`

Read/Write the Registry (Windows)

WindowsIEMicrosoftAccessAdobe
阅读更多
his technique was first seen in this post.

package com.rgagnon.howto;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.ArrayList;
import java.util.List;
import java.util.prefs.Preferences;

public class WinRegistry {
  // inspired by
  // http://javabyexample.wisdomplug.com/java-concepts/34-core-java/62-java-registry-wrapper.html
  // http://www.snipcode.org/java/1-java/23-java-class-for-accessing-reading-and-writing-from-windows-registry.html
  // http://snipplr.com/view/6620/accessing-windows-registry-in-java/
  public static final int HKEY_CURRENT_USER = 0x80000001;
  public static final int HKEY_LOCAL_MACHINE = 0x80000002;
  public static final int REG_SUCCESS = 0;
  public static final int REG_NOTFOUND = 2;
  public static final int REG_ACCESSDENIED = 5;

  private static final int KEY_ALL_ACCESS = 0xf003f;
  private static final int KEY_READ = 0x20019;
  private static Preferences userRoot = Preferences.userRoot();
  private static Preferences systemRoot = Preferences.systemRoot();
  private static Class<? extends Preferences> userClass = userRoot.getClass();
  private static Method regOpenKey = null;
  private static Method regCloseKey = null;
  private static Method regQueryValueEx = null;
  private static Method regEnumValue = null;
  private static Method regQueryInfoKey = null;
  private static Method regEnumKeyEx = null;
  private static Method regCreateKeyEx = null;
  private static Method regSetValueEx = null;
  private static Method regDeleteKey = null;
  private static Method regDeleteValue = null;

  static {
    try {
      regOpenKey = userClass.getDeclaredMethod("WindowsRegOpenKey",
          new Class[] { int.class, byte[].class, int.class });
      regOpenKey.setAccessible(true);
      regCloseKey = userClass.getDeclaredMethod("WindowsRegCloseKey",
          new Class[] { int.class });
      regCloseKey.setAccessible(true);
      regQueryValueEx = userClass.getDeclaredMethod("WindowsRegQueryValueEx",
          new Class[] { int.class, byte[].class });
      regQueryValueEx.setAccessible(true);
      regEnumValue = userClass.getDeclaredMethod("WindowsRegEnumValue",
          new Class[] { int.class, int.class, int.class });
      regEnumValue.setAccessible(true);
      regQueryInfoKey = userClass.getDeclaredMethod("WindowsRegQueryInfoKey1",
          new Class[] { int.class });
      regQueryInfoKey.setAccessible(true);
      regEnumKeyEx = userClass.getDeclaredMethod( 
          "WindowsRegEnumKeyEx", new Class[] { int.class, int.class, 
              int.class }); 
      regEnumKeyEx.setAccessible(true);
      regCreateKeyEx = userClass.getDeclaredMethod( 
          "WindowsRegCreateKeyEx", new Class[] { int.class, 
              byte[].class }); 
      regCreateKeyEx.setAccessible(true); 
      regSetValueEx = userClass.getDeclaredMethod( 
          "WindowsRegSetValueEx", new Class[] { int.class, 
              byte[].class, byte[].class }); 
      regSetValueEx.setAccessible(true);
      regDeleteValue = userClass.getDeclaredMethod( 
          "WindowsRegDeleteValue", new Class[] { int.class, 
              byte[].class }); 
      regDeleteValue.setAccessible(true);
      regDeleteKey = userClass.getDeclaredMethod( 
          "WindowsRegDeleteKey", new Class[] { int.class, 
              byte[].class }); 
      regDeleteKey.setAccessible(true);
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }
 
  private WinRegistry() {  }

  /**
   * Read a value from key and value name
   * @param hkey   HKEY_CURRENT_USER/HKEY_LOCAL_MACHINE
   * @param key
   * @param valueName
   * @return the value
   * @throws IllegalArgumentException
   * @throws IllegalAccessException
   * @throws InvocationTargetException
   */
  public static String readString(int hkey, String key, String valueName)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    if (hkey == HKEY_LOCAL_MACHINE) {
      return readString(systemRoot, hkey, key, valueName);
    }
    else if (hkey == HKEY_CURRENT_USER) {
      return readString(userRoot, hkey, key, valueName);
    }
    else {
      throw new IllegalArgumentException("hkey=" + hkey);
    }
  }

  /**
   * Read value(s) and value name(s) form given key
   * @param hkey  HKEY_CURRENT_USER/HKEY_LOCAL_MACHINE
   * @param key
   * @return the value name(s) plus the value(s)
   * @throws IllegalArgumentException
   * @throws IllegalAccessException
   * @throws InvocationTargetException
   */
  public static Map<String, String> readStringValues(int hkey, String key)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    if (hkey == HKEY_LOCAL_MACHINE) {
      return readStringValues(systemRoot, hkey, key);
    }
    else if (hkey == HKEY_CURRENT_USER) {
      return readStringValues(userRoot, hkey, key);
    }
    else {
      throw new IllegalArgumentException("hkey=" + hkey);
    }
  }

  /**
   * Read the value name(s) from a given key
   * @param hkey  HKEY_CURRENT_USER/HKEY_LOCAL_MACHINE
   * @param key
   * @return the value name(s)
   * @throws IllegalArgumentException
   * @throws IllegalAccessException
   * @throws InvocationTargetException
   */
  public static List<String> readStringSubKeys(int hkey, String key)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    if (hkey == HKEY_LOCAL_MACHINE) {
      return readStringSubKeys(systemRoot, hkey, key);
    }
    else if (hkey == HKEY_CURRENT_USER) {
      return readStringSubKeys(userRoot, hkey, key);
    }
    else {
      throw new IllegalArgumentException("hkey=" + hkey);
    }
  }

  /**
   * Create a key
   * @param hkey  HKEY_CURRENT_USER/HKEY_LOCAL_MACHINE
   * @param key
   * @throws IllegalArgumentException
   * @throws IllegalAccessException
   * @throws InvocationTargetException
   */
  public static void createKey(int hkey, String key)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    int [] ret;
    if (hkey == HKEY_LOCAL_MACHINE) {
      ret = createKey(systemRoot, hkey, key);
      regCloseKey.invoke(systemRoot, new Object[] { new Integer(ret[0]) });
    }
    else if (hkey == HKEY_CURRENT_USER) {
      ret = createKey(userRoot, hkey, key);
      regCloseKey.invoke(userRoot, new Object[] { new Integer(ret[0]) });
    }
    else {
      throw new IllegalArgumentException("hkey=" + hkey);
    }
    if (ret[1] != REG_SUCCESS) {
      throw new IllegalArgumentException("rc=" + ret[1] + "  key=" + key);
    }
  }

  /**
   * Write a value in a given key/value name
   * @param hkey
   * @param key
   * @param valueName
   * @param value
   * @throws IllegalArgumentException
   * @throws IllegalAccessException
   * @throws InvocationTargetException
   */
  public static void writeStringValue
    (int hkey, String key, String valueName, String value)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    if (hkey == HKEY_LOCAL_MACHINE) {
      writeStringValue(systemRoot, hkey, key, valueName, value);
    }
    else if (hkey == HKEY_CURRENT_USER) {
      writeStringValue(userRoot, hkey, key, valueName, value);
    }
    else {
      throw new IllegalArgumentException("hkey=" + hkey);
    }
  }

  /**
   * Delete a given key
   * @param hkey
   * @param key
   * @throws IllegalArgumentException
   * @throws IllegalAccessException
   * @throws InvocationTargetException
   */
  public static void deleteKey(int hkey, String key)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    int rc = -1;
    if (hkey == HKEY_LOCAL_MACHINE) {
      rc = deleteKey(systemRoot, hkey, key);
    }
    else if (hkey == HKEY_CURRENT_USER) {
      rc = deleteKey(userRoot, hkey, key);
    }
    if (rc != REG_SUCCESS) {
      throw new IllegalArgumentException("rc=" + rc + "  key=" + key);
    }
  }

  /**
   * delete a value from a given key/value name
   * @param hkey
   * @param key
   * @param value
   * @throws IllegalArgumentException
   * @throws IllegalAccessException
   * @throws InvocationTargetException
   */
  public static void deleteValue(int hkey, String key, String value)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    int rc = -1;
    if (hkey == HKEY_LOCAL_MACHINE) {
      rc = deleteValue(systemRoot, hkey, key, value);
    }
    else if (hkey == HKEY_CURRENT_USER) {
      rc = deleteValue(userRoot, hkey, key, value);
    }
    if (rc != REG_SUCCESS) {
      throw new IllegalArgumentException("rc=" + rc + "  key=" + key + "  value=" + value);
    }
  }

  // =====================

  private static int deleteValue
    (Preferences root, int hkey, String key, String value)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    int[] handles = (int[]) regOpenKey.invoke(root, new Object[] {
        new Integer(hkey), toCstr(key), new Integer(KEY_ALL_ACCESS) });
    if (handles[1] != REG_SUCCESS) {
      return handles[1];  // can be REG_NOTFOUND, REG_ACCESSDENIED
    }
    int rc =((Integer) regDeleteValue.invoke(root, 
        new Object[] {
          new Integer(handles[0]), toCstr(value)
          })).intValue();
    regCloseKey.invoke(root, new Object[] { new Integer(handles[0]) });
    return rc;
  }

  private static int deleteKey(Preferences root, int hkey, String key)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    int rc =((Integer) regDeleteKey.invoke(root, 
        new Object[] { new Integer(hkey), toCstr(key) })).intValue();
    return rc;  // can REG_NOTFOUND, REG_ACCESSDENIED, REG_SUCCESS
  }

  private static String readString(Preferences root, int hkey, String key, String value)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    int[] handles = (int[]) regOpenKey.invoke(root, new Object[] {
        new Integer(hkey), toCstr(key), new Integer(KEY_READ) });
    if (handles[1] != REG_SUCCESS) {
      return null;
    }
    byte[] valb = (byte[]) regQueryValueEx.invoke(root, new Object[] {
        new Integer(handles[0]), toCstr(value) });
    regCloseKey.invoke(root, new Object[] { new Integer(handles[0]) });
    return (valb != null ? new String(valb).trim() : null);
  }

  private static Map<String,String> readStringValues
    (Preferences root, int hkey, String key)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    HashMap<String, String> results = new HashMap<String,String>();
    int[] handles = (int[]) regOpenKey.invoke(root, new Object[] {
        new Integer(hkey), toCstr(key), new Integer(KEY_READ) });
    if (handles[1] != REG_SUCCESS) {
      return null;
    }
    int[] info = (int[]) regQueryInfoKey.invoke(root,
        new Object[] { new Integer(handles[0]) });

    int count = info[2]; // count 
    int maxlen = info[3]; // value length max
    for(int index=0; index<count; index++)  {
      byte[] name = (byte[]) regEnumValue.invoke(root, new Object[] {
          new Integer
            (handles[0]), new Integer(index), new Integer(maxlen + 1)});
      String value = readString(hkey, key, new String(name));
      results.put(new String(name).trim(), value);
    }
    regCloseKey.invoke(root, new Object[] { new Integer(handles[0]) });
    return results;
  }

  private static List<String> readStringSubKeys
    (Preferences root, int hkey, String key)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    List<String> results = new ArrayList<String>();
    int[] handles = (int[]) regOpenKey.invoke(root, new Object[] {
        new Integer(hkey), toCstr(key), new Integer(KEY_READ)
        });
    if (handles[1] != REG_SUCCESS) {
      return null;
    }
    int[] info = (int[]) regQueryInfoKey.invoke(root,
        new Object[] { new Integer(handles[0]) });

    int count = info[2]; // count 
    int maxlen = info[3]; // value length max
    for(int index=0; index<count; index++)  {
      byte[] name = (byte[]) regEnumKeyEx.invoke(root, new Object[] {
          new Integer
            (handles[0]), new Integer(index), new Integer(maxlen + 1)
          });
      results.add(new String(name).trim());
    }
    regCloseKey.invoke(root, new Object[] { new Integer(handles[0]) });
    return results;
  }

  private static int [] createKey(Preferences root, int hkey, String key)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    return  (int[]) regCreateKeyEx.invoke(root,
        new Object[] { new Integer(hkey), toCstr(key) });
  }

  private static void writeStringValue
    (Preferences root, int hkey, String key, String valueName, String value)
    throws IllegalArgumentException, IllegalAccessException,
    InvocationTargetException
  {
    int[] handles = (int[]) regOpenKey.invoke(root, new Object[] {
        new Integer(hkey), toCstr(key), new Integer(KEY_ALL_ACCESS) });

    regSetValueEx.invoke(root, 
        new Object[] {
          new Integer(handles[0]), toCstr(valueName), toCstr(value)
          });
    regCloseKey.invoke(root, new Object[] { new Integer(handles[0]) });
  }

  // utility
  private static byte[] toCstr(String str) {
    byte[] result = new byte[str.length() + 1];

    for (int i = 0; i < str.length(); i++) {
      result[i] = (byte) str.charAt(i);
    }
    result[str.length()] = 0;
    return result;
  }
}

How to use it :

package com.rgagnon.howto;

public class WinRegistryTest {
  public static void main(String args[]) throws Exception {
      String value = "";

      // IE Download directory (HKEY_CURRENT_USER)
      value = WinRegistry.readString(
          WinRegistry.HKEY_CURRENT_USER,
          "Software\\Microsoft\\Internet Explorer",
          "Download Directory");
      System.out.println("IE Download directory = " + value);

      // Query for Acrobat Reader installation path (HKEY_LOCAL_MACHINE)
      value = WinRegistry.readString(
          WinRegistry.HKEY_LOCAL_MACHINE,
          "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\AcroRd32.exe",
          "");
      System.out.println("Acrobat Reader Path = " + value);

      // Loop through installed JRE and print the JAVA_HOME value
      // HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment
      java.util.Map res1 = WinRegistry.readStringValues(
          WinRegistry.HKEY_LOCAL_MACHINE,
          "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion");
      System.out.println(res1.toString());
     
      java.util.List res2 = WinRegistry.readStringSubKeys(
          WinRegistry.HKEY_LOCAL_MACHINE,
          "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion");
      System.out.println(res2.toString());

      WinRegistry.createKey(
          WinRegistry.HKEY_CURRENT_USER, "SOFTWARE\\rgagnon.com");
      WinRegistry.writeStringValue(
          WinRegistry.HKEY_CURRENT_USER,
          "SOFTWARE\\rgagnon.com",
          "HowTo",
          "java");
     
//      WinRegistry.deleteValue(
//          WinRegistry.HKEY_CURRENT_USER,
//          "SOFTWARE\\rgagnon.com", "HowTo");
//      WinRegistry.deleteKey(
//          WinRegistry.HKEY_CURRENT_USER,
//          "SOFTWARE\\rgagnon.com\\");
     
      System.out.println("Done." );
  }
}


The output :

IE Download directory = C:\Documents and Settings\R閍l\Bureau
Acrobat Reader Path = C:\Program Files\Adobe\Acrobat 5.0\Reader\AcroRd32.exe
{SubVersionNumber=, CurrentBuild=1.511.1 () (snipped)...
[Accessibility, AeDebug, Asr, Classes, Compatibility, (snipped)...
Done.

分享到：
| invoke google api demo
评论
发表评论

您还没有登录,请您登录后再发表评论

相关推荐

    VB.example.code.read.write.registry.rar_vb 注册表

    VB注册表读写实例代码VB example code to read and write registry

    Great .Bas Module file which can enables you to Read Write I

    Great .Bas Module file which can enables you to Read Write INI files Read Write the Registry a Numerical Encrypter Decrypter which will encrypt strings of data into numbers and back and a customizable...

    Read and Write Values from and to the Registry using Matlab:Read and Write Values from and to the Registry using Matlab-matlab开发

    使用 Matlab 从和向注册表读取和写入值。 包含：源代码和文档。 2006 年 9 月 13 日

    S7A驱动720版本

    - The string write from the OPC Server sometimes failed . This bug has been fixed - After driver uninstall, not all of the S7A-related registry entries were deleted. Now the registry will be ...

    Windows Internals-Fourth Edition.chm

    Read Ahead and Write Behind Conclusion Chapter 12. File Systems Windows File System Formats File System Driver Architecture Troubleshooting File System Problems NTFS Design Goals and ...

    微软内部资料-SQL性能优化2

    The diagram included at the top represents the address partitioning for the 32-bit version of Windows 2000. Typically, the process address space is evenly divided into two 2-GB regions. Each process...

    Microsoft Windows 7 In Depth.pdf

    Thank you for purchasing or considering the purchase of Windows 7 In Depth. It’s amazing the changes that 20-odd years can bring to a com- puter product such as Windows. When we wrote our first ...

    ICSharpCode.SharpZipLib.dll

    string directoryName = Path.GetDirectoryName(theEntry.Name); string fileName = Path.GetFileName(theEntry.Name); if (directoryName != String.Empty) { Directory.CreateDirectory(dir + directoryName)...

    Kryo的Clojure移植版本carbonite.zip

    (write-buffer registry b my-data)) ;; Rewind buffer back to the beginning (.rewind b) ;; Deserialize buffer back to Clojure data (def c (read-buffer registry b))) 标签：...

    Profile

    Read-Write XML files, Config files, INI files, or the Registry

    VC 注册表类 CRegistry

    #ifndef __REGISTRY_H__ #define __REGISTRY_H__ class CRegistry { public: CRegistry(); ~CRegistry(); int m_nLastError; // CRegistry properties protected: HKEY m_hRootKey; BOOL m_bLazyWrite; ...

    CoreOS.Essentials.1785283944

    You will also see how to set up and use CoreUpdate and Enterprise Registry, and get an introduction to the new App Container called rkt and the newly introduced cluster manager known as Kubernetes. ...

    VB编程资源大全（英文源码 控制）

    This demonstrates most of the event procedures of the CM Dialog control.&lt;END&gt;&lt;br&gt;27 , campbell-reg.zip This demonstrates how to write and retrieve information from the registry.&lt;END&gt;&lt;br&gt;28 , ...

    Internal EEProm Driver ( Macro driver )

    Read Byte from internal eeprom ( address in X,Y or Z ),data can be in R0 to R31 except registry used by adress _MRWEEPROM X,R0;Write Byte to internal eeprom ( address in X,Y or Z ),data can be in R0 ...

    Senfore_DragDrop_v4.1

    The library has been tested on NT4 service pack 5 and Windows 2000. Windows 95, 98, ME and XP should be supported, but has not been tested. Linux and Kylix are not supported. There are *NO* plans to ...

    acpi控制笔记本风扇转速

    Optimized the Load ASL operator in the case where the source operand is an operation region. Simply map the operation region memory, instead of performing a bytewise read. (Region must be of type ...

    BobBuilder_app

    I had to write a new article because in this version I completely redesigned and re-architected the original and so it would not go with the previous article. In this version I have done away with ...

    EhLib 9.1.038 for D7-XE-10.2

    Component with the ability to save or read the properties of the ini files, registry and … TMemTableEh: To store data in memory. It is also possible to consider the form of an array of records. ...

    delphi 2007 第三方补丁

    - Fixed: C++Builder compilation slow down caused by the ReadWrite mode fix - Fixed: DBGrid ScrollBar gab wasn't painted correctly in BiDiMode &lt;&gt; bdLeftToRight - Fixed: TTabSheet could throw an ...

    Python Cookbook英文版

    7.9 Examining the Microsoft Windows Registry for a List of Name Server Addresses 7.10 Getting Information About the Current User on Windows NT/2000 7.11 Getting the Windows Service Name from ...

Magicbox
Global site tag (gtag.js) - Google Analytics