空指针针异常
0
悬赏园豆：5
[已解决问题]
解决于 2017-02-18 14:48
java.lang.NullPointerException
at com.bochy.Helloworld.deplomentProcessDefinition(Helloworld.java:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:292)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
问题补充：
public synchronized static void init() {
if (!isInitialized()) {
if(processEngines == null) {
// Create new map to store process-engines if current map is null
processEngines = new HashMap<String, ProcessEngine>();
}
ClassLoader classLoader = ReflectUtil.getClassLoader();
Enumeration<URL> resources = null;
try {
resources = classLoader.getResources("activiti.cfg.xml");
} catch (IOException e) {
throw new ActivitiIllegalArgumentException("problem retrieving activiti.cfg.xml resources on the classpath: "+System.getProperty("java.class.path"), e);
}
// Remove duplicated configuration URL's using set. Some classloaders may return identical URL's twice, causing duplicate startups
Set<URL> configUrls = new HashSet<URL>();
while (resources.hasMoreElements()) {
configUrls.add( resources.nextElement() );
}
for (Iterator<URL> iterator = configUrls.iterator(); iterator.hasNext();) {
URL resource = iterator.next();
log.info("Initializing process engine using configuration '{}'", resource.toString());
initProcessEnginFromResource(resource);
}
try {
resources = classLoader.getResources("activiti-context.xml");
} catch (IOException e) {
throw new ActivitiIllegalArgumentException("problem retrieving activiti-context.xml resources on the classpath: "+System.getProperty("java.class.path"), e);
}
while (resources.hasMoreElements()) {
URL resource = resources.nextElement();
log.info("Initializing process engine using Spring configuration '{}'", resource.toString());
initProcessEngineFromSpringResource(resource);
}
setInitialized(true);
} else {
log.info("Process engines already initialized");
}
}
最佳答案
0
at com.bochy.Helloworld.deplomentProcessDefinition(Helloworld.java:12)
收获园豆：5
package com.bochy;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.repository.Deployment;
import org.junit.Test;
public class Helloworld {
ProcessEngine processEngine=ProcessEngines.getDefaultProcessEngine();
@Test
public void deplomentProcessDefinition(){
Deployment deployment=processEngine.getRepositoryService()
.createDeployment()
.addClasspathResource("diagrams/helloWorld.bpmn")
.addClasspathResource("diagrams/helloWorld.png")
.deploy();
System.out.println(deployment.getId());
System.out.println(deployment.getName());
}
}
@liujieobk: 你右键方法，debug as ，junit test，看看processEngine是不是为null
