最近业务上需要java调用执行shell脚本进行一些业务处理，写了个demo，记录下。

主要代码

    @RequestMapping("/copy/database")@ResponseBodypublic String copyDatabase(HttpServletRequest request,String dbCode,String targetPath){JSONObject result = new JSONObject();String osname = System.getProperty("os.name");if ((osname != null) && (osname.toLowerCase().startsWith("win"))){LOG.info("当前操作系统是:"+osname);result.put("code", "0");result.put("msg", "当前服务器操作系统不是linux");return result.toJSONString();}LOG.info("接收到参数:dbCode=" + dbCode + " targetDbNfsPath=" + targetPath);if(StringUtil.isBlank(dbCode) || StringUtil.isBlank(targetPath)){result.put("code", "0");result.put("msg", "dbCode/targetPath不能为空");return result.toJSONString();}String dir = DbDirConstant.findDir(dbCode);if(StringUtil.isBlank(dir)){result.put("code", "0");result.put("msg", "根据dbCode找不到对应的数据库目录");return result.toJSONString();}//脚本路径String shellPath = request.getServletContext().getRealPath("/")+"WEB-INF/classes";String cmd = shellPath + "/copyDB.sh "+ dir + " " + targetPath;ProcessBuilder builder = new ProcessBuilder("/bin/sh","-c",cmd);builder.directory(new File(shellPath));int runningStatus = 0;String s = null;StringBuffer sb = new StringBuffer();try {Process p = builder.start();BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));while ((s = stdInput.readLine()) != null) {LOG.info("shell log info ...." + s);sb.append(s);}while ((s = stdError.readLine()) != null) {LOG.error("shell log error...." + s);sb.append(s);}try {runningStatus = p.waitFor();} catch (InterruptedException e) {runningStatus = 1;LOG.error("等待shell脚本执行状态时，报错...",e);sb.append(e.getMessage());}closeStream(stdInput);closeStream(stdError);} catch (Exception e) {LOG.error("执行shell脚本出错...",e);sb.append(e.getMessage());runningStatus =1;}LOG.info("runningStatus = " + runningStatus);if(runningStatus == 0){//成功result.put("code", "1");result.put("msg", "成功");return result.toJSONString();}else{result.put("code", "0");result.put("msg", "调用shell脚本复制数据库时失败..." + sb.toString());return result.toJSONString();}}private void closeStream(BufferedReader reader){try {if(reader != null){reader.close();}} catch (Exception e) {reader = null;}}

其中shell

#!/bin/bashecho 'copy db start....'dbBack=/databaseBack
nfsDir=/targetDbNfs
state=0cd /if [ ! -d "$nfsDir" ];thenmkdir -p $nfsDir
fi## mount target db
echo 'ready mount target db...'
mount -t nfs $2 $nfsDirif [ $? -eq 0 ]thenecho 'mount target db success...'elseecho 'mount target db fail...'exit 1
fiecho 'ready copy....'
## cp will tip y/n, so use \cp 
\cp -rf $dbBack/$1/* $nfsDir/if [ $? -eq 0 ]thenecho 'copy success...'elseecho 'copy fail...'$state=1
fiumount $nfsDirexit $state

注意事项：
1.shell脚本必须有执行权限，比如部署后chmod -R 777 /webapps

2.shell文件，必须是UNIX格式，ANSI编码格式，否则容易出问题（可以用notepad++,编辑->文档格式转换，格式->转为ANSI格式