Struts 2 Json结果休眠LazyInitialization-如何在休眠会话中反序列化

Struts 2 Json结果休眠LazyInitialization-如何在休眠会话中反序列化

好的，最后我解决了将通用DAO注入（带有会话和事务）添加到genericAction的问题。这适用于带有惰性hibernatebean的JSONResults和jsp。

感谢您对“ bmorris591”和“ Roman C”的贡献（我什至不需要，甚至不需要这些插件）。

我留下我的例子，希望我不要忘记任何事情…

拦截器配置（struts.xml片段）：

<package name="lmp" extends="struts-default,json-default">    <interceptors>        <interceptor name="login" />        <interceptor name="hibernateSessionTransInjector" />        <interceptor-stack name="loggingStack"> <interceptor-ref name="login" /> <interceptor-ref name="defaultStack" /> <interceptor-ref name="hibernateSessionTransInjector"/>        </interceptor-stack>    </interceptors>    <default-interceptor-ref name="loggingStack"/>    <global-results>        <result name="login" type="redirectAction">login</result>    </global-results></package><package name="myAction" extends="lmp">    <action name="myAction" >        <result name="json" type="json"> <param name="ignoreHierarchy">false</param>        </result>        <result name="*">/jsp/myAction.jsp</result>    </action></package>

拦截器实现：

package util;import org.apache.log4j.Logger;import org.hibernate.Session;import org.hibernate.SessionFactory;import util.hibernate.HibernateUtil;import com.lm.action.ActionsConstants;import com.lm.action.user.Constants;import com.lm.dao.DAO;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.Interceptor;public class HibernateSessionTransInjectorInterceptor implements Interceptor, Constants, ActionsConstants {    private static final long serialVersionUID = -8734958511612355789L;    private static SessionFactory sessionFactory = HibernateUtil.getSessionFactory();    private transient Logger log = Logger.getLogger(HibernateSessionTransInjectorInterceptor.class);    @Override    public void destroy() {    }    @Override    public void init() {    }    @Override    public String intercept(final ActionInvocation invocation) throws Exception {        String res=null;        DAO dao=null;        try { Session s=sessionFactory.openSession(); dao = new DAO(s); dao.beginTransaction(); **invocation.getStack().setValue("dao", dao, true);** res=invocation.invoke(); boolean rollback=(Boolean)invocation.getStack().findValue("rollbackTransaction", Boolean.class); if (rollback)     dao.rollBackTransaction(); if (!dao.getT().wasRolledBack())     dao.commitTransaction();        } catch (Throwable t2) { log.error(t2,t2); if (dao!=null) try {     dao.rollBackTransaction(); } catch (Throwable t3) {     log.error(t3,t3); }        } finally { if (dao!=null) try {     dao.finallyClose(); } catch (Throwable t) {     log.error(t,t); }        }        return res;    }}

UserDAO示例：

public class UserDAO extends DAO {[...]    public UserDAO(Session s) {        super(s);    }[...]}

GenericDAO示例：

public class DAO {    protected static final transient Logger log = Logger.getLogger(DAO.class);    public static SessionFactory sessionFactory = HibernateUtil.getSessionFactory();    public Session s = null;    public Transaction t = null;    public DAO(Session s) {        this.s=s;    }    public void beginTransaction(Transaction t) {        this.t=t;    }    private int exceptionErr=0;    public void beginTransaction() {        try { t=s.beginTransaction();        } catch (Throwable t) { log.error(t,t);        }    }    public void rollBackTransaction() {        if (t!=null && t.isActive()) t.rollback();    }    public void commitTransaction() {        if (t!=null && t.isActive()) t.commit();    }    public void finallyClose() {        if (t!=null && t.isActive())  t.rollback();        if (s!=null && s.isOpen()) s.close();    }    public Session getS() {        return s;    }    public void setS(Session s) {        this.s = s;    }    public Transaction getT() {        return t;    }    public void setT(Transaction t) {        this.t = t;    }}

一般动作：

public class GenericAction extends ActionSupport  {    private DAO dao=null;  //Interceptor injects here    public GenericAction() {    }...    @JSON(deserialize=false, serialize=false)    public DAO getDao() {        return dao;    }    @JSON(deserialize=false, serialize=false)    public void setDao(DAO dao) {        this.dao = dao;    }}

MyAction：

public class MyAction extends GenericAction {    public MyAction() {    }    @Override    public String execute() throws Exception {        super.execute();        UserDAO userDAO=new UserDAO(getDao().getS());        OtherDAO otherDAO=new OtherDAO(getDao().getS());        userDAO.loadUsers(...); return SUCCESS;    }}