看了Robbin前两天发的那帖，Warp framework - 一个相当有前途的Java轻量级Web开发框架(http://www.javaeye.com/topic/168780)，让人眼前一亮，特别是基于annotation的warp-dynamic-finder部分给人印象非常深刻，利用它，80%情况下Dao的实现不用去写了，只要定义个interface，加几个annotation轻松搞定，自己就着手实现了一个，基于spring的HibernateDaoSupport，其用法也很简单，如下：
Java代码
public interface StudentDao {
@Save
Long save(Student student);
@Delete
void delete(Student student);
@Get
Student get(Long id);
@Query("from Student as s where s.name = ? and s.age = ?")
Student getByNameAndAge(String name, Integer age);//根据参数出现的次序绑定
@Query("from Student as s where s.age > :age")
List getStudentsAgeMoreThan(
@Parameter(name = "age") Integer age);//name绑定
@Query("from Student as s where s.name like ?")
Student getStudentNameLike(
@Like(matchMode = MatchMode.START) String name);//支持like
@Query(value = "delete Student where name = ?", executeUpdate = true)
int deleteStudentByName(String name);//批量更新
@Query("from Student as s order by s.id desc")
@Conditions({
@Condition("s.name = ?"), //动态条件添加，如果第一个参数不为null，该条件会被插入query string
@Condition("s.age = ?")
})
Student query(String name, Integer age);
}
public interface StudentDao {
@Save
Long save(Student student);
@Delete
void delete(Student student);
@Get
Student get(Long id);
@Query("from Student as s where s.name = ? and s.age = ?")
Student getByNameAndAge(String name, Integer age);//根据参数出现的次序绑定
@Query("from Student as s where s.age > :age")
List getStudentsAgeMoreThan(
@Parameter(name = "age") Integer age);//name绑定
@Query("from Student as s where s.name like ?")
Student getStudentNameLike(
@Like(matchMode = MatchMode.START) String name);//支持like
@Query(value = "delete Student where name = ?", executeUpdate = true)
int deleteStudentByName(String name);//批量更新
@Query("from Student as s order by s.id desc")
@Conditions({
@Condition("s.name = ?"), //动态条件添加，如果第一个参数不为null，该条件会被插入query string
@Condition("s.age = ?")
})
Student query(String name, Integer age);
}
这样一个Dao就定义OK了，非常容易，有两种使用方式，一种是利用AutoInjectDynamicDaoBeanPostProcessor，在spring中的bean初始化好之后，找到有InjectDao标注的方法就，利用动态代理生成StudentDao的代理实现并注入：
Xml代码
Java代码
public class StudentService {
private StudentDao studentDao;
@InjectDao//会被注入StudentDao动态代理实现
public void setStudentDao(StudentDao studentDao) {
this.studentDao = studentDao;
}
public class StudentService {
private StudentDao studentDao;
@InjectDao//会被注入StudentDao动态代理实现
public void setStudentDao(StudentDao studentDao) {
this.studentDao = studentDao;
}
还有另一种方式是基于FactoryBean的DynamicDaoProxy，并自己指定要实现的Dao接口，如下：
Xml代码
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