java读取文件propeties...

来源：互联网发布：淘宝助理怎样删除宝贝编辑：程序博客网时间：2024/05/18 17:26

相当郁闷 ,看编译的路径文件存在,但总报错,解决了,现在记录一下,希望下次不要这样纠结了 .

1.方法一InputStream fis =TestProperties.class.getClassLoader().getResourceAsStream("init.properties")

2.方法二(要求TestProperties和init.properties在同一目录下)InputStream fis =TestProperties.class.getResourceAsStream("init.properties")

3.方法三，对于Web工程也可以这样。先获取ServletContext,然后InputStream in=context.getResourceAsStream("/WEB-INF/classes/init.properties");

读取类源码---------

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class Configuration {
private static Configuration configuration = null;
private static Properties properties = null;
private static final String CONFIG_FILE = "config.propeties";

private Configuration() {
  try {
   InputStream fis = Configuration.class
     .getResourceAsStream(CONFIG_FILE);
   properties = new Properties();
   properties.load(fis);
  } catch (IOException e) {
   // TODO Auto-generated catch block
   System.out.println("找不到指定文件!" + CONFIG_FILE);
   e.printStackTrace();
  }

}

public synchronized static Configuration getInstance() {
  if (null == configuration) {
   configuration = new Configuration();
  }
  return configuration;
}

public String getValue(String key) {
return properties.getProperty(key);
}

public static void main(String[] args) {
String va = Configuration.getInstance().getValue("CURRENT_PASSWORD");
System.out.println(va);
}
}