即使休眠查询正在运行，也无法从 oracle 中选择数据

Question

我点击以下网址：

 http://localhost:8080/bot1/deal/index/123

我的数据库表的数据为：

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DB data

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我的目录结构：

Directory Structure

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我遇到了异常，它正在将列表的大小打印为零，因为 sopln 语句是 DealDaoImpl，因为查询中没有数据：

休眠：选择 this_.OPTY_NUMBER 作为 OPTY_NUMBER1_0_0_， this_.PROJECT_NAME 作为 PROJECT_NAME2_0_0_ 来自 CQ_CCW_ALL_DEAL this_0 休眠：选择 this_.OPTY_NUMBER 作为 OPTY_NUMBER1_0_0_， this_.PROJECT_NAME 作为 PROJECT_NAME2_0_0_ 来自 CQ_CCW_ALL_DEAL this_ 2017 年 6 月 25 日上午 10:39:21 org.apache.catalina.core.StandardWrapperValve 为 servlet [webmvc-dispatcher] 调用 SEVERE: Servlet.service() 带有路径 [/bot1] 的上下文引发异常 [请求处理失败； 嵌套异常是 java.lang.IndexOutOfBoundsException: Index: 0, 大小：0] 根本原因 java.lang.IndexOutOfBoundsException：索引： 0，大小：0 at java.util.ArrayList.rangeCheck(Unknown Source) at java.util.ArrayList.get（未知来源）在 com.bot1.serviceImpl.DealServiceImpl.getDealDetails(DealServiceImpl.java:21) 在 com.bot1.controller.BotController.getDeal(BotController.java:34) 在 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 在 sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke（未知来源）在 java.lang.reflect.Method.invoke（未知来源）在 org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215) 在 org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) 在 org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) 在 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749) 在 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689) 在 org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83) 在 org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938) 在 org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870) 在 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) 在 org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) 在 javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 在 org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) 在 javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 在 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 在 org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) 在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 在 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 在 org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) 在 org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 在 org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 在 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 在 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 在 org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) 在 org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 在 org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:408） 在 org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041) 在 org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603) 在 org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) 在 java.util.concurrent.ThreadPoolExecutor.runWorker（未知来源） 在 java.util.concurrent.ThreadPoolExecutor$Worker.run（未知来源） 在 java.lang.Thread.run(Unknown Source)

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这是我的代码：

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <display-name>bot1</display-name>

  <context-param>
        <param-name>ApplicationContext</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>

 <servlet>
    <servlet-name>webmvc-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>


    <servlet-mapping>
        <servlet-name>webmvc-dispatcher</servlet-name>  
        <url-pattern>/</url-pattern>
    </servlet-mapping>



    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>
</web-app>

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webmvc-dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
   http://www.springframework.org/schema/beans    
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-3.0.xsd">
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

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applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
    <context:annotation-config />
    <context:component-scan base-package="com.bot1" />
    <mvc:annotation-driven />
    <mvc:resources mapping="/resources/**" location="/resources/" />
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="oracle.jdbc.OracleDriver" />
        <property name="url" value="jdbc:oracle:thin:@localhost:1521:XE" />
        <property name="username" value="system" />
        <property name="password" value="tiger" />
    </bean>
    <!-- Session Factory Declaration -->
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="packagesToScan" value="com.bot1.model" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <!-- <prop key="hibernate.enable_lazy_load_no_trans">true</prop> -->
                <!-- <prop key="hibernate.default_schema">test</prop> -->
                <prop key="format_sql">true</prop>
                <!-- <prop key="use_sql_comments">true</prop> -->
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager" />
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
</beans>

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BotController.java

package com.bot1.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.bot1.model.Deal;
import com.bot1.service.DealService;

@Controller
@RequestMapping("deal")
public class BotController {
@Autowired
private DealService dealService;

@RequestMapping(value="/index/{dealId}",method=RequestMethod.GET)   
private String getDeal(@ModelAttribute("deal1") Deal deal,@PathVariable String dealId) {

    deal= dealService.getDealDetails(dealId);
    System.out.println(deal.getDeal_id());
    System.out.println(deal.getDeal_name());    
    return null;

}
}

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DealService.java

package com.bot1.service;
import com.bot1.model.Deal;

public interface DealService {
     public Deal getDealDetails(String dealId); 
}

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DealServiceImpl.java

package com.bot1.serviceImpl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.bot1.dao.DealDao;
import com.bot1.model.Deal;
import com.bot1.service.DealService;

@Service
public class DealServiceImpl implements DealService {

    @Autowired
    private DealDao dealdao;

    public Deal getDealDetails(String dealId) {
        List<Deal> deals=dealdao.getDeal(dealId);
        return deals.get(0);
    }
}

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DealDao.java

package com.bot1.dao;

import java.util.List;

import com.bot1.model.Deal;

public interface DealDao {

      public List<Deal> getDeal(String dealId);
}

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DealDaoImpl.java

  package com.bot1.daoImpl;
    import java.util.List;
    import org.hibernate.SessionFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Repository;
    import org.springframework.transaction.annotation.Transactional;
    import com.bot1.dao.DealDao;
    import com.bot1.model.Deal;

    @Repository
    @Transactional
    public class DealDaoImpl implements DealDao{

        @Autowired
        SessionFactory sessionFactory;

        @SuppressWarnings("unchecked")
        public List<Deal> getDeal(String dealId) {


System.out.println(sessionFactory.getCurrentSession().createCriteria(Deal.class).list().size());
            return (List<Deal>) sessionFactory.getCurrentSession().createCriteria(Deal.class).list();

        }
    }

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Deal.java

package com.bot1.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "CQ_CCW_ALL_DEAL")
public class Deal {

    @Id
    @Column(name="OPTY_NUMBER")
    private String deal_id;

    @Column(name="PROJECT_NAME")
    private String deal_name;

    public String getDeal_id() {
        return deal_id;
    }
    public void setDeal_id(String deal_id) {
        this.deal_id = deal_id;
    }
    public String getDeal_name() {
        return deal_name;
    }
    public void setDeal_name(String deal_name) {
        this.deal_name = deal_name;
    }
}

Answer 1

您将收到 java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 异常。
可能是因为public Deal getDealDetails(String dealId) {..deals.get(0)..} 正在返回null。

当您基于 DB 中不存在的 dealId 获取交易时，可能会发生这种情况。

使用 dealId 作为 123 或 325。

Answer 2

有非常小的错误。从 applicationContext.xml - ， 1521:XE 被 1521/XE 替换，问题得到解决。