Commons Lang Generation of toString( ) Content

最新推荐文章于 2025-06-03 05:15:00 发布

iteye_19538

最新推荐文章于 2025-06-03 05:15:00 发布

阅读量95

点赞数

分类专栏： JAVA 文章标签： Apache

JAVA 专栏收录该内容

16 篇文章

订阅专栏

本文介绍使用Apache Commons Lang库中的ReflectionToStringBuilder简化Java对象toString()方法的实现。通过不同样式配置，可以灵活展示对象属性，便于调试与日志记录。

用Commons Lang ReflectionToStringBuilder or ToStringBuilder and ToStringBuilder创建toString() 方法

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

public void toString( ) {

    ReflectionToStringBuilder.toString( this );

}

public class Person {
	private String name;
	private String addr;
    private List<String> phone=new ArrayList<String>();
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getAddr() {
		return addr;
	}

	public void setAddr(String addr) {
		this.addr = addr;
	}

	public List<String> getPhone() {
		return phone;
	}

	public void setPhone(List<String> phone) {
		this.phone = phone;
	}

	@Override
	public String toString() {
		return ReflectionToStringBuilder.toString(this);
	}

public class ReflectionToStringBuilderTest {
  @Test
  public void testReflectionToStringBuilder(){
	  Person p=new Person();
	  List<String> list=new ArrayList<String>();
	  list.add("136");
	  list.add("151");
	  p.setName("lixueli");
	  p.setAddr("china");
	  p.setPhone(list);
	  System.out.println(p.toString()); 
  }
}

@Override
	public String toString() {
		return ReflectionToStringBuilder.toString(this);
	}

输出为：com.lixueli.model.Person@1a0c10f[name=lixueli,addr=china,phone=[136, 151]]

@Override
	public String toString() {
		return new ToStringBuilder(this, ToStringStyle.MULTI_LINE_STYLE)
        .append("name", name)
        .append("addr", addr)
        .append("phone", phone)
        .toString( );
	}

输出为：com.lixueli.model.Person@c7e553[
name=lixueli
addr=china
phone=[136, 151]
]

ToStringStyle.DEFAULT_STYLE

com.discursive.jccook.lang.builders.

PoliticalCandidate@1cd2e5f[lastName=Jefferson,firstName=Thomas]

ToStringStyle.MULTI_LINE_STYLE

com.discursive.jccook.lang.builders.PoliticalCandidate@1cd2e5f[

  lastName=Jefferson

  firstName=Thomas

]

ToStringStyle.NO_FIELD_NAMES_STYLE

com.discursive.jccook.lang.builders.PoliticalCandidate@1cd2e5f[Jefferson,Thomas]

ToStringStyle.SIMPLE_STYLE

Jefferson,Thomas