我们建一个简单的表如下:
+-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | id | varchar(32) | | PRI | | | | name | varchar(80) | YES | | NULL | | | sex | char(1) | YES | | NULL | | | age | int(11) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+
manager的接口
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package com.martin.pdo;
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import java.util.List;
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/**
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* @author martin.xus
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*/
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public interface UserManager {
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public User load(String id);
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public List loadByName(String name);
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public void add(User user);
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public void remove(User user);
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}
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User,在这里,我们的user已经不在是简单的getter&setter,我们引用了一个manager的对象
并且通过spring注入给它,供它使用,这样我们需要操作用户时,就如下一样
添加新用户
1User user = (User) context.getBean("user");
2User _u1 = new User();
3//
4user.getManager().add(_u1);
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读取用户1User _u2 = (User) user.getManager().loadByName("martin xus").get(0);
让User带上manager的功能,这样,我们便不再需要主动的去声明manager。
相对而言,如果我们只是在domain object种getter&setter,就需要如下。
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UserManager userManager = (userManager ) context.getBean("userManager ");
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userManager.saveUser(_u1);
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整代码如下:
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package com.martin.pdo;
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import java.io.Serializable;
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/**
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* @author martin.xus
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* @hibernate.class table="t_user"
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* @spring.bean name="user"
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* @spring.property name="manager" ref="userManager"
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*/
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public class User implements Serializable {
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/**
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* @hibernate.id generator-class="uuid.hex"
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* length="32"
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* column="user_id"
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*/
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private String id;
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/**
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* @hibernate.property column="user_name"
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* length="80"
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*/
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private String name;
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/**
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* @hibernate.property
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*/
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private char sex;
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/**
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* @hibernate.property
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*/
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private int age;
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private UserManager manager = null;
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/**
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* @return Returns the manager.
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*/
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public UserManager getManager() {
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return manager;
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}
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/**
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* @param manager The manager to set.
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*/
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public void setManager(UserManager manager) {
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this.manager = manager;
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}
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/**
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* @return Returns the age.
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*/
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public int getAge() {
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return age;
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}
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/**
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* @param age The age to set.
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*/
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public void setAge(int age) {
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this.age = age;
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}
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/**
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* @return Returns the id.
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*/
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public String getId() {
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return id;
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}
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/**
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* @param id The id to set.
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*/
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public void setId(String id) {
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this.id = id;
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}
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/**
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* @return Returns the name.
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*/
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public String getName() {
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return name;
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}
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/**
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* @param name The name to set.
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*/
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public void setName(String name) {
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this.name = name;
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}
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/**
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* @return Returns the sex.
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*/
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public char getSex() {
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return sex;
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}
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/**
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* @param sex The sex to set.
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*/
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public void setSex(char sex) {
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this.sex = sex;
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}
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}
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UserManager
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package com.martin.pdo;
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import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
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import java.util.List;
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/**
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* @spring.bean name="userManager"
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&nb
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