实现日志文件检索和日志文件下载接口

src/main/java/com/genersoft/iot/vmp/service/ILogService.java

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+package com.genersoft.iot.vmp.service;
+
+import com.genersoft.iot.vmp.service.bean.LogFileInfo;
+
+import java.io.File;
+import java.util.List;
+
+public interface ILogService {
+    List<LogFileInfo> queryList(String query, String startTime, String endTime);
+
+    File getFileByName(String fileName);
+}

src/main/java/com/genersoft/iot/vmp/service/bean/LogFileInfo.java

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+package com.genersoft.iot.vmp.service.bean;
+
+import lombok.Data;
+
+@Data
+public class LogFileInfo {
+
+    private String fileName;
+    private String startTime;
+    private String endTime;
+
+    public static LogFileInfo getInstance(String fileName, String startTime, String endTime) {
+        LogFileInfo logFileInfo = new LogFileInfo();
+        logFileInfo.setFileName(fileName);
+        logFileInfo.setStartTime(startTime);
+        logFileInfo.setEndTime(endTime);
+        return logFileInfo;
+    }
+
+}

src/main/java/com/genersoft/iot/vmp/service/impl/LogServiceImpl.java

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+package com.genersoft.iot.vmp.service.impl;
+
+import ch.qos.logback.classic.Logger;
+import ch.qos.logback.core.rolling.RollingFileAppender;
+import com.genersoft.iot.vmp.conf.exception.ControllerException;
+import com.genersoft.iot.vmp.service.ILogService;
+import com.genersoft.iot.vmp.service.bean.LogFileInfo;
+import com.genersoft.iot.vmp.utils.DateUtil;
+import com.genersoft.iot.vmp.vmanager.bean.ErrorCode;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.io.input.ReversedLinesFileReader;
+import org.apache.commons.lang3.ObjectUtils;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Service;
+
+import java.io.*;
+import java.nio.charset.Charset;
+import java.nio.file.Files;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.FileTime;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+@Service
+@Slf4j
+public class LogServiceImpl implements ILogService {
+
+    @Override
+    public List<LogFileInfo> queryList(String query, String startTime, String endTime) {
+        File logFile = getLogDir();
+        if (logFile == null && !logFile.exists()) {
+            throw new ControllerException(ErrorCode.ERROR100.getCode(), "获取日志文件目录失败");
+        }
+        File[] files = logFile.listFiles();
+        List<LogFileInfo> result = new ArrayList<>();
+        if (files == null || files.length == 0) {
+            return result;
+        }
+        for (File file : files) {
+            LogFileInfo logFileInfo = new LogFileInfo();
+            logFileInfo.setFileName(file.getName());
+            if (query != null && !file.getName().contains(query)) {
+                continue;
+            }
+            // 读取文件创建时间作为开始时间，修改时间为结束时间
+
+            Long startTimestamp = null;
+            if (startTime != null) {
+                startTimestamp = DateUtil.yyyy_MM_dd_HH_mm_ssToTimestamp(startTime);
+            }
+            Long endTimestamp = null;
+            if (startTime != null) {
+                endTimestamp = DateUtil.yyyy_MM_dd_HH_mm_ssToTimestamp(endTime);
+            }
+            try {
+                String[] fileAttributes = getFileAttributes(file);
+                if (fileAttributes == null) {
+                    continue;
+                }
+                logFileInfo.setStartTime(fileAttributes[0]);
+                logFileInfo.setEndTime(fileAttributes[1]);
+                if (startTimestamp != null && startTimestamp > DateUtil.yyyy_MM_dd_HH_mm_ssToTimestampMs(fileAttributes[0])) {
+                    continue;
+                }
+                if (endTimestamp != null && endTimestamp < DateUtil.yyyy_MM_dd_HH_mm_ssToTimestampMs(fileAttributes[1])) {
+                    continue;
+                }
+            } catch (IOException e) {
+                log.error("[读取日志文件列表] 获取创建时间和修改时间失败", e);
+                continue;
+            }
+            result.add(logFileInfo);
+
+        }
+        return result;
+    }
+
+    private File getLogDir() {
+        Logger logger = (Logger) LoggerFactory.getLogger("com.genersoft.iot.vmp");
+        RollingFileAppender rollingFileAppender = (RollingFileAppender) logger.getAppender("RollingFile");
+        File rollingFile = new File(rollingFileAppender.getFile());
+        return rollingFile.getParentFile();
+    }
+
+    String[] getFileAttributes(File file) throws IOException {
+        BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
+        String startLine = bufferedReader.readLine();
+        if (startLine== null) {
+           return null;
+        }
+        String startTime = startLine.substring(0, 19);
+
+
+        String lastLine = "";
+        try (ReversedLinesFileReader reversedLinesReader = new ReversedLinesFileReader(file, Charset.defaultCharset())) {
+            lastLine = reversedLinesReader.readLine();
+        } catch (Exception e) {
+            log.error("file read error, msg:{}", e.getMessage(), e);
+        }
+        String endTime = lastLine.substring(0, 19);
+        return new String[]{startTime, endTime};
+    }
+
+    @Override
+    public File getFileByName(String fileName) {
+        File logDir = getLogDir();
+
+        return new File(logDir, fileName);
+    }
+}