Question

我当前正在建立一个到数据库的连接池。我正在使用glassfish4，但出现此错误：

javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
    at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:313)
    at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:350)
    at javax.naming.InitialContext.lookup(InitialContext.java:417)
    at conexao.ConexaoBD.<init>(ConexaoBD.java:131)
    at unioeste.geral.endereco.manager.UCManterEndereco.obterEnderecoPorCep(UCManterEndereco.java:70)
    at unioeste.geral.endereco.manager.UCManterEndereco.cadastrarEnderecoDados(UCManterEndereco.java:141)
    at testeContrato.Teste.main(Teste.java:24)

java.lang.NullPointerException
    at unioeste.geral.endereco.dao.DaoEndereco.obterEnderecoPorCep(DaoEndereco.java:278)
    at unioeste.geral.endereco.col.ColEndereco.obterEnderecoPorCep(ColEndereco.java:88)
    at unioeste.geral.endereco.manager.UCManterEndereco.obterEnderecoPorCep(UCManterEndereco.java:71)
    at unioeste.geral.endereco.manager.UCManterEndereco.cadastrarEnderecoDados(UCManterEndereco.java:141)
    at testeContrato.Teste.main(Teste.java:24)

我已经为glassfish进行了配置，连接数据库的代码如下：

  javax.naming.InitialContext ctx;
try {
    ctx = new javax.naming.InitialContext();
    javax.sql.DataSource ds = (javax.sql.DataSource)ctx.lookup("jdbc/ALO");
    this.connection = ds.getConnection();

} catch (NamingException ex) {
    System.out.println("deu erro");
    Logger.getLogger(ConexaoBD.class.getName()).log(Level.SEVERE, null, ex);
}
catch (SQLException ex) {
    System.out.println("deu erro");
        Logger.getLogger(ConexaoBD.class.getName()).log(Level.SEVERE, null, ex);
}

}

我不使用ejb，只是一个类测试，它调用了我的用例UCManterEndereco。

javax.naming.Exception：Glassfish出现问题，需要在环境或系统属性中指定类名吗？

0 个答案: