sonar阻斷級別錯誤（block）簡單彙總

一、代碼裏面包含PASSWORD、PWD

'PWD' detected in this expression, review this potentially hardcoded credential.

 

二、父子類或者同一個類有同名的變量名（類方法、類變量、實例方法或者實例變量）

Rename method "ENCRYPTMethod" to prevent any misunderstanding/clash with method "encryptMethod" defined on line 35.

 

public static String encryptMethod(String HexString, String keyStr) {
     ....  
}

 public static String ENCRYPTMethod(String HexString, String keyStr, String keyENCODED, String HexStringENCODED, String CipherInstanceType) throws Exception {
    .....
}

 

或者

好比父類定義了一個Logger logger=...的logger變量，

子類又再次定義logger變量

 

父類裏面已存在

 

或者

實體類的get/set方法屢次定義，僅僅大小寫不同 

 同一個類裏面

 

三、涉及到資源關閉這種，Use try-with-resources or close this "BufferedOutputStream" in a "finally" clause.

Use try-with-resources or close this "BufferedOutputStream" in a "finally" clause.

 

 

這種比較麻煩，傳統的作法，即在finally裏面進行if（stream！=null）(try{}catch(){})關閉仍然沒法經過

這種單獨開一篇博客尋找解決方法，見下一篇博客

Resources should be closed (squid:S2095)
 Bug  Blocker
Connections, streams, files, and other classes that implement the Closeable interface or its super-interface, AutoCloseable, needs to be closed after use. Further, that close call must be made in a finally block otherwise an exception could keep the call from being made. Preferably, when class implements AutoCloseable, resource should be created using "try-with-resources" pattern and will be closed automatically.

Failure to properly close resources will result in a resource leak which could bring first the application and then perhaps the box it's on to their knees.

Noncompliant Code Example
private void readTheFile() throws IOException {
  Path path = Paths.get(this.fileName);
  BufferedReader reader = Files.newBufferedReader(path, this.charset);
  // ...
  reader.close();  // Noncompliant
  // ...
  Files.lines("input.txt").forEach(System.out::println); // Noncompliant: The stream needs to be closed
}

private void doSomething() {
  OutputStream stream = null;
  try {
    for (String property : propertyList) {
      stream = new FileOutputStream("myfile.txt");  // Noncompliant
      // ...
    }
  } catch (Exception e) {
    // ...
  } finally {
    stream.close();  // Multiple streams were opened. Only the last is closed.
  }
}
Compliant Solution
private void readTheFile(String fileName) throws IOException {
    Path path = Paths.get(fileName);
    try (BufferedReader reader = Files.newBufferedReader(path, StandardCharsets.UTF_8)) {
      reader.readLine();
      // ...
    }
    // ..
    try (Stream<String> input = Files.lines("input.txt"))  {
      input.forEach(System.out::println);
    }
}

private void doSomething() {
  OutputStream stream = null;
  try {
    stream = new FileOutputStream("myfile.txt");
    for (String property : propertyList) {
      // ...
    }
  } catch (Exception e) {
    // ...
  } finally {
    stream.close();
  }
}
Exceptions
Instances of the following classes are ignored by this rule because close has no effect:

•java.io.ByteArrayOutputStream 
•java.io.ByteArrayInputStream 
•java.io.CharArrayReader 
•java.io.CharArrayWriter 
•java.io.StringReader 
•java.io.StringWriter 
Java 7 introduced the try-with-resources statement, which implicitly closes Closeables. All resources opened in a try-with-resources statement are ignored by this rule. 

try (BufferedReader br = new BufferedReader(new FileReader(fileName))) {
  //...
}
catch ( ... ) {
  //...
}
See
•MITRE, CWE-459 - Incomplete Cleanup 
•CERT, FIO04-J. - Release resources when they are no longer needed 
•CERT, FIO42-C. - Close files when they are no longer needed 
•Try With Resources