读取系统属性

String   javaVersion     =   System.getProperty("java.version");  
String   javaVendor   =   System.getProperty("java.vendor");  
String   javaVendorUrl   =   System.getProperty("java.vendor.url");  
String   javaHome   =   System.getProperty("java.home");  
String   javaVmSpecificationVersion   =   System.getProperty("java.vm.specification.version");  
String   javaVmSpecificationVendor   =   System.getProperty("java.vm.specification.vendor");  
String   javaVmSpecificationName   =   System.getProperty("java.vm.specification.name");  
String   javaVmVersion   =   System.getProperty("java.vm.version");  
String   javaVmVendor   =   System.getProperty("java.vm.vendor");  
String   javaVmName   =   System.getProperty("java.vm.name");  
String   javaSpecificationVersion   =   System.getProperty("java.specification.version");  
String   javaSpecificationVendor   =   System.getProperty("java.specification.vendor");  
String   javaSpecificationName   =   System.getProperty("java.specification.name");  
String   javaClassVersion   =   System.getProperty("java.class.version");  
String   javaClassPath   =   System.getProperty("java.class.path");  
String   javaLibraryPath   =   System.getProperty("java.library.path");  
String   javaIoTmpdir   =   System.getProperty("java.io.tmpdir");  
String   javaCompiler   =   System.getProperty("java.compiler");  
String   javaExtDirs   =   System.getProperty("java.ext.dirs");  
String   osName   =   System.getProperty("os.name");  
String   osArch   =   System.getProperty("os.arch");  
String   osVersion   =   System.getProperty("os.version");  
String   fileSeparator   =   System.getProperty("file.separator");  
String   pathSeparator   =   System.getProperty("path.separator");  
String   lineSeparator   =   System.getProperty("line.separator");  
String   userName   =   System.getProperty("user.name");  
String   userHome   =   System.getProperty("user.home");  
String   userDir   =   System.getProperty("user.dir");  
String   encode   =   System.getProperty("file.encoding")

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--------------------------[sysModel]------------------
Set keyset = System.getProperties().keySet();

for(Iterator itr = keyset.iterator(); itr.hasNext();){

String key = (String)itr.next();
String val = System.getProperty(key);
logger.warn("[0718]----------->" + key + "<===========>" + val);

}
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测试用代码
---------------------------------------------
import java.util.Iterator;
import java.util.Set;

public class showcurr {

public static void main(String arg[]) {

Set keyset = System.getProperties().keySet();

for(Iterator itr = keyset.iterator(); itr.hasNext();){

String key = (String)itr.next();
String val = System.getProperty(key);
System.out.println("[0718]----------->" + key + "<===========>" + val);

}

}

}