javaweb各种框架组合案例(四)：maven+spring+springMVC+spring data jpa（hibernate）【失败案例】
一、失败案例
1. 控制台报错信息
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'userDao'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userDao': Invocation of init method failed; nested exception is java.util.NoSuchElementException at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:443) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:325) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4797) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5291) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)
2. 初步判断
spring data jpa 无法自动实现dao层接口
3. 原因
未知，非扫描包问题
二、项目
1. 项目整体包结构
2. 业务
实现一个用户具有多部手机的业务
3. 各配置文件
（1）pom.xml
<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.xiaog</groupId> <artifactId>testssdj</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <dependencies> <!-- spring+springmvc顶级依赖包，包含spring-webmvc、spring-aop、spring-beans、 spring-context、spring-core、spring-jcl、spring-expression、spring-web --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.10.RELEASE</version> </dependency> <!-- spring-aop所依赖的静态代理 ， 使用aop方式管理事务，在service方法执行前开启事务， 方法执行后提交事务，方法执行失败回滚事务--> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.8.0</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.8.0</version> </dependency> <!-- 数据库方面 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency> <!-- orm框架 --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>4.2.2.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>4.2.2.Final</version> </dependency> <!-- spring data jpa --> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-jpa</artifactId> <version>1.11.3.RELEASE</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.25</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.25</version> </dependency> <!-- Logback --> <!-- <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic</artifactId> <version>0.9.19</version> </dependency> <dependency> <groupId>org.logback-extensions</groupId> <artifactId>logback-ext-spring</artifactId> <version>0.1.2</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>1.6.6</version> </dependency> --> <!-- jsp需要 --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>3.0-alpha-1</version> <scope>provided</scope> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.1.2</version> </dependency> </dependencies> <build> <defaultGoal>compile</defaultGoal> <plugins> <!-- maven插件 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> <!-- tomcat插件 --> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.1</version> <configuration> <port>9999</port> <path>/testssdj</path> <uriEncoding>UTF-8</uriEncoding> <finalName>testssdj</finalName> <server>tomcat7</server> </configuration> </plugin> </plugins> </build> </project>
（2）spring-context.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:context="http://www.springframework.org/schema/context" xmlns:jpa="http://www.springframework.org/schema/data/jpa" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd"> <!--指定连接池配置 --> <!-- dao层 数据库连接部分 --> <!-- 加载配置文件 --> <context:property-placeholder location="classpath:jdbc.properties" /> <!-- 配置service扫描 --> <context:component-scan base-package="com.xiaog.service" /> <!-- 数据库连接池 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <!-- 连接池的最大数据库连接数 --> <property name="maxActive" value="10" /> <!-- 最大空闲数 --> <property name="maxIdle" value="5" /> </bean> <!-- spring整合JPA --> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"></bean> </property> <!-- 配置包扫描，扫描实体 --> <property name="packagesToScan" value="com.xiaog.entity"/> <property name="jpaProperties"> <props> <!-- 生成的数据表的列的映射策略 --> <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop> <!-- hibernate 基本属性 --> <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.format_sql">true</prop> <prop key="hibernate.hbm2ddl.auto">update</prop> </props> </property> </bean> <!-- 配置事务管理器 --> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory" /> </bean> <!-- 开启事务注解 --> <tx:annotation-driven transaction-manager="transactionManager" /> <!--指定Spring Data JPA要进行扫描的包,该包中的类框架会自动为其创建代理 --> <jpa:repositories base-package="com.xiaog.dao" entity-manager-factory-ref="entityManagerFactory"></jpa:repositories> </beans>
（3）spring-mvc.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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!--配置controller扫描--> <context:component-scan base-package="com.xiaog.controller"/> <!-- 注解驱动 --> <mvc:annotation-driven/> <!--视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"/> <property name="suffix" value=".jsp"/> </bean> </beans>
（4）jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/ssdj?useSSL=false&useUnicode=true&characterEncoding=utf8 jdbc.username=root jdbc.password=root
（5）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>testssdj</display-name> <!-- spring配置文件路径 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-context.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 解决post乱码问题 --> <filter> <filter-name>encoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <!-- 设置编码参是UTF8 --> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 配置SpringMvc 前端控制器 --> <servlet> <servlet-name>spring-mvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--指定SpringMvc 配置文件 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>spring-mvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 添加日志监听器 --> <!-- <context-param> <param-name>logbackConfigLocation</param-name> <param-value>classpath:logback.xml</param-value> </context-param> <listener> <listener-class>ch.qos.logback.ext.spring.web.LogbackConfigListener</listener-class> </listener> --> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
4. 实体层
package com.xiaog.entity; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name="phone") public class Phone { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) private Integer id; private String brand;//品牌 public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getBrand() { return brand; } public void setBrand(String brand) { this.brand = brand; } @Override public String toString() { return "Phone [id=" + id + ", brand=" + brand + "]"; } }
package com.xiaog.entity; import java.util.List; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.OneToMany; import javax.persistence.Table; @Entity @Table(name="user") public class User { @Id @GeneratedValue(strategy=GenerationType.IDENTITY) private Integer id; private String username; private String password; @OneToMany(targetEntity=Phone.class) @JoinColumn(name="user_id") private List<Phone> phones;//一个用户拥有多部手机 public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public List<Phone> getPhones() { return phones; } public void setPhones(List<Phone> phones) { this.phones = phones; } @Override public String toString() { return "User [id=" + id + ", username=" + username + ", password=" + password + ", phones=" + phones + "]"; } }
5. dao层
package com.xiaog.dao; import org.springframework.data.jpa.repository.JpaRepository; import org.springframework.stereotype.Repository; import com.xiaog.entity.Phone; @Repository public interface PhoneDao extends JpaRepository<Phone, Integer> { }
package com.xiaog.dao; import org.springframework.data.jpa.repository.JpaRepository; import org.springframework.stereotype.Repository; import com.xiaog.entity.User; @Repository public interface UserDao extends JpaRepository<User, Integer> { User findByUsernameAndPassword(User user); }
6. service层
package com.xiaog.service; import com.xiaog.entity.User; public interface UserService { User login(User user); }
package com.xiaog.service.impl; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import com.xiaog.dao.UserDao; import com.xiaog.entity.User; import com.xiaog.service.UserService; @Service @Transactional public class UserServiceImpl implements UserService { @Autowired private UserDao userDao; private final static Logger logger = LoggerFactory.getLogger(UserServiceImpl.class); @Override public User login(User user) { //logger.info("进入UserServiceImpl......"); user = userDao.findByUsernameAndPassword(user); logger.info("user="+user); return user; } }
7.controller层
package com.xiaog.controller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import com.xiaog.entity.User; import com.xiaog.service.UserService; @Controller @RequestMapping("/user") public class UserController { @Autowired(required=false) private UserService userService; private final static Logger logger = LoggerFactory.getLogger(UserController.class); @RequestMapping(value = "/login",params= {"username","password","username!=","password!="}) public String login(Model model,User user) { logger.info("user(request)="+user); user = userService.login(user); logger.info("user="+user); model.addAttribute("user", user); return "result"; } }
8.jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="user/login" method="post">
<div>
<label>username</label>
<input type="text" name="username"/>
</div>
<div>
<label>password</label>
<input type="password" name="password"/>
</div>
<div>
<input type="submit" value="登录">
</div>
</form>
</body>
</html>index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!doctype html> <html> <head> <meta charset="UTF-8"> <title></title> </head> <body> username=${user} </body> </html>
result.jsp
三、求解决
若有大神能够解决问题，在下感激不尽
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