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