Java toString方法重写工具之ToStringBuilder案例详解

import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;
 
public class Message {
 
	private String from;
 
	private String to;
 
	private String body;
 
	public String getFrom() {
		return from;
	}
 
	public void setFrom(String from) {
		this.from = from;
	}
 
	public String getTo() {
		return to;
	}
 
	public void setTo(String to) {
		this.to = to;
	}
 
	public String getBody() {
		return body;
	}
 
	public void setBody(String body) {
		this.body = body;
	}
 
	@Override
	public String toString() {
		return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);
	}
	
	public static void main(String[] args) {
		Message msg = new Message();
		msg.setFrom("vince");
		msg.setTo("mike");
		msg.setBody("hello");
		System.out.println(msg.toString());
	}
}

    /**
     * <p>Append to the <code>toString</code> the start of data indicator.</p>
     * 拼装结果的
     * @param buffer  the <code>StringBuffer</code> to populate
     * @param object  the <code>Object</code> to build a <code>toString</code> for
     */
    public void appendStart(final StringBuffer buffer, final Object object) {
        if (object != null) {
            appendClassName(buffer, object);
            appendIdentityHashCode(buffer, object);
            appendContentStart(buffer);
            if (fieldSeparatorAtStart) {
                appendFieldSeparator(buffer);
            }
        }
    }
 
    /**
     * <p>Append the {@link System#identityHashCode(java.lang.Object)}.</p>
     * 拼装对象hashcode
     * @param buffer  the <code>StringBuffer</code> to populate
     * @param object  the <code>Object</code> whose id to output
     */
    protected void appendIdentityHashCode(final StringBuffer buffer, final Object object) {
        if (this.isUseIdentityHashCode() && object!=null) {
            register(object);
            buffer.append('@');
            buffer.append(Integer.toHexString(System.identityHashCode(object)));
        }
    }