页面：
<%--
Created by IntelliJ IDEA.
User: songzhen
Date: 2017/9/8
Time: 20:02
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path;
%>
<html>
<head>
<title>三级联动</title>
<script type="text/javascript" src="../jq/jquery.min.js"></script>
<script type="text/javascript">
$(function () {
alert("//")
$("#s").change(function () {
$.ajax({
url: '<%=basePath%>/news/selectsj.action',
type: 'get',
dataType: 'text',
data: {pid: $("#s").val()},
success: function (data) {
$("#s1").empty();
$.each(eval(data), function (i, item) {
$("<option value='" + item.id + "'>" + item.name + "</option>").appendTo($("#s1"));
});
},
error:
function () {
alert("系统出错");
}
});
});
$("#s1").change(function () {
$.ajax({
url: '<%=basePath%>/news/selectsj.action',
type: 'get',
dataType: 'text',
data: {pid: $("#s1").val()},
success: function (data) {
$("#s2").empty();
$.each(eval(data), function (i, item) {
$("<option value='" + item.id + "'>" + item.name + "</option>").appendTo($("#s2"));
});
},
error:
function () {
alert("系统出错");
}
});
});
})
;
</script>
</head>
<body>
<select id="s">
<option>请选择</option>
<c:forEach items="${list}" var="li">
<option value="${li.id}">${li.name}</option>
</c:forEach>
</select>
<select id="s1">
<option>请选择</option>
</select>
<select id="s2">
<option>请选择</option>
</select>
</body>
</html>
jar包：
<!--发送邮件-->
<dependency>
<groupId>javax.mail</groupId>
<artifactId>javax.mail-api</artifactId>
<version>1.5.5</version>
</dependency>
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.5.5</version>
</dependency>
controller：
@RequestMapping("/selectshuju")
public String selectDictionary(@RequestParam int pid, Model model){
System.out.println(pid);
List<Dictionary> dictionaries = newsService.selectDictionary(pid);
model.addAttribute("list",dictionaries);
return "/dictionary";
}
@RequestMapping("/selectsj")
@ResponseBody
public List<Dictionary> selectsj(@RequestParam int pid, Model model){
System.out.println(pid);
List<Dictionary> list = newsService.selectDictionary(pid);
System.out.print(list);
model.addAttribute("list",list);
return list;
}