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正如我在 PrimeFaces 展示中所读到的,我的 autoComplete 需要一个转换器才能工作,所以我做了如下操作:

<p:autoComplete id="ListaInst"
    emptyMessage="Nenhuma instituição encontrada."
    value="#{InstituicaoController.inst1}"
    completeMethod="#{InstituicaoController.getInstituicoesLike}"
    var="i"
    itemLabel="#{i.inst_nome}"
    itemValue="#{i}"
    converter="instituicaoConverter"
    required="true"
    style="width: 200px;font-family: monospace; font-size: 14px; margin-top: 4px;" />

托管bean方法:

public Collection<Instituicao> getInstituicoesLike(String searchKeyword) {
    InstituicaoDao dao = new InstituicaoDao();
    Collection<Instituicao> instituicoes = dao.getInstituicoesLike(searchKeyword);
    return instituicoes;
}

DAO方法:

public Collection<Instituicao> getInstituicoesLike(String searchKeyword) {
    Session ss = HibernateUtil.getSessionFactory().getCurrentSession();
    try {
        ss.beginTransaction();
        List instituicoes = ss.createCriteria(Instituicao.class).add(Restrictions.like("inst_nome", searchKeyword)).list();
        ss.beginTransaction().commit();
        ss.close();
        ss.clear();
        return instituicoes;
    } catch(HibernateException e) {
        ss.getTransaction().rollback();
        ss.close();
        ss.clear();
    }
    return null;
}

我知道使用 JTA、JPA 2.1、JSF 2.2、EJB 3.1 和 Hibernate 4.3.4 会更好(并且使用它们可以完美地工作),但我不知道在我正在处理的项目中是否可以接受。心胸狭隘的开发人员不想“重新学习所有内容”并认为类似代码this.manager.persist(entity)比上面的样板代码更糟糕。

PS:转换器代码:

package br.com.solidaria.converters;

import br.com.solidaria.dao.InstituicaoDao;
import br.com.solidaria.model.Instituicao;

import javax.faces.component.*;
import javax.faces.context.*;
import javax.faces.convert.*;

/**
 *
 * @author Rodrigo Sieja Bertin
 */
@FacesConverter(forClass = Instituicao.class, value = "instituicaoConverter")
public class InstituicaoConverter implements Converter {

    @Override
    public Object getAsObject(FacesContext context, UIComponent component, String value) {
        InstituicaoDao dao = new InstituicaoDao();
        Instituicao i = InstituicaoDao.getById(Integer.parseInt(value));
        return i;
    }

    @Override
    public String getAsString(FacesContext context, UIComponent component, Object value) {
    Instituicao i = (Instituicao) value;
        return String.valueOf(i.getId());
    }
}
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1 回答 1

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感谢 Xtreme Biker 评论,更改ss.beginTransaction().commit()ss.getTransaction().commit()TransactionException消失了。

改为摆脱。getCurrentSession()_openSession()SessionException

最后,将查询行改为List instituicoes = ss.createCriteria(Instituicao.class).add(Restrictions.like("inst_nome", searchKeyword, MatchMode.START).ignoreCase()).list();,问题就解决了。

于 2014-03-22T21:22:56.173 回答