闲来无事写一个propertiesUtile工具类

      

废话不多说，贴上代码在说  有兴趣的朋友给我优化下 

import java.io.File; 
import java.io.FileOutputStream; 
import java.io.InputStream; 
import java.util.Properties; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import org.apache.commons.logging.Log; //公共的日志记录
import org.apache.commons.logging.LogFactory; //日志记录Factory

/** 
* Properties工具类 
* @author lzx
* 2016.08.24 
*/ 
public class PropertiesUtil { 
private static final Log log = LogFactory.getLog(PropertiesUtil.class); 
private static Properties env = new Properties(); 
private static String fileProperties; //文件名
PropertiesUtil(){} //空的构造方法
//参数实例化类时 fileProperties为要读的文件名 
PropertiesUtil(String fileProperties){
this.fileProperties=fileProperties;

try { 
InputStream is = PropertiesUtil.class.getClassLoader().getResourceAsStream(fileProperties); 
env.load(is); 
is.close(); 
} catch (Exception e) { 
log.error(e); 
} 
}



/** 
* 取属性值 
* @param key 
* @return 
*/ 
public static String getProperty(String key){ 
return env.getProperty(key); 
} 

/** 
* 设置属性值 
* @param key 
* @param value 
*/ 
public static void setProperty(String key, String value){ 
try{ 
File file = new File(PropertiesUtil.class.getClassLoader().getResource(".").getPath()+File.separator+fileProperties); 
FileOutputStream outStream = new FileOutputStream(file); 
env.setProperty(key, value); 
//写入properties文件 
env.store(outStream, null); 
} catch (Exception ex) { 
log.error(ex); 
} 
} 

public static void main(String[] args) { 
// TODO Auto-generated method stub 
System.out.println(new PropertiesUtil("system.properties").getProperty("man")); 
// new PropertiesUtil("system.properties").setProperty("age","liaozexu");
//System.out.println(PropertiesUtil.class.getClassLoader().getResource(".").getPath()); 
} 
}