二级联动的实现
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
function loadInfo(){
var shengId=document.getElementById("sheng").value;
shi.options.length=0; // 删除所有市下拉框的选项
var xmlHttp;
if(window.XMLHttpRequest){
xmlHttp=new XMLHttpRequest();
}else{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlHttp.onreadystatechange=function(){
if(xmlHttp.readyState==4 && xmlHttp.status==200){
alert(xmlHttp.responseText);
var dataObj=eval("("+xmlHttp.responseText+")");
for(var i=0;i<dataObj.rows.length;i++){
var o=dataObj.rows[i];
shi.options.add(new Option(o.text,o.id));
}
}
};
xmlHttp.open("get", "getAjaxInfo?action=ejld&shengId="+shengId, true);
xmlHttp.send();
}
</script>
</head>
<body>
省:
<select id="sheng" onchange="loadInfo()">
<option value="1">江苏省</option>
<option value="2">山东省</option>
<option value="3">浙江省</option>
</select>
市
<select id="shi">
</select>
</body>
</html>
<?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>HeadFirstAjaxJsonChap02</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>getAjaxInfoServlet</servlet-name>
<servlet-class>com.web.GetAjaxInfoServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>getAjaxInfoServlet</servlet-name>
<url-pattern>/getAjaxInfo</url-pattern>
</servlet-mapping>
</web-app>
package com.java1234.web;
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 net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class GetAjaxInfoServlet extends HttpServlet{
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
String action=request.getParameter("action");
if("ejld".equals(action)){
this.ejld(request, response);
}
}
private void ejld(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out=response.getWriter();
String shengId=request.getParameter("shengId");
JSONObject resultJson=new JSONObject();
JSONArray jsonArray=new JSONArray();
JSONObject temp=null;
switch(Integer.parseInt(shengId)){
case 1:{
temp=new JSONObject();temp.put("id", 1);temp.put("text", "南京");jsonArray.add(temp);
temp=new JSONObject();temp.put("id", 2);temp.put("text", "南通");jsonArray.add(temp);
temp=new JSONObject();temp.put("id", 3);temp.put("text", "泰兴");jsonArray.add(temp);
break;
}
case 2:{
temp=new JSONObject();temp.put("id", 4);temp.put("text", "济南");jsonArray.add(temp);
temp=new JSONObject();temp.put("id", 5);temp.put("text", "烟台");jsonArray.add(temp);
temp=new JSONObject();temp.put("id", 6);temp.put("text", "蓬莱");jsonArray.add(temp);
break;
}
case 3:{
temp=new JSONObject();temp.put("id", 7);temp.put("text", "杭州");jsonArray.add(temp);
temp=new JSONObject();temp.put("id", 8);temp.put("text", "宁波");jsonArray.add(temp);
temp=new JSONObject();temp.put("id", 9);temp.put("text", "温州");jsonArray.add(temp);
break;
}
}
resultJson.put("rows", jsonArray);
out.println(resultJson);
out.flush();
out.close();
}
}
js生成下拉选项,动态生成二级字典项
选择一个部门,那么职位的下拉框要展示这个部门下特定的职位。
setZw();
$("#SY_DDTX-infoForm-DDTX_DEP").change(function(){
setZw();
});
function setZw(){
$.each($("#infoForm-DDTX_POSI option"),function(index,obj){
if(index!=0){
$(obj).remove();
}
});
var url = Leopard.getContextPath() + "/queryZwList.act";
var bmId = document.getElementById("infoForm-DDTX_DEP").value;
var paramData = {"bmId":bmId};//"{bmId:" + bmId + "}";
var jsonObj = getData(url,paramData);
for(var i=0;i<jsonObj.length;i++){
if(jsonObj[i].data.NAME==DDTX_POSI){
$("#infoForm-DDTX_POSI").append("<option selected='selected' value='"+jsonObj[i].data.NAME+"'>"+jsonObj[i].data.NAME+"</option>");
}else{
$("#infoForm-DDTX_POSI").append("<option value='"+jsonObj[i].data.NAME+"'>"+jsonObj[i].data.NAME+"</option>");
}
}
}
后台查询Controller
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class SyDdtxController {
@RequestMapping(value = "/queryZwList")
@ResponseBody
public List<IBean> queryZwList(HttpServletRequest request, String bmId) {
String sql = "select * from SY_ZW where CODE = ?";
List<IBean> itemsList = SqlUtil.getExecutor().queryForList(sql, bmId);
return itemsList;
}
}