tousleutil.java

来自「mywork是rcp开发的很好的例子」· Java 代码 · 共 50 行

package net.sf.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;

public final class TousleUtil {

	//拷贝输入输出
	public static void copyIntput2Output(InputStream is, OutputStream os) throws IOException {
	    byte[] buffer = new byte[1024];
	    int bytesRead = 0;
	    try {
	        if (is == null || os == null) {
	            throw new IllegalArgumentException("Specified resource does not exist: " + is + "or" + os + ".");
	        }
	        do {
	            bytesRead = is.read(buffer);
	            if (bytesRead > 0) {
	                os.write(buffer, 0, bytesRead);
	            }
	        } while (bytesRead > 0);
	    } finally {
	        if (is != null) {
	            is.close();
	        }
	        if (os != null) {
	            os.close();
	        }
	    }
	}

	//获取某个对象的私有属性，设置class参数是为了使用父类
	public static Object getPrivateProperty(Object obj,String propertyName){
		return getPrivateProperty(obj,propertyName,obj.getClass());
	}

	public static Object getPrivateProperty(Object obj,String propertyName,Class clazz){
		try {
			Field declaredField = clazz.getDeclaredField(propertyName);
			declaredField.setAccessible(true);
			return declaredField.get(obj);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
}