我试着在春天做登录和一些数据库操作(插入,删除),也帮助jsp.I对spring来说是全新的。我得到了以下错误,比如bean创建异常。我已经将dvd定义为servlet名称在web.xml中。所以我的dvd_servlet.xml文件如下所示
<beans.................>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
<bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/DVD"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</bean>
<bean name="DvdController" class="DvdController" >
<property name="dataSource" ref="dataSource"/>
</bean>
<bean name="LoginController" class="LoginController" >
<property name="dataSource" ref="dataSource"/>
</bean>
<bean name="AccountCreationController" class="AccountCreationController" >
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
我的LoginController就像
public class LoginController implements Controller {
int check;
private DataSource dataSource;
public void setDataSource(DataSource dataSource) {
this.dataSource=dataSource;
}
public DataSource getDataSource() {
return dataSource;
}
JdbcTemplate jdbcTemplate=new JdbcTemplate(dataSource);
@RequestMapping(value="/Login",method=RequestMethod.POST)
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) {
String userName = request.getParameter("userName");
String password=request.getParameter("password");
try {
String selectQuery=("SELECT * FROM USERDETAILS WHERE NAME='"+userName+"'AND PASSWORD='"+password+"'");
check=jdbcTemplate.update(selectQuery,new Object[]{});
System.out.println(check);
if(check!=0) {
response.sendRedirect("DvdController");
}
}
catch(IOException e) {
e.printStackTrace();
}
return new ModelAndView("failure");
}
我的错误如下:
org.springframework.beans.factory.BeanCreationException:创建名称为&#39; LoginController&#39;的bean时出错在ServletContext资源[/WEB-INF/dvd-servlet.xml]中定义:bean的实例化失败;嵌套异常是org.springframework.beans.BeanInstantiationException:无法实例化bean类[LoginController]:构造函数抛出异常;嵌套异常是java.lang.IllegalArgumentException:Property&#39; dataSource&#39;是必须的 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(支持:AbstractAutowireCapableBeanFactory.java):965) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(支持:AbstractAutowireCapableBeanFactory.java):911) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(支持:AbstractAutowireCapableBeanFactory.java):485) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(支持:AbstractAutowireCapableBeanFactory.java):456) org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject(支持:AbstractBeanFactory.java):291) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(支持:DefaultSingletonBeanRegistry.java):222) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(支持:AbstractBeanFactory.java):288) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(支持:AbstractBeanFactory.java):190) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(支持:DefaultListableBeanFactory.java):580) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458)
根本原因
org.springframework.beans.BeanInstantiationException:无法实例化bean类[LoginController]:构造函数抛出异常;嵌套异常是java.lang.IllegalArgumentException:Property&#39; dataSource&#39;是必须的 org.springframework.beans.BeanUtils.instantiateClass(豆:BeanUtils.java):141) org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(支持:SimpleInstantiationStrategy.java):74) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(支持:AbstractAutowireCapableBeanFactory.java):958) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(支持:AbstractAutowireCapableBeanFactory.java):911) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(支持:AbstractAutowireCapableBeanFactory.java):485) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(支持:AbstractAutowireCapableBeanFactory.java):456) org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject(支持:AbstractBeanFactory.java):291) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(支持:DefaultSingletonBeanRegistry.java):222) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(支持:AbstractBeanFactory.java):288) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(支持:AbstractBeanFactory.java):190) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(支持:DefaultListableBeanFactory.java):580) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458)
根本原因
java.lang.IllegalArgumentException:Property&#39; dataSource&#39;是必须的 org.springframework.jdbc.support.JdbcAccessor.afterPropertiesSet(支持:JdbcAccessor.java):134) 。org.springframework.jdbc.core.JdbcTemplate(芯:JdbcTemplate.java):164) 的LoginController(LoginController.java:29) sun.reflect.NativeConstructorAccessorImpl.newInstance0(本机方法) sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) java.lang.reflect.Constructor.newInstance(Constructor.java:513) org.springframework.beans.BeanUtils.instantiateClass(豆:BeanUtils.java):126) org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(支持:SimpleInstantiationStrategy.java):74) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(支持:AbstractAutowireCapableBeanFactory.java):958) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(支持:AbstractAutowireCapableBeanFactory.java):911) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(支持:AbstractAutowireCapableBeanFactory.java):485) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(支持:AbstractAutowireCapableBeanFactory.java):456) org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject(支持:AbstractBeanFactory.java):291) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(支持:DefaultSingletonBeanRegistry.java):222) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(支持:AbstractBeanFactory.java):288) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(支持:AbstractBeanFactory.java):190) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(支持:DefaultListableBeanFactory.java):580) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339)
请帮我清除这个!!!
答案 0 :(得分:1)
我在这里看到两个问题:
<bean name="LoginController" class="LoginController" >
<property name="dataSource" ref="dataSource"/>
</bean>
LoginController真的是完全限定的类名吗?它应该像com.cy.LoginController
其次,Spring声明LoginController的构造函数需要属性dataSource。看起来LoginController需要构造函数注入dataSource,你正在做的是setter注入,所以试试这个:
而不是<property name="dataSource" ref="dataSource/>
,写道:
<constructor-arg ref="dataSource"/>