模型类(贫血模型,充血模型)

1.贫血模型

package cn.com.lrs.model;import cn.com.lrs.service.UserManager;public class User {private int id;private String username;private String password;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public boolean exists() throws Exception {return new UserManager().exists(this);}}

???