JAVA对WINDOWS注册表进行增删查

代码描述
用java对windows注册表进行编辑是一个比较困难的任务，因为java的平台无关性。但是java提供了Runtime类，它允许把原始的command命令直接发生送给OS，所以可以通过这个类来实现对注册表简单有效的管理。
这里允许的基本功能是添加、删除和查询注册表信息。根据key查询出value和type分别存放在不同的变量中。

//主要的方法
add(String location, String key, String type, String value);
delete(String location, String key);
query(String location, String key);

//查询消息用到的方法
getKey() => 检索的key名.
getValue() => 根据key得到的value
getType() => 根据key得到的数据类型 (REG_SZ, REG_BINARY, 等)

调用方法
例：

 

public static void main(String[] args) {
        try {
            RegKeyManager rkm = new RegKeyManager();
//            64位系统的注册表目录
//            rkm.query("HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Tencent\\QQ2009", "Install");
//            32位系统的注册表目录
            rkm.query("HKEY_LOCAL_MACHINE\\SOFTWARE\\Tencent\\QQ2009", "Install");
            System.out.println("KEY: " + rkm.getKey() + " DATA TYPE: " + rkm.getType() + " DATA VALUE: " + rkm.getValue());
//            rkm.add("HKEY_LOCAL_MACHINE\\SOFTWARE\\Tencent\\QQ2009","TESTING","REG_SZ","VALUE DATA");
//            rkm.delete("HKEY_LOCAL_MACHINE\\SOFTWARE\\Tencent\\QQ2009","TESTING");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

注：64位系统注册表路径是不同的上面的代码实现了在qq的注册表路径下查询出qq的安装路径（对于获取QQ的安装路径前段时间写过一篇类似的文章，如果你感兴趣的话可以参看JAVA通过注册表获取软件的安装路径），在安装路径下添加一个注册表信息，然后删除添加的信息。

 

 

package info.itlanguageexpress.java;
import java.io.*;
public class RegKeyManager {
    private final String TYPES[] = { "SZ", "BINARY", "DWORD", "QWORD", "DWORD_LITTLE_ENDIAN", "QWORD_LITTLE_ENDIAN", "DWORD_BIG_ENDIAN", "EXPAND_SZ", "LINK", "MULTI_SZ", "NONE", "RESOURCE_LIST" };
    private String type = "", value = "", key = "";
    protected void query(String loc, String k) throws Exception {
        Process p = Runtime.getRuntime().exec("reg QUERY \"" + loc + "\" /v \"" + k + "\"");
        BufferedReader in = new BufferedReader( new InputStreamReader( p.getInputStream() ) );
        String out = "";
        while ( ( out = in.readLine() ) != null ) {
            if (out.matches("(.*)\\s+REG_(.*)")) { break; }
        }
        in.close();
        String str[] = out.split("    ");
        int b = 0;
        for (int a=0; a < str.length; a++) {
            if ( str[a].replace(" ", "").matches("\\S+") ) {
                switch (b) {
                    case 0: key = str[a]; break;
                    case 1: type = str[a]; break;
                    case 2: value = str[a]; break;
                }
                b++;
            }
        }
    }
    protected String getKey() { return key; }
    protected String getType() { return type; }
    protected String getValue() { return value; }
    protected boolean add(String loc, String name, String dType, String value) throws Exception {
        boolean comp = false, valid = false;
        for (int a = 0; a < TYPES.length; a++) {
            if (dType.equalsIgnoreCase("REG_" + TYPES[a])) { valid = true; break; }
        }
        if ( valid ) {
            Process p = Runtime.getRuntime().exec("reg ADD \"" + loc + "\" /v \"" + name + "\" /t \"" + dType + "\" /d \"" + value + "\"");
            BufferedReader in = new BufferedReader( new InputStreamReader( p.getInputStream() ) );
            String out = "";
            while ( (out = in.readLine() ) != null ) {
                if (out.equalsIgnoreCase("The operation completed successfully.")) { comp = true; }
            }
            in.close();
        }
        return comp;
    }
    protected boolean delete(String loc, String key) throws Exception {
        boolean comp = false;
        Process p = Runtime.getRuntime().exec("reg DELETE \"" + loc + "\" /v \"" + key + "\" /f");
        BufferedReader in = new BufferedReader( new InputStreamReader( p.getInputStream() ) );
        String out = "";
        while ( ( out = in.readLine() ) != null ) {
            if (out.equalsIgnoreCase("The operation completed successfully.")) { comp = true; }
        }
        in.close();
        return comp;
    }
}

文章来自本人的个人博客：http://www.itlanguageexpress.info