我通过打桩，可以从页面获取到参数，但是在调用方法往方法里面传参的时候，报空指针异常。
if (id != null && id.length > 0) {
ApplicationContext context = new ClassPathXmlApplicationContext(
"applicationContext.xml");
IPurchase purchase = (IPurchase) context.getBean("purchaseProxy");
purchase.setSId(session.getAttribute("userId").toString());
//这里是可以获取到参数的
System.out.println(id);
purchase.insertById(id);
public boolean insertById(String[] id) {
boolean result=false;
ApplicationContext context = new ClassPathXmlApplicationContext(
"applicationContext.xml");
IDataConfig myData = (IDataConfig) context.getBean("dataConfigProxy");
myData.init();
try {
myData.openConnection();
myData.beginTransaction();
for(int i=0;i<id.length;i++){
myData.addBatch("delete from purchase where id ="+id[i]);
}
if(myData.commit()){
result=true;
}else{
result=false;
}
myData.endTransaction();
} catch (SQLException e) {
e.printStackTrace();
}finally{
myData.closeConnection();
}
return result;
java.lang.NullPointerException
at com.sun.proxy.$Proxy5.insertById(Unknown Source)
at com.genius.sales_Manage.purchase.action.InsertHCAction.handleRequest(InsertHCAction.java:63)
at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:563)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.genius.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:56)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
purchase.insertById(id); 你这里的null指针问题不一定是id影响的，也有可能purchase这个就是一个null，你在检查一下
很显然不是id的原因， 可能没有获取到 dataConfigProxy 这个bean， 建议把信息的报错信息贴出来（还有问题的描述代码乱飞， 建议也改与一下）
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
你这是在代码里面独立临时加载spring配置上下文，你还没真正理解spring运行流程。不信你可以打印content看看是不是同一个对象！