公司用SpringMVC +Hibernate JPA+Spring-data-jpa 開發。之前沒有用過Spring-data-jpa 就想簡單用下。
applicationContext.xml配置如下：
<?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:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.0.xsd"
default-lazy-init="true">
<description>Spring公共配置 </description>
<!-- 開啟AOP監聽，隻對目前配置檔案有效 -->
<aop:config proxy-target-class="true" />
<!-- 使用annotation 自動注冊bean, 并保證@Required、@Autowired的屬性被注入 <context:component-scan
base-package="com.csair"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan> -->
<context:component-scan base-package="com.csair">
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller" />
<context:exclude-filter type="annotation"
expression="org.springframework.web.bind.annotation.ControllerAdvice" />
</context:component-scan>
<!-- 資料源配置, 使用DBCP資料庫連接配接池 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<!-- Connection Info -->
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<!-- Connection Pooling Info -->
<property name="maxActive" value="${dbcp.maxActive}" />
<property name="maxIdle" value="${dbcp.maxIdle}" />
<property name="defaultAutoCommit" value="false" />
<!-- 連接配接Idle一個小時後逾時 -->
<property name="timeBetweenEvictionRunsMillis" value="3600000" />
<property name="minEvictableIdleTimeMillis" value="3600000" />
</bean>
<!-- JPA實體管理工廠的配置 -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter" />
<property name="packagesToScan" value="com.csair.entity" /><!--待掃描的實體類包，不再需要persistence.xml了 -->
<property name="jpaProperties">
<props>
<prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
<!--指定實作JPA的擴充卡 -->
<bean id="hibernateJpaVendorAdapter"
class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" />
</bean>
<!-- Jpa 事務配置 -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<!-- Spring Data Jpa 配置 Spring -->
<!-- 初始化容器時将會掃描 base-package 指定的包目錄及其子目錄，為繼承 Repository 或其子接口的接口建立代理對象，并将代理對象注冊為
Spring Bean -->
<!-- base-package 掃描的包 -->
<!-- repository-impl-postfix 倉庫自定義實作類的字尾。自動掃描該名稱帶有該字尾的類，并添加到接口的實作 -->
<!-- factory-class 倉庫接口的實作工廠 -->
<jpa:repositories base-package="com.csair.repository"
entity-manager-factory-ref="entityManagerFactory"
transaction-manager-ref="transactionManager">
</jpa:repositories>
<!-- 使用annotation定義事務 -->
<tx:annotation-driven transaction-manager="transactionManager"
proxy-target-class="true" />
<!-- JSR303 Validator定義 -->
<bean id="validator"
class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" />
<!-- production環境 -->
<beans profile="production">
<context:property-placeholder
ignore-unresolvable="true" location="classpath*:/db.properties" />
</beans>
<!-- local development環境 -->
<beans profile="development">
<context:property-placeholder
ignore-resource-not-found="true"
location="classpath*:/db.properties,
classpath*:/db_dev.properties" />
</beans>
<!-- unit test環境 -->
<beans profile="test">
<context:property-placeholder
ignore-resource-not-found="true" location="classpath*:/db_test.properties" />
</beans>
</beans>
spring-servlet.xml 配置如下
<?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" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<!-- 開啟AOP監聽，隻對目前配置檔案有效 -->
<aop:config proxy-target-class="true" />
<!-- 基于@AspectJ切面的驅動器 -->
<aop:aspectj-autoproxy />
<!-- 激活@Controller模式 -->
<mvc:annotation-driven />
<context:component-scan base-package="com.csair.controller" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
<context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice" />
</context:component-scan>
<!-- 對包中的所有類進行掃描，以完成Bean建立和自動依賴注入的功能 需要更改 -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
</beans>
web.xml 如下
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" metadata-complete="true" version="3.0">
<display-name>Archetype Created Web Application</display-name>
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>classpath*:/log4j.xml</param-value>
</context-param>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:/applicationContext*.xml</param-value>
</context-param>
<!-- 設定Spring Context的預設Profile -->
<context-param>
<param-name>spring.profiles.default</param-name>
<param-value>development</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 字元集編碼 -->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<!-- 配置spring mvc -->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:/spring-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
</web-app>
實體User
package com.csair.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import org.hibernate.annotations.GenericGenerator;
@Entity
@Table(name="i_user")
public class User {
/**
*
*/
private static final long serialVersionUID = 1L;
private Integer id;
private String username;
private String password;
@Id
@GeneratedValue(generator="system-uuid")
@GenericGenerator(name="system-uuid",strategy="uuid")
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
@Column(name="username")
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
@Column(name="password")
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
UserRepository 類如下：
package com.csair.repository;
import org.springframework.data.jpa.repository.JpaRepository;
import com.csair.entity.User;
public interface UserRepository extends JpaRepository<User, Integer>{
}
UserService 接口
package com.csair.service;
import com.csair.entity.User;
public interface UserService {
public User getUser(int id);
}
接口實作類
package com.csair.service.Impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.csair.entity.User;
import com.csair.repository.UserRepository;
import com.csair.service.UserService;
@Service
public class UserServiceImpl implements UserService {
@Autowired
UserRepository repository;
public UserRepository getRepository() {
return repository;
}
@Override
public User getUser(int id) {
// TODO Auto-generated method stub
return repository.findOne(id);
}
}
Controller 類如下：
package com.csair.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.csair.entity.User;
import com.csair.service.UserService;
@Controller
@RequestMapping(value="/user")
public class UserController {
@Autowired
private UserService userSerivce;
@RequestMapping(value="/welcome")
public ModelAndView getUser(ModelAndView modelView)
{
User user = userSerivce.getUser(1);
return new ModelAndView("welcome","user",user);
}
}
</pre><pre>
關于jsp 頁面就不貼了
以上基本就是 SpringMVC +Hibernate JPA+Spring-data-jpa 開發環境內建。
但是 問題來了：
java.lang.ClassNotFoundException: org.springframework.data.mapping.IdentifierAccessor
這個錯網上很難找到答案，多數是說程式或者配置有問題。這個我自己也糾結了很久。不過最終還是解決了。
這個問題主要是
spring-data-commons.jar
spring-data-jpa.jar 版本依賴問題。
一般很難發現這個問題，因為版本就算依賴有問題也編譯時代碼不會報錯，隻有在釋出的時候會報錯。
我遇到這個問題是因為我知道要以上兩個包就去spring官網去下載下傳 ，下載下傳的時候沒有考慮到版本依賴問題，後來程式跑不起來，總以為是自己配置有問題。然後各種改配置仍然不行。最後想了很久用了maven來下載下傳包，依賴問題解決了。 這裡建議如果在依賴不明的情況下，用maven下載下傳包。這樣就不會出現因為包依賴問題導緻程式跑不起來，浪費自己的時間。
最後給一下執行個體位址
http://download.csdn.net/detail/lj1314ailj/8943455
![org.hibernate.HibernateException: /hibernate.cfg.xml not found[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)