package com.test.test;

import java.io.BufferedInputStream;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.io.UnsupportedEncodingException;

import java.util.Enumeration;

import java.util.Locale;

import java.util.Properties;

import java.util.PropertyResourceBundle;

import java.util.ResourceBundle;

import org.springframework.core.io.support.PropertiesLoaderUtils;

public class TestProperties {

    private static TestProperties testProperties = new TestProperties();

    public static void main(String[] args) {

        //获取properties配置文件中的值

        Properties prop = new Properties();

        try {

            prop.load(test1());//包含2种方法

            prop.load(test2());//包含2种方法

            prop.load(testProperties.test3());//包含2种方法

            //使用spring-core包封装好的方法

            prop = PropertiesLoaderUtils.loadAllProperties("test.properties");

            Enumeration<?> e = prop.propertyNames();

            while (e.hasMoreElements()) {

                String key = (String) e.nextElement();

                System.out.println(key+"="+new String(prop.getProperty(key).getBytes("ISO-8859-1"),"UTF-8"));

            }

            test4();

            test5();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

    /**

     * 使用FileInputStream文件输入流

     * @return

     */

    public static InputStream test1(){

        InputStream in = null;

        try {

            //此处是相对于项目的相对路径

            //in = new FileInputStream("src/main/resources/test.properties");

            //或

            in = new BufferedInputStream(new FileInputStream("src/main/resources/test.properties"));

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        }

        return in;

    }

    /**

     * 使用ClassLoader

     * 默认从classPath路径下找文件

     * @return

     */

    public static InputStream test2(){

        //InputStream in = ClassLoader.getSystemResourceAsStream ("test.properties");

        //或

        InputStream in = testProperties.getClass().getClassLoader().getResourceAsStream("test.properties");

        return in;

    }

    /**

     * 使用class变量的getResourceAsStream()方法

     * 文件名前不加“/”，则表示从当前类所在的包下查找该资源

     * 文件名前加了“/”，则表示从classPath路径下查找资源

     * @return

     */

    public InputStream test3(){

        //InputStream in = getClass().getResourceAsStream("/test.properties");

        //或

        InputStream in = TestProperties.class.getResourceAsStream("/test.properties");

        return in;

    }

    /**

     * 使用java.util.ResourceBundle类的getBundle()方法

     * Locale.getDefault()：没有提供语言和地区的资源文件是系统默认的资源文件

     * test：不需要文件的后缀

     */

    public static void test4(){

        try {

            ResourceBundle rb = ResourceBundle.getBundle("test", Locale.getDefault());

            Enumeration<String> e1 = rb.getKeys();

            while (e1.hasMoreElements()) {

                String key = e1.nextElement();

                System.out.println(key+"="+new String(rb.getString(key).getBytes("ISO-8859-1"),"UTF-8"));

            }

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

        }

    }

    /**

     * 使用java.util.PropertyResourceBundle类的构造函数

     */

    public static void test5(){

        InputStream in = ClassLoader.getSystemResourceAsStream ("test.properties");

        try {

            ResourceBundle rb = new PropertyResourceBundle(in);

            Enumeration<String> e1 = rb.getKeys();

            while (e1.hasMoreElements()) {

                String key = e1.nextElement();

                System.out.println(key+"="+new String(rb.getString(key).getBytes("ISO-8859-1"),"UTF-8"));

            }

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

name=天若有情

password=天亦老