Linux下解壓.7z壓縮包，java呼叫shell命令執行，解壓速度是java程式解壓的幾十倍乃至更多，首先確認主機上已安裝.7z命令。

package com.annet.upload.core.utils;

import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.text.DateFormat;
import
 
 java.text.SimpleDateFormat;
import java.util.Date;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 執行shell解壓命令
 * 
 * @author yanhu
 * @date 2017/12/11
 */
public class ShellUtils {
    // 基本路徑
    private static final String basePath = "/tmp/";
    // 記錄Shell執行狀況的日誌檔案的位置(絕對路徑)
    private static
 
 final String executeShellLogFile = basePath + "executeShell.log";

    private static Logger logger = LoggerFactory.getLogger(ShellUtils.class);

    public static int executeShell(String shellCommand) throws Exception {
        int success = 0;
        StringBuffer stringBuffer = new StringBuffer();
        BufferedReader bufferedReader = null
 
;
        // 格式化日期時間，記錄日誌時使用
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:SS ");
        try {
            stringBuffer.append(dateFormat.format(new Date())).append("準備執行Shell命令 ").append(shellCommand)
                    .append("\r\n");
            Process pid = null;
            String[] cmd = { "/bin/sh", "-c", shellCommand };
            // 執行Shell命令
            pid = Runtime.getRuntime().exec(cmd);
            if (pid != null) {
                stringBuffer.append("程序號：").append(pid.toString()).append("\r\n");
                // bufferedReader用於讀取Shell的輸出內容
                bufferedReader = new BufferedReader(new InputStreamReader(pid.getInputStream()), 1024);
                pid.waitFor();
            } else {
                stringBuffer.append("沒有pid\r\n");
            }
            stringBuffer.append(dateFormat.format(new Date())).append("Shell命令執行完畢\r\n執行結果為：\r\n");
            String line = null;
            // 讀取Shell的輸出內容，並新增到stringBuffer中
            while (bufferedReader != null && (line = bufferedReader.readLine()) != null) {
                stringBuffer.append(line).append("\r\n");
            }
            logger.info("解壓完成");
        } catch (Exception ioe) {
            logger.error("執行Shell命令時發生異常：" + ioe.getMessage());
            stringBuffer.append("執行Shell命令時發生異常：\r\n").append(ioe.getMessage()).append("\r\n");
            throw ioe;
        } finally {
            if (bufferedReader != null) {
                OutputStreamWriter outputStreamWriter = null;
                try {
                    bufferedReader.close();
                    // 將Shell的執行情況輸出到日誌檔案中
                    OutputStream outputStream = new FileOutputStream(executeShellLogFile);
                    outputStreamWriter = new OutputStreamWriter(outputStream, "UTF-8");
                    outputStreamWriter.write(stringBuffer.toString());
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    outputStreamWriter.close();
                }
            }
            success = 1;
        }
        return success;
    }
}

try {
    long start = System.currentTimeMillis();
    logger.info("開始解壓：" + inputPath);
    //拼接shell解壓命令
    shellCode = "7za -p" + password + " x " + inputPath + " -r -o" + unzipPath;
    ShellUtils.executeShell(shellCode);
    logger.info("解壓耗時：" + ((System.currentTimeMillis() - start) / 1000) + "S");
} catch (Exception e) {
    e.printStackTrace();
    return;
}