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저는이 문제에 대한 많은 답변을 통해 많은 스트레스를 받았으며 많은 사람들이 주석을 사용해야한다고 말하고 있습니다. 그러나 나는 그것이 문제가 아니라고 생각합니다. 구성에 오류가 있습니다. 콩이 내 배선되어있을 수 있습니다. 두 지점에서 오류가 발생합니다 1. userName 필드에서 Tab을 누를 때 - 웹 서비스를 실행하고 있으므로 및 2. 제출 버튼을 누르고 POST를 누릅니다. 는 userName 이미 필드 중 내가 탭은 데이터베이스를 확인할 때 내가 그래서 웹 서비스를 사용하고 그래서 존재하는 경우SpringMvc java.lang.NullPointerException - 구성입니다. 정확함
내가 볼 수있는 데이터베이스를 확인하려합니다. 또한 동일한 기능을 다시 호출 할 때 서버에 데이터를 게시 할 때이 동일한 유효성 검사를 수행하려고했습니다.
이 함수는 부울을 반환합니다. 문자열 userName의 매개 변수를 받아들이는 클래스 내의 함수입니다. 어쩌면 콩을 잘못 연결했을 수도 있습니다. 나는 공장 콩 만들고 applicationContext.xml의 새 인스턴스를 만들 경우 그것은 작동 :
FactoryBean.java을
package com.crimetrack.service;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public final class FactoryBean {
private static ClassPathXmlApplicationContext context;
private static ClassPathXmlApplicationContext getContext() {
if (context == null) {
context = new ClassPathXmlApplicationContext("applicationContext.xml");
}
return context;
}
public static OfficerRegistrationValidation getOfficerRegistrationValidation() {
return (OfficerRegistrationValidation) getContext().getBean("officerRegistrationValidation");
}
}
하고 내가 사용하는 경우
(FactoryBean.getOfficerRegistrationValidation().validateUserNameManager.DoesUserNameExist(officer.getUserName()) == true){
OfficerRegistrationValidation.java 작동하지만 사용할 수 없습니다. 내 응용 프로그램은 각 콩의 새 인스턴스를 applicationContext.xml에 만들고 내 응용 프로그램에 영향을 주므로 사용하십시오.
아래에 내 코드와 두 개의 오류 로그가 있습니다. 1. 사용자 이름 입력란에서 탭을 눌렀을 때 2. 제출 버튼을 통해 양식을 게시 할 때 2. 오류가 발생했습니다. OfficerRegistrationValidation.java
public class OfficerRegistrationValidation implements Validator{
private final Logger logger = Logger.getLogger(getClass());
ValidateUserNameManager validateUserNameManager;
public boolean supports(Class<?> clazz) {
return Officers.class.equals(clazz);
}
public void validate(Object target, Errors errors) {
Officers officer = (Officers) target;
if (officer.getUserName() == null){
errors.rejectValue("userName", "userName.required");
}else{
String userName = officer.getUserName();
logger.info("OfficerRegistrationValidation - UserName is not null so going to check if its valid for :" + userName);
try {
logger.info("OfficerRegistrationValidation - Just before try.....catch block...userName is :" + userName);
logger.info("OfficerRegistrationValidation - about to evaluate if (validateUserNameManager.DoesUserNameExist(officer.getUserName()) == true)");
//using a factory bean to instantiate the creation of the bean
//in some cases you want to use the existing bean and not instantiate
//if (FactoryBean.getOfficerRegistrationValidation().validateUserNameManager.DoesUserNameExist(officer.getUserName()) == true){
if (validateUserNameManager.DoesUserNameExist(officer.getUserName())== true){
errors.rejectValue("userName", "userName.exist");
}
} catch (Exception e) {
logger.info("OfficerRegistrationValidation - Error Occured When validating UserName");
logger.error("Message", e);
errors.rejectValue("userName", "userName.error");
}
}
if(officer.getPassword()== null){
errors.rejectValue("password", "password.required");
}
if(officer.getPassword2()== null){
errors.rejectValue("password2", "password2.required");
}
}
/**
* @return the validateUserNameManager
*/
public ValidateUserNameManager getValidateUserNameManager() {
logger.info("Getting - ValidateUserNameManager");
return validateUserNameManager;
}
/**
* @param validateUserNameManager the validateUserNameManager to set
*/
public void setValidateUserNameManager(
ValidateUserNameManager validateUserNameManager) {
logger.info("Setting - ValidateUserNameManager");
this.validateUserNameManager = validateUserNameManager;
}
}
ValidateUserNameManager.java
을
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js"></script>
<style>
<%@ include file="../css/forms.css" %>
</style>
<script type="text/javascript">
<%@ include file="../js/off_reg.js"%>
$(document).ready(function(){
$('#userName').blur(function(evt){
CheckAvailability();
});
});
function CheckAvailability(){
$.ajax({
type:'GET',
url:'validateUserName.htm',
data:{userName:$('#userName').val()},
dataType: 'json',
success:function(data) {
if (data == true){
alert("User Name Already Exists");
$("#userNameErr").text("User Name Already Exist");
}else if ($("#userName").val() == ""){
$("#userNameErr").text(" ");
}else if(data == false){
$("#userNameErr").text("User Name Valid");
}
}
});
}
</script>
<title>Officer Registration</title>
</head>
<body>
<form:form method="post" modelAttribute="officers" action="officer_registration.htm">
<ol>
<li><label>User Name</label>
<form:input path="userName"/><form:errors path="userName" id="errors"/><label id="userNameErr"></label></li>
<li><label>Password</label>
<form:password path="password"/><form:errors path="password" id="errors"/></li>
<li><label>Re-Enter Password</label>
<form:password path="password2"/><form:errors path="password2" id="errors"/></li>
<li><label>e-Mail Address</label>
<form:input path="emailAdd"/><form:errors path="emailAdd" id="errors"/></li>
<br/>
<li><input type="submit" name= "request" value="Register" />
<input type="submit" name= "request" value="Update" /></li>
</ol>
</form:form>
</body>
</html>
office_registration.jsp :이 내가 달성하기 위해 노력하고 무엇의 좋은 사진을 제공합니다 희망
public class ValidateUserNameManager implements ValidateUserNameIFace {
public ValidateUserNameManager(){}
private OfficersDAO officerDao;
private final Logger logger = Logger.getLogger(getClass());
public boolean DoesUserNameExist(String userName) throws Exception {
logger.info("Inside ValidateUserNameManager");
try{
logger.info("ValidateUserNameManager - UserName is : " + userName);
if(officerDao.OfficerExist(userName) == true){
logger.info("ValidateUserNameManager - UserName :" + userName + " does exist");
return true;
}else{
logger.info("ValidateUserNameManager - UserName :" + userName + " does NOT exist");
return false;
}
}catch(Exception e){
logger.error("Message", e);
logger.info("ValidateUserNameManager - UserName :" + userName + " EXCEPTION OCCURED " + e.toString());
return false;
}
}
/**
* @return the officerDao
*/
public OfficersDAO getOfficerDao() {
logger.info("ValidateUserNameManager - getting officerDAO");
return officerDao;
}
/**
* @param officerdao the officerDao to set
*/
public void setOfficerDao(OfficersDAO officerDao) {
logger.info("ValidateUserNameManager - setting officerDAO");
this.officerDao = officerDao;
}
}
OfficerRegistrationController.java
@Controller
public class OfficerRegistrationController {
private final Logger logger = Logger.getLogger(getClass());
private DivisionManager divisionManager;
private PositionManager positionManager;
private GenderManager genderManager;
private Officers officer = new Officers();
private ValidateUserNameManager validateUserNameManager;
Map<String, Object> myDivision = new HashMap<String, Object>();
Map<String, Object> myPosition = new HashMap<String, Object>();
Map<String, Object> myGender = new HashMap<String, Object>();
@InitBinder("officers")
protected void initBinder(WebDataBinder binder){
//removes white spaces
binder.registerCustomEditor(String.class, new StringTrimmerEditor(true));
//formats date
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
//By passing true this will convert empty strings to null
binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));
dateFormat.setLenient(false);
logger.info("Just before initBinder");
binder.setValidator(new OfficerRegistrationValidation());
}
@RequestMapping(value="officer_registration.htm", method = RequestMethod.GET)
public ModelAndView loadPage(HttpServletRequest request,
HttpServletResponse response,@ModelAttribute Officers officer, BindingResult result, ModelMap m, Model model) throws Exception {
try{
logger.debug("In Http method for OfficerRegistrationController");
myDivision.put("divisionList", this.divisionManager.getDivisions());
myPosition.put("positionList", this.positionManager.getPositionList());
myGender.put("genderList", this.genderManager.getGenderList());
model.addAttribute("division", myDivision);
model.addAttribute("position", myPosition);
model.addAttribute("gender", myGender);
return new ModelAndView("officer_registration");
}catch(Exception e){
request.setAttribute("error",e.getMessage());
return new ModelAndView("error_page");
}
}
@RequestMapping(value="officer_registration.htm", method=RequestMethod.POST)
public ModelAndView handleRequest(@Valid @ModelAttribute Officers officer, BindingResult result, ModelMap m, Model model)throws Exception{
if(result.hasErrors()){
model.addAttribute("division", myDivision);
model.addAttribute("position", myPosition);
model.addAttribute("gender", myGender);
return new ModelAndView("officer_registration");
}else{
return null;
}
}
@RequestMapping(value="validateUserName.htm", method=RequestMethod.GET)
public @ResponseBody String validateUserName(@RequestParam String userName)throws Exception{
String results = "false";
logger.info("Inside OfficerRegistrationController");
try{
logger.info("In try ..... catch for OfficerRegistrationController");
if (validateUserNameManager.DoesUserNameExist(userName)== true){
results = "true";
return results;
}
}catch(Exception e){
logger.debug("Error in validateUserName Controller " + e.toString());
return results;
}
return results;
}
public void setDivisionManager(DivisionManager divisionManager){
this.divisionManager = divisionManager;
}
public void setPositionManager(PositionManager positionManager){
this.positionManager = positionManager;
}
public void setGenderManager(GenderManager genderManager){
this.genderManager = genderManager;
}
/**
* @return the validateUserNameManager
*/
public ValidateUserNameManager getValidateUserNameManager() {
return validateUserNameManager;
}
/**
* @param validateUserNameManager the validateUserNameManager to set
*/
public void setValidateUserNameManager(
ValidateUserNameManager validateUserNameManager) {
this.validateUserNameManager = validateUserNameManager;
}
/**
* @return the officer
*/
public Officers getOfficer() {
return officer;
}
/**
* @param officer the officer to set
*/
public void setOfficer(Officers officer) {
this.officer = officer;
}
}
crimetrack-servlet.xml에
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"..............
<!-- __________________________________________________________________________________________________ -->
<!-- Supports annotations and allows the use of @Controller, @Required, @RequestMapping -->
<context:annotation-config/>
<context:component-scan base-package="com.crimetrack" />
<!-- __________________________________________________________________________________________________ -->
<!-- Forwards requests to the "/" resource to the "login" view -->
<mvc:view-controller path="/login" view-name="login"/>
<!-- Forwards requests to the "/" resource to the "officer_registration" view -->
<mvc:view-controller path="/officer_registration" view-name="officer_registration"/>
<!-- __________________________________________________________________________________________________ -->
<!-- <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/> -->
<!-- Is used to process method level annotations -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
<!-- __________________________________________________________________________________________________ -->
<!-- <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/> -->
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="messages"/>
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean name="/hello.htm" class="com.crimetrack.web.CountryListController">
<property name="countryManager" ref="countryManager"/>
</bean>
<bean name="/login.htm" class="com.crimetrack.web.AuthenticationController">
<property name="authenticationManager" ref="authenticationManager"/>
</bean>
<bean name="/officer_registration.htm" class="com.crimetrack.web.OfficerRegistrationController">
<property name="divisionManager" ref="divisionManager" />
<property name="positionManager" ref="positionManager" />
<property name="genderManager" ref="genderManager"/>
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean name="/validateUserName.htm" class="com.crimetrack.web.OfficerRegistrationController">
<property name="validateUserNameManager" ref="validateUserNameManager"/>
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
의 ApplicationContext.XML
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"...............
<!-- __________________________________________________________________________________________________ -->
<bean id="countryManager" class="com.crimetrack.service.CountryManager">
<property name="countryDao" ref="countryDao"/>
</bean>
<bean id="countryDao" class="com.crimetrack.jdbc.JdbcCountryDAO">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean id="authenticationManager" class="com.crimetrack.service.AuthenticationManager">
<property name="loginDao" ref="loginDao" />
</bean>
<bean id="loginDao" class="com.crimetrack.jdbc.JdbcLoginDAO">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean id="divisionManager" class="com.crimetrack.service.DivisionManager">
<property name="divisionDao" ref="divisionDao"/>
</bean>
<bean id="divisionDao" class="com.crimetrack.jdbc.JdbcDivisionDAO">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean id="positionManager" class="com.crimetrack.service.PositionManager">
<property name="positionDao" ref="positionDao"/>
</bean>
<bean id="positionDao" class="com.crimetrack.jdbc.JdbcPositionDAO">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean id="genderManager" class="com.crimetrack.service.GenderManager">
<property name="genderDao" ref="genderDao"/>
</bean>
<bean id="genderDao" class="com.crimetrack.jdbc.JdbcGenderDAO" >
<property name="dataSource" ref="dataSource" />
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean id="officerRegistrationValidation" class="com.crimetrack.service.OfficerRegistrationValidation">
<property name="validateUserNameManager" ref="validateUserNameManager"/>
</bean>
<bean id="validateUserNameManager" class="com.crimetrack.service.ValidateUserNameManager">
<property name="officerDao" ref="officerDao"/>
</bean>
<bean id="officerDao" class="com.crimetrack.jdbc.JdbcOfficersDAO" >
<property name="dataSource" ref="dataSource" />
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:jdbc.properties</value>
</list>
</property>
</bean>
<!-- __________________________________________________________________________________________________ -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
1. 오류 로그 때 탭 아웃 사용자 이름 필드를 양식 컨트롤러에 POST가
1882370 [http-8084-1] DEBUG org.springframework.web.bind.annotation.support.HandlerMethodInvoker - Invoking request handler method: public java.lang.String com.crimetrack.web.OfficerRegistrationController.validateUserName(java.lang.String) throws java.lang.Exception
1882370 [http-8084-1] INFO com.crimetrack.web.OfficerRegistrationController - Inside OfficerRegistrationController
1882370 [http-8084-1] INFO com.crimetrack.web.OfficerRegistrationController - In try ..... catch for OfficerRegistrationController
1882370 [http-8084-1] INFO com.crimetrack.service.ValidateUserNameManager - Inside ValidateUserNameManager
1882370 [http-8084-1] INFO com.crimetrack.service.ValidateUserNameManager - ValidateUserNameManager - UserName is : admin
1882371 [http-8084-1] ERROR com.crimetrack.service.ValidateUserNameManager - Message
java.lang.NullPointerException
at com.crimetrack.service.ValidateUserNameManager.DoesUserNameExist(ValidateUserNameManager.java:26)
at com.crimetrack.web.OfficerRegistrationController.validateUserName(OfficerRegistrationController.java:140)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
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:127)
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:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
1882371 [http-8084-1] INFO com.crimetrack.service.ValidateUserNameManager - ValidateUserNameManager - UserName :admin EXCEPTION OCCURED java.lang.NullPointerException
2.Error 로그 :
1135560 [http-8084-1] DEBUG org.springframework.beans.TypeConverterDelegate - Converting String to [class java.lang.String] using property editor [[email protected]83ad7]
1135560 [http-8084-1] INFO com.crimetrack.service.OfficerRegistrationValidation - OfficerRegistrationValidation - UserName is not null so going to check if its valid for :admin
1135560 [http-8084-1] INFO com.crimetrack.service.OfficerRegistrationValidation - OfficerRegistrationValidation - Just before try.....catch block...userName is :admin
1135560 [http-8084-1] INFO com.crimetrack.service.OfficerRegistrationValidation - OfficerRegistrationValidation - about to evaluate if (validateUserNameManager.DoesUserNameExist(officer.getUserName()) == true)
1135560 [http-8084-1] INFO com.crimetrack.service.OfficerRegistrationValidation - OfficerRegistrationValidation - Error Occured When validating UserName
1135561 [http-8084-1] ERROR com.crimetrack.service.OfficerRegistrationValidation - Message
java.lang.NullPointerException
at com.crimetrack.service.OfficerRegistrationValidation.validate(OfficerRegistrationValidation.java:61)
at org.springframework.validation.DataBinder.validate(DataBinder.java:725)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doBind(HandlerMethodInvoker.java:815)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:367)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:171)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
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:127)
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:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
당신이 날 제공 할 수있는 링크가있는 봄 주석을 사용하는 방법을 이해하고 – devdar
그들을 구성 IOC doc이 하나입니다. http://static.springsource.org/spring/docs/current/spring-framework-reference/html/beans.html#beans-annotation-config를 참조하십시오. –