셸 명령을 사용하여 파일 사용 권한 (rwx) 부여 java

Question

처음에는 읽기 권한 만있는 xml 파일이 linux에 있습니다. 파일 내용을 업데이트해야합니다. 그래서 Java를 통해 파일 사용 권한 (wx)을 부여하려고합니다. 여기

코드이다

File pomFile = new File(wsPath + "pom.xml"); 

logger.info("Before change: Is Execute allow : " + pomFile.canExecute()); //false 
logger.info("Before change: Is Write allow : " + pomFile.canWrite()); //false 
logger.info("Before change: Is Read allow : " + pomFile.canRead()); //true 

String command = "sudo chmod -R ugo+wx " + wsPath + "pom.xml"; 
Process p = Runtime.getRuntime().exec(command); 

logger.info("After change: Is Execute allow : " + pomFile.canExecute()); //false 
logger.info("After change: Is Write allow : " + pomFile.canWrite()); //false 
logger.info("After change: Is Read allow : " + pomFile.canRead()); //true 

InputStream inputStream = getClass().getResourceAsStream("/output-pom.xml"); 
String packageName=AppConstants.PACKAGE_DEFAULT+"."+client+"."+projectName; 
String pomContent=IOUtils.toString(inputStream); 
pomContent=pomContent.replace("<groupId>PACKAGE_NAME</groupId>","<groupId>"+packageName+"</groupId>"); 
pomContent=pomContent.replace("PROJECT_NAME", projectName); 

FileWriter writer = new FileWriter(pomFile, false); 
writer.write(pomContent); 
writer.close(); 

같은 권한을 설정 한 후에 pomFile.canWrite() 및 pomFile.canExecute()는 false를 나타낸다. 또한 FileWriter가 예외를 던지고 있습니다. 이 문제를 해결할 수있는 방법은 무엇입니까?

java.io.FileNotFoundException: wsPath/pom.xml (Permission denied) 
     at java.io.FileOutputStream.open0(Native Method) ~[na:1.8.0_45] 
     at java.io.FileOutputStream.open(FileOutputStream.java:270) ~[na:1.8.0_45] 
     at java.io.FileOutputStream.<init>(FileOutputStream.java:213) ~[na:1.8.0_45] 
     at java.io.FileWriter.<init>(FileWriter.java:107) ~[na:1.8.0_45] 
     at com.apptium.eportal.servlet.CreateProjectServlet.doPost(CreateProjectServlet.java:179) ~[classes/:na] 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) [servlet-api.jar:na] 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [servlet-api.jar:na] 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) [catalina.jar:8.0.32] 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.32] 
     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-websocket.jar:8.0.32] 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [catalina.jar:8.0.32] 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [catalina.jar:8.0.32] 
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) [catalina.jar:8.0.32] 
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [catalina.jar:8.0.32] 
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) [catalina.jar:8.0.32] 
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) [catalina.jar:8.0.32] 
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [catalina.jar:8.0.32] 
     at ch.qos.logback.access.tomcat.LogbackValve.invoke(LogbackValve.java:189) [logback-access-1.1.2.jar:na] 
     at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:676) [catalina.jar:8.0.32] 
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [catalina.jar:8.0.32] 
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522) [catalina.jar:8.0.32] 
     at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095) [tomcat-coyote.jar:8.0.32] 
     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672) [tomcat-coyote.jar:8.0.32] 
     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) [tomcat-coyote.jar:8.0.32] 
     at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) [tomcat-coyote.jar:8.0.32] 
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_45] 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_45] 
     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.0.32] 
     at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45] 

Answer 1

보십시오

pomFile.setWritable(true); 
pomFile.setExecutable(false); 
pomFile.setReadable(false); 

은 또한 당신이 다음, 당신은 Java7를 사용하는 경우 같은

Runtime.getRuntime().exec("chmod 777 file"); 

을위한 기성품 방법이없는 당신이 자바 IO 클래스 등이 시도 할 수 있습니다 다음 사용 가능

setPosixFilePermissions(Path path, Set perms) 

// Example code 

Set<PosixFilePermission> perms = new HashSet<PosixFilePermission>(); 
//add owners permission 
perms.add(PosixFilePermission.OWNER_READ); 
perms.add(PosixFilePermission.OWNER_WRITE); 
perms.add(PosixFilePermission.OWNER_EXECUTE); 
//add group permissions 
perms.add(PosixFilePermission.GROUP_READ); 
perms.add(PosixFilePermission.GROUP_WRITE); 
perms.add(PosixFilePermission.GROUP_EXECUTE); 
//add others permissions 
perms.add(PosixFilePermission.OTHERS_READ); 
perms.add(PosixFilePermission.OTHERS_WRITE); 
perms.add(PosixFilePermission.OTHERS_EXECUTE); 

Files.setPosixFilePermissions(Paths.get(wsPath + "pom.xml"), perms);