重写 ToString方法

打印对象时能看到里面的属性值
tristan.User@b1c5fa[name=aa,age=bb,phone=cc]

package tristan;

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

public class TestToStringBuilder {
public static void main(String[] args) {
	User u = new User();
	u.name="aa";
	u.age="bb";
	u.phone="cc";
	
	System.out.println(u);
}
}

class User{
	public String name;
	public String age;
	public String phone;
	
	public String toString(){
		return ToStringBuilder.reflectionToString(this);
	}
}