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 ]