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    详解SpringBoot集成jsp(附源码)+遇到的坑

    本文介绍了SpringBoot集成jsp(附源码)+遇到的坑 ,分享给大家

    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=Hello GOD

    5、Controller文件

    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.
     */
    @Controller
    
    public class HelloController {
    
     // 从 application.properties 中读取配置,如取不到默认值为Hello
     @Value("${application.hello:Hello}")
     private String hello;
    
    
     @RequestMapping("/helloJsp")
     public String helloJsp(MapString, Object> map) {
      System.out.println("HelloController.helloJsp().hello=" + hello);
      map.put("hello", hello);
      return "helloJsp";
    
     }
    
    }
    
    

    6、jsp页面

    %@ 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">
    html>
    head>meta http-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: 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]
     ... 17 common frames omitted
    
    

     解决方案:添加以下依赖

      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:152) ~[spring-core-4.3.2.RELEASE.jar:4.3.2.RELEASE]
     ... 21 common frames omitted
    Caused 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]
     ... 25 common frames omitted

    解决方案:添加 

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

    删除其他依赖中的scope>provided/scope>

    8、源码地址

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

    以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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