struts2.2.1+hibernate3.6.0+spring3.0.5+proxool-0.9.1实例（6）
service代码：
package com.yj.service;import java.util.List;import javax.annotation.Resource;import org.springframework.stereotype.Component;import com.yj.dao.UserDAO;import com.yj.model.User;@Componentpublic class UserService {private UserDAO userDAO = new UserDAO();;public UserDAO getUserDAO() {return userDAO;}@Resourcepublic void setUserDAO(UserDAO userDAO) {this.userDAO = userDAO;}public void save(User user) {userDAO.save(user);}public boolean exits(String username){List<User> users = userDAO.findByUsername(username);if(users!=null&&users.size()>0){return true;}return false;}}package com.yj.model;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.Table;import org.hibernate.annotations.GenericGenerator;@Entity@Table(name = "User1")public class User{ private String id; private String username; private String password; @Id @GenericGenerator(name = "uuid", strategy = "uuid") @GeneratedValue(generator = "uuid") public String getId() { return id; } public void setId(String 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; }}