SpringMVC+JPA（上）

最新推荐文章于 2025-08-06 22:06:43 发布

IT_xxeedd

最新推荐文章于 2025-08-06 22:06:43 发布

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分类专栏： Spring 整合文章标签： spring JPA

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本文介绍了一种使用SpringMVC与JPA相结合的技术方案，涵盖了实体类定义、DAO层实现、Service业务逻辑处理及Controller层的具体实现。通过示例代码展示了如何进行增删改查操作，并提供了自定义SQL及分页功能的实现方法。

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SpringMVC+JPA

@Entity
@Table(name = "TABLE_NAME")
@SequenceGenerator(name = "SEQ_ALIAS_NAME",sequenceName =
"SEQ_Name",allocationSize = 1)
    @Id
    @Column(name = "COLUMN_NAME")
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "SEQ_ALIAS_NAME")

DAO

//DAO
public interface DAO extends JpaRepository<PO,Serializable>,DAOCustom {
...
}

//DAO扩展接口
public interface DAOCustom {
...
}

//实现类
@Repository
public class DAOImpl implements DAOCustom {

    @PersistenceContext(unitName = "fpsUnit")
    protected EntityManager entityManager;
    //insert delete update
    public void updateInfo(){
            String sql = "";
            Query query = entityManager.createNativeQuery(sql);
            query.executeUpdate();
    }
    //自定义sql+分页
    public List<PO> getListBySQL(Integer start,Integer end){
                return (new AbstractPagingQuery<TrackMoneyConfirmVO>(entityManager) {
            @Override
            public String getQuerySql() {
                String sql = "";
                return sql;
            }
        }).getData(start,end);

    }
    ...
}

Service

@Service
public class TrackMoneyConfirmService {

    @Inject
    private DAO DAO;

    @Transactional(value = "transactionManagerName")
    public void update(){
    DAO.update()
    }
}

Controller

@controller
public class IndexController{
    @Inject
    private Service service;
    //普通get请求
    @RequestMapping(value="/URL",method = RequestMethod.GET)
    public String toIndex(Model model,HttpServletReqest request){
        return "index";
    }
    //post请求 返回json串
    @RequestMapping(value = "/url",method= RequestMethod.POST,produces="text/html;charset=UTF-8")
    @ResponseBody
    public String returnJSON(){
        return "JSON.......";
    }
    //从url获取参数
    @RequestMapping(value = "/url/{argName0}/{argName1}")
    public String downloadPDF(@PathVariable Long argName0, @PathVariable String argName1, HttpServletResponse response, ModelMap model) {
}

从properties文件中取值

    @Value("${propertyName}")
    private Long xxx;

配置文件在下篇博客中贴出来