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 · 132 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。

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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