本文共 2429 字，大约阅读时间需要 8 分钟。

package maven_weather;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import net.sf.json.JSONArray;/** * Servlet implementation class testServelt */public class testServelt extends HttpServlet {	private static final long serialVersionUID = 1L;           /**     * @see HttpServlet#HttpServlet()     */    public testServelt() {        super();        // TODO Auto-generated constructor stub    }	/**	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)	 */	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {		System.out.println("接受请求成功！");		System.out.println("定义一个数组，存放数据！");				String callbacka=request.getParameter("callbackfun");		System.out.println("回调函数的名字："+callbacka);		//		这里自己定义一个数组，提供测试		ArrayList
   
     peopleList=new ArrayList
    
     ();		peopleList.add("1230");		peopleList.add("189");		peopleList.add("456");		peopleList.add("0000");//		System.out.print("遍历这个peopelList数组：");//		for(String l:peopleList){//			System.out.print(l+" ");//		}//		System.out.println();//		System.out.println("=========================");		//		将数组转换成json格式，然后再交给回调函数，		System.out.println("将数组转换成json格式：");		JSONArray jArray = JSONArray.fromObject(peopleList);		System.out.println(jArray);				PrintWriter writer=response.getWriter();		String s = "{\"images\": "+jArray+"}";		if(callbacka==null){			s=s;		}else{			s=callbacka+"("+s+")";		}		response.getWriter().write(s);		}	/**	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)	 */	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {		// TODO Auto-generated method stub		doGet(request, response);	}}
    
   

二，html代码

/*  向后端发送请求  */  btnPost:function(){    var url="http://localhost:8080/maven/testServelt"    wx.request({      url: url,      // jsonp: 'callbackfun',//传递给请求处理程序或页面的，用以获得jsonp回调函数名的参数名(默认为:callback)      // jsonpCallback: "jsonpCallback",//自定义的jsonp回调函数名称，默认为jQuery自动生成的随机函数名      headers: {        'Content-Type': 'application/json'      },      success: function (res) {        console.log(res.data.images);      }    })  }