Easyjweb+Spring2+JPA 实现一个基本CRUD应用示例

package com.easyjf.demo;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;@Entity
public class Person { @Id
 @GeneratedValue(strategy=GenerationType.TABLE)
 private Long id;
 private String name;
 private String sex; public Long getId() {
  return id;
 } public void setId(Long id) {
  this.id = id;
 } public String getName() {
  return name;
 } public void setName(String name) {
  this.name = name;
 } public String getSex() {
  return sex;
 } public void setSex(String sex) {
  this.sex = sex;
 }
}

建立服务接口
服务接口抽象出了模型要进行的相关逻辑操作，本例中用了简单的CRUD操作来进行业务操作。

IPersonService.java

 package com.easyjf.demo;
import java.io.Serializable;
import java.util.List;
public interface IPersonService { public List<Person> findAll();
 public void save(Person p);
 public void remove(Serializable id);
 public Person find(Serializable id);
 
}

建立服务实现
实现了接口中描述的操作。

PersonServiceImpl.java

 package com.easyjf.demo;
import java.io.Serializable;
import java.util.List;import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;import org.springframework.transaction.annotation.Transactional;@Transactional
public class PersonServiceImpl implements IPersonService { @PersistenceContext
 private EntityManager em; @SuppressWarnings("unchecked")
 public List<Person> findAll() {
  Query q = this.getEm().createQuery("select p FROM Person p");
  return q.getResultList();
 } public Person find(Serializable id) {
  return this.getEm().find(Person.class, id);
 } public void remove(Serializable id) {  Person p = this.find(id);
  if (p != null) {
   this.getEm().remove(p);
  }
 } public void save(Person p) {  if (p.getId() == null) {
   this.getEm().persist(p);
  } else {
   this.getEm().merge(p);
  }
 } public EntityManager getEm() {
  return em;
 } public void setEm(EntityManager em) {
  this.em = em;
 }}

建立MVC控制层
整合模型，业务层，控制视图的输出。

PersonAction.java

 package com.easyjf.demo;import java.util.List;import com.easyjf.container.annonation.Inject;
import com.easyjf.web.Module;
import com.easyjf.web.Page;
import com.easyjf.web.WebForm;
import com.easyjf.web.core.AbstractPageCmdAction;public class PersonAction extends AbstractPageCmdAction { @Inject
 private IPersonService personService; public Page doInit(WebForm f, Module m) {
  return go("list");
 } public void doList(WebForm form) {
  List<Person> list = this.personService.findAll();
  form.addResult("list", list);
 } public void doSave(WebForm form) {
  Person p = form.toPo(Person.class);
  this.personService.save(p);
  go("list");
 } public void doNew() {
  page("edit");
 } public void doEdit(WebForm form) {
  Long id = new Long(form.get("id").toString());
  Person p = this.personService.find(id);
  form.addPo(p);
 } public void doDelete(WebForm form) {
  Long id = new Long(form.get("id").toString());
  this.personService.remove(id);
  go("list");
 } public void setPersonService(IPersonService personService) {
  this.personService = personService;
 }
}

建立JPA配置文件/src/main/java/META-INF/persistence.xml,用来定义Spring的应用单元。

&nbsp;
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
&nbsp;version="1.0">
&nbsp;<persistence-unit name="app-unit"
&nbsp;&nbsp;transaction-type="RESOURCE_LOCAL">
&nbsp;</persistence-unit>
</persistence>

建立Spring配置文件/src/main/java/application.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:aop="http://www.springframework.org/schema/aop"
 xmlns:tx="http://www.springframework.org/schema/tx"
 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/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <bean
  class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> <bean id="transactionManager"
  class="org.springframework.orm.jpa.JpaTransactionManager">
  <property name="entityManagerFactory"
   ref="entityManagerFactory" />
 </bean> <tx:annotation-driven transaction-manager="transactionManager" /> <bean id="dataSource"
  class="org.springframework.jdbc.datasource.DriverManagerDataSource">
  <property name="driverClassName" value="com.mysql.jdbc.Driver" />
  <property name="url"
   value="jdbc:mysql://localhost/demo?createDatabaseIfNotExist=true" />
  <property name="username" value="root" />
  <property name="password" value="" />
 </bean> <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">
    <property name="database" value="MYSQL" />
    <property name="generateDdl" value="true" />
    <property name="showSql" value="true" />
   </bean>
  </property>
 </bean> <bean id="personService" class="com.easyjf.demo.PersonServiceImpl" />
</beans>

修改web.xml，使EasyJWeb能处理用户请求。

 <?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
 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_2_5.xsd">
 <!--定义easyjweb的配置文件位置 -->
 <context-param>
  <param-name>easyjwebConfigLocation</param-name>
  <param-value>/WEB-INF/mvc.xml</param-value>
 </context-param>
 <!--定义EasyJWeb的主控Servlet  -->
 <servlet>
  <servlet-name>easyjf</servlet-name>
  <servlet-class>com.easyjf.web.ActionServlet</servlet-class>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>easyjf</servlet-name>
  <url-pattern>*.ejf</url-pattern><!--所有.ejf的扩展名都由easyjweb来处理-->
 </servlet-mapping>
 <servlet-mapping>
  <servlet-name>easyjf</servlet-name>
  <url-pattern>/ejf/*</url-pattern><!--所有/ejf/*样式的url都交由EasyJWeb来处理-->
 </servlet-mapping>
 <!-- 定义字符处理Filter -->
 <filter>
  <filter-name>CharsetFilter</filter-name>
  <filter-class>com.easyjf.web.CharsetFilter</filter-class>
  <init-param>
   <param-name>encoding</param-name>
   <param-value>UTF-8</param-value>
  </init-param>
  <init-param>
   <param-name>ignore</param-name>
   <param-value>true</param-value>
  </init-param>
 </filter>
 <filter-mapping>
  <filter-name>CharsetFilter</filter-name>
  <servlet-name>easyjf</servlet-name>
 </filter-mapping>
 
 <!-- 定义内容输出压缩Filter -->
 <filter>
  <filter-name>GZIPFilter</filter-name>
  <filter-class>com.easyjf.web.GZIPFilter</filter-class>
 </filter>
 <filter-mapping>
  <filter-name>GZIPFilter</filter-name>
  <servlet-name>easyjf</servlet-name>
 </filter-mapping>
 
</web-app>

建立easyjweb配置文件/src/main/webapp/WEB-INF/mvc.xml

 <?xml version="1.0" encoding="UTF-8"?>
<easyjf-web xmlns="http://www.easyjf.com/schema/easyjf/web"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://www.easyjf.com/schema/easyjf/web http://www.easyjf.com/schema/easyjf/web/easyjf-web-0.0.1.xsd">
 <beans>
  <!-- 申明Spring为easyjweb 应用容器开始 -->
  <bean name="springContainer"
   class="org.springframework.web.context.support.XmlWebApplicationContext">
   <property name="configLocations">
    <list>
     <value>WEB-INF/classes/application.xml</value>
    </list>
   </property>
  </bean>
  <bean name="innerSpringContainer"
   class="com.easyjf.container.impl.SpringContainer">
   <property name="factory" ref="springContainer" />
  </bean>
  <!-- 申明Spring为easyjweb 应用容器结束 -->
 </beans>
 <modules>
  <!-- easyjweb 模块定义开始 -->
  <module name="person" path="/person"
   action="com.easyjf.demo.PersonAction">
  </module>
  <!-- easyjweb 模块定义结束 -->
 </modules>
</easyjf-web>

建立模板文件edit.html，路径：/src/main/webapp/WEB-INF/views/person/edit.html,此模板用于呈现添加和编辑界面，内容如下：

 <form method="post" action="$!html.forward('save')" name="edit">
<input type="hidden" name="id" value="${id}" />
姓名：<input type="text" maxlength="20" size="20" value="$!{name}" name="name"><br />
性别：<input type="text" maxlength="20" size="20" value="$!{sex}" name="sex"><br />
<input type="submit" value="提交" name="submit">
<input type="button" value="返回" name="return" onclick="window.location.href='$!html.forward('list')';">
 
</form>

建立模板文件list.html，路径/src/main/webapp/WEB-INF/views/person/list.html,此模板用于呈现列表数据，内容如下：

 <a href="$!html.forward('person.new')"><b>添加</b></a><br />
#foreach ( $info in $list ) 姓名：$info.name <br />
性别：$info.sex $info.id <br />
<a href="$!html.url('person')/edit/$info.id">编辑</a>
<a href="$!html.url('person')/delete/$info.id">删除</a>
<hr>
#end

到此，一个EASYJWEB的CRUD程序就出来了。

把应用拷到Tomcat下的webapp目录，比如应该目录为myapp，则启动tomcat后，即可通过下面的地址访问：
http://localhost:8080/myapp/ejf/person

下载JAR包：

本文所用到的相关包

antlr-2.7.6.jar
asm-1.5.3.jar
cglib-2.1_3.jar
commons-collections-3.2.jar
commons-fileupload-1.0.jar
commons-logging-1.0.4.jar
dom4j-1.6.1.jar
easydbo-0.9.1.jar
easyjweb-core-1.0.1.jar
easyjweb-ext-1.0.1.jar
hibernate-3.2.2.ga.jar
hibernate-annotations-3.2.1.ga.jar
hibernate-entitymanager-3.2.1.ga.jar
javassist-3.3.ga.jar
jaxen-1.1-beta-4.jar
jboss-archive-browsing-5.0.0alpha-200607201-119.jar
jta-1.0.1B.jar
log4j-1.2.14.jar
mysql-connector-java-5.0.5.jar
persistence-api-1.0.jar
spring-2.0-rc2.jar
velocity-1.4.jar

参考文献：

struts实现可参考
http://struts.apache.org/2.x/docs/struts-2-spring-2-jpa-ajax.html
EasyJWeb快速入门
http://www.easyjf.com/easyjweb/gettingstart.htm
EasyJWeb开发指南
http://www.easyjf.com/easyjweb/EasyJWeb-developer-Guide.doc

本文相关资源：
所有JAR文件下载地http://www.easyjf.com/download/easyjweb/easyjweb-quickstart-crud-libs.zip

本应用源代码下载地址http://www.easyjf.com/download/easyjweb/easyjweb-quickstart-crud-src.zip

本应用源码加LIB下载地址：

http://www.easyjf.com/download/easyjweb/easyjweb-quickstart-crud.zip