建立一个javaBean用来存放数据信息

1 package chouxianglianxi; 2  3 public class DuanXinBao { 4     private int qian; 5     private int shuliang; 6     public int getQian() { 7         return qian; 8     } 9     public void setQian(int qian) {10         this.qian = qian;11     }12     public int getShuliang() {13         return shuliang;14     }15     public void setShuliang(int shuliang) {16         this.shuliang = shuliang;17     }18     19     20 }

建立一个接口

1 package chouxianglianxi; 2  3 public interface IJieKou { 4     //为金额赋值 5     void booqian(); 6     //为数量赋值 7     void booshuliang(); 8     //返回有数据的类 9     DuanXinBao dduanxin();10 }

建立类继承接口

1 package chouxianglianxi; 2  3 public class ShiXian implements IJieKou { 4     private DuanXinBao duanxinbao; 5  6     public ShiXian(){ 7         //new出来实例 8         duanxinbao = new DuanXinBao(); 9     }10     @Override11     public void booqian() {12         //赋值13         duanxinbao.setQian(100);14     }15 16     @Override17     public void booshuliang() {18         //赋值19         duanxinbao.setShuliang(5000);20     }21 22     @Override23     public DuanXinBao dduanxin() {24         //返回出去25         return duanxinbao;26     }27 28 }

建立一个文件

1 package chouxianglianxi; 2  3 public class MessageDLod { 4     //返回类型为Bean 5     public DuanXinBao getduanxin(IJieKou ijiekou){ 6         // 7         if(ijiekou != null){ 8             //执行赋值的方法 9             ijiekou.booqian();10             ijiekou.booshuliang();11             //赋值完毕把它返回出去12             return ijiekou.dduanxin();13         }14         return null;15     }16 }

客户端文件

1 package chouxianglianxi; 2  3 public class Client { 4     public static void main(String[] args) { 5         //里面有数量和金额的文件 6         IJieKou is = new ShiXian(); 7         //构造者 8         MessageDLod messag = new MessageDLod(); 9         //拿到文件为它赋值10         DuanXinBao duanxinbao = messag.getduanxin(is);11         //读取12         System.out.println(duanxinbao.getQian());13         System.out.println(duanxinbao.getShuliang());14     }15 }