properties文件工具类

最近因为要使用到properties文件，所以写了个工具类。对它进行读取操作。

1. properties文件内容

name=jasonage:1222person:JAKE

1. 工具类代码

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 * 2017.05.28  */  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());      }  }