查看文件内容

今天心血来潮想写一个用JTREE显示文件夹的JAVA程序。但是因为对JTREE所有甚少，所以查了一些资料，便有了以下的程序。

这个东西好像有两个值得保存的地方，第一，如何利用TREEMODEL来更新JTREE组件，第二，便是如何遍历文件夹

Main类:

 package org.lee.file;import javax.swing.JFrame;import javax.swing.SwingUtilities;public class Main {public static void main(String... args){SwingUtilities.invokeLater(new Runnable(){public void run(){FileFrame ff=new FileFrame();ff.pack();ff.setVisible(true);ff.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}});}}

FileFrame类：

package org.lee.file;import java.awt.*;import java.awt.event.*;import java.io.*;import javax.swing.*;import javax.swing.tree.*;public class FileFrame extends JFrame {/** * */private static final long serialVersionUID = 10009L;/* * 类属性 */private JLabel pathLabel=new JLabel("路径：");private JTextField path=new JTextField(20);private JButton doBtn=new JButton("确定");private DefaultMutableTreeNode root=new DefaultMutableTreeNode("..");private DefaultTreeModel treeModel=new DefaultTreeModel(root);private JTree tree=new JTree(treeModel);private JTextArea mess=new JTextArea(10,20);/* * Constructor */public FileFrame(){//构造页面JPanel p=new JPanel();p.add(pathLabel);p.add(path);p.add(doBtn);add(p,BorderLayout.NORTH);tree.setShowsRootHandles(true);tree.setEditable(true);add(new JScrollPane(tree),BorderLayout.CENTER);mess.setFont(new Font("黑体",Font.BOLD,20));add(new JScrollPane(mess),BorderLayout.SOUTH);init();}/* * 添加事件方法 */private void init(){//按钮事件doBtn.addActionListener(new ActionListener(){@Overridepublic void actionPerformed(ActionEvent evt){if(path.getText()!="" && !path.getText().equals("")){File rootFile=new File(path.getText());DefaultMutableTreeNode newRoot=new DefaultMutableTreeNode(rootFile.getPath());treeModel.setRoot(newRoot);parserFile(newRoot,rootFile);}}});tree.addMouseListener(mouseListener);}/* * @param node 树的节点 * @param f 需遍历的文件 * 遍历文件夹 */public void parserFile(DefaultMutableTreeNode node,File f){if(f.isDirectory()){DefaultMutableTreeNode newNode=null;if(f.getPath().equals(path.getText())){newNode=node;}else{newNode=new DefaultMutableTreeNode(f.getName());node.add(newNode);}File[] files=f.listFiles();for(File file : files){parserFile(newNode,file);}}else{node.add(new DefaultMutableTreeNode(f.getName()));}}/* * 重写树的事件监听器 */MouseListener mouseListener=new MouseAdapter(){@Overridepublic void mouseClicked(MouseEvent evt){if(evt.getClickCount()>=2){//获取选中节点TreePath selfPath=tree.getPathForLocation(evt.getX(), evt.getY());if(selfPath==null) return;DefaultMutableTreeNode node=(DefaultMutableTreeNode)selfPath.getLastPathComponent();//获取选中节点所对应的路径String nodePath=getNodePath(node);if(!nodePath.equals(path.getText())){nodePath=path.getText()+"//"+getNodePath(node);}mess.setText("");//文件内容类FileContent fc=new FileContent(new File(nodePath));mess.append(fc.toString());}}};/* * 得到节点所对应的文件路径 */public String getNodePath(DefaultMutableTreeNode node){DefaultMutableTreeNode newNode=node;DefaultMutableTreeNode newNodeParent=(DefaultMutableTreeNode)newNode.getParent();if(newNodeParent!=null && !newNodeParent.toString().equals(path.getText())){return getNodePath(newNodeParent)+"//"+newNode.toString();}else{return newNode.toString();}}}

FileContent类:

package org.lee.file;import java.io.*;import java.util.*;public class FileContent {private HashMap<String,String> fileMess=new HashMap<String,String>(); private File file;//文件夹的相关属性private String fileType;private String fileName;private String fileLocation;private Long fileSize=0L;private int fileFolder=-1;private int fileCount=0;public FileContent(File file){this.file=file;init();}public void init(){if(file.isDirectory()){fileType="文件夹";parserFile(file);}else{fileType=getSuffix(file)+"文件";fileSize=file.length();fileFolder=0;fileCount=0;}fileLocation=file.getParent();fileName=file.getName();fileMess.put("文件名：", fileName);fileMess.put("文件类型：", fileType);fileMess.put("文件位置：", fileLocation);fileMess.put("文件大小：", String.valueOf(fileSize)+"KB");fileMess.put("包含：", String.valueOf(fileFolder)+"个文件夹,"+ String.valueOf(fileCount)+"个文件");}public void parserFile(File f){if(f.isDirectory()){fileFolder++;File[] files=f.listFiles();for(File fi : files){parserFile(fi);}}else{fileSize+=f.length();fileCount++;}}@Overridepublic String toString(){StringBuilder str=new StringBuilder();for(String key : fileMess.keySet()){str.append(key+fileMess.get(key)+"/r/n");}return str.toString();}/* * 获取后缀名 */public String getSuffix(File f){String name=f.getName();return name.substring(name.lastIndexOf(".")+1);}public String getFileType() {return fileType;}public void setFileType(String fileType) {this.fileType = fileType;}public String getFileName() {return fileName;}public void setFileName(String fileName) {this.fileName = fileName;}public String getFileLocation() {return fileLocation;}public void setFileLocation(String fileLocation) {this.fileLocation = fileLocation;}public Long getFileSize() {return fileSize;}public void setFileSize(Long fileSize) {this.fileSize = fileSize;}public int getFileFolder() {return fileFolder;}public void setFileFolder(int fileFolder) {this.fileFolder = fileFolder;}public int getFileCount() {return fileCount;}public void setFileCount(int fileCount) {this.fileCount = fileCount;}}