sonar阻断级别错误（block）简单汇总

1、代码里面包含PASSWORD、PWD

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

 

2、父子类或者同一个类有同名的变量名（类方法、类变量、实例方法或者实例变量）

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

比如父类定义了一个Logger logger=...的logger变量，

子类又再次定义logger变量

 

父类里面已存在

 

或者

实体类的get/set方法多次定义，仅仅大小写不一样 

 同一个类里面

 

3、涉及到资源关闭这种，Use try-with-resources or close this "BufferedOutputStream" in a "finally" clause.

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

 

 

这种比较麻烦，传统的做法，即在finally里面进行if（stream！=null）(try{}catch(){})关闭仍然无法通过

这种单独开一篇博客寻找解决方法，见下一篇博客

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