[求助] action调用serivce，service调用dao报空指针异常！！！

[sx513240563]

报错信息

2017-11-18 14:46:11,552 [http-nio-8080-exec-8] ERROR org.apache.struts2.dispatcher.DefaultDispatcherErrorHandler - Exception occurred during processing request: null
java.lang.NumberFormatException: null
	at java.lang.Integer.parseInt(Integer.java:542)
	at java.lang.Integer.valueOf(Integer.java:766)
	at cn.sx.action.PaymentAction.paymentadd(PaymentAction.java:86)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:870)
	at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1293)
	at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68)
	at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
	at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
	at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
	at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)
	at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
	at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:564)
	at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)
	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
	at java.lang.Thread.run(Thread.java:745)

action类：

public class PaymentAction extends ActionSupport{
	
	private PaymentService paymentService;
	
	public void setPaymentService(PaymentService paymentService) {
		this.paymentService = paymentService;
	}
	
	private HttpServletRequest request = ServletActionContext.getRequest();

        /**
	 * 缴费信息添加
	 */
	public String paymentadd(){
		String proid = request.getParameter("property");
		String type = request.getParameter("type");
		String paycycle = request.getParameter("paycycle");
		String cost = request.getParameter("cost");
		String remark = request.getParameter("remark");
		
		Property pro = paymentService.findprobean(Integer.valueOf(proid));
		
		
		Payment pay = new Payment();
		
		pay.setProperty(pro);
		pay.setType(type);
		pay.setPaycycle(paycycle);
		pay.setCost(cost);
		pay.setRemark(remark);
		pay.setPaymentlock(0);
		pay.setCreatetime(new Date());
		pay.setPaytime(new Date());
		
		paymentService.insertpayment(pay);
		
		return "repaymentlist";
	}

service类：

@Transactional
public class PaymentService {
	
	private PaymentDao paymentDao;

	public void setPaymentDao(PaymentDao paymentDao) {
		this.paymentDao = paymentDao;
	}
         public Property findprobean(Integer proid) {
		return paymentDao.findprobean(proid);
	}

dao类：

public interface PaymentDao {

	Property findprobean(Integer proid);}

dao实现类：

public class PaymentDaoImpl extends HibernateDaoSupport implements PaymentDao {
	public void insertpayment(Payment pay) {
		this.getHibernateTemplate().save(pay);
	}

	public Property findprobean(Integer proid) {	
		List<Property> list = (List<Property>) this.getHibernateTemplate().find("from Property where proid  = ?", proid);
		if (list!=null && list.size()!=0) {
			return list.get(0);
		}
		return null;
	}

spring：

<bean id="paymentAction" class="cn.sx.action.PaymentAction" scope="prototype">
		<property name="paymentService" ref="paymentService"></property>
	</bean>

	<bean id="paymentService" class="cn.sx.service.PaymentService" scope="prototype">
		<property name="paymentDao" ref="paymentDaoImpl"></property>
	</bean>

	<bean id="paymentDaoImpl" class="cn.sx.dao.PaymentDaoImpl" scope="prototype">
		<property name="sessionFactory" ref="sessionFactory"></property>
	</bean>

我用断点找了，结果是显示
求助大神！！

[李德胜1995]

java.lang.NumberFormatException: null at java.lang.Integer.parseInt(Integer.java:542) at java.lang.Integer.valueOf(Integer.java:766) at cn.sx.action.PaymentAction.paymentadd(PaymentAction.java:86) PaymentAction的86行,打印proid是否为null???

[sx513240563]

断点显示的是paymentDao为空，proid是有值的

[Sunyiban]

java.lang.NumberFormatException: null at java.lang.Integer.parseInt(Integer.java:542) 这该是参数问题吧

[guan_tu]

应该是proid为null,报错的是Integer.valueOf()这个方法,不知道楼主是怎么调试出dao为null的

[dengdengdeng0908]

at cn.sx.action.PaymentAction.paymentadd(PaymentAction.java:86) 这行代码是啥

[遥远的想念]

java.lang.NumberFormatException: null at java.lang.Integer.parseInt(Integer.java:542) at java.lang.Integer.valueOf(Integer.java:766) at cn.sx.action.PaymentAction.paymentadd(PaymentAction.java:86) 这里报错信息比较明显了，PaymentAction这个类的86行，前面报转化失败，那应该传了个错误的类型或者null过来了

[墨笙弘一]

java.lang.NumberFormatException: null 看看你那个action 是不是有值

[墨笙弘一]

List<Property> list = (List<Property>) this.getHibernateTemplate().find("from Property where proid = ?", proid); if (list!=null && list.size()!=0) { return list.get(0); } return null; 看看你这个list是不是为null 如果为null 那么你返回的就是null 当然最后null不能转为数字就会报哪个错啊

[一个稳健的程序员_]

在dao的头上有@service 没有 或者错了都走不进去