java版json解释器及相关代码生成

最近转做前端，但是遇到一个问题就是：

要根据后台得到的json数据进行前端js编程。。。我发现抓取一个json包，然后对着它的格式参数属性来一个一个书写js代码是非常非常痛苦懊恼追悔莫及的。请原谅我用这么多形容词。所以就用业余的匆匆一瞥的时间---时间真的不够，做出了一个草稿形式的app--当然是swing，因为是跨平台---重要的是公司使用的系统除了windows也有linux。

这个程序充满了bug，因为是用Intellij做的，第一次用它来做是swing程序，而且工期太紧了，一天时间做出来，以后可能会翻工。

打包了以后就是这样的：



点击run。bat然后输入下面这个json就可以看到结果了：

{
"employees": [
{ "firstName":"Bill" , "lastName":"Gates" },
{ "firstName":"George" , "lastName":"Bush" },
{ "firstName":"Thomas" , "lastName":"Carter" }
]
}

恩，太仓促了，竟然连连树形图片都找不到。。下次要修正。点击生成js代码：



又一个bug。。。。js格式的不是这样的。好吧，有时间慢慢修正。

下面就将核心部分代码贴出来，顺便给出下载的链接。

package EasisTools.UI;

import Easis.Client.AppConfig;
import Easis.Common.StringUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import javax.swing.*;
import javax.swing.tree.DefaultTreeCellEditor;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeSelectionModel;

/**
* Created with IntelliJ IDEA.
* User: Administrator
* Date: 13-12-21
* Time: 下午1:43
* To change this template use File | Settings | File Templates.
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.List;

import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.border.TitledBorder;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeCellRenderer;
public class JsonStructTree  extends  JPanel  {
/**
* 数据源
* **/
private JTree  _dbTree;
private DefaultMutableTreeNode _tableTreeNode;
private DefaultMutableTreeNode _viewTreeNode;
private DefaultMutableTreeNode _procTreeNode;
private DefaultMutableTreeNode _treeRoot;
private DefaultTreeModel _treeModel;
private AppConfig appConfig=new AppConfig();

public void setHandler(TreeClickHandler handler){
_handler=handler;
}

private JSONObject _jsonObj=null;
private JSONArray _jsonArr=null;

private TreeClickHandler _handler;
public JsonStructTree(JSONObject jsonObject,JSONArray jsonArray) {
_jsonObj=jsonObject;
_jsonArr=jsonArray;

setBackground(Color.WHITE);
setBorder(new TitledBorder(null, "json树形信息", TitledBorder.LEADING, TitledBorder.TOP, null, null));

setLayout(new BorderLayout(0, 0));

JScrollPane scrollPane_1 = new JScrollPane();
add(scrollPane_1, BorderLayout.CENTER);

JTree dbDetailTree = new JTree();
_dbTree=dbDetailTree;
scrollPane_1.setViewportView(dbDetailTree);
_initTreeList();
}

/**
* 初始化树形结构
* */
private void _initTreeList(){
if(_jsonArr==null&&_jsonObj==null){
return;
}

treeItemInfo _t_tableInfo= new treeItemInfo();
treeItemInfo _t_viewInfo=new treeItemInfo();
treeItemInfo _t_procInfo=new treeItemInfo();
_t_tableInfo.icon="table3.png";
_t_tableInfo.itemType="";
_t_tableInfo.name="数据表";

_t_viewInfo.icon="view_icon.png";
_t_viewInfo.itemType="";
_t_viewInfo.name="视图";

_t_procInfo.icon="database_active.png";
_t_procInfo.itemType="";
_t_procInfo.name="存储过程";
_treeRoot=new DefaultMutableTreeNode();
treeItemInfo t1=new treeItemInfo();
t1.icon="sitemap.png";
t1.name="详细信息";
t1.itemType="";

treeItemInfo rootItem=new treeItemInfo();
if(_jsonObj!=null){

rootItem.icon="jsonArrayIcon.png";
rootItem.itemType="jsonObject";
rootItem.name="json对象";
}
else if(_jsonArr!=null){
rootItem.name="json数组";
rootItem.itemType="jsonArray";
rootItem.icon="table163.png";
}

_treeRoot.setUserObject(rootItem);
//--读取下面的json数据，最多三层。
//--第一层
if(_jsonObj!=null){
recursion_setTreeNode(_jsonObj,_treeRoot,0);
}
else if(_jsonArr!=null){
recursion_setTreeNode(_jsonArr,_treeRoot,0);
}

//_dbTree=new JTree(new DefaultMutableTreeNode[]{_tableTreeNode,_viewTreeNode,_procTreeNode});
_treeModel=new DefaultTreeModel(_treeRoot);
_dbTree.setModel(_treeModel);

_dbTree.setRootVisible(false);
//_dbTree.setPreferredSize(new Dimension(150, 25));

_dbTree.setCellRenderer(new dbDetailCell());
_dbTree.addMouseListener(new MouseListener() {

@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub

if(e.getClickCount()>=2){
DefaultMutableTreeNode treeNode=(DefaultMutableTreeNode)   _dbTree.getLastSelectedPathComponent();
treeItemInfo myitemInfo=  (treeItemInfo) treeNode.getUserObject();

if(_handler!=null){

_handler.handler(myitemInfo);
}
else{
System.out.println(myitemInfo.name);
}

}

}
});

}
private int maxLevel=5;

private void recursion_setTreeNode(Object parentObject,DefaultMutableTreeNode parentNode,int parentLevel){
if(parentLevel>maxLevel){
return;
}
if(parentObject==null){
return;
}
if(parentObject instanceof  JSONObject){

JSONObject _obj=(JSONObject) parentObject;

for(String keyName: _obj.keySet()){
treeItemInfo _tItem=new treeItemInfo();
Object cObj=_obj.get(keyName);
if(cObj instanceof  JSONObject){
_tItem.icon="jsonArrayIcon.png";
_tItem.name=keyName;
_tItem.itemType="jsonObject";
DefaultMutableTreeNode _node=new DefaultMutableTreeNode();

_node.setUserObject(_tItem);
parentNode.add(_node);
recursion_setTreeNode(_obj.getJSONObject(keyName),_node,parentLevel+1);
continue;
}
else if(cObj instanceof  JSONArray){
JSONArray _cArr=_obj.getJSONArray(keyName) ;
_tItem.icon="table163.png";
_tItem.name=keyName;
_tItem.itemType="jsonArray";
DefaultMutableTreeNode _node=new DefaultMutableTreeNode();

_node.setUserObject(_tItem);
parentNode.add(_node);
recursion_setTreeNode(_obj.getJSONArray(keyName),_node,parentLevel+1);
return;
}
else{
_tItem.icon="function_logo.png";
_tItem.name=keyName+"="+StringUtil.cutStr(_obj.getString(keyName),6,"...");
_tItem.itemType="jsonAttribute";
DefaultMutableTreeNode _node=new DefaultMutableTreeNode();

_node.setUserObject(_tItem);
parentNode.add(_node);
continue;
}

}
}
else if(parentObject instanceof  JSONArray){

JSONArray j_arr=(JSONArray) parentObject;
for(int cindex=0;cindex<j_arr.size();cindex++){
treeItemInfo _tItem=new treeItemInfo();
Object objRes=j_arr.get(cindex);
_tItem.name="["+cindex+"]";
if(objRes instanceof  JSONObject){
_tItem.icon="jsonArrayIcon.png";

_tItem.itemType="jsonObject";
DefaultMutableTreeNode _node=new DefaultMutableTreeNode();

_node.setUserObject(_tItem);
parentNode.add(_node);
recursion_setTreeNode(objRes,_node,parentLevel+1);
continue;
}
else if(objRes instanceof  JSONArray){

_tItem.icon="table163.png";

_tItem.itemType="jsonArray";
DefaultMutableTreeNode _node=new DefaultMutableTreeNode();

_node.setUserObject(_tItem);
parentNode.add(_node);
recursion_setTreeNode(objRes,_node,parentLevel+1);
return;
}
else{
_tItem.icon="function_logo.png";
_tItem.name+=""+StringUtil.cutStr(objRes.toString(),6,"...");
_tItem.itemType="jsonAttribute";
DefaultMutableTreeNode _node=new DefaultMutableTreeNode();

_node.setUserObject(_tItem);
parentNode.add(_node);
continue;
}
}
}

}

/**
* 根据某个记录ID绑定树形
* */
public void _BindTreeList(int theID){

_tableTreeNode.removeAllChildren();
_viewTreeNode.removeAllChildren();
_procTreeNode.removeAllChildren();

_dbTree.setModel(_treeModel);
_dbTree.updateUI();
}

/**
* 针对树形的数据模型
* */
public class treeItemInfo{
public String name;
public String itemType;
public String icon;

public String toString(){
return this.name;
}

}
/**
* 自定义tree的显示方式
* **/
class dbDetailCell  implements TreeCellRenderer{
@Override
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean selected, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
// TODO Auto-generated method stub
//DynamicUtilTreeNode dUtilTreeNode=(DynamicUtilTreeNode)value;
DefaultMutableTreeNode treeNode=(DefaultMutableTreeNode)value;

Object object=treeNode.getUserObject();

//setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0));
JPanel cPanel=new JPanel();
cPanel.setLayout(new FlowLayout(FlowLayout.LEFT,0,0));

if(leaf==false){
ImageIcon cOpened;
if(expanded==true){
cOpened=appConfig.getResourceIcon("arrow_state_blue_expanded.png", 16	, 16);

cPanel.add(new JLabel(cOpened));

}
else{
cOpened=appConfig.getResourceIcon("arrow_state_blue_right.png", 16	, 16);
cPanel.add(new JLabel(cOpened));

}

}
else{
/*
JLabel lb1=new JLabel();
lb1.setPreferredSize(new Dimension(16, 16));
cPanel.add(lb1);
*/
}

if(object instanceof treeItemInfo){

treeItemInfo tItemInfo=(treeItemInfo)object;
ImageIcon icon= appConfig.getResourceIcon(tItemInfo.icon, 20, 20);
JLabel l1=new JLabel(icon);
l1.setText(tItemInfo.name);
cPanel.add(l1);

}
else{

ImageIcon icon=appConfig.getResourceIcon("stock_unknown.png",20,20);
JLabel l1=new JLabel(icon);
l1.setText(value.toString());
cPanel.add(l1);

}

if (selected) {

//  cPanel.setBackground(Utils.str2color("#90e3f2"));
//setBackground(Utils.str2color("#90e3f2"));
//	setBorder(new )
//setForeground(Color.red);
//setBackground(tree.getse);
//setForeground(tree.getSelectionForeground());
}
else {
cPanel.setBackground(tree.getBackground());
cPanel.setForeground(tree.getForeground());
//setBackground(tree.getBackground());
//setForeground(tree.getForeground());
}
cPanel.setEnabled(tree.isEnabled());
cPanel.setFont(tree.getFont());
cPanel.setOpaque(true);
// cPanel.setPreferredSize(new Dimension(150, 40));
return cPanel;
}}
public interface TreeClickHandler{

public void handler(treeItemInfo itemInfo);

}

}

package EasisTool.Main;

import Easis.Common.StringUtil;
import EasisTools.UI.JsonStructTree;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class JSONViewer extends JDialog {
private JPanel contentPane;
private JButton buttonOK;
private JButton buttonCancel;
private JTextArea txt_json;
private JComboBox cbox_tplType;
private JButton btn_GenCode;
private JScrollPane scroll_tree;
private JTextArea txt_result;

public JSONViewer() {
setContentPane(contentPane);
setModal(true);
getRootPane().setDefaultButton(buttonOK);
init();

buttonOK.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
onOK();
}
});

buttonCancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
onCancel();
}
});

// call onCancel() when cross is clicked
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
onCancel();
}
});

// call onCancel() on ESCAPE
contentPane.registerKeyboardAction(new ActionListener() {
public void actionPerformed(ActionEvent e) {
onCancel();
}
}, KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
}
JSONObject jsonObject=null;
JSONArray jsonArray=null;
private void onOK() {
// add your code here
boolean isArray=false;

jsonObject=null;
jsonArray=null;

try{
jsonObject= JSON.parseObject(txt_json.getText());
}
catch (Exception ed){
}
try{
jsonArray=JSON.parseArray(txt_json.getText());
isArray=true;
}
catch (Exception ed){}

if(jsonObject==null&&jsonArray==null){
JOptionPane.showMessageDialog(null,"该字符串不是json数组也不是json对象。");
return;
}
JOptionPane.showMessageDialog(null,"解析成功");
JsonStructTree jsonStructTree=new JsonStructTree(jsonObject,jsonArray);
scroll_tree.getViewport().removeAll();
scroll_tree.getViewport().setView(jsonStructTree);

}

private void onCancel() {
// add your code here if necessary
dispose();
}

public static void main(String[] args) {
JSONViewer dialog = new JSONViewer();
dialog.pack();
dialog.setVisible(true);
System.exit(0);
}

private void init(){
this.setPreferredSize(new Dimension(800,600));
cbox_tplType.addItem("js形式代码");
cbox_tplType.addItem("js精简形式代码");
setEvents();

}

private void setEvents(){
btn_GenCode.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//To change body of implemented methods use File | Settings | File Templates.
if(cbox_tplType.getSelectedItem()==null){
JOptionPane.showMessageDialog(null,"请选择需要生成的模板！");
return;
}
String selectedTxt=cbox_tplType.getSelectedItem().toString();
if(selectedTxt.equals("js形式代码")){
if(jsonArray==null&&jsonObject==null){
JOptionPane.showMessageDialog(null,"您没有进行有效的json解析！");
return;
}
if(jsonObject!=null){

txt_result.setText(recursion_getChildNodeString(jsonObject,0,false,0,""));
return;
}
else{
txt_result.setText(recursion_getChildNodeString(jsonArray,0,false,0,""));
return;
}
}
else if(selectedTxt.equals("js精简形式代码")){
if(jsonArray==null&&jsonObject==null){
JOptionPane.showMessageDialog(null,"您没有进行有效的json解析！");
return;
}
if(jsonObject!=null){

txt_result.setText(recursion_getChildNodeString(jsonObject,0,true,8,".."));
return;
}
else{
txt_result.setText(recursion_getChildNodeString(jsonArray,0,true,8,".."));
return;
}
}

}
});
}

/**
* @param parentObj 父亲节点。
* @param parentBlanks 父亲节点的空格数量。
* @param needLimitLength 是否需要限制值的长度
* @param limitLength 值的最大长度
* @param thumbTail 假如限制值长度，那么后面的后缀
* @return  字符串
*
* */
private String recursion_getChildNodeString(Object parentObj,int parentBlanks,boolean needLimitLength,int limitLength,String thumbTail){
if(parentObj==null){
return "";
}
String resStr="";
if(parentObj instanceof JSONObject){
JSONObject cobj=(JSONObject)parentObj;
for(String keyName :cobj.keySet()){
Object childObj=cobj.get(keyName);
if(childObj==null){ continue;}
if(childObj instanceof  JSONObject){
resStr+=StringUtil.repeatChar(' ',parentBlanks)+keyName+":{\n";
resStr+=recursion_getChildNodeString(childObj,parentBlanks+keyName.length()+2,needLimitLength,limitLength,thumbTail);
resStr+=StringUtil.repeatChar(' ',parentBlanks+keyName.length()+2)+"};\n";
}
else if(childObj instanceof  JSONArray){
JSONArray objArr=(JSONArray)childObj;
resStr+=StringUtil.repeatChar(' ',parentBlanks)+keyName+":[\n";
resStr+=recursion_getChildNodeString(objArr,parentBlanks+keyName.length()+2,needLimitLength,limitLength,thumbTail);

resStr+=StringUtil.repeatChar(' ',parentBlanks+keyName.length()+2)+"];\n";
}
else{
resStr+=StringUtil.repeatChar(' ',parentBlanks)+keyName+":";
String valueStr=childObj.toString();
if(needLimitLength){
resStr+="\""+ StringUtil.cutStr(valueStr,limitLength,thumbTail)+"\";\n";
}
else{
resStr+="\""+ valueStr+"\";\n";
}
}

}
return resStr;

}
else if(parentObj instanceof  JSONArray){
JSONArray objArr=(JSONArray)parentObj;
// resStr+=StringUtil.repeatChar(' ',parentBlanks)+"[\n";

for(int cindex=0;cindex< objArr.size();cindex++){
Object childObj=objArr.get(cindex);
if(childObj instanceof  JSONObject){
resStr+= recursion_getChildNodeString(objArr.get(cindex),parentBlanks+1,needLimitLength,limitLength,thumbTail);

}
else if(childObj instanceof  JSONArray){
resStr+= recursion_getChildNodeString(objArr.get(cindex),parentBlanks+1,needLimitLength,limitLength,thumbTail);
}
else{
String valueStr=childObj.toString();
String dotStr=cindex>=objArr.size()-1?"":",";
if(needLimitLength){
resStr+=StringUtil.repeatChar(' ',parentBlanks+2)+"\""+StringUtil.cutStr(valueStr,limitLength,thumbTail)+"\""+dotStr+"\n";
}
else{
resStr+=StringUtil.repeatChar(' ',parentBlanks+2)+"\""+valueStr+"\""+dotStr+"\n";
}

}
}
// resStr+=StringUtil.repeatChar(' ',parentBlanks)+"]\n";
return resStr;
}

else{
return "";
}
}
}

假如想试用的话，就到下面地址，