JAVA版文件MD5生成器

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*Tochangethistemplate,chooseTools|Templates
*andopenthetemplateintheeditor.
*/
package test1;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JProgressBar;

/**
*
* @author hadeslee
*/
public final class Util{

/**
*得到文件的MD5码,用于校验
* @param file
* @param jpb
* @return
*/
public static StringgetMD5(Filefile,JProgressBarjpb){
FileInputStreamfis = null ;
jpb.setMaximum(( int )file.length());
jpb.setValue( 0 );
jpb.setString( " 正在计算: " + file.getName() + " 的MD5值 " );
try {
MessageDigestmd = MessageDigest.getInstance( " MD5 " );
fis = new FileInputStream(file);
byte []buffer = new byte [ 8192 ];
int length = - 1 ;
System.out.println( " 开始算 " );
int value = 0 ;
while ((length = fis.read(buffer)) != - 1 ){
md.update(buffer, 0 ,length);
value += length;
jpb.setValue(value);
}
System.out.println( " 算完了 " );
return bytesToString(md.digest());
} catch (IOExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
return null ;
} catch (NoSuchAlgorithmExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
return null ;
} finally {
try {
fis.close();
} catch (IOExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
}
}
}

/**
*
* @param file
* @return
*/
public static StringgetMD5(Filefile){
FileInputStreamfis = null ;
try {
MessageDigestmd = MessageDigest.getInstance( " MD5 " );
fis = new FileInputStream(file);
byte []buffer = new byte [ 8192 ];
int length = - 1 ;
System.out.println( " 开始算 " );
while ((length = fis.read(buffer)) != - 1 ){
md.update(buffer, 0 ,length);
}
System.out.println( " 算完了 " );
return bytesToString(md.digest());
} catch (IOExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
return null ;
} catch (NoSuchAlgorithmExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
return null ;
} finally {
try {
fis.close();
} catch (IOExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
}
}
}

/**
*得到文件的SHA码,用于校验
* @param file
* @return
*/
public static StringgetSHA(Filefile){
FileInputStreamfis = null ;
try {
MessageDigestmd = MessageDigest.getInstance( " SHA " );
fis = new FileInputStream(file);
byte []buffer = new byte [ 8192 ];
int length = - 1 ;
System.out.println( " 开始算 " );
while ((length = fis.read(buffer)) != - 1 ){
md.update(buffer, 0 ,length);
}
System.out.println( " 算完了 " );
return bytesToString(md.digest());
} catch (IOExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
return null ;
} catch (NoSuchAlgorithmExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
return null ;
} finally {
try {
fis.close();
} catch (IOExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
}
}
}

/**
*
* @param file
* @param jpb
* @return
*/
public static StringgetSHA(Filefile,JProgressBarjpb){
FileInputStreamfis = null ;
jpb.setMaximum(( int )file.length());
jpb.setValue( 0 );
jpb.setString( " 正在计算: " + file.getName() + " 的MD5值 " );
try {
MessageDigestmd = MessageDigest.getInstance( " SHA " );
fis = new FileInputStream(file);
byte []buffer = new byte [ 8192 ];
int length = - 1 ;
System.out.println( " 开始算 " );
int value = 0 ;
while ((length = fis.read(buffer)) != - 1 ){
md.update(buffer, 0 ,length);
value += length;
jpb.setValue(value);
}
System.out.println( " 算完了 " );
return bytesToString(md.digest());
} catch (IOExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
return null ;
} catch (NoSuchAlgorithmExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
return null ;
} finally {
try {
fis.close();
} catch (IOExceptionex){
Logger.getLogger(Util. class .getName()).log(Level.SEVERE, null ,ex);
}
}
}

public static StringbytesToString( byte []data){
char hexDigits[] = { ' 0 ' , ' 1 ' , ' 2 ' , ' 3 ' , ' 4 ' , ' 5 ' , ' 6 ' , ' 7 ' , ' 8 ' , ' 9 ' , ' a ' , ' b ' , ' c ' , ' d ' ,
' e ' , ' f ' };
char []temp = new char [data.length * 2 ];
for ( int i = 0 ;i < data.length;i ++ ){
byte b = data[i];
temp[i * 2 ] = hexDigits[b >>> 4 & 0x0f ];
temp[i * 2 + 1 ] = hexDigits[b & 0x0f ];
}
return new String(temp);

}

public static void main(String[]args){
Strings = System.getProperties().getProperty( " java.io.tmpdir " );
System.out.println(s);
}
}

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> --> /*
*Main.java
*
*Createdon2007年11月8日,上午9:15
*/
package test1;

import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.swing.JFileChooser;
import javax.swing.UIManager;

/**
*
* @author hadeslee
*/
public class Main extends javax.swing.JFrame implements DropTargetListener{

private JFileChooserjfc;
private FiletoMd5;
private DropTargetdt;
/** CreatesnewformMain */

public Main(){
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exceptionexe){
exe.printStackTrace();
}
initComponents();
initOther();
this .setLocationRelativeTo( null );
}

private void initOther(){
dt = new DropTarget(jTextArea1,DnDConstants.ACTION_COPY_OR_MOVE, this );
}
/** Thismethodiscalledfromwithintheconstructorto
*initializetheform.
*WARNING:DoNOTmodifythiscode.Thecontentofthismethodis
*alwaysregeneratedbytheFormEditor.
*/
// <editor-folddefaultstate="collapsed"desc="GeneratedCode">
private void initComponents(){

jLabel1 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jpb = new javax.swing.JProgressBar();
jLabel2 = new javax.swing.JLabel();
jTextField2 = new javax.swing.JTextField();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle( " MD5生成 " );
setResizable( false );

jLabel1.setText( " 文件路径: " );

jTextField1.setEditable( false );

jButton1.setText( " 浏览 " );
jButton1.addActionListener( new java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEventevt){
jButton1ActionPerformed(evt);
}
});

jScrollPane1.setBorder(javax.swing.BorderFactory.createTitledBorder( " 文件信息 " ));

jTextArea1.setColumns( 20 );
jTextArea1.setRows( 5 );
jScrollPane1.setViewportView(jTextArea1);

jButton2.setText( " 生成 " );
jButton2.addActionListener( new java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEventevt){
jButton2ActionPerformed(evt);
}
});

jButton3.setText( " 退出 " );
jButton3.addActionListener( new java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEventevt){
jButton3ActionPerformed(evt);
}
});

jLabel2.setText( " MD5值: " );

jTextField2.setEditable( false );

javax.swing.GroupLayoutlayout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false )
.addGroup(layout.createSequentialGroup()
.addComponent(jButton2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jButton3)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jpb,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField2))
.addComponent(jScrollPane1)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField1,javax.swing.GroupLayout.PREFERRED_SIZE, 246 ,javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jButton1)))
.addContainerGap( 16 ,Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(jTextField1,javax.swing.GroupLayout.PREFERRED_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton1))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jScrollPane1,javax.swing.GroupLayout.PREFERRED_SIZE, 182 ,javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(jTextField2,javax.swing.GroupLayout.PREFERRED_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 11 ,Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.CENTER)
.addComponent(jButton3)
.addComponent(jpb,javax.swing.GroupLayout.PREFERRED_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap())
.addGroup(layout.createSequentialGroup()
.addGap( 267 , 267 , 267 )
.addComponent(jButton2)
.addGap( 10 , 10 , 10 ))
);

pack();
} // </editor-fold>

private void jButton1ActionPerformed(java.awt.event.ActionEventevt){
// TODOaddyourhandlingcodehere:
if (jfc == null ){
jfc = new JFileChooser();
jfc.setFileSelectionMode(JFileChooser.FILES_ONLY);
}
if (jfc.showOpenDialog( this ) == JFileChooser.APPROVE_OPTION){
toMd5 = jfc.getSelectedFile();
jTextField1.setText(toMd5.toString());
showFileInfo();
}
}

private void jButton2ActionPerformed(java.awt.event.ActionEventevt){
// TODOaddyourhandlingcodehere:
jButton2.setEnabled( false );
new Thread(){
public void run(){
Strings = Util.getMD5(toMd5,jpb);
jTextField2.setText(s);
jButton2.setEnabled( true );
}
}.start();
}

private void jButton3ActionPerformed(java.awt.event.ActionEventevt){
// TODOaddyourhandlingcodehere:
System.exit( 0 );
}

private void showFileInfo(){
if (toMd5 != null ){
SimpleDateFormatsdf = new SimpleDateFormat( " yyyy年MM月dd日HH:mm:ss " );
Filef = toMd5;
StringBuildersb = new StringBuilder();
sb.append( " 文件名称: " ).append(f.getName()).append( ' /n ' );
sb.append( " 文件大小: " ).append(f.length()).append( ' /n ' );
sb.append( " 文件最后修改日期: " ).append(sdf.format( new Date(f.lastModified()))).append( " /n " );
sb.append( " 文件属性: " ).append(f.canWrite() ? " 读写 " : " 只读 " ).append( ' /n ' );
jTextArea1.setText(sb.toString());
}
}
/**
* @param argsthecommandlinearguments
*/

public static void main(Stringargs[]){
java.awt.EventQueue.invokeLater( new Runnable(){

public void run(){
new Main().setVisible( true );
}
});
}
// Variablesdeclaration-donotmodify
private javax.swing.JButtonjButton1;
private javax.swing.JButtonjButton2;
private javax.swing.JButtonjButton3;
private javax.swing.JLabeljLabel1;
private javax.swing.JLabeljLabel2;
private javax.swing.JScrollPanejScrollPane1;
private javax.swing.JTextAreajTextArea1;
private javax.swing.JTextFieldjTextField1;
private javax.swing.JTextFieldjTextField2;
private javax.swing.JProgressBarjpb;
// Endofvariablesdeclaration

public void dragEnter(DropTargetDragEventdtde){
dtde.acceptDrag(DnDConstants.ACTION_COPY_OR_MOVE);
}

public void dragOver(DropTargetDragEventdtde){
}

public void dropActionChanged(DropTargetDragEventdtde){
}

public void dragExit(DropTargetEventdte){
}

public void drop(DropTargetDropEvente){
try {
if (e.isDataFlavorSupported(DataFlavor.javaFileListFlavor)){
Transferabletr = e.getTransferable();
e.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
@SuppressWarnings( " unchecked " )
java.util.List < File > list = (java.util.List < File > )tr.getTransferData(DataFlavor.javaFileListFlavor);
if (list.size() == 1 ){
Filef = list.get( 0 );
if (f.isFile()){
toMd5 = list.get( 0 );
this .showFileInfo();
jTextField1.setText(toMd5.toString());
}
}
e.dropComplete( true );
} else {
e.rejectDrop();
}
} catch (IOExceptionio){
io.printStackTrace();
e.rejectDrop();
} catch (UnsupportedFlavorExceptionufe){
ufe.printStackTrace();
e.rejectDrop();
}
}
}