JAVA读取Properties文档的两种常用方式

package com.wise;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import java.util.Properties;
import java.util.ResourceBundle;

public class TestProperties {

 //the properties file 's name is test.properties,its filePath is the same as javaFile

//and the  content of the properties file is

// "i_am_key=i_am_value"
 public static void main(String[] args) {
  readPropertiesMethod1("/test.properties");
 }
 public static void readPropertiesMethod1(String filename){
  Properties pro = new Properties();
  try {
   InputStream is = TestProperties.class.getResourceAsStream("/test.properties");
   pro.load(is);
   String value = pro.getProperty("i_am_key");
   System.out.println(value);
  } catch (IOException e) {
   
  }
 }
 public static void readPropertiesMethod2(String filename){
  ResourceBundle rb = ResourceBundle.getBundle("test",Locale.getDefault());
  String value = rb.getString("i_am_key");
  System.out.println(value);
 }
}