Spring中的工具类有哪些

package com.baobaotao.io; import java.io.IOException; import java.io.InputStream; import org.springframework.core.io.ClassPathResource; import org.springframework.core.io.FileSystemResource; import org.springframework.core.io.Resource; public class FileSourceExample { public static void main(String[] args) { try { String filePath = "D:/masterSpring/chapter23/webapp/WEB-INF/classes/conf/file1.txt"; // ① 使用系统文件路径方式加载文件Resource res1 = new FileSystemResource(filePath); // ② 使用类路径方式加载文件Resource res2 = new ClassPathResource("conf/file1.txt"); InputStream ins1 = res1.getInputStream(); InputStream ins2 = res2.getInputStream(); System.out.println("res1:"+res1.getFilename()); System.out.println("res2:"+res2.getFilename()); } catch (IOException e) { e.printStackTrace(); } } }