Testing of override of toString()

最新推荐文章于 2024-03-14 15:03:20 发布

最新推荐文章于 2024-03-14 15:03:20 发布 · 141 阅读

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本文介绍了如何在 Java 中为 POJO 类覆盖 toString 方法来方便地打印对象属性。通过使用 Apache Commons Lang 库中的 ToStringBuilder，可以简洁地实现这一功能，并展示了两种不同的实现方式及其输出效果。

At fisrt,thanks for the tips of Xia,I just run the situation he described.

When we want to print the properties of POJO, we can override the function toString() for conveninence , here is my testing code:

Created a object Student:

package mysrc;
import java.io.Serializable;

import org.apache.commons.lang.builder.ToStringBuilder;

public class Student implements Serializable{

	int id;
	String name;
	//construct
	Student (){		
	}
	
	Student(int id,String name){
		this.id = id;
		this.name = name;
	}
	
	//override
	public  String toString(){		
		return ToStringBuilder.reflectionToString(this);
	}
	
	//the different way to implement this function
	public String toStr(){
		return new ToStringBuilder(this).append("id",id).append("name",name).toString();
	}

}

Then test these two methods:

package mysrc;

public class ToStringTest {	
	public static void main(String args[]){		
		Student stu = new Student(10086,"tanglei");		
		System.out.println(stu.toString());
		System.out.println(stu.toStr());
	}
}

Then the result is :

mysrc.Student@a62fc3[id=10086,name=tanglei]
mysrc.Student@a62fc3[id=10086,name=tanglei]

Ok,that's all