package com.ygh.blog.realpath;

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

/**
 * 獲取java下面的路徑的演示
 */
import org.junit.Test;

public class RealPathTest {

 /**
 * 獲取當(dāng)前類所在的工程路徑
 */
 @Test
 public void fun1() {
 File file = new File(this.getClass().getResource("/").getPath());
 // D:\project\taotaoshop\src\blog-mybatis1\target\test-classes
 System.out.println(file);
 }

 /**
 * 獲取當(dāng)前類的絕對(duì)路徑
 */
 @Test
 public void fun2() {
 File file = new File(this.getClass().getResource("").getPath());
 // D:\project\taotaoshop\src\blog-mybatis1\target\test-classes\com\ygh\blog\realpath
 System.out.println(file);
 }

 /**
 * 獲取當(dāng)前類所在的工程路徑，兩種方法皆可
 * 
 * @throws IOException
 */
 @Test
 public void fun3() throws IOException {
 File file = new File("");
 String path = file.getCanonicalPath();
 // D:\project\taotaoshop\src\blog-mybatis1
 System.out.println(path);
 // D:\project\taotaoshop\src\blog-mybatis1
 System.out.println(System.getProperty("user.dir"));
 }

 /**
 * 獲取當(dāng)前src下面的文件的路徑
 */
 @Test
 public void fun4() {
 URL url = this.getClass().getClassLoader().getResource("jdbc.properties");
 System.out.println(url);
 }

 /**
 * 獲取其他源碼包下面的文件路徑
 */
 @Test
 public void fun5() {
 // 使用這種方法可以獲取路徑
 URL url = this.getClass().getClassLoader().getResource("test2.txt");
 // file:/D:/project/taotaoshop/src/blog-mybatis1/target/classes/test.txt
 System.out.println(url);
 }

 @Test
 public void fun6() throws Exception {
 URL url = this.getClass().getClassLoader().getResource("test2.txt");
 System.out.println(url.getPath());
 Properties properties = new Properties();
 // 使用這種方式可以獲取文件對(duì)應(yīng)的輸出流
 InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("jdbc.properties");
 properties.load(inputStream);
 File file = new File(url.getPath());
 System.out.println(properties.get("jdbc.driverClassName"));
 }

}