项目开发过程中我们我们会遇到访问静态文件的情况,例如word书签模板,excel导入模板,条文法规文件等,在war包的情况下访问是没有问题的,如果使用jar包部署,使用相对路径访问会出现问题,本文就此问题给出解决方案。
resources文件夹下创建静态目录systemfile,放入测试文件test.docx(文件名需要命名为英文)
pom文件resource/build节点设置打包编译忽略systemfile文件夹
<resources>
<resource>
<filtering>true</filtering>
<directory>src/main/resources</directory>
<excludes>
<exclude>systemfile/*</exclude>
</excludes>
</resource>
<resource>
<filtering>false</filtering>
<directory>src/main/resources</directory>
<includes>
<include>systemfile/*</include>
</includes>
</resource>
</resources>
使用ClassPathResource的getInputStream获取jar包中的文件的流暂存到磁盘的临时文件中,直接访问临时文件即可
String testFilePath = ClassPathFileUtil.getFilePath("systemfile/test.docx");
public static String getFilePath(String classFilePath) {
String filePath = "";
try {
String templateFilePath = "tempfiles/classpathfile/";
File tempDir = new File(templateFilePath);
if (!tempDir.exists()) {
tempDir.mkdirs();
}
String[] filePathList = classFilePath.split("/");
String checkFilePath = "tempfiles/classpathfile";
for (String item : filePathList) {
checkFilePath += "/" + item;
}
File tempFile = new File(checkFilePath);
if (tempFile.exists()) {
filePath = checkFilePath;
} else {
//解析
ClassPathResource classPathResource = new ClassPathResource(classFilePath);
InputStream inputStream = classPathResource.getInputStream();
checkFilePath = "tempfiles/classpathfile";
for (int i = 0; i < filePathList.length; i++) {
checkFilePath += "/" + filePathList[i];
if (i==filePathList.length-1) {
//文件
File file = new File(checkFilePath);
FileUtils.copyInputStreamToFile(inputStream, file);
}else{
//目录
tempDir = new File(checkFilePath);
if (!tempDir.exists()) {
tempDir.mkdirs();
}
}
}
inputStream.close();
filePath = checkFilePath;
}
} catch (Exception e) {
e.printStackTrace();
}
return filePath;
}
项目启动时,需要清除静态文件的临时文件,避免文件更新
@Component
@Order(value = 10)
public class StartUpContext implements ApplicationRunner {
@Override
public void run(ApplicationArguments args) throws Exception {
String templateFilePath = "tempfiles/classpathfile/";
File tempDir = new File(templateFilePath);
FileSystemUtils.deleteRecursively(tempDir);
System.out.println("清除classpathfile临时文件成功");
}