/AjaxRequest.js"></script> 

<script type="text/javascript">
	var xhr = Ajax();
	
	var url = "IsExistUserAjaxServlet";
	var params = "name=张三&age=12&sex=woman";
	
	/* GET */
	var des_url_get = url + "?nocache=" + new Date().getTime() + "&" + params;
	xhr.get(des_url_get, function(data) {
		console.log(data);
	});
	
	
	/* POST*/
	/* var des_url_post = url + "?nocache=" + new Date().getTime();
	xhr.post(des_url_post, params, function(data) {
		console.log(data);
	}); */
</script>

servlet代码：

一定要设置编码，这对于使用中文的数据很重要。

request.setCharacterEncoding("UTF-8");
response.setContentType("text/text;charset=utf-8");

package com.gordon.servlet;

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(name = "IsExistUserAjaxServlet", urlPatterns = { "/IsExistUserAjaxServlet" })
public class IsExistUserAjaxServlet extends HttpServlet {
	
	private static final long serialVersionUID = 1L;

	public IsExistUserAjaxServlet() {
		super();
	}

	public void init(ServletConfig config) throws ServletException {
	}

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/text;charset=utf-8");

		String name = request.getParameter("name");
		String sex = request.getParameter("sex");
		int age = Integer.valueOf(request.getParameter("age"));

		System.out.println(name + ", " + sex + ", " + age);

		response.getWriter().println("name:" + name + "age:" + age + "sex:" + sex);
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}
}