struts2 crud

1.Caused by: com.opensymphony.xwork2.inject.ContainerImpl$MissingDependencyException: No mapping found for dependency [type=java.lang.String, name='actionPackages'] in public void org.apache.struts2.config.ClasspathPackageProvider.setActionPackages(java.lang.String).??

 

需要配置<filter>  
  <filter-name>struts2</filter-name>  
  <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> 
  <init-param>
   <param-name>actionPackages</param-name>
         <param-value>org.apache.struts2.showcase.action</param-value> //action所在的包
  </init-param>
</filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
   
     <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>       //和spring集成

 

2.applicationContext.xml:

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans default-autowire="byName">    //不用再写property

    <bean id="storage" class="org.apache.struts2.showcase.application.MemoryStorage" singleton="true"/>

    <bean id="testDataProvider" class="org.apache.struts2.showcase.application.TestDataProvider" singleton="true" lazy-init="false"/>

    <bean id="skillDao" class="org.apache.struts2.showcase.dao.SkillDao"/>
    <bean id="employeeDao" class="org.apache.struts2.showcase.dao.EmployeeDao"/>

</beans>

 

3.action:

 

public class SkillAction extends AbstractCRUDAction implements Preparable {

    private static final Logger log = Logger.getLogger(SkillAction.class);

    private String skillName;                   和<s:param name="skillName" value="name"/>有关
    protected SkillDao skillDao;
    private Skill currentSkill;               

                               // <result type="redirect">edit.action?skillName=${currentSkill.name}</result>

                                    <s:textfield label="%{getText('skill.name')}" name="currentSkill.name"/>

    public String getSkillName() {
        return skillName;
    }

    public void setSkillName(String skillName) {
        this.skillName = skillName;
    }

    protected Dao getDao() {
     System.out.println("skillDAO: "+skillDao);
        return skillDao;
    }

    public void setSkillDao(SkillDao skillDao) {
        if (log.isDebugEnabled()) {
            log.debug("SkillAction - [setSkillDao]: skillDao injected.");
        }
        this.skillDao = skillDao;
    }

    public Skill getCurrentSkill() {
        return currentSkill;
    }

    public void setCurrentSkill(Skill currentSkill) {
        this.currentSkill = currentSkill;
    }

    /**
     * This method is called to allow the action to prepare itself.
     *
     * @throws Exception thrown if a system level exception occurs.
     */
    public void prepare() throws Exception {
        Skill preFetched = (Skill) fetch(getSkillName(), getCurrentSkill());
        if (preFetched != null) {
            setCurrentSkill(preFetched);
        }
    }

    public String save() throws Exception {
        if (getCurrentSkill() != null) {
            setSkillName((String) skillDao.merge(getCurrentSkill()));
        }
        return SUCCESS;
    }

}

 

4.interceptor:

 

5.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>

 

 <package name="default" extends="struts-default">
        <interceptors>
            <interceptor-stack name="crudStack">
              <interceptor-ref name="checkbox" />
                <interceptor-ref name="params" />
        <interceptor-ref name="staticParams" />
                <interceptor-ref name="defaultStack" />
            </interceptor-stack>
        </interceptors>

</package>
    <package name="skill" extends="default" namespace="/skill">
        <default-interceptor-ref name="crudStack"/>

        <action name="list" class="org.apache.struts2.showcase.action.SkillAction" method="list">
            <result>/empmanager/listSkills.jsp</result>
            <interceptor-ref name="basicStack"/>
        </action>
        <action name="edit" class="org.apache.struts2.showcase.action.SkillAction">
            <result>/empmanager/editSkill.jsp</result>
            <interceptor-ref name="params" />
            <interceptor-ref name="basicStack"/>
        </action>
        <action name="save" class="org.apache.struts2.showcase.action.SkillAction" method="save">
            <result name="input">/empmanager/editSkill.jsp</result>
            <result type="redirect">edit.action?skillName=${currentSkill.name}</result>
        </action>
        <action name="delete" class="org.apache.struts2.showcase.action.SkillAction" method="delete">
            <result name="error">/empmanager/editSkill.jsp</result>
            <result type="redirect">edit.action?skillName=${currentSkill.name}</result>
        </action>
    </package>
</struts>

 

6.page:

<s:iterator value="availableItems">     //list
        <tr>
            <td><a href="<s:url action="edit"><s:param name="skillName" value="name"/></s:url>"><s:property value="name"/></a></td>
            <td><s:property value="description"/></td>
        </tr>
    </s:iterator>

 

7.Preparable:

import com.opensymphony.xwork2.Preparable;

public void prepare() throws Exception {
  System.out.println("preparabe():............");
  Word w=null;
  if(id!=null){
   w=daoService.get(id);
  }
  if(w!=null){
   this.setCurrentWord(w);
  }
 }

每调用一次action,都会在执行execute()方法前调用preparabe();

8.new 和 edit用一个页面:

<s:if test="currentWord!=null">
    <s:set name="submitType" value="'update'"/>
    <s:text id="title" name="item.edit"><s:param><s:text name="word"/></s:param></s:text>
</s:if>
<s:else>
    <s:set name="submitType" value="'create'"/>
    <s:text var="title" name="item.create"><s:param><s:text name="word"/></s:param></s:text>
</s:else>

 

s:form action="save">
    <s:textfield label="%{getText('word.id.label')}" name="currentWord.id"/>
    <s:textfield label="%{getText('word.content.label')}" name="currentWord.content"/>
    <%--s:submit name="%{#submitType}" value="%{getText('save')}" /--%>
    <s:submit value="%{getText('save')}" />
</s:form>

评论

1 楼 yisshengyouni 2012-08-04  

谢谢分享，刚遇到的问题解决了