SpringBoot集成jsp（附源码）+遇到的坑

2021-08-30 159

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简介： SpringBoot集成jsp（附源码）+遇到的坑

1、大体步骤

（1）创建Maven web project；

（2）在pom.xml文件添加依赖；

（3）配置application.properties支持jsp

（4）编写测试Controller

（5）编写JSP页面

（6）编写启动类App.java

2、新建SpringInitialzr

3、pom文件

<dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId><scope>provided</scope></dependency><dependency><groupId>org.apache.tomcat.embed</groupId><artifactId>tomcat-embed-jasper</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies>

4、application.properties文件

#页面默认前缀目录spring.mvc.view.prefix=/WEB-INF/jsp/#响应页面默认后缀spring.mvc.view.suffix=.jsp#自定义属性，可以在Controller中读取application.hello=HelloGOD

5、Controller文件

packagecom.example;
importorg.springframework.beans.factory.annotation.Value;
importorg.springframework.stereotype.Controller;
importorg.springframework.web.bind.annotation.RequestMapping;
importjava.util.Map;
/*** Created by Gensis on 2016/9/9.*/@ControllerpublicclassHelloController {
// 从 application.properties 中读取配置，如取不到默认值为Hello@Value("${application.hello:Hello}")
privateStringhello;
@RequestMapping("/helloJsp")
publicStringhelloJsp(Map<String, Object>map) {
System.out.println("HelloController.helloJsp().hello="+hello);
map.put("hello", hello);
return"helloJsp";
    }
}

6、jsp页面

<%@pagelanguage="java"contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><!DOCTYPEhtmlPUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"><html><head><metahttp-equiv="Content-Type"content="text/html; charset=UTF-8"><title>GOD</title></head><body>helloJsp<hr>${hello}
</body></html>

7、遇到的问题

1、Spring Boot: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean

把pom中所有的<scope>provided</scope>注释掉

2、报404

<1>注意controller和restcontroller区别

　　<2>检查application.properties

　　<3>检查pom是否缺支持jsp包

3、Failed to introspect annotated methods on class org.springframework.boot.web.support.SpringBootServletInitializer

org.springframework.beans.factory.BeanDefinitionStoreException: Failedtoparseconfigurationclass [com.example.SampleWebJspApplication]; nestedexceptionisjava.lang.IllegalStateException: Failedtointrospectannotatedmethodsonclassorg.springframework.boot.web.support.SpringBootServletInitializeratorg.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:187) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:321) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:243) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:98) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:681) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:523) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
atorg.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
atorg.springframework.boot.SpringApplication.run(SpringApplication.java:313) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
atorg.springframework.boot.SpringApplication.run(SpringApplication.java:1185) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
atorg.springframework.boot.SpringApplication.run(SpringApplication.java:1174) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
atcom.example.SampleWebJspApplication.main(SampleWebJspApplication.java:20) [classes/:na]
atsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod) ~[na:1.8.0_77]
atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_77]
atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_77]
atjava.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_77]
atcom.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na]
Causedby: java.lang.IllegalStateException: Failedtointrospectannotatedmethodsonclassorg.springframework.boot.web.support.SpringBootServletInitializeratorg.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods(StandardAnnotationMetadata.java:163) ~[spring-core-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:301) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:237) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:204) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
atorg.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:173) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 17commonframesomitted

解决方案：添加以下依赖

<groupId>org.apache.tomcat.embed</groupId>

<artifactId>tomcat-embed-jasper</artifactId>

</dependency>

4、java.lang.NoClassDefFoundError: javax/servlet/ServletContext

Causedby: java.lang.NoClassDefFoundError: javax/servlet/ServletContextatjava.lang.Class.getDeclaredMethods0(NativeMethod) ~[na:1.8.0_77]
atjava.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_77]
atjava.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_77]
atorg.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods(StandardAnnotationMetadata.java:152) ~[spring-core-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 21commonframesomittedCausedby: java.lang.ClassNotFoundException: javax.servlet.ServletContextatjava.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_77]
atjava.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_77]
atsun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_77]
atjava.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_77]
    ... 25commonframesomitted

解决方案

<dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId></dependency>

8、源码地址

https://github.com/Genesisxu/SpringSeries/tree/master/SpringBoot-jsp