springmvc+thymeleaf搭建框架启动报错
最近项目开发需要用到thymeleaf前端界面模板引擎,所以提前了解学习一下,但是在框架搭建好了之后启动tomcat一直提示如下错误:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'templateResolver' defined in URL [file:/F:/work/apache-tomcat-7.0.57/webapps/TestDemo/WEB-INF/classes/spring-mvc.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.thymeleaf.templateresolver.ServletContextTemplateResolver]: No default constructor found; nested exception is java.lang.NoSuchMethodException: org.thymeleaf.templateresolver.ServletContextTemplateResolver.<init>() at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1105) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1050) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:666) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:632) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:680) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:551) at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:492) at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) at javax.servlet.GenericServlet.init(GenericServlet.java:158) at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1284) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1197) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1087) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5231) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5518) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1575) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1565) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.thymeleaf.templateresolver.ServletContextTemplateResolver]: No default constructor found; nested exception is java.lang.NoSuchMethodException: org.thymeleaf.templateresolver.ServletContextTemplateResolver.<init>() at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:85) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1098) ... 29 more Caused by: java.lang.NoSuchMethodException: org.thymeleaf.templateresolver.ServletContextTemplateResolver.<init>() at java.lang.Class.getConstructor0(Class.java:2810) at java.lang.Class.getDeclaredConstructor(Class.java:2053) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80) ... 30 more
大致的意思就是说没有发现templateResolver的构造方法,后来也是在网上查找资料,不过对于这个问题好像都没有遇到过,后来在thymeleaf的官网看了一下,在thymeleaf3.0版本中已经使用SpringResourceTemplateResolver代替了ServletContextTemplateResolver,由于我使用的是thymeleaf3.0,所以将配置文件中改为了SpringResourceTemplateResolver,结果再次启动tomcat就显示正常了。
修改配置前:
<bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver"> <property name="prefix" value="/WEB-INF/views/" /> <property name="suffix" value=".html" /> <property name="templateMode" value="HTML5" /> <property name="cacheable" value="false" /> </bean> <bean id="templateEngine" class="org.thymeleaf.spring4.SpringTemplateEngine"> <property name="templateResolver" ref="templateResolver" /> </bean> <bean class="org.thymeleaf.spring4.view.ThymeleafViewResolver"> <property name="templateEngine" ref="templateEngine" /> <property name="characterEncoding" value="UTF-8"/> </bean>
修改配置后:(注意下面代码中加粗、标绿的地方)
<bean id="templateResolver" class="org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver"> <property name="prefix" value="/WEB-INF/views/" /> <property name="suffix" value=".html" /> <property name="templateMode" value="HTML5" /> <property name="cacheable" value="false" /> </bean> <bean id="templateEngine" class="org.thymeleaf.spring4.SpringTemplateEngine"> <property name="templateResolver" ref="templateResolver" /> </bean> <bean class="org.thymeleaf.spring4.view.ThymeleafViewResolver"> <property name="templateEngine" ref="templateEngine" /> <property name="characterEncoding" value="UTF-8"/> </bean>
thymeleaf官网地址:http://www.thymeleaf.org/doc/articles/thymeleaf3migration.html
成功根本没有什么秘诀可言,如果真是有的话,就是两个:第一个就是坚持到底,永不放弃;第二个是当你想放弃的时候,回过头来看看第一个秘诀:坚持到底,永不放弃