commons 自动生成 toString()方法

     import java.io.Serializable;  

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

     public class User implements Serializable {  

         private int id;  

         private String name;  

         public int getId() {  
             return id;  
         }  

         public void setId(int id) {  
             this.id = id;  
         }  

         public String getName() {  
             return name;  
         }  

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

         @Override  
         public String toString() {  

             //两种方式都可以  
             //return ReflectionToStringBuilder.toString(this);  

             return ToStringBuilder.reflectionToString(this);  
         }  

     }