java(包括springboot)读取resources下文件方式实现
作者:抄手砚
这篇文章主要介绍了java(包括springboot)读取resources下文件方式实现,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧
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("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.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(); } }
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