我要评论一、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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