配置文件读取实现方法

package com.ccse.core.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.util.Properties;

public class PropertiesUtil {
/**
* get properties from file
* @param filename include the fullpath ,for example: d:/abc.properties
* @param encode
* @return
*/
public static Properties getFromFile(String filename,String encode){
FileInputStream fis=null;
Properties props=new Properties();
Reader reader=null;
try{
fis=new FileInputStream(filename);
reader = new InputStreamReader(fis, encode);
props.load(reader);
}catch(Exception ex){
ex.printStackTrace();
}finally{
try{
if(reader!=null)reader.close();
if(fis!=null) fis.close();
}catch(Exception e){}
}
return props;
}

/**
* get properties from file,default encode is utf-8
* @param filename include the fullpath ,for example: d:/abc.properties
* @return
*/
public static Properties getFromFile(String filename){
return getFromFile(filename,"UTF-8");
}

/**
* write the key to file
* @param filename include the fullpath ,for example: d:/abc.properties
* @param key
* @param value
*/
public static void writeKey(String filename,String key,String value){
Properties orgProps=getFromFile(filename);
orgProps.setProperty(key, value);
try{
OutputStream outStream=new FileOutputStream(new File(filename));
orgProps.store(outStream, "set");
}catch(Exception ex){
ex.printStackTrace();
}
}

}