/** 
 * @Title: ReadProperties.java
 * @Package util
 * @Description: TODO
 * @author zhanjp
 * @date 2016年7月29日
 */
package util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Properties;

/**
 * ClassName: ReadProperties 
 * @Description: TODO
 * @author zhanjp
 * @date 2016年7月29日
 */
public class ReadProperties {

	public static String read(String fileName, String key){
		String basePath = new ReadProperties().getClass().getClassLoader().getResource("/").getPath();
		String filePath = basePath+fileName;
		return getValue(filePath, key);
	}
	
	public static String getValue(String filePath, String key){
		try {
			Properties props = new Properties();
			File config = new File(filePath);
			if(config.exists() == false)
			{
				return null;
			}
			InputStream in = new FileInputStream(config);
			props.load(in);
			return (String) props.get(key);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}		
	}
	
 public static boolean setValue(String filePath, String key, String value){
 	boolean ret = false;
 FileOutputStream fileOutputStream = null;
 try {
			Properties props = new Properties();
			File config = new File(filePath);
			InputStream in = new FileInputStream(config);
			props.load(in);
			props.setProperty(key, value);
 	
 fileOutputStream = new FileOutputStream(filePath);
 props.store(fileOutputStream, "");
 ret = true;
 } catch (Exception e) {
 e.printStackTrace();
 } finally {
 try {
 if (null != fileOutputStream){
 fileOutputStream.close();
 }
 } catch (Exception e) {
 System.out.println("文件流关闭出现异常");
 }
 }
 return ret;
 }
}