org.apache.commons.lang3.builder.ToStringBuilder的应用

小鱼儿 2021-05-12 11:50 380阅读 0赞

java开发中你可能需展示类的属性值，把对象记录为日志，调试输出等操作，ToStringBuilder提供简便类转字符串写法。

**1、对象默认的toString()：**

public class MyBean {
    	private Integer id;
    	private String name;
    	
    	public MyBean(Integer id, String name) {
    		super();
    		this.id = id;
    		this.name = name;
    	}
    	//get set方法
    	
    	public static void main(String...strings) {
    		MyBean myBean = new MyBean(1,"test");
    		System.out.println(myBean.toString());
    	}
    }

输出：com.abc.Test.entity.MyBean@15db9742

重写toString方法：

public class MyBean {
    	private Integer id;
    	private String name;
    	
    	public MyBean(Integer id, String name) {
    		super();
    		this.id = id;
    		this.name = name;
    	}
    	//get set方法
        @Override
    	public String toString() {
    		return "MyBean [id=" + id + ", name=" + name + "]";
    	}
    	
    	public static void main(String...strings) {
    		MyBean myBean = new MyBean(1,"test");
    		System.out.println(myBean.toString());
    	}
    }

输出：MyBean \[id=1, name=test\]

**2、使用ToStringBuilder：**

public class MyBean {
    	private Integer id;
    	private String name;
    	
    	public MyBean(Integer id, String name) {
    		super();
    		this.id = id;
    		this.name = name;
    	}
    	//get set方法
        @Override
    	public String toString() {
    		 return ToStringBuilder.reflectionToString(this);
    	}
    	
    	public static void main(String...strings) {
    		MyBean myBean = new MyBean(1,"test");
    		System.out.println(myBean.toString());
    	}
    }

输出：com.iqiyi.toutiao.Test.entity.MyBean@65ab7765\[id=1,name=test\]

此外，还可以指定输出风格：

![20200928203436639.png][]

json格式：return ToStringBuilder.reflectionToString(this,ToStringStyle.JSON\_STYLE);

[20200928203436639.png]: /images/20210511/1b415c41389a44f68f27b988ec374561.png