基于Spring实现搜索目录下指定名称文件
作者:爱码少年 00fly.online
一、简单需求
需要在指定目录下搜索指定名称文件列表
一般思路是通过递归遍历文件,然后通过过滤的方法去实现,
spring的PathMatchingResourcePatternResolver
给了我们另外一种简单实现。
二、源码实现
import java.io.IOException; import java.util.Arrays; import java.util.stream.Stream; import org.junit.jupiter.api.Test; import org.springframework.core.io.Resource; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import lombok.extern.slf4j.Slf4j; @Slf4j public class FileListBySpring { PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(); String userProfile = "file:" + System.getenv().get("USERPROFILE"); /** * 遍历文件 * * @throws IOException */ @Test public void testList() throws IOException { // 外部文件 Resource[] jpgs = resolver.getResources(userProfile + "/Pictures/**/*.jpg"); Arrays.stream(jpgs).forEach(System.out::println); // 外部文件 Resource[] pngs = resolver.getResources(userProfile + "/Pictures/**/*.png"); Arrays.stream(pngs).forEach(System.out::println); // 工程或jar内文件 Resource[] xmls = resolver.getResources("classpath*:**/*.xml"); Arrays.stream(xmls).forEach(System.out::println); // 合并 log.info("################################################## 合并后 ##################################################"); Stream.of(jpgs, pngs, xmls).flatMap(Arrays::stream).forEach(System.out::println); } /** * 遍历文件,支持指定文件名搜索 * * @throws IOException */ @Test public void testList2() throws IOException { Resource[] pngs = resolver.getResources(userProfile + "/Pictures/**/001.png"); Arrays.stream(pngs).forEach(System.out::println); Resource[] pngs2 = resolver.getResources(userProfile + "/Pictures/**/00*.PNG"); Arrays.stream(pngs2).forEach(System.out::println); Resource[] xmls = resolver.getResources("file:C:/Gitee/00fly/effict-side/**/pom.xml"); Arrays.stream(xmls).forEach(System.out::println); } }
三、运行结果
testList2
file [C:\Users\Administrator\Pictures\001.png]
file [C:\Users\Administrator\Pictures\eclipse\001.png]
file [C:\Users\Administrator\Pictures\00006.PNG]
file [C:\Users\Administrator\Pictures\00007.PNG]
file [C:\Users\Administrator\Pictures\00011.PNG]
file [C:\Users\Administrator\Pictures\0002.PNG]
file [C:\Users\Administrator\Pictures\0003.PNG]
file [C:\Users\Administrator\Pictures\0004.PNG]
file [C:\Users\Administrator\Pictures\0005.PNG]
file [C:\Users\Administrator\Pictures\0008.PNG]
file [C:\Users\Administrator\Pictures\0010.PNG]
file [C:\Users\Administrator\Pictures\009.PNG]
file [C:\Users\Administrator\Pictures\eclipse\000.PNG]
file [C:\Users\Administrator\Pictures\eclipse\006.PNG]
file [C:\Gitee\00fly\effict-side\apidoc-image\pom.xml]
file [C:\Gitee\00fly\effict-side\auto-to-swagger\jsp-to-swagger\pom.xml]
file [C:\Gitee\00fly\effict-side\class-junit-run\java-demo\pom.xml]
file [C:\Gitee\00fly\effict-side\class-junit-run\java-junit4\pom.xml]
file [C:\Gitee\00fly\effict-side\class-junit-run\run-test-boot\pom.xml]
file [C:\Gitee\00fly\effict-side\class-junit-run\run-test-simple\pom.xml]
file [C:\Gitee\00fly\effict-side\class-junit-run\tcp-boot\pom.xml]
file [C:\Gitee\00fly\effict-side\class-junit-run\tcp-java\pom.xml]
。。。。。。
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