java(包括springboot)读取resources下文件方式实现

File file = new File("src/main/resources/resource.properties");

@Test
 public void testReadFile2() throws IOException {
  File file = new File("src/main/resources/resource.properties");
  FileInputStream fis = new FileInputStream(file);
  InputStreamReader isr = new InputStreamReader(fis);
  BufferedReader br = new BufferedReader(isr);
  String data = null;
  while((data = br.readLine()) != null) {
   System.out.println(data);
  }
  
  br.close();
  isr.close();
  fis.close();
 }

File file = ResourceUtils.getFile("classpath:resource.properties");
FileInputStream fis = new FileInputStream(file);

@Test
 public void testReadFile3() throws IOException {
  File file = ResourceUtils.getFile("classpath:resource.properties");
  FileInputStream fis = new FileInputStream(file);
  InputStreamReader isr = new InputStreamReader(fis);
  BufferedReader br = new BufferedReader(isr);
  String data = null;
  while((data = br.readLine()) != null) {
   System.out.println(data);
  }
  
  br.close();
  isr.close();
  fis.close();
 }

Resource resource = new ClassPathResource("resource.properties");
InputStream is = resource.getInputStream();

@Test
 public void testReadFile() throws IOException {
//  ClassPathResource classPathResource = new ClassPathResource("resource.properties");
  Resource resource = new ClassPathResource("resource.properties");
  InputStream is = resource.getInputStream();
  InputStreamReader isr = new InputStreamReader(is);
  BufferedReader br = new BufferedReader(isr);
  String data = null;
  while((data = br.readLine()) != null) {
   System.out.println(data);
  }
  
  br.close();
  isr.close();
  is.close();
 }

package com.tsinkai.ettp;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class EttpCustomApplicationTests {

 @Autowired
 ResourceLoader resourceLoader;
 
 
 @Test
 public void testReaderFile() throws IOException {
  Resource resource = resourceLoader.getResource("classpath:resource.properties");
  InputStream is = resource.getInputStream();
  InputStreamReader isr = new InputStreamReader(is);
  BufferedReader br = new BufferedReader(isr);
  String data = null;
  while((data = br.readLine()) != null) {
   System.out.println(data);
  }
  
  br.close();
  isr.close();
  is.close();
 }

}