jspenv.java

Eclipse编程技术与实例一书的附CD-ROM光盘

/*
 * 创建日期 2005-7-29
 *
 * TODO 要更改此生成的文件的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
package test;

import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;

/**
 * @author YE
 * 
 * TODO 要更改此生成的类型注释的模板，请转至 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
public class JSPEnv {

	private Hashtable param;

	public JSPEnv() {
		this.param = new Hashtable();
		setHashtable();
	}

	/**
	 * @author YE
	 * 
	 * setHashtable()用来初始化param，用服务器上的相关信息填充这个Hashtable；
	 *  
	 */
	private void setHashtable() {
		Properties sys = System.getProperties();
		Enumeration sys_name = sys.propertyNames();
		while (sys_name.hasMoreElements()) {
			String strKey = (String) sys_name.nextElement();
			String strValue = sys.getProperty(strKey);
			param.put(strKey, strValue);
		}
	}

	/**
	 * 以下为public的方法，它们是jsp网页用来得到服务器的参数，它们不需要任何参数。
	 */
	public String getJVersion() {
		return (String) param.get("java.version");
	}

	public String getJVendor() {
		return (String) param.get("java.vendor");
	}

	public String getOs() {
		String name = (String) param.get("os.name");
		String version = (String) param.get("os.version");
		String model = (String) param.get("sun.os.patch.level");
		return (name + " " + version + " " + model);
	}

	public String getOsArch() {
		return (String) param.get("os.arch");
	}

	public String getOsModel() {
		return (String) param.get("sun.arch.data.model");
	}

	public String getUCountry() {
		return (String) param.get("user.country");
	}

	public String getULanguage() {
		return (String) param.get("user.language");
	}

	public String getUTimeZone() {
		return (String) param.get("user.timezone");
	}

	public String getUName() {
		return (String) param.get("user.name");
	}

	public String getUDir() {
		return (String) param.get("user.dir");
	}

	public String getJavaRuntime() {
		String name = (String) param.get("java.runtime.name");
		String version = (String) param.get("java.runtime.version");

		return (name + " " + version);
	}

	public String getJavaSpec() {
		String name = (String) param.get("java.specification.name");
		String version = (String) param.get("java.specification.version");

		return (name + " " + version);
	}

	public String getJVM() {
		String name = (String) param.get("java.vm.name");
		String version = (String) param.get("java.vm.version");

		return (name + " " + version);
	}

	public String getJVMSpec() {
		String name = (String) param.get("java.vm.specification.name");
		String version = (String) param.get("java.vm.specification.version");

		return (name + " " + version);
	}
}