使用zTree进行数据动态显示
由于公司项目的须要。现学了一下zTree的使用。
以下是我项目的结构图：
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baseDao类
package com.wiseweb.zTree; import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement; public class BaseDao {
static Connection conn ;
PreparedStatement pstm ;
ResultSet rs ; public static Connection getConnection(){
try {
Class.forName("com.mysql.jdbc.Driver") ;
try {
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/crud", "root", "root") ;
System.out.println("------------打开连接---------------");
} catch (SQLException e) {
System.out.println("------------连接失败---------------");
e.printStackTrace();
}
} catch (ClassNotFoundException e) {
System.out.println("-----------------驱动载入失败---------------");
e.printStackTrace();
}
return conn ;
}
public static void closeConnection(ResultSet rs,Statement st,Connection conn){
try {
if(rs != null){
rs.close() ;
}
if(st != null){
st.close() ;
}
if(conn != null){
conn.close() ;
}
System.out.println("----------------关闭连接----------------");
} catch (SQLException e) {
System.out.println("----------------关闭连接失败----------------");
e.printStackTrace();
}
}
}
实体Competence类
package com.wiseweb.zTree;
public class Competence {
private int id ;
private int pId ;
private int isParent ;
private String name ;
private int open ;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public int getpId() {
return pId;
}
public void setpId(int pId) {
this.pId = pId;
}
public int getIsParent() {
return isParent;
}
public void setIsParent(int isParent) {
this.isParent = isParent;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getOpen() {
return open;
}
public void setOpen(int open) {
this.open = open;
}
}
Test类
package com.wiseweb.zTree; import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List; public class Test extends BaseDao{
public List<Competence> getAllAuthorize(){
List<Competence> authorizes = new ArrayList<Competence>() ;
Connection conn = getConnection() ;
try {
pstm = conn.prepareStatement("select * from competence") ;
rs = pstm.executeQuery() ;
while(rs.next()){
Competence authorize = new Competence() ;
authorize.setId(rs.getInt("id")) ;
authorize.setName(rs.getString("name")) ;
authorize.setIsParent(rs.getInt("isParent")) ;
authorize.setOpen(rs.getInt("open")) ;
authorize.setpId(rs.getInt("pId")) ;
authorizes.add(authorize) ;
}
} catch (SQLException e) {
System.out.println("-----------查询competence失败-------------");
e.printStackTrace();
}finally{
closeConnection(rs,pstm,conn) ;
}
return authorizes ;
}
public String getJsonData(){
List<Competence> list = getAllAuthorize() ;
StringBuffer json = new StringBuffer("[") ;
String data = "" ;
int length = list.size() ;
for(int i=0;i<length;i++){
json.append("{id:" + list.get(i).getId() + ",") ;
json.append("pId:" + list.get(i).getpId() + ",") ;
json.append("name:\"" + list.get(i).getName() + "\",") ;
if(list.get(i).getIsParent() != 0){
json.append("isParent:" + list.get(i).getIsParent() + ",") ;
}
if(list.get(i).getOpen() != 0){
json.append("open:" + list.get(i).getOpen() + ",") ;
}
data = json.substring(0,json.lastIndexOf(",")) + "}," ;
json = new StringBuffer(data) ;
}
data = json.substring(0,json.length()-1) + "]" ;
System.out.println(data);
return data ;
}
public static void main(String[] args) {
new Test().getJsonData() ;
}
}
asynload.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>asynload.html</title> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="css/demo.css" type="text/css">
<link rel="stylesheet" href="css/zTreeStyle.css" type="text/css">
<script type="text/javascript" src="js/jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="js/jquery.ztree.core-3.5.js"></script> <script type="text/javascript">
var setting = {
async:{
enable:true,
url:"loadData.jsp",
autoParam:["id"],
},
data:{
simpleData:{
enable:true,
idKey:"id",
pIdKey:"pId",
rootPId:0
}
},
callback:{
onClick:function(event,treeId,treeNode,clickFlag){
if(!treeNode.isParent){
alert("treeId自己主动编号：" + treeNode.tId + ",节点id是：" + treeNode.id + ",节点文本是：" + treeNode.name) ;
}
},
onAsyncError:zTreeOnAsyncError,
onAsyncSuccess:function(event,treeId,treeNode,msg){ }
}
};
function filter(treeId, parentNode, childNodes) {
if (!childNodes)
return null;
for ( var i = 0, l = childNodes.length; i < l; i++) {
childNodes[i].name = childNodes[i].name.replace(/\.n/g, '.');
}
return childNodes;
}
function zTreeOnAsyncError(event,treeId,treeNode,XMLHttpRequest,textStatus,errorThrown){
alert("载入错误：" + XMLHttpRequest) ;
}
$(document).ready(function(){
$.fn.zTree.init($("#treeDemo"),setting) ;
}) ;
</script>
</head> <body>
<div>
<ul id="treeDemo" class="zTree"></ul>
</div>
</body>
</html>
index.jsp主程序
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
//String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
request.setAttribute("ctx",request.getContextPath());
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>zTree</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" href="${ctx }/css/demo.css" type="text/css">
<link rel="stylesheet" href="${ctx }/css/zTreeStyle.css" type="text/css">
<script type="text/javascript" src="${ctx }/js/jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="${ctx }/js/jquery.ztree.core-3.5.js"></script> <script type="text/javascript">
var setting = {
async:{
enable:true,
url:"loadData.jsp",
autoParam:["id"],
},
data:{
simpleData:{
enable:true,
idKey:"id",
pIdKey:"pId",
rootPId:0
}
},
callback:{
onClick:function(event,treeId,treeNode,clickFlag){
if(!treeNode.isParent){
alert("treeId自己主动编号：" + treeNode.tId + ",节点id是：" + treeNode.id + ",节点文本是：" + treeNode.name) ;
}
},
onAsyncError:zTreeOnAsyncError,
onAsyncSuccess:function(event,treeId,treeNode,msg){ }
}
};
function filter(treeId, parentNode, childNodes) {
if (!childNodes)
return null;
for ( var i = 0, l = childNodes.length; i < l; i++) {
childNodes[i].name = childNodes[i].name.replace(/\.n/g, '.');
}
return childNodes;
}
function zTreeOnAsyncError(event,treeId,treeNode,XMLHttpRequest,textStatus,errorThrown){
alert("载入错误：" + XMLHttpRequest) ;
}
$(document).ready(function(){
$.fn.zTree.init($("#treeDemo"),setting) ;
}) ;
</script>
</head> <body>
<div>
<ul id="treeDemo" class="zTree"></ul>
</div>
</body>
</html>
loadData.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="com.wiseweb.zTree.*" %>
<%
String id = request.getParameter("id") ;
System.out.println("得到的节点id: " + id) ;
Test demo = new Test() ;
String json = demo.getJsonData() ;
out.print(json) ;
%>
zTree.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>zTree.html</title> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="css/demo.css" type="text/css">
<link rel="stylesheet" href="css/zTreeStyle.css" type="text/css">
<script type="text/javascript" src="js/jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="js/jquery.ztree.core-3.5.js"></script>
<!--<link rel="stylesheet" type="text/css" href="./styles.css">--> <script type="text/javascript">
function setFontCss(treeId,treeNode){
return treeNode.level==0?{color:"red"}:{};
}
var setting = {
data:{
simpleData: {
enable: true,
idKey: "id",
pIdKey: "pId",
rootPId:0,
}
},
view:{
showLine: false,//是否显示连接线
//showIcon: false,//是否显示节点图标
//showTitle: false,//是否显示节点的title提示信息
fontCss: setFontCss,//改变字体颜色和样式
}
};
var zNodes = [
{id:1, pId:0, name:"父节点1-展开", open:true, iconOpen:"WEB-INF/image/1_open.png", iconClose:"WEB-INF/image/1_close.png"},
{id:11, pId:1, name:"父节点11-折叠", icon:"WEB-INF/image/2.png"},
{id:111, pId:11, name:"叶子节点111",url:"http://www.baidu.com"},//超链接
{id:112, pId:11, name:"叶子节点112"},
{id:113, pId:11, name:"叶子节点113"},
{id:114, pId:11, name:"叶子节点114"},
{ id:12, pId:1, name:"父节点12 - 折叠"},
{ id:121, pId:12, name:"叶子节点121"},
{ id:122, pId:12, name:"叶子节点122"},
{ id:123, pId:12, name:"叶子节点123"},
{ id:124, pId:12, name:"叶子节点124"},
{ id:13, pId:1, name:"父节点13 - 没有子节点", isParent:true},
{ id:2, pId:0, name:"父节点2 - 折叠"},
{ id:21, pId:2, name:"父节点21 - 展开", open:true},
{ id:211, pId:21, name:"叶子节点211"},
{ id:212, pId:21, name:"叶子节点212"},
{ id:213, pId:21, name:"叶子节点213"},
{ id:214, pId:21, name:"叶子节点214"},
{ id:22, pId:2, name:"父节点22 - 折叠"},
{ id:221, pId:22, name:"叶子节点221"},
{ id:222, pId:22, name:"叶子节点222"},
{ id:223, pId:22, name:"叶子节点223"},
{ id:224, pId:22, name:"叶子节点224"},
{ id:23, pId:2, name:"父节点23 - 折叠"},
{ id:231, pId:23, name:"叶子节点231"},
{ id:232, pId:23, name:"叶子节点232"},
{ id:233, pId:23, name:"叶子节点233"},
{ id:234, pId:23, name:"叶子节点234"},
{ id:3, pId:0, name:"父节点3 - 没有子节点", isParent:true}
];
$(document).ready(function(){
$.fn.zTree.init($("#treeDemo"),setting,zNodes) ;
}) ;
</script>
</head> <body>
<h1>最简单的树--简单的json数据</h1>
<ul id="treeDemo" class="ztree"></ul>
</body>
</html>
数据库图片：
浏览器输入http://localhost:8080/testZtree进行显示
结果为：
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