Spring Boot报错：Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

近期学校在学习Java ee，实验要求基于Spring Boot + JSP开发图书管理平台。用idea编写时经常遇到各种各样的问题，都无法好好得到解决。今天便遇见启动Tomcat出错的问题。

查阅网上资料，尝试了各种方法都不能解决我的问题。最后通过修改json jar包的版本，使其成为更高版本，最后问题得以解决，Spring Boot成功启动！

报错：

  1 Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

  2 2020-11-24 16:38:10.012 ERROR 15196 --- [  restartedMain] o.s.boot.SpringApplication               : Application run failed

  3

  4 org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat

  5     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:161) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

  6     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545) ~[spring-context-5.2.11.RELEASE.jar:5.2.11.RELEASE]

  7     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

  8     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

  9     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 10     at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:405) [spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 11     at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 12     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 13     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 14     at nuc.edu.zyd1813004804.library.LibraryApplication.main(LibraryApplication.java:15) [classes/:na]

 15     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_241]

 16     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_241]

 17     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_241]

 18     at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_241]

 19     at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 20 Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat

 21     at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:142) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 22     at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:104) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 23     at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:440) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 24     at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:193) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 25     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:178) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 26     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:158) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 27     ... 14 common frames omitted

 28 Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'formContentFilter' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.web.servlet.filter.OrderedFormContentFilter]: Factory method 'formContentFilter' threw exception; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.fasterxml.jackson.datatype.jsr310.JavaTimeModule]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/datatype/jsr310/ser/ZoneIdSerializer

 29     at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:655) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 30     at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:483) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 31     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 32     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1176) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 33     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 34     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 35     at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 36     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 37     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 38     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:207) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 39     at org.springframework.boot.web.servlet.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:211) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 40     at org.springframework.boot.web.servlet.ServletContextInitializerBeans.addAsRegistrationBean(ServletContextInitializerBeans.java:174) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 41     at org.springframework.boot.web.servlet.ServletContextInitializerBeans.addAsRegistrationBean(ServletContextInitializerBeans.java:169) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 42     at org.springframework.boot.web.servlet.ServletContextInitializerBeans.addAdaptableBeans(ServletContextInitializerBeans.java:154) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 43     at org.springframework.boot.web.servlet.ServletContextInitializerBeans.<init>(ServletContextInitializerBeans.java:86) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 44     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.getServletContextInitializerBeans(ServletWebServerApplicationContext.java:255) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 45     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.selfInitialize(ServletWebServerApplicationContext.java:229) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 46     at org.springframework.boot.web.embedded.tomcat.TomcatStarter.onStartup(TomcatStarter.java:53) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 47     at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5166) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 48     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 49     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 50     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 51     at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_241]

 52     at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 53     at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) ~[na:1.8.0_241]

 54     at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 55     at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:843) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 56     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 57     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 58     at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 59     at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_241]

 60     at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 61     at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) ~[na:1.8.0_241]

 62     at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 63     at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 64     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 65     at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 66     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 67     at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 68     at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 69     at org.apache.catalina.startup.Tomcat.start(Tomcat.java:486) ~[tomcat-embed-core-9.0.39.jar:9.0.39]

 70     at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:123) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 71     ... 19 common frames omitted

 72 Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.web.servlet.filter.OrderedFormContentFilter]: Factory method 'formContentFilter' threw exception; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.fasterxml.jackson.datatype.jsr310.JavaTimeModule]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/datatype/jsr310/ser/ZoneIdSerializer

 73     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 74     at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:650) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 75     ... 60 common frames omitted

 76 Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.fasterxml.jackson.datatype.jsr310.JavaTimeModule]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/datatype/jsr310/ser/ZoneIdSerializer

 77     at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:217) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 78     at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:139) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 79     at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.registerWellKnownModulesIfAvailable(Jackson2ObjectMapperBuilder.java:805) ~[spring-web-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 80     at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.configure(Jackson2ObjectMapperBuilder.java:669) ~[spring-web-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 81     at org.springframework.http.converter.json.Jackson2ObjectMapperBuilder.build(Jackson2ObjectMapperBuilder.java:652) ~[spring-web-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 82     at org.springframework.http.converter.json.MappingJackson2HttpMessageConverter.<init>(MappingJackson2HttpMessageConverter.java:59) ~[spring-web-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 83     at org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter.<init>(AllEncompassingFormHttpMessageConverter.java:76) ~[spring-web-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 84     at org.springframework.web.filter.FormContentFilter.<init>(FormContentFilter.java:61) ~[spring-web-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 85     at org.springframework.boot.web.servlet.filter.OrderedFormContentFilter.<init>(OrderedFormContentFilter.java:29) ~[spring-boot-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 86     at org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration.formContentFilter(WebMvcAutoConfiguration.java:165) ~[spring-boot-autoconfigure-2.3.6.RELEASE.jar:2.3.6.RELEASE]

 87     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_241]

 88     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_241]

 89     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_241]

 90     at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_241]

 91     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

 92     ... 61 common frames omitted

 93 Caused by: java.lang.NoClassDefFoundError: com/fasterxml/jackson/datatype/jsr310/ser/ZoneIdSerializer

 94     at com.fasterxml.jackson.datatype.jsr310.JavaTimeModule.<init>(JavaTimeModule.java:158) ~[jackson-datatype-jsr310-2.11.3.jar:2.11.3]

 95     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_241]

 96     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_241]

 97     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_241]

 98     at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_241]

 99     at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:204) ~[spring-beans-5.2.11.RELEASE.jar:5.2.11.RELEASE]

100     ... 75 common frames omitted

101

102

103 Process finished with exit code 0

解决：

对应pom.xml：

 1 <dependency>

 2     <groupId>com.fasterxml.jackson.core</groupId>

 3     <artifactId>jackson-annotations</artifactId>

 4     <version>2.11.0</version>

 5 </dependency>

 6 <dependency>

 7     <groupId>com.fasterxml.jackson.core</groupId>

 8     <artifactId>jackson-core</artifactId>

 9     <version>2.11.0</version>

10 </dependency>

11 <dependency>

12     <groupId>com.fasterxml.jackson.core</groupId>

13     <artifactId>jackson-databind</artifactId>

14     <version>2.11.0</version>

15 </dependency>

SpringBoot报错：Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.的更多相关文章

  1. springboot启动报错,Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

    报错: Error starting ApplicationContext. To display the conditions report re-run your application with ...

  2. Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.

    Error starting ApplicationContext. To display the conditions report re-run your application with 'de ...

  3. 多个类用@feignclient标注同一个服务,出错问题:Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.Caused by: org.springframework.beans.factory.support.Bea..

    如果标注了两个或以上类 @FeignClient 标注同一个 服务名称 调用方会主配置类启动会报错 测试类报错 java.lang.IllegalStateException: Failed to l ...

  4. spring boot启动报错Error starting ApplicationContext（未能配置数据源）

    主要错误:Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource c ...

  5. IDEA报错：Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled. （'crmWatcherService'错误）

    单表插入项目,插入前正常,插入后运行webapplication报错: run: debug: 于webapplication报错: Injection of autowired dependenci ...

  6. Debug - SpringBoot - Error starting ApplicationContext. To display the auto-configuration report re-runyour application

    Error log 2019-12-07 22:33:03.959 ERROR 3760 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter : ** ...

  7. 解决 docker 报错: Error starting daemon: error initializing graphdriver: backing file system is unsupported for this graph driver

    CentOS 7.5 x64下 sudo yum install docker -y systemctl enable docker systemctl start docker 发现启动失败 jou ...

  8. 关于MyEclipse启动报错:Error starting static Resources;下面伴随Failed to start component [StandardServer[8005]]; A child container failed during start.的错误提示解决办法.

    最后才发现原因是Tomcat的server.xml配置文件有问题:apache-tomcat-7.0.67\conf的service.xml下边多了类似与 <Host appBase=" ...

  9. 倍福TwinCAT(贝福Beckhoff)常见问题(FAQ)-点击运行按钮进入到运行状态报错Error starting TwinCAT System怎么办 AdsWarning1823怎么办

    一般提示如下   点击Device,然后选中当前真正连接到的网卡   一般是由于重装系统之后,没有把本来是realtime capable的设备Install,所以找不到支持EtherCAT的设备导致 ...

随机推荐

  1. 精尽Spring Boot源码分析 - 剖析 @SpringBootApplication 注解

    该系列文章是笔者在学习 Spring Boot 过程中总结下来的,里面涉及到相关源码,可能对读者不太友好,请结合我的源码注释 Spring Boot 源码分析 GitHub 地址 进行阅读 Sprin ...

  2. MPP大规模并行处理架构详解

    面试官:说下你知道的MPP架构的计算引擎? 这个问题不少小伙伴在面试时都遇到过,因为对MPP这个概念了解较少,不少人都卡壳了,但是我们常用的大数据计算引擎有很多都是MPP架构的,像我们熟悉的Impal ...

  3. RabbitMQ消息可靠性传输

    消息的可靠性投递是使用消息中间件不可避免的问题,不管是使用kafka.rocketMQ或者rabbitMQ,那么在RabbitMQ中如何保证消息的可靠性投递呢? 先再看一下RabbitMQ消息传递的流 ...

  4. HTTP：Java实现HTTP请求的三种方式

    目前JAVA实现HTTP请求的方法用的最多的有两种: 一种是通过HTTPClient这种第三方的开源框架去实现.HTTPClient对HTTP的封装性比较不错,通过它基本上能够满足我们大部分的需求,H ...

  5. 32. Longest Valid Parentheses **堆栈

    description: Given a string containing just the characters '(' and ')', find the length of the longe ...

  6. gitlab配置邮箱服务

    目录 1. SMTP服务 2. 服务端配置 3. 更新配置 4. 邮件测试 当需要进行 账号注册,创建项目,或合并分支等操作时,可通过邮件通知.邮件验证的方式实现. 1. SMTP服务 用于配置在服务 ...

  7. 打造一个window桌面应用：在线聊天对话机器人

    大家好,我是辰哥~~~ 本文目标:打造一个window桌面应用:在线聊天对话机器人. 今天辰哥教大家做一个在线聊天对话机器人桌面应用,已经打包成exe可执行文件,读者可以直接拿来使用, 先上演示图 聊 ...

  8. 【LeetCode】27.移除元素

    27.移除元素 知识点:数组:双指针:: 题目描述 给你一个数组 nums 和一个值 val,你需要 原地 移除所有数值等于 val 的元素,并返回移除后数组的新长度. 不要使用额外的数组空间,你必须 ...

  9. Hive——连接方式

    Hive--连接方式   一.CLI连接 直接通过CLI连接hive,进行相关hive sql 操作. 直接使用 hive-1.1.0-cdh5.7.0/bin/hive 命令即可 hive> ...

  10. js表单插件

    参考:https://www.html5tricks.com/category/jquery-plugin/jquery-form