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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&amp;useUnicode=true&amp;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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原文地址：https://www.cnblogs.com/xiaogblog/p/11118726.html