JarFileUtils.java
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package com.genersoft.iot.vmp.utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.util.ClassUtils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
/**
* 一个优秀的颓废程序猿
*/
@Component
public class JarFileUtils {
private static Logger log = LoggerFactory.getLogger(JarFileUtils.class);
private static Map<String, String> map = new HashMap<>();
public Map<String, String> readJarFile() {
JarFile jarFile = null;
BufferedReader br = null;
try {
// 获取jar的运行路径，因linux下jar的路径为”file:/app/.../test.jar!/BOOT-INF/class!/“这种格式，所以需要去掉”file:“和”!/BOOT-INF/class!/“
String jarFilePath = ClassUtils.getDefaultClassLoader().getResource("").getPath().replace("!/BOOT-INF/classes!/", "");
if (jarFilePath.startsWith("file")) {
jarFilePath = jarFilePath.substring(5);
}
log.debug("jarFilePath:" + jarFilePath);
// 通过JarFile的getJarEntry方法读取META-INF/MANIFEST.MF
jarFile = new JarFile(jarFilePath);
JarEntry entry = jarFile.getJarEntry("META-INF/MANIFEST.MF");
log.info("读取的内容:" + entry.toString());
// 如果读取到MANIFEST.MF文件内容，则转换为string
if (entry != null) {
InputStream in = jarFile.getInputStream(entry);
StringBuilder sb = new StringBuilder();
br = new BufferedReader(new InputStreamReader(in));
String line = "";
while ((line = br.readLine()) != null) {
if (line != null && line.contains(":")) {
int index = line.indexOf(":");
map.put(line.substring(0, index).trim(), line.substring(index + 1, line.length()).trim());
}
}
return map;
}
} catch (IOException e) {
log.debug("读取MANIFEST.MF文件异常:" + e.getMessage());
} finally {
try {
if (null != br) {
br.close();
}
if (null != jarFile) {
jarFile.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return map;
}
}