解决Jquery下拉框数据动态获取的问题

时间：2021-05-18

废话不多说，直接上源码：

select.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>" rel="external nofollow" > <title>My JSP 'select.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" > --> <script type="text/javascript" src="js/jquery-2.1.1.min.js" charset="utf-8"></script> <script type="text/javascript"> function get_app_type() { $.ajax({ type: "post", url: "AppTypeShow.action", //获取json数据 dataType: "json", success: function(data) { var d = eval("(" + data + ")"); for(var i = 0; i < d.length; i++) { var id = d[i].id; var name = d[i].name; var opt = "<option value='" + id + "'>" + name + "</option>"; $("#appType").append(opt); } }, error: function() { alert("系统异常，请稍后再试！") } }); } function get_app_class() { $.ajax({ type: "post", url: "AppClassShow.action", dataType: "json", success: function(data) { var d = eval("(" + data + ")"); for(var i = 0; i < d.length; i++) { var id = d[i].id; var name = d[i].name; var opt = "<option value='" + id + "'>" + name + "</option>"; $("#appClass").append(opt); } }, error: function() { alert("系统异常，请稍后再试！") } }); } $(document).ready(function() { get_app_type(); get_app_class(); }); </script> </head> <body> <table> <tr> <td align="right">APP类型:</td> <td align="left"> <select name="appType" id="appType" style="margin-left: 16px; height: 30px; width: 110px; text-align: left; size: 3; color: #505050;"> <option value="-1">---请选择---</option> </select> </td> </tr> <tr height="25px"><td> </td></tr> <tr> <td align="right">APP种类:</td> <td align="left"> <select name="appClass" id="appClass" style="margin-left: 16px; height: 30px; width: 110px; text-align: left; size: 3; color: #505050;"> <option value="-1">---请选择---</option> </select> </td> </tr> </table> </body></html>

struts.xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"><struts> <constant name="struts.i18n.encoding" value="UTF-8"></constant> <package name="simpleton" extends="struts-default,json-default"> <action name="*JsonAction" method="{1}" class="jquery.chisj.action.JsonAction"> <result name="fail">error.jsp</result> <result type="json"> <param name="root">result</param> </result> </action> <action name="AppTypeShow" class="jquery.chisj.action.NtAppAction" method="appTypeShow"> <result name="fail">error.jsp</result> <result type="json"> <param name="root">result</param> </result> </action> <action name="AppClassShow" class="jquery.chisj.action.NtAppAction" method="appClassShow"> <result name="fail">error.jsp</result> <result type="json"> <param name="root">result</param> </result> </action> </package></struts>

NtAppAction.java

/** * */package jquery.chisj.action;import java.util.ArrayList;import java.util.List;import jquery.chisj.entity.APPClass;import jquery.chisj.entity.APPType;import com.opensymphony.xwork2.ActionSupport;import net.sf.json.JSONArray;/** * @ClassName: NtAppAction * @Description: TODO * @Author: chisj chisj@foxmail.com * @Date 2016年1月20日 下午4:53:50 * */public class NtAppAction extends ActionSupport { private String result; public String appTypeShow() { System.out.println("---app type show---"); List<APPType> appTypeList = new ArrayList<APPType>(); try { APPType appType_1 = new APPType(); APPType appType_2 = new APPType(); appType_1.setId(Short.valueOf("1")); appType_1.setName("Android"); appType_2.setId(Short.valueOf("2")); appType_2.setName("iOS"); appTypeList.add(appType_1); appTypeList.add(appType_2); JSONArray jsonArray = JSONArray.fromObject(appTypeList); result = String.valueOf(jsonArray); } catch (Exception e) { e.printStackTrace(); } return SUCCESS; } public String appClassShow() { System.out.println("---app class show---"); List<APPClass> appClassList = new ArrayList<APPClass>(); try { APPClass appClass_1 = new APPClass(); APPClass appClass_2 = new APPClass(); appClass_1.setId(Short.valueOf("1")); appClass_1.setName("种类1"); appClass_2.setId(Short.valueOf("2")); appClass_2.setName("种类2"); appClassList.add(appClass_1); appClassList.add(appClass_2); JSONArray jsonArray = JSONArray.fromObject(appClassList); result = String.valueOf(jsonArray); } catch (Exception e) { e.printStackTrace(); } return SUCCESS; } public String getResult() { return result; } public void setResult(String result) { this.result = result; } }

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