我的PL / pgSQL函数运行正常。我测试了它
CREATE OR REPLACE FUNCTION topAlerte()
RETURNS void AS
$$
DECLARE
max_var_risk varchar(70);
max_mvar_risk varchar(70);
max_incvar_risk varchar(70);
max_cvar_risk varchar(70);
amount varchar(70);
delta varchar(70);
net_exposure varchar(70);
BEGIN
truncate tops;
select names from risk where risk.var_mc_risk =(select max(risk.var_mc_risk) from risk) into max_var_risk ;
select names from risk where risk.mvar_mc_risk =(select max(risk.mvar_mc_risk) from risk) into max_mvar_risk ;
select names from risk where risk.inc_var_mc_risk =(select max(risk.inc_var_mc_risk) from risk) into max_incvar_risk ;
select names from risk where risk.cvar_mc_risk =(select max(risk.cvar_mc_risk) from risk) into max_cvar_risk ;
select names from risk where risk.amount =(select max(risk.amount) from risk) into amount ;
select names from risk where risk.delta =(select max(risk.delta) from risk) into delta;
select names from risk where risk.net_exposure =(select max(risk.net_exposure) from risk) into net_exposure ;
INSERT INTO tops VALUES
(max_var_risk, max_mvar_risk, max_incvar_risk, max_cvar_risk,amount,delta,net_exposure);
END ;
$$
LANGUAGE 'plpgsql';
我想从春季启动调用它,这是我的DAO:
public interface TopRepository {
public List getTopsAlert()throws Throwable;
}
这是我的服务(接口实现):
public class TopAlertMetier implements TopRepository{
@Override
public List getTopsAlert() throws Throwable {
List<String> myList= new ArrayList<>();
Class.forName("org.postgresql.Driver");
Connection connect= null;
connect = (Connection) DriverManager.getConnection("jdbc:postgresql://localhost:5432/bourse","postgres","123456");
java.sql.CallableStatement proc = connect.prepareCall("{topAlerte()}");
proc.registerOutParameter(1, java.sql.Types.VARCHAR);
proc.executeQuery();
ResultSet results = (ResultSet) proc.getObject(1);
myList.add(results.getString(0));
myList.add(results.getString(1));
myList.add(results.getString(2));
myList.add(results.getString(3));
myList.add(results.getString(4));
myList.add(results.getString(5));
myList.add(results.getString(6));
return myList;
}
和我的控制器:
@RestController
public class topController {
@Autowired
TopRepository topRepository;
@RequestMapping(value="/alert",method = RequestMethod.GET)
public @ResponseBody List alert() throws Throwable{
return topRepository.getTopsAlert();
}
列表显示了最大值的名称,因此它必须包含表格的值&#34; tops&#34; 当运行服务器时:mvn spring-boot:run 日志显示异常:
字段topRepository中 com.Friendly_road.Flight.controller.topController需要一个bean 键入&#39; com.Friendly_road.Flight.dao.TopRepository&#39;那不可能 找到。
答案 0 :(得分:0)
这种在DAO中使用存储过程的方式是某种“手工制造”且危险的。您实现的配置步骤在每次方法调用时完成,并且非常容易出错。它甚至不再可配置与数据库配置等相关。
文中说你正在使用Spring Boot,那么为什么不使用DataSourceAutoConfiguration
并在application.properties / application.yml文件中维护你的数据库配置呢?这样你就可以让Spring管理你的数据源。这样可以简化事务处理并使用连接池,这样更方便。
这是一个很好的article。
除此之外,如果您使用Spring Data JPA存储库接口,则无需自行实现过程调用。您可以通过类似的方式轻松实现存储过程调用(假设您有类似Top Reality的内容):
@Repository
public interface TopRepository extends CrudRepository<Top, Long> {
...
@Procedure(procedureName = "topAlerte")
List getTopAlerte();
...
}