Java屏蔽路径代码 java怎么屏蔽部分代码

java jtree 文件目录树 怎么让目录树不显示文件夹的路径，目录树add的时候用的是File类型

import java.awt.BorderLayout;

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import java.awt.Component;

import java.io.File;

import java.util.*;

import javax.swing.*;

import javax.swing.border.EmptyBorder;

import javax.swing.filechooser.FileSystemView;

import javax.swing.tree.DefaultTreeCellRenderer;

import javax.swing.tree.TreeNode;

/**

* @author Kirill Grouchnikov

*/

public class FileTreePanel extends JPanel {

/**

* File system view.

*/

protected static FileSystemView fsv = FileSystemView.getFileSystemView();

/**

* Renderer for the file tree.

*

* @author Kirill Grouchnikov

*/

private static class FileTreeCellRenderer extends DefaultTreeCellRenderer {

/**

* Icon cache to speed the rendering.

*/

private MapString, Icon iconCache = new HashMapString, Icon();

/**

* Root name cache to speed the rendering.

*/

private MapFile, String rootNameCache = new HashMapFile, String();

/*

* (non-Javadoc)

*

* @see javax.swing.tree.DefaultTreeCellRenderer#getTreeCellRendererComponent(javax.swing.JTree,

* java.lang.Object, boolean, boolean, boolean, int, boolean)

*/

@Override

public Component getTreeCellRendererComponent(JTree tree, Object value,

boolean sel, boolean expanded, boolean leaf, int row,

boolean hasFocus) {

FileTreeNode ftn = (FileTreeNode) value;

File file = ftn.file;

String filename = "";

if (file != null) {

if (ftn.isFileSystemRoot) {

// long start = System.currentTimeMillis();

filename = this.rootNameCache.get(file);

if (filename == null) {

filename = fsv.getSystemDisplayName(file);

this.rootNameCache.put(file, filename);

}

// long end = System.currentTimeMillis();

// System.out.println(filename + ":" + (end - start));

} else {

filename = file.getName();

}

}

JLabel result = (JLabel) super.getTreeCellRendererComponent(tree,

filename, sel, expanded, leaf, row, hasFocus);

if (file != null) {

Icon icon = this.iconCache.get(filename);

if (icon == null) {

// System.out.println("Getting icon of " + filename);

icon = fsv.getSystemIcon(file);

this.iconCache.put(filename, icon);

}

result.setIcon(icon);

}

return result;

}

}

/**

* A node in the file tree.

*

* @author Kirill Grouchnikov

*/

private static class FileTreeNode implements TreeNode {

/**

* Node file.

*/

private File file;

/**

* Children of the node file.

*/

private File[] children;

/**

* Parent node.

*/

private TreeNode parent;

/**

* Indication whether this node corresponds to a file system root.

*/

private boolean isFileSystemRoot;

/**

* Creates a new file tree node.

*

* @param file

* Node file

* @param isFileSystemRoot

* Indicates whether the file is a file system root.

* @param parent

* Parent node.

*/

public FileTreeNode(File file, boolean isFileSystemRoot, TreeNode parent) {

this.file = file;

this.isFileSystemRoot = isFileSystemRoot;

this.parent = parent;

this.children = this.file.listFiles();

if (this.children == null)

this.children = new File[0];

}

/**

* Creates a new file tree node.

*

* @param children

* Children files.

*/

public FileTreeNode(File[] children) {

this.file = null;

this.parent = null;

this.children = children;

}

/*

* (non-Javadoc)

*

* @see javax.swing.tree.TreeNode#children()

*/

public Enumeration? children() {

final int elementCount = this.children.length;

return new EnumerationFile() {

int count = 0;

/*

* (non-Javadoc)

*

* @see java.util.Enumeration#hasMoreElements()

*/

public boolean hasMoreElements() {

return this.count elementCount;

}

/*

* (non-Javadoc)

*

* @see java.util.Enumeration#nextElement()

*/

public File nextElement() {

if (this.count elementCount) {

return FileTreeNode.this.children[this.count++];

}

throw new NoSuchElementException("Vector Enumeration");

}

};

}

/*

* (non-Javadoc)

*

* @see javax.swing.tree.TreeNode#getAllowsChildren()

*/

public boolean getAllowsChildren() {

return true;

}

/*

* (non-Javadoc)

*

* @see javax.swing.tree.TreeNode#getChildAt(int)

*/

public TreeNode getChildAt(int childIndex) {

return new FileTreeNode(this.children[childIndex],

this.parent == null, this);

}

/*

* (non-Javadoc)

*

* @see javax.swing.tree.TreeNode#getChildCount()

*/

public int getChildCount() {

return this.children.length;

}

/*

* (non-Javadoc)

*

* @see javax.swing.tree.TreeNode#getIndex(javax.swing.tree.TreeNode)

*/

public int getIndex(TreeNode node) {

FileTreeNode ftn = (FileTreeNode) node;

for (int i = 0; i this.children.length; i++) {

if (ftn.file.equals(this.children[i]))

return i;

}

return -1;

}

/*

* (non-Javadoc)

*

* @see javax.swing.tree.TreeNode#getParent()

*/

public TreeNode getParent() {

return this.parent;

}

/*

* (non-Javadoc)

*

* @see javax.swing.tree.TreeNode#isLeaf()

*/

public boolean isLeaf() {

return (this.getChildCount() == 0);

}

}

/**

* The file tree.

*/

private JTree tree;

/**

* Creates the file tree panel.

*/

public FileTreePanel() {

this.setLayout(new BorderLayout());

File[] roots = File.listRoots();

FileTreeNode rootTreeNode = new FileTreeNode(roots);

this.tree = new JTree(rootTreeNode);

this.tree.setCellRenderer(new FileTreeCellRenderer());

this.tree.setRootVisible(false);

final JScrollPane jsp = new JScrollPane(this.tree);

jsp.setBorder(new EmptyBorder(0, 0, 0, 0));

this.add(jsp, BorderLayout.CENTER);

}

public static void main(String[] args) {

SwingUtilities.invokeLater(new Runnable() {

public void run() {

JFrame frame = new JFrame("File tree");

frame.setSize(500, 400);

frame.setLocationRelativeTo(null);

frame.add(new FileTreePanel());

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

});

}

}

Java web工程中前台网站jsp怎样做可以隐藏路径 不是用frame那种

用URL重写试试，或者等加载完某页面后用JavaScript修改浏览器的URL，或者用服务器端包含，等等，很多情况。

关于java代码中文件路径的问题

这就是相对路径

指的是相对于工程文件的位置而言

在eclipse的结构图中的位置

在windows的文件夹里的位置

在查看属性里的绝对路径的位置

代码来找文件路径

public class Test {

public static void main(String[] args) throws Exception {

System.out.println("当前目录的路径\t"+new File(".").getCanonicalPath());// "."表示当前目录

File file = new File("Buffered.txt");

if(!file.exists()){//如果不存在,就新建该文件

file.createNewFile();

}

System.out.println("Buffered.txt的绝对路径\t"+file.getCanonicalPath());

System.out.println("Buffered.txt的相对路径\t"+file.getPath());

}

}

输出

当前目录的路径 D:\space\workspace\Demo

Buffered.txt的绝对路径 D:\space\workspace\Demo\Buffered.txt

Buffered.txt的相对路径 Buffered.txt

javaweb跳转如何能看不见后台java代码路径

有两种跳转方式，你用不需要传值的时候用的那种，那个单词我不会写了，他就不会显示你的路劲

java web 屏蔽一段代码用什么符号

JAVA里面？

//

或

/*

*/

HTML?

!--

--