(ssh2) java.lang.NullPointerException 空指针异常

[bueraimili]

java.lang.NullPointerException
com.wy.action.LoginAction.login(LoginAction.java:33)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:601)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:441)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
jsp页面

用户登录
<s:form action="login.action"  method="post" validate="true">
<s:textfield name="loginInfor.stuId" label="学号" size="20"></s:textfield>
<s:password name="loginInfor.password" label="密码" size="20"></s:password>
<s:submit value="进入系统"></s:submit>

sturts配置

<action name="login" class="com.wy.action.LoginAction" method="login">
           <result name="success">/login_success.jsp</result>
           <result name="error">/login.jsp</result>
           <result name="input">/login.jsp</result>
</action>

LoginAction

public class LoginAction extends ActionSupport {
	private static final long serialVersionUID = 1L;
	private LoginService loginService;
	private LoginInfor loginInfor;
	//private List<LoginInfor> user;
	public LoginService getLoginService() {
		return loginService;
	}
	public void setLoginService(LoginService loginService) {
		this.loginService = loginService;
	}
	public LoginInfor getLoginInfor() {
		return loginInfor;
	}
	public void setLoginInfor(LoginInfor loginInfor) {
		this.loginInfor = loginInfor;
	}
	
	@SuppressWarnings("unchecked")
	public String login() throws Exception {

		LoginInfor user=loginService.find(loginInfor.getStuId(),loginInfor.getPassword());
		if(user!=null){
		Map session=(Map)ActionContext.getContext().getSession();
		session.put("user", loginInfor);
		return SUCCESS;
	}else{
		return ERROR ;}

	}

LoginServiceImpl

public class LoginServiceImpl implements LoginService {

	private LoginDao loginDao;
	
	
	public LoginDao getLoginDao() {
		return loginDao;
	}
	public void setLoginDao(LoginDao loginDao) {
		this.loginDao = loginDao;
	}
	
	public LoginInfor find(String stuId, String password) {
		
		return loginDao.find(stuId, password);
	}
	public LoginInfor findbyname(String stuId){
		return loginDao.findbyname(stuId);
	}

LoginDaoImpl

import java.util.List;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import com.wy.model.LoginInfor;

public class LoginDaoImpl extends HibernateDaoSupport implements LoginDao {

	public LoginInfor find(String stuId, String password) {
		String[] str={stuId,password};
		List list=getHibernateTemplate().find("from LoginInfor u where u.stuId=? and u.password=?",str);
		if(list.size()>=1)
		return	(LoginInfor) list.get(0);
	
		return null;
	}

[艺匠之美]

loginService没有初始化吧？

[bueraimili]

引用 1 楼 u012006909 的回复:

loginService没有初始化吧？

这是我在网上下载的一个ssh2的管理系统出错的，对shh2了解不是很多，看了好多遍都不知道哪里有错。然后debug不会用，就先暂时这样，我忙着做毕业设计，谢谢亲的解答

[bueraimili]

引用 1 楼 u012006909 的回复:

loginService没有初始化吧？

loginService没有初始化？ 从网上下载的ssh2的管理系统，出这个错误。对ssh2了解不多，看着好像没错，我在忙着做毕业设计，谢谢亲的解答。

[「已注销」]

public void setLoginService在它头上加个@Resource试试

[S117]

你的依赖注入是怎么注入的，在你的代码中没看出来