Properties讀取properties配置文件

package cn.rocker.readProperties;

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

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

/**  
* @ClassName: PropertiesRead  
* @Description: Properties讀取配置文件  
* @author 112  
* @date 2018年3月28日 下午12:46:07 
*/ 
public class PropertiesRead {
    @Test
    /**   
     * @Description:  第一種方式：根據文件名使用spring中的工具類PropertiesLoaderUtils進行解析 
     *                filePath是相對路徑，文件需在classpath目錄下
     *                此處為：cn/rocker/readProperties/test/properties/cas.properties
     * @author czc   
     * @date 2018年3月28日 下午1:19:57 
     * @version V1.0   
     */
    public void PropertiesLoaderUtilsReadProperties(){
        Properties prop = null;
        String propertiesPath = "cn/rocker/readProperties/test/properties/cas.properties";
        try {
            prop = PropertiesLoaderUtils.loadAllProperties(propertiesPath);
            String url = prop.getProperty("UnifyUserManager_URL");
            System.out.println(url);
            //輸出：http://139.199.20:8080/sso/UnifyUserManager
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    @Test
    /**   
     * @Description: 這里貼一下getResourceAsStream方法的源碼注釋
     * Before delegation, an absolute resource name is constructed from 
     * the given resource name using this algorithm: 
       • If the name begins with a '/' ('\u002f'), then 
       the absolute name of the resource is the portion of the name following the '/'. 
       • Otherwise, the absolute name is of the following form: modified_package_name/name 
             如果getResourceAsStream的參數以"/"開始，則文件的絕對路徑就是/后面的部分
             如果getResourceAsStream的參數沒有以"/"開始,則文件的路徑跟操作文件的類在同一包路徑下
     * @author czc   
     * @date 2018年3月28日 下午1:36:34 
     * @version V1.0   
     */
    public void ResoueceStreamReadProperties(){
        Properties prop = new Properties();
        String propertiesPath1 = "cas1.properties";
        String propertiesPath2 = "/cas2.properties";
        String propertiesPaht3 = "/cn/rocker/readProperties/test/properties/cas3.properties";
        try {
            InputStream inputStream1 = PropertiesRead.class.getResourceAsStream(propertiesPath1);
            prop.load(inputStream1);
            String url1 = prop.getProperty("UnifyUserManager_URL");
            System.out.println("url1:" + url1);
            
            InputStream inputStream2 = PropertiesRead.class.getResourceAsStream(propertiesPath2);
            prop.load(inputStream2);
            String url2 = prop.getProperty("UnifyUserManager_URL");
            System.out.println("url2:" + url2);
            
            InputStream inputStream3 = PropertiesRead.class.getResourceAsStream(propertiesPaht3);
            prop.load(inputStream3);
            String url3 = prop.getProperty("UnifyUserManager_URL");
            System.out.println("url3:" + url3);
            
            //輸出：url1:http://139.199.20:8080/sso/UnifyUserManager
            //     url2:http://139.199.20:8080/sso/UnifyUserManager
            //     url3:http://139.199.20:8080/sso/UnifyUserManager
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}