java 直接呼叫python指令碼,並傳遞引數
阿新 • • 發佈:2019-01-05
最近陸續用python寫了很多檔案處理指令碼,雖然功能都比較簡單 ,但還是感覺到python對檔案處理的簡潔高效 ,越發覺得java的語法相當的繁瑣~
接到個需求處理ftp資料介面 。所以想把python指令碼也用上。java程式碼定時掃描ftp資料倉庫 ,呼叫python指令碼入庫。
直接採用java執行系統命令的方式
@Async public void readFileByPython(List<String> filePaths) throws FileNotFoundException { URL localSrcUrl = AbstractReadFileLine.class.getResource(""); String localSrcPath = localSrcUrl.getPath(); localSrcPath = localSrcPath.substring(1, localSrcPath.length()); String pythonFile = localSrcPath + "PythonFileHandle.py"; int size = filePaths.size() + 2; String[] args = new String[size]; args[0] = "python"; args[1] = pythonFile; for(int i =0;i<filePaths.size() ;i++){ int index = i+2; args[index] = filePaths.get(i); } try { System.out.println("start"); Process proc = Runtime.getRuntime().exec(args); InputStream is = proc.getErrorStream(); InputStreamReader isr = new InputStreamReader(is); BufferedReader br = new BufferedReader(isr); String line = null; System.out.println("<ERROR>"); while((line = br.readLine())!=null){ System.out.println(line); System.out.println("</ERROR>"); int exitValue = proc.waitFor(); System.out.println("Process exitValue="+exitValue); } System.out.println("end"); } catch (Exception e){ e.printStackTrace(); } }
String[] args = new String[size];
args[0] = "python"; args[1] = pythonFile; args[0]表示要執行的是python 指令碼 ,args[1] 指令碼檔案的全路徑
該方法呼叫 AbstractReadFileLine.class 檔案路徑下的 PythonFileHandle.py 指令碼 ,並傳入String陣列型別的引數(需要處理的檔案全路徑)
PythonFileHandle指令碼接受java傳入的檔案路徑引數(陣列),解析併入庫
PythonFileHandle.py 程式碼
import pymssql,time,sys reload(sys) sys.setdefaultencoding("utf-8") class MSSQL: def __init__(self,host,user,pwd,db): self.host = host self.user = user self.pwd = pwd self.db = db def __GetConnect(self): if not self.db: raise(NameError,"") self.conn = pymssql.connect(host=self.host,user=self.user,password=self.pwd,database=self.db,charset="utf8") cur = self.conn.cursor() if not cur: raise(NameError,"") else: return cur def ExecQuery(self,sql): cur = self.__GetConnect() cur.execute(sql) resList = cur.fetchall() # self.conn.close() return resList def ExecNonQuery(self,sql): cur = self.__GetConnect() cur.execute(sql) self.conn.commit() self.conn.close() def insertToCloseList(data ,ms): sql = "insert into t_isee_closelist_infos (WORK_ORDER_ID,CRM_Cdsc_Id,APPRAISE_TYPE,CRM_Accept_Date,latn_code,theme_row_id,TASK_EXECUTE_ROW_ID,CRM_Accept_REASON,ASSET_INTEG_ID) values ( '" temp ="' , '" sqlStr = temp.join(data) sql = sql + sqlStr + "')" ms.ExecNonQuery(sql) ms = MSSQL(host="172.30.0.186",user="sa",pwd="",db="test") fengefu = '$%$' for i in range(1, len(sys.argv)): read = open(sys.argv[i] ,'r') for line in read: line=line.strip('\n') data = line.split(fengefu) insertToCloseList(data,ms) read.close
sys.argv[0] 儲存的是py檔案自身的路徑,故接受引數從sys.argv[1]開始。