java(包括springboot)读取resources下文件方式实现

java(包括springboot)读取resources下文件方式实现

本文主要介绍了java(包括springboot)读取resources下文件方式实现，分享给大家，具体如下：

1、使用项目内路径读取，该路径只在开发工具中显示，类似：src/main/resources/resource.properties。只能在开发工具中使用，部署之后无法读取。（不通用）

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();

}

2、使用org.springframework.util.ResourceUtils，读取。在linux环境中无法读取。（不通用）

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();

}

3、使用org.springframework.core.io.ClassPathResource，各种环境都能读取。（通用）

Resource resource = new ClassPathResource("http://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();

}

4、结合spring注解，使用org.springframework.core.io.ResourceLoader;类的注解。（通用）

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.couwnUfEre.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();

}

}

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