package com.pms.util;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* 执行 linux命令
*
* @author mars
*
*/
public class ExecuteLinux {
// log4j实例名
private static final Log log = LogFactory.getLog(ExecuteLinux.class
.getCanonicalName());
/**
* 执行linux命令，并输出结果
*
* @param cmd
* @throws RuntimeException
* @throws IOException
*/
public static void execute(String[] cmd) throws Exception {
InputStream errorStream = null;
InputStream inputStream = null ;
Process ps = null;
try {
// String[] cmd = new String[] { "/bin/sh", "-c", "ls" };
ps = Runtime.getRuntime().exec(cmd);
log.debug("开始执行本地线程");
errorStream = ps.getErrorStream(); // 正确结果的流
inputStream = ps.getInputStream(); // 错误结果的流
printError(errorStream);
printInfo(inputStream);
} catch (Exception e) {
log.error("execute linux command error...", e);
throw new Exception("execute linux command error...");
}finally{
if(errorStream != null){
errorStream.close();
}
if(inputStream != null){
inputStream.close();
}
ps.destroy();
}
}
/**
* 打印 正确信息
* @param errorStream
* @throws IOException
*/
private static void printInfo(InputStream inputStream) throws IOException{
StringBuffer sb = new StringBuffer();
int line=0;
while ((line = inputStream.read(new byte[1024])) != -1) {
sb.append((char)line).append("\n");
}
String result = sb.toString();
System.out.println("#####正确信息######:"+result);
log.debug("#####正确信息LOG######:"+result);
}
/**
* 打印错误信息
* @param errorStream
* @throws IOException
*/
private static void printError(InputStream errorStream) throws IOException{
StringBuffer sb = new StringBuffer();
int line=0;
while ((line = errorStream.read(new byte[1024])) != -1) {
sb.append((char)line).append("\n");
}
String result = sb.toString();
System.out.println("#####错误信息######:"+result);
log.debug("#####错误信息LOG######:"+result);
}
/**
* 获得 wgrib2 切割的linux命令,将grib2切割为二进制 bin 文件
* @param pathName 文件路径名
* @param fileName 文件名
* @param savePath 要保存到的路径名
* @param lists 条件集合（必不为空，因为从数据库获得，而存入数据库时，前台有校验不为空）
* @return
*/
public static String[] getLinuxCommand(String pathName, String fileName, String savePath, List<String> lists){
//"/bin/sh", "-c",
String[] cmd = new String[3];
cmd[0] = "/bin/sh";
cmd[1] = "-c";
StringBuffer condition_bf = new StringBuffer();
for (String str : lists) {
condition_bf.append(str+" mb|");
}
// 将最后一个 ‘|‘ 符号截掉
String condition_str = condition_bf.toString().substring(0, condition_bf.toString().length()-1);
//wgrib2 -s Z_NAFP_C_BABJ_20120508000000_P_CNPC-T639-GMFS-HNEHE-00300.grib2 | grep -E "(\bHGT:20\b)|(\bHGT:30\b)" | wgrib2 -i Z_NAFP_C_BABJ_20120508000000_P_CNPC-T639-GMFS-HNEHE-00300.grib2 -no_header -bin data5.bin
StringBuffer bf = new StringBuffer();
bf.append("wgrib2 -s ");
bf.append(pathName+"/"+fileName);
bf.append(" | grep -E ");
bf.append("\""+condition_str+"\"");
bf.append(" | wgrib2 -i ");
bf.append(pathName+"/"+fileName);
bf.append(" -no_header -bin ");
String newName = fileName.substring(0, fileName.indexOf(".")); // 去掉 .grib2 的文件名
bf.append(savePath+"/"+newName+".bin");
cmd[2] = bf.toString();
return cmd;
}
public static void main(String[] args) {
// String str = "new.grib2";
// System.out.println(str.substring(0, str.indexOf(".")));
//
// String pathName = "/home/ftp/cwfs";
// String fileName = "new_003.grib2";
// String savePath ="/home/ftp/cwfs";
//
// List<String> lists = new ArrayList<String>();
// lists.add("HET:20");
// String[] command = getLinuxCommand(pathName, fileName, savePath, lists);
//
// System.out.println(command[2]);
// File file = new File("E:temp");
// System.out.println(file.getParent());
// File[] listFiles = file.listFiles();
// if(listFiles != null && listFiles.length > 0){
// for (File f : listFiles) {
// f.delete();
// }
// }
// File[] list = file.listFiles();
// for (File s : list) {
// System.out.println(s.getPath());
// }
}
}