/*
* T代表操作的泛型类
* ID 代表实体类主键类型
*/
public interface StandardDao extends JpaRepository {
}
测试
方法名解析查询
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class StandardTest {
@Resource //注入StandardDao
private StandardDao standardDao;
//方法名解析查询findlByName
@Test
public void test2(){
List list = standardDao.findByName("10~20公斤");
for(Standard s:list){
System.out.println(s.getName());
}
}
}
Query查询
//Query注解查询
@Test
public void test4(){
List list = standardDao.getByNameLike("%20%");
for(Standard s:list){
System.out.println(s.getName());
}
}
Dao持久层
public interface StandardDao extends JpaRepository {
List findByName(String string);
List findByNameLike(String string);
@Query("from Standard where name like ?1")//1代表参数1赋值给name 复杂查询 JPQL 相当于HQL
List getByNameLike(String string);
}
注解开发流程
Action
//struts2注解
@ParentPackage("struts-default")
@Namespace("/")
@Actions
//spring注解
@Controller
@Scope("prototype")
public class StandardAction extends ActionSupport implements ModelDriven {
private Standard model=new Standard();
@Override
public Standard getModel() {
// TODO Auto-generated method stub
return model;
}
@Autowired
private IStandardService standardService;
//添加保存
@Action(value="standardAction_add",results={@Result(name="add",location="/pages/base/standard.jsp")})
public String add(){
standardService.add(model);
return "add";
}
Service层
@Service
public class StandardServiceImpl implements IStandardService {
@Autowired
private StandardDao standardDao;
@Override
public void add(Standard model) {
// TODO Auto-generated method stub
standardDao.save(model);
}
Dao层
public interface StandardDao extends JpaRepository {
}
利用javascript读取表单数据，可以利用以下三种方法获取：
1、通过表单ID属性：var a = document.getElementByIdx_x_x("id");
2、通过表单名称属性：var b = document.getElementsByName("name");
3、直接通过表单名字获取：var c = form.content.
什么是Spring Data Mongo
Spring Data MongoDB项目对访问MongoDB的Java客户端API进行了封装，这种封装类似于Spring封装Hibernate和JDBC而提供的HibernateTemplate和JDBCTemplate，主要能力包括
1. 封装客户端跟MongoDB的链接管理
2. 文档-对象映射，通过注解:@Document(collectio
The insertion algorithm for 2-3 trees just described is not difficult to understand; now, we will see that it is also not difficult to implement. We will consider a simple representation known
