Java 希望使用applicationContext或WebApplicationContext在Servlet中使用Springbean。我怎样才能做到这一点_Java_Spring_Jsp_Jpa_Servlets

Java 希望使用applicationContext或WebApplicationContext在Servlet中使用Springbean。我怎样才能做到这一点

java spring jsp jpa servlets

Java 希望使用applicationContext或WebApplicationContext在Servlet中使用Springbean。我怎样才能做到这一点,java,spring,jsp,jpa,servlets,Java,Spring,Jsp,Jpa,Servlets,============================web.xml================= <?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_ID" version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocat

============================web.xml=================

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" 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">
<display-name>loginBasic</display-name>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:/spring.xml</param-value>
</context-param>

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

  <welcome-file-list>
    <welcome-file>siteMendorLogin.jsp</welcome-file>
  </welcome-file-list>

 <!--  <servlet>
        <servlet-name>siteMendorLogin</servlet-name>
        <servlet-class>com.firstApp.servlet.SiteMendorLogin</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>siteMendorLogin</servlet-name>
        <url-pattern>/site</url-pattern>
    </servlet-mapping> -->

  <session-config>
        <session-timeout>15</session-timeout>
  </session-config>

</web-app>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>${spring.version}</version>
</dependency>

这似乎是maven pom中缺少的一些依赖项。检查您是否具有以下依赖项：


org.springframework
spring上下文
${spring.version}
org.springframework
弹簧网
${spring.version}

还可以尝试将param值更改为classpath*：spring.xml

根据更新的错误：

init（）方法缺少对super.init（config）的调用。添加此调用以初始化servletContext，错误可能会消失。

是否可以按如下方式更改上下文参数一,


上下文配置位置
/WEB-INF/spring.xml
（或）
上下文配置位置
classpath*：/spring.xml

二,。右键单击项目->部署程序集->添加->构建路径条目->maven依赖项

参考：

如果您使用的是

Spring

，为什么要编写servlet？使用.

java.lang.ClassNotFoundException:org.springframework.web.context.ContextLoaderListener

您似乎没有在服务器中正确部署Spring。您可以发布您的Spring.xml吗？@Andreas，必须重定向到其他具有cookie的应用程序不确定，如果你能用mvc和How做到这一点，我仍然不确定你是否正在将必要的JAR复制到你的应用程序库文件夹中。Tomcat可以访问你的spring.xml文件，问题是它找不到spring web jar。已经有了这些依赖项…尝试检查classpath*：spring.xml的参数值，仍然没有更改…得到相同的错误我还注意到你在pom的打包元素中使用了“jar”。有什么特别的原因吗？哦，是的，那应该是战争，事实上我首先创建了服务端代码，现在使之成为动态web项目。。将其更改为war.have已将Maven依赖项添加到部署程序集并运行，不再出现ContextLoaderListener错误，但使用WebAppApplicationContext访问服务bean的问题仍然存在。您的意思是更改my spring.xml的位置吗，bcs否则我有相同的上下文参数spring配置文件应该在wep app->WEB-INF->spring.xml中尝试添加此spring版本，spring和java版本应该是兼容的。4.1.5.release您使用的java版本是什么？我使用的是jdk1.7

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>SiteMendor Login</title>
</head>
<body>
    <form action="Site" method="post">  
        <pre>UserId   :  <input type="text" name="userId"/><br/> </pre>
        <pre>UserName  :  <input type="text" name="userName"/><br/> </pre>
        <pre>Password  :  <input type="password" name="userPass"/><br/> </pre> 
        <input type="submit" value="login"/>  
    </form>  

</body>
</html>

<?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:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p"
    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 
    http://www.springframework.org/schema/tx 
    http://www.springframework.org/schema/tx/spring-tx.xsd">

    <tx:annotation-driven />

    <context:component-scan base-package="com.firstApp.spring.tx.dao.impl" />
    <context:component-scan base-package="com.firstApp.spring.tx.user.impl" />

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/poc_data" />
        <property name="username" value="root" />
        <property name="password" value="root" />
    </bean>

    <bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="persistenceUnitName" value="testPU" />
        <property name="dataSource" ref="dataSource" />
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

</beans>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.firstApp.spring.tx</groupId>
    <artifactId>com.myFirstApp</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>com.myFirstApp</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>3.2.5.RELEASE</spring.version>
        <hibernate.version>4.1.9.Final</hibernate.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernate.version}</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>${hibernate.version}</version>
        </dependency>

        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.2.2</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.15</version>
        </dependency>

        <dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
</dependency>

        <dependency>
    <groupId>antlr</groupId>
    <artifactId>antlr</artifactId>
    <version>2.7.7</version>
</dependency>

    </dependencies>
</project>

javax.servlet.ServletException: Servlet.init() for servlet com.firstApp.servlet.MyServletLogin threw exception
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    java.lang.Thread.run(Thread.java:745)
root cause 
java.lang.NullPointerException
    javax.servlet.GenericServlet.getServletContext(GenericServlet.java:125)
    com.firstApp.servlet.MyServletLogin.init(MyServletLogin.java:38)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    java.lang.Thread.run(Thread.java:745)

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>${spring.version}</version>
</dependency>

 <context-param>
       <param-name>contextConfigLocation</param-name>
       <param-value>/WEB-INF/spring.xml</param-value>
       </context-param>
(or)

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:/spring.xml</param-value>
    </context-param>