Springboot integrated JSP (with source code) + encountered pits

1, the overall step

(1) Create MAVEN Web project;

(2) Add dependency in Pom.xml file;

(3) Configuring Application.properties support JSP

(4) Writing test controller

(5) Writing JSP pages

(6) Writing the startup class App.java

2. New SPRINGINITIALZR

3. Pom file

    <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 file

# page Default prefix directory spring.mvc.view.prefix=/web-inf/jsp/# response page default suffix spring.mvc.view.suffix=.jsp# custom properties, Can read Application.hello=hello GOD in the controller

5. controller file

Package Com.example;import Org.springframework.beans.factory.annotation.value;import Org.springframework.stereotype.controller;import Org.springframework.web.bind.annotation.requestmapping;import java.util.map;/** * Created by gensis on 2016/9/9. */@Controllerpublic class Hellocontroller {    //Read the configuration from application.properties, such as the default value of Hello    @Value ("${ Application.hello:Hello} ")    private String hello;    @RequestMapping ("/hellojsp") public    String hellojsp (map<string, object> Map) {        System.out.println (" Hellocontroller.hellojsp (). hello= "+ Hello";        Map.put ("Hello", hello);        return "hellojsp";    }}

6. JSP page

<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "pageencoding=" UTF-8 "%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" >
7. Problems encountered 1, Spring boot:unable to start embeddedwebapplicationcontext due to missing embeddedservletcontainerfactory bean
Comment out all the <scope>provided</scope> in POM
2, reported 404
<1> Note Controller and Restcontroller differences
<2> Check Application.properties
<3> Check if POM is missing support JSP package
3, Failed to Introspect annotated methods on class Org.springframework.boot.web.support.SpringBootServletInitializer  
Org.springframework.beans.factory.BeanDefinitionStoreException:Failed to parse Configuration class [ Com.example.SampleWebJspApplication]; Nested exception is java.lang.IllegalStateException:Failed to Introspect annotated methods on class Org.springframework. Boot.web.support.SpringBootServletInitializer at Org.springframework.context.annotation.ConfigurationClassParser.parse (configurationclassparser.java:187) ~[ Spring-context-4.3.2.release.jar:4.3.2.release] At Org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions ( configurationclasspostprocessor.java:321) ~[spring-context-4.3.2.release.jar:4.3.2.release] at Org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry ( configurationclasspostprocessor.java:243) ~[spring-context-4.3.2.release.jar:4.3.2.release] at Org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors (Postprocessorregistrationdelegate.java:273) ~[spring-context-4.3.2.release.jar:4.3.2.release] at Org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors ( postprocessorregistrationdelegate.java:98) ~[spring-context-4.3.2.release.jar:4.3.2.release] at Org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors ( abstractapplicationcontext.java:681) ~[spring-context-4.3.2.release.jar:4.3.2.release] at Org.springframework.context.support.AbstractApplicationContext.refresh (abstractapplicationcontext.java:523) ~[ Spring-context-4.3.2.release.jar:4.3.2.release] at Org.springframework.boot.SpringApplication.refresh ( springapplication.java:759) [Spring-boot-1.4.0.release.jar:1.4.0.release] at Org.springframework.boot.SpringApplication.refreshContext (springapplication.java:369) [ Spring-boot-1.4.0.release.jar:1.4.0.release] at Org.springframework.boot.SpringApplication.run ( springapplication.java:313) [spring-boot-1.4.0.release.jar:1.4.0.release] at Org.springframework.boot.SpringApplication.run (springapplication.java:1185) [ Spring-boot-1.4.0.release.jar:1.4.0.release] at Org.springframework.boot.SpringApplication.run ( springapplication.java:1174) [Spring-boot-1.4.0.release.jar:1.4.0.release] at Com.example.SampleWebJspApplication.main (SAMPLEWEBJSPAPPLICATION.JAVA:20) [Classes/:na] at SUN.REFLECT.NATIVEMETHODACCESSORIMPL.INVOKE0 (Native Method) ~[na:1.8.0_77] at Sun.reflect.NativeMethodAccessorImpl.invoke (nativemethodaccessorimpl.java:62) ~[na:1.8.0_77] at Sun.reflect.DelegatingMethodAccessorImpl.invoke (delegatingmethodaccessorimpl.java:43) ~[na:1.8.0_77] at Java.lang.reflect.Method.invoke (method.java:498) ~[na:1.8.0_77] at Com.intellij.rt.execution.application.AppMain.main (appmain.java:147) [idea_rt.jar:na]caused by: Java.lang.IllegalStateException:Failed to Introspect annotated methods on class Org.springframework.boot.web.support.SpringBootServletInitializer at Org.spriNgframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods (standardannotationmetadata.java:163) ~[ Spring-core-4.3.2.release.jar:4.3.2.release] At Org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass ( configurationclassparser.java:301) ~[spring-context-4.3.2.release.jar:4.3.2.release] at Org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass ( configurationclassparser.java:237) ~[spring-context-4.3.2.release.jar:4.3.2.release] at Org.springframework.context.annotation.ConfigurationClassParser.parse (configurationclassparser.java:204) ~[ Spring-context-4.3.2.release.jar:4.3.2.release] At Org.springframework.context.annotation.ConfigurationClassParser.parse (configurationclassparser.java:173) ~[ Spring-context-4.3.2.release.jar:4.3.2.release] ... Common frames omitted
Solution: Add the following dependencies
        <dependency>            <groupId>org.apache.tomcat.embed</groupId>            <artifactId> Tomcat-embed-jasper</artifactid>        </dependency>
4, Java.lang.noclassdeffounderror:javax/servlet/servletcontext
caused by:java.lang.noclassdeffounderror:javax/servlet/servletcontext at    Java.lang.Class.getDeclaredMethods0 (Native Method) ~[na:1.8.0_77] at    java.lang.Class.privateGetDeclaredMethods (class.java:2701) ~[na:1.8.0_77] At    java.lang.Class.getDeclaredMethods (class.java:1975) ~[na:1.8.0_77]    at Org.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods (Standardannotationmetadata.java : ~[spring-core-4.3.2.release.jar:4.3.2.release]    ... Common frames omittedcaused By:java.lang.ClassNotFoundException:javax.servlet.ServletContext at    Java.net.URLClassLoader.findClass (urlclassloader.java:381) ~[na:1.8.0_77] at    java.lang.ClassLoader.loadClass (classloader.java:424) ~[na:1.8.0_77] at    sun.misc.launcher$appclassloader.loadclass (Launcher.java:331) ~[na : 1.8.0_77] at    java.lang.ClassLoader.loadClass (classloader.java:357) ~[na:1.8.0_77]    ... Common frames omitted
Solution: Add
        <dependency>            <groupId>javax.servlet</groupId>            <artifactid>javax.servlet-api </artifactId>        </dependency>        <dependency>            <groupid>javax.servlet</ groupid>            <artifactId>jstl</artifactId>        </dependency>
Remove the <scope>provided</scope> from other dependencies
8. Source Address
https://github.com/Genesisxu/SpringSeries/tree/master/SpringBoot-jsp
Springboot integrated JSP (with source code) + encountered pits