ReflectionToStringBuilder Sınıfı

Giriş

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import org.apache.commons.lang3.builder.ReflectionToStringBuilder;

Açıklaması şöyle

ReflectionToStringBuilder is a utility class in the Apache Commons Lang library that helps to create a string representation of an object’s state using reflection. It can be useful in debugging, logging, and other scenarios where we need to understand the current state of an object. 

Maven

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<dependency>
  <groupId>org.apache.commons</groupId>
  <artifactId>commons-lang3</artifactId>
  <version>3.12.0</version>
</dependency>

exclude metodu

Açıklaması şöyle

To exclude certain fields from the output string, you can use the exclude method of the ReflectionToStringBuilder class.

Örnek

Şöyle yaparız

String personAsString = new ReflectionToStringBuilder(person)
  .exclude("email")
  .toString();
System.out.println(personAsString);

// Output:
// Person@57a23b66[name=Fake Name,age=30]

Örnek

Şöyle yaparız

// You can also exclude multiple fields by passing them as a 
// comma-separated string or an array

String[] excludeFields = {"age", "email"};
String personAsString = new ReflectionToStringBuilder(person)
  .exclude(excludeFields)
  .toString();
System.out.println(personAsString);

// Output:
// Person@57a23b66[name=Fake Name]

toString metodu

Örnek

Şöyle yaparız

Person person = new Person("Fake Name", 30, "fake.name@example.com");
String personAsString = ReflectionToStringBuilder.toString(person);
System.out.println(personAsString);

// Output:
// Person@57a23b66[name=Fake Name,age=30,email=fake.name@example.com]

Örnek

Şöyle yaparız. Burada her bir Cookie nesnesi String'e çevriliyor ve bu String nesneleri StringJoiner tarafından birleştiriliyor

private String getCookieString(Cookie[] cookies){
  if(cookies == null)
    return "null";
  StringJoiner stringJoiner = new StringJoiner(",","[","]");
  for (Cookie cookie : cookies) {
    stringJoiner.add(ReflectionToStringBuilder.toString(cookie));
  }
  return stringJoiner.toString();
}

Örnek

Şöyle yaparız

// You can also leverage ReflectionToStringBuilder to generate multiline
// string representations of objects.

public class Person {
  private String name;
  private int age;
  private String email;

  // Constructors, getters, setters, and other methods omitted for brevity

  @Override
  public String toString() {
    return ReflectionToStringBuilder.toString(this, ToStringStyle.MULTI_LINE_STYLE);
  }
}
// Output:

Person@1b6d3586[
  name=Fake Name
  age=30
  address=a@b.com
]