Spring GWT集成
我正在使用GWT和Spring集成为控制台编写代码。我学习了GWT教程，并阅读了一些关于如何使用SpringQithGWT的论坛 我的RPC调用正在返回null，我似乎不明白为什么。由于英语不是我的母语，而且我对这方面还很陌生，所以我将把我的代码放在这里，看看是否有人能帮我 服务：Spring GWT集成,spring,gwt,servlets,service,rpc,Spring,Gwt,Servlets,Service,Rpc,我正在使用GWT和Spring集成为控制台编写代码。我学习了GWT教程，并阅读了一些关于如何使用SpringQithGWT的论坛 我的RPC调用正在返回null，我似乎不明白为什么。由于英语不是我的母语，而且我对这方面还很陌生，所以我将把我的代码放在这里，看看是否有人能帮我 服务： @RemoteServiceRelativePath("GestionUserService") public interface GestionUserService extends RemoteService {
@RemoteServiceRelativePath("GestionUserService")
public interface GestionUserService extends RemoteService {
Collection<Usuario> dameTablaUsuarios(String entidad);
}
public interface GestionUserServiceAsync {
void dameTablaUsuarios(String entidad,AsyncCallback<Collection<Usuario>> callback);
}
<?xml version="1.0" encoding="UTF-8"?>
<module rename-to='userConsole'>
<!-- Inherit the core Web Toolkit stuff. -->
<inherits name='com.google.gwt.user.User' />
<!-- Compilar solamente para Firefox -->
<!--<set-property name="user.agent" value="gecko1_8"></set-property> -->
<inherits name='com.google.gwt.user.theme.standard.Standard' />
<inherits name="com.google.gwt.i18n.I18N" />
<!-- Specify the app entry point class. -->
<entry-point class='com.santander.bam.comun.userconsole.client.GestionUsers' />
<!-- English language, independent of country -->
<extend-property name="locale" values="es_ES" />
<extend-property name="locale" values="en_US" />
<extend-property name="locale" values="de_DE" />
<!-- Specify the application specific style sheet. -->
<stylesheet src='UserConsole.css' />
<!-- Specify the paths for translatable code -->
<source path='client' />
<source path='client/services' />
<source path='db/bean' />
</module>
<beans>
<!-- Activates scanning of @Autowired -->
<context:annotation-config />
<context:component-scan base-package="com.santander.bam.comun.userconsole" />
<!-- FIN Agregado de la consola gwt-spring -->
<import resource="config.xml" />
<util:constant id="VARCHAR" static-field="java.sql.Types.VARCHAR" />
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="myDataSource"/>
</bean>
<bean id="GestionUserService" class="com.santander.bam.comun.userconsole.server.GestionUsersConsultImpl"></bean>
<bean id="utilDB" class="com.santander.bam.comun.userconsole.db.UserConsoleDBUtil">
<property name="dao" ref="UserConsoleDAO" />
<property name="transactionManager" ref="transactionManager"/>
</bean>
</beans>
<beans >
<bean id="UserConsoleDAO" class="com.santander.bam.comun.userconsole.db.UserConsoleDAO">
<property name="dataSource" ref="myDataSource" />
<!-- Definicion de consultas -->
<property name="sqlUsuarios"
value=" SELECT DISTINCT (IDUSER) IDUser,
NOMBRE Nombre,
IDPerfil IDPerfil,
FECHAALTA FechaAlta,
FECHABAM FechaBAM,
FECHACON FechaConsola
FROM
A_APAMA.USERS
WHERE
EMPRESA=?" />
<property name="sqlUsuarios2"
value=" SELECT DISTINCT (IDUSER) IDUser
FROM
A_APAMA.USERS
WHERE
EMPRESA=?" />
</bean>
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="com.ibm.db2.jcc.DB2Driver" />
<property name="url"
value="jdbc:db2://udisapma.isban.dev.corp:60090/udisapma" />
<property name="username" value="a_apama" />
<property name="password" value="********" />
</bean>
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="myDataSource" />
</bean>
</beans>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<!-- Loads and makes available the context defined in springconfig-service.xml -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>springGwtRemoteServiceServlet</servlet-name>
<servlet-class>org.spring4gwt.server.SpringGwtRemoteServiceServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>gestionUsersConsultImpl</servlet-name>
<servlet-class>com.santander.bam.comun.userconsole.server.GestionUsersConsultImpl</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>springGwtRemoteServiceServlet</servlet-name>
<url-pattern>/springGwtServices/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>gestionUsersConsultImpl</servlet-name>
<url-pattern>/userConsole/GestionUserService</url-pattern>
</servlet-mapping>
<!-- Default page to serve -->
<welcome-file-list>
<welcome-file>GestionUsers.html</welcome-file>
</welcome-file-list>
<!-- Paginas de error -->
<error-page>
<error-code>401</error-code>
<location>/accessDeny.html</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/serverError.html</location>
</error-page>
</web-app>
AsyncCallback<Collection<Usuario>> getUserID2 = new AsyncCallback<Collection<Usuario>>() {
// Failure: muestra error
public void onFailure(Throwable caught) {
whatever;
}
// Succes: obtener usuario
public void onSuccess(Collection<Usuario> Users) {
Whatever;
}
};
gestionUservc.dameTablaUsuarios("3293", getUserID2);
行logger.infoUtilDB+utilDB.toString；导致nullpointer异常。utilDB为null。请检查。感谢您的快速回复。我添加该行是为了确保我的DAO为null，如果我删除该行，我仍然会得到相同的错误，因此我认为我的utilDB对象在该点为null，但我不明白原因。如果我可以，但我似乎无法让调试模式工作，也许我正在做一些事情，但我在调试模式下运行应用程序，在我要进行异步调用时有一个断点，但它似乎没有开始调试，这是我在控制台上得到的：监听地址为8000的传输dt_套接字，所以它在那里等待我做一些事情g、 但我不知道是什么。好的，所以我终于设法让它工作起来了。这是我的解决方案：springGwtRemoteServiceServlet用户控制台/springGwtServices/*@RemoteServiceRelativePath springGwtServices/GestionUserService非常感谢大家花时间帮助我，很抱歉缺乏知识。这也帮助我找到了答案：干杯：这对你自己找到解决方案很好，很抱歉由于时间限制没有进一步推动你。
AsyncCallback<Collection<Usuario>> getUserID2 = new AsyncCallback<Collection<Usuario>>() {
// Failure: muestra error
public void onFailure(Throwable caught) {
whatever;
}
// Succes: obtener usuario
public void onSuccess(Collection<Usuario> Users) {
Whatever;
}
};
gestionUservc.dameTablaUsuarios("3293", getUserID2);