Java 使用jsp从数据库检索数据（Hibernate+；Spring+；Maven）_Java_Spring_Hibernate_Maven_Jsp

Java 使用jsp从数据库检索数据（Hibernate+；Spring+；Maven）

java spring hibernate maven jsp

Java 使用jsp从数据库检索数据（Hibernate+；Spring+；Maven）,java,spring,hibernate,maven,jsp,Java,Spring,Hibernate,Maven,Jsp,大家好。我试图从Oracle数据库检索数据，但屏幕上没有显示任何内容这是我的usersList.jsp <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <title>Spring MVC Hello World</title> </head> <body> &l

大家好。我试图从Oracle数据库检索数据，但屏幕上没有显示任何内容

这是我的

usersList.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
    <title>Spring MVC Hello World</title>
</head>

<body>
    <h2>All Users in System</h2>

    <table border="1">
        <tr>
            <th>User Id</th>
            <th>Login</th>
        </tr>
        <c:forEach items="${users}" var="user">
            <tr>
                <td>${user.userId}</td>
                <td>${user.login}</td>
            </tr>
        </c:forEach>
    </table>
</body>
</html>

我的

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <servlet> 
        <servlet-name>event</servlet-name> 
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
        <load-on-startup>1</load-on-startup> 
    </servlet> 
    <servlet-mapping> 
        <servlet-name>event</servlet-name> 
        <url-pattern>/</url-pattern> 
    </servlet-mapping>
</web-app>

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"

       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
          http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
          http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
">

    <tx:annotation-driven />
    <context:component-scan base-package="com" />

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">  
        <property name="driverClassName"  value="oracle.jdbc.driver.OracleDriver"></property>  
        <property name="url" value="jdbc:oracle:thin:@localhost:1521:xe"></property>  
        <property name="username" value="admin"></property>  
        <property name="password" value="0000"></property>  
    </bean>

    <bean id="sessionFactory"
          class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="configLocation">
            <value>
                classpath:hibernate.cfg.xml
            </value>
        </property>
        <property name = "dataSource" ref = "dataSource"></property>
    </bean>

    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
</beans>

当我尝试将一些消息放入模型时，它会显示出来。但有了“用户”属性，就什么都没有了。请帮帮我。

谢谢

试着像这样编写组件扫描：

   <context:component-scan base-package="com.controller" />

我找到了答案。我刚换了

 <c:forEach items="${users}" var="user">
       <tr>
           <td>${user.userId}</td>
           <td>${user.login}</td>
       </tr>
 </c:forEach>


${user.userId}
${user.login}

与

而且它有效

您使用哪个url？发布您的we.xml和spring.xml配置localhost:8081/Event-1.0/users/getUsers它可以工作，但没有数据。只有一个空表。bean在哪里：manager@Autowired用户管理器；您是如何实现UserManager.java的，您没有看到任何异常。它是否真的从数据库中检索到任何数据。我在文件event-servlet.xml或任何地方都看不到自动连线bean

 <c:forEach items="${users}" var="user">
       <tr>
           <td>${user.userId}</td>
           <td>${user.login}</td>
       </tr>
 </c:forEach>

<c:forEach items="${users}" var="user">
      <tr>
          <td>
              <c:out value="${user.userId}"/>
          </td>
          <td>
              <c:out value="${user.login}" />
         </td>
     </tr>
</c:forEach>