commons.apache

1、ToStringBuilder

              //对象及其属性一行显示
            System.out.println(ToStringBuilder.reflectionToString(u));
            System.out.println(ToStringBuilder.reflectionToString(u, ToStringStyle.DEFAULT_STYLE));
            //属性换行显示
            System.out.println(ToStringBuilder.reflectionToString(u, ToStringStyle.MULTI_LINE_STYLE));
            //不显示属性名，只显示属性值，在同一行显示
            System.out.println(ToStringBuilder.reflectionToString(u, ToStringStyle.NO_FIELD_NAMES_STYLE));
            //对象名称简写
            System.out.println(ToStringBuilder.reflectionToString(u, ToStringStyle.SHORT_PREFIX_STYLE));
            //只显示属性
            System.out.println(ToStringBuilder.reflectionToString(u, ToStringStyle.SIMPLE_STYLE));

结果显示： 

test.User@141d683[name=zhengtian,age=25] 
test.User@141d683[name=zhengtian,age=25] 
test.User@141d683[ 
  name=zhengtian 
  age=25 
] 
test.User@141d683[zhengtian,25] 
User[name=zhengtian,age=25] 
zhengtian,25