service注入空指针，求找错！该怎么处理

service注入空指针，求找错！！！
这是action:

Java code

package com.estar.quality.web;import java.util.HashMap;import java.util.Map;import org.apache.struts2.interceptor.RequestAware;import org.apache.struts2.interceptor.SessionAware;import org.jfree.chart.JFreeChart;import com.estar.quality.service.IPersonBaseChartService;import com.opensymphony.xwork2.ActionSupport;public class PersonBaseChartAction extends ActionSupport implements RequestAware,        SessionAware {    private static final long serialVersionUID = 9183707250741213783L;    private Map<String, Object> request = new HashMap<String, Object>();    private Map<String, Object> session = new HashMap<String, Object>();    private IPersonBaseChartService personBaseChartService;    private JFreeChart chart;                //进入列表    public String getManHistogramList(){                return "ManHistogramList";    }        //柱状图    public String getManHistogram(){        System.out.println("xxxxxxxx");        System.out.println(personBaseChartService==null);        try {                        this.chart = personBaseChartService.getManHistogram();        } catch (Exception e) {            e.printStackTrace();        }        System.out.println("xxxxxxxx");        return "jFreeChart";    }        //饼状图    public String getManPicChart(){                return null;    }        //各公司 男女比例    public String getManTable(){                        return null;    }                public Map<String, Object> getRequest() {        return request;    }    public void setRequest(Map<String, Object> request) {        this.request = request;    }    public Map<String, Object> getSession() {        return session;    }    public void setSession(Map<String, Object> session) {        this.session = session;    }    public JFreeChart getChart() {        return chart;    }    public void setChart(JFreeChart chart) {        this.chart = chart;    }    public IPersonBaseChartService getPersonBaseChartService() {        return personBaseChartService;    }    public void setPersonBaseChartService(            IPersonBaseChartService personBaseChartService) {        this.personBaseChartService = personBaseChartService;    }}

下面是报错信息:

Java code

xxxxxxxxtruejava.lang.NullPointerException    at com.estar.quality.web.PersonBaseChartAction.getManHistogram(PersonBaseChartAction.java:36)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)    at java.lang.reflect.Method.invoke(Method.java:597)    at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:440)    at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:279)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)    at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:163)    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:249)    at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:148)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:93)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:128)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:104)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)    at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:148)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:128)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)    at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)    at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:468)    at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)    at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:76)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)    at java.lang.Thread.run(Thread.java:619)xxxxxxxx 
 

[解决办法]
spring 

配置文件
[解决办法]
personBaseChartService 本来就没有初始化，
你的public void setPersonBaseChartService方法也没有用户来调用
[解决办法]
<bean id="personbaseChartAction" class="com.estar.quality.web.PersonBaseChartAction" scope="prototype">
<property name="personBaseChartService" ref="personbaseChartService"></property>
</bean>


你的Struts 配置的action是不是personbaseChartAction？ 有没有配置错误？

[解决办法]

HTML code

<property name="personBaseChartDao" ref="personbaseChartDao" />
[解决办法]
先确定一下你的applicationContext.xml的各个文件的引入是正确的
[解决办法]
有一段日子不见三大框架了。。
[解决办法]
action中的getService方法去了试试只留set方法
[解决办法]
private IPersonBaseChartDao personBaseChartDao;

还有个set方法，service里面是不是这样的？

这个personBaseChartDao是大写的么 

 

查看更多 下一篇