Example of struts 2 + spring 2 + JPA + Ajax

 

The official struts tutorial provides the following example: struts 2 + spring 2 + JPA + Ajax. The source address is:

Http://struts.apache.org/2.3.1.1/docs/struts-2-spring-2-jpa-ajax.html

After downloading the example, manually import the package to build it. I used the 2.3.1 package and encountered many problems during the build. This is mainly about the package relationship and some changes after struts is updated.

Made the following changes:

1struts2. 0 Ajax supports mainly DWR and dojo and provides Ajax topics, such as <s: Head theme = "ajax"/>, but not in struts2.1, and put the original Ajax theme into the dojo plug-in, we need to add a struts2-dojo-plugin.jar in the project, introduce the dojo tag to the JSP page

<%@ taglib uri="/struts-dojo-tags" prefix="sx" %>

2. Change <s: Head theme = "ajax"/>

<s:head theme="xhtml" /><sx:head parseContent="true" />

3. replace some of the original <s: With <SX:. You can follow the prompts in eclipse to change them. If an error is reported, you can delete theme = "ajax"

4. verification fails, so verification is removed.

5. If everything is ready, an error is returned:

FreeMarker template error!Expression parameters.pushId is undefined on line 24, column 6 in template/ajax/a-close.ftl.The problematic instruction:----------==> if parameters.pushId [on line 24, column 1 in template/ajax/a-close.ftl]

Therefore, the following operations are performed according to the method of a page:
The template problems you are having can be fixed by copying the template files into your local project (keeping the template/ajax directory structure) and changing the FTL so that they check for the existence of the parameter first I. e. change to: <# If
Parameters. pushid? Exists & parameters. pushid>.

The error message is found. Two files are copied and the statement <# If parameters. pushid? Exists & parameters. pushid>.

Code and structure:

1. Use the MySQL database

CREATE Database quickstart

CREATE TABLE 'quickstart'.'Person' (  'id' INTEGER UNSIGNED NOT NULL AUTO_INCREMENT,  'firstName' VARCHAR(45) NOT NULL,  'lastName' VARCHAR(45) NOT NULL,  PRIMARY KEY('id'))ENGINE = InnoDB;

2 use the following packages

3. directory structure

3 Java code:

Person. Java

@ Entity indicates using JPA entities. The @ ID mentioned above indicates that this is ID and @ generatedvalue automatically generates the id value.

package quickstart.model;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class Person {    @Id    @GeneratedValue    private Integer id;    private String lastName;    private String firstName;    public String getFirstName() {        return firstName;    }    public void setFirstName(String firstName) {        this.firstName = firstName;    }    public String getLastName() {        return lastName;    }    public void setLastName(String lastName) {        this.lastName = lastName;    }    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }}

Personservice. Java

package quickstart.service;import java.util.List;import quickstart.model.Person;public interface PersonService {    public List<Person> findAll();    public void save(Person person);    public void remove(int id);    public Person find(int id);}

Personserviceimpl. Java

@ Persistencecontext: Specifies the JPA context and sets the object manager. @ Transactionalif
The class is annotated as @ transactional, spring will make sure that its methods run inside a transaction.

package quickstart.service;import java.util.List;import javax.persistence.EntityManager;import javax.persistence.PersistenceContext;import javax.persistence.Query;import org.springframework.transaction.annotation.Transactional;import quickstart.model.Person;@Transactionalpublic class PersonServiceImpl implements PersonService {    private EntityManager em;    @PersistenceContext    public void setEntityManager(EntityManager em) {        this.em = em;    }    @SuppressWarnings("unchecked")    public List<Person> findAll() {        Query query = getEntityManager().createQuery("select p FROM Person p");        return query.getResultList();    }    public void save(Person person) {        if (person.getId() == null) {            // new            em.persist(person);        } else {            // update            em.merge(person);        }    }    public void remove(int id) {        Person person = find(id);        if (person != null) {            em.remove(person);        }    }    private EntityManager getEntityManager() {        return em;    }    public Person find(int id) {        return em.find(Person.class, id);    }}

/Personaction. Java

package quickstart.action;import java.util.List;import quickstart.model.Person;import quickstart.service.PersonService;import com.opensymphony.xwork2.Action;import com.opensymphony.xwork2.Preparable;public class PersonAction implements Preparable {    private PersonService service;    private List<Person> persons;    private Person person;    private Integer id;   public PersonAction(PersonService service) {        this.service = service;    }    public String execute() {        this.persons = service.findAll();        return Action.SUCCESS;    }    public String save() {        this.service.save(person);        this.person = new Person();        return execute();    }    public String remove() {        service.remove(id);        return execute();    }    public List<Person> getPersons() {        return persons;    }    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public void prepare() throws Exception {        if (id != null)            person = service.find(id);    }    public Person getPerson() {        return person;    }    public void setPerson(Person person) {        this.person = person;    }}

4. configuration document

Persistence. xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"    version="1.0">    <persistence-unit name="punit">    </persistence-unit></persistence>

Struts. xml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"    "http://struts.apache.org/dtds/struts-2.0.dtd"><struts>    <constant name="struts.objectFactory" value="spring" />    <constant name="struts.devMode" value="true" />    <package name="person" extends="struts-default">        <action name="list" method="execute" class="personAction">            <result>pages/list.jsp</result>            <result name="input">pages/list.jsp</result>        </action>        <action name="remove" class="personAction" method="remove">            <result>pages/list.jsp</result>            <result name="input">pages/list.jsp</result>        </action>        <action name="save" class="personAction" method="save">            <result>pages/list.jsp</result>            <result name="input">pages/list.jsp</result>        </action>    </package></struts>

Applicationcontext. 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-2.0.xsd    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">    <bean        class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />    <bean id="personService" class="quickstart.service.PersonServiceImpl" />    <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="showSql" value="true" />            </bean>        </property>    </bean>    <bean id="dataSource"        class="org.springframework.jdbc.datasource.DriverManagerDataSource">        <property name="driverClassName" value="com.mysql.jdbc.Driver" />        <property name="url" value="jdbc:mysql://localhost/quickstart" />        <property name="username" value="root" />        <property name="password" value="qwe123" />    </bean>    <bean id="transactionManager"        class="org.springframework.orm.jpa.JpaTransactionManager">        <property name="entityManagerFactory" ref="entityManagerFactory" />    </bean>    <tx:annotation-driven transaction-manager="transactionManager" />    <bean id="personAction" scope="prototype"        class="quickstart.action.PersonAction">        <constructor-arg ref="personService" />    </bean></beans>

Web. xml

<?xml version="1.0" encoding="UTF-8"?><web-app id="person" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">    <display-name>person</display-name>    <filter>        <filter-name>struts2</filter-name>        <filter-class>            org.apache.struts2.dispatcher.FilterDispatcher        </filter-class>    </filter>    <filter-mapping>        <filter-name>struts2</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <welcome-file-list>        <welcome-file>index.jsp</welcome-file>    </welcome-file-list>    <listener>        <listener-class>            org.springframework.web.context.ContextLoaderListener        </listener-class>    </listener></web-app>

5. Page code

The struts Ajax used here is not very easy to use. It is better to use easyui and jquery in combination with the JSON plug-in of struts.

Index. jsp

<%@ taglib prefix="s" uri="/struts-tags"%><%@ taglib uri="/struts-dojo-tags" prefix="sx" %>
List. jsp

<%@ taglib prefix="s" uri="/struts-tags"%><%@ taglib uri="/struts-dojo-tags" prefix="sx" %><p>Persons</p><s:if test="persons.size > 0"><table><s:iterator value="persons"><tr id="row_<s:property value="id"/>"><td><s:property value="firstName" /></td><td><s:property value="lastName" /></td><td><s:url id="removeUrl" action="remove"><s:param name="id" value="id" /></s:url><sx:a href="%{removeUrl}" targets="persons">Remove</sx:a><sx:a id="a_%{id}"  notifyTopics="/edit">Edit</sx:a></td></tr></s:iterator></table></s:if>

The final result is as follows:

 
Code package:
Http://download.csdn.net/detail/magic_wz/3999729 has been ready for a variety of packages, you can directly run eclipse