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Spring配置文件:
<bean id="MoldUsermDAO" class="com.sb.mmg.db.MoldUsermDAO">
<property name="hibernateTemplate">
<ref bean="hibernateTemplate" />
</property>
</bean>
<bean name="/login" class="com.sb.mmg.ui.action.LoginAction"
abstract="false" singleton="true" lazy-init="default"
autowire="default" dependency-check="default">
<property name="userdao">
<ref local="MoldUsermDAO" />
</property>
</bean>
LoginAction中的代码:
private MoldUsermDAO userdao;
public MoldUsermDAO getUserdao() {
return userdao;
}
public void setUserdao(MoldUsermDAO userdao) {
this.userdao = userdao;
}
List mylist = userdao.QueryObject(username, password);
java.lang.NullPointerException
at com.sb.mmg.ui.action.BaseAction.execute(BaseAction.java:105)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
<bean name="/login" class="com.sb.mmg.ui.action.LoginAction"
abstract="false" singleton="true" lazy-init="default"
autowire="default" dependency-check="default">
<property name="userdao">
<ref local="MoldUsermDAO" />
</property>
</bean>
<bean name="/login" class="com.sb.mmg.ui.action.LoginAction" singleton="false" autowire="byName">
<property name="userdao">
<ref local="MoldUsermDAO" />
</property>
</bean>
姓名 | <input id="user" name="user" type="text" /></td> |
密码 | <input id="psw" name="psw" type="text" /></td> |
<input type="submit" value="提交"/><input type="button" value="返回" /> |