序言:
springboot默认不支持jsp,如果想在项目中使用,需要进行相关初始化工作。为了方便大家更好的开发,本案例可直接作为jsp开发的脚手架工程 springboot+war+jsp .
常见问题:
1.修改jsp需重启才能生效:
在生产环境中,springboot重新编译jsp可能会导致较大的性能损失,并且很难追查到问题根源,所以在最新的版本中,官方已经默认关闭此功能,详见jspservlet类的初始化参数。那么,如何解决这个问题呢?推荐两个解决办法:1.使用devtools 2. 添加配置(server.servlet.jsp.init-parameters.development=true)
2.各种404:
1.必须导入嵌入式容器和jasper解析器 2.必须创建webapp目录
正文:springboot 添加对jsp的支持
1. 搭建脚手架
首先使用 spring initializr 构建工程,其中源码和静态资源目录默认生成,这里只需手工添加web资源目录。如图:
2. 在pom.xml 添加相关依赖
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<?xml version= "1.0" encoding= "utf-8" ?> <project xmlns= "http://maven.apache.org/pom/4.0.0" xmlns:xsi= "http://www.w3.org/2001/xmlschema-instance" xsi:schemalocation= "http://maven.apache.org/pom/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" > <!--基本信息 --> <modelversion> 4.0 . 0 </modelversion> <groupid>com.hehe</groupid> <artifactid>springboot-web-jsp</artifactid> <version> 0.0 . 1 -snapshot</version> <!--打包格式:springboot使用jsp时需打包为war类型 --> <packaging>war</packaging> <!--继承父工程--> <parent> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-parent</artifactid> <version> 2.0 . 0 .m4</version> <relativepath/> </parent> <!--依赖管理 --> <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> </dependency> <dependency> <groupid>org.apache.tomcat.embed</groupid> <artifactid>tomcat-embed-jasper</artifactid> </dependency> <dependency> <groupid>javax.servlet</groupid> <artifactid>jstl</artifactid> </dependency> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-devtools</artifactid> </dependency> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-test</artifactid> <scope>test</scope> </dependency> </dependencies> <!--指定远程仓库(含插件) --> <repositories> <repository> <id>spring-snapshots</id> <url>http: //repo.spring.io/snapshot</url> <snapshots><enabled> true </enabled></snapshots> </repository> <repository> <id>spring-milestones</id> <url>http: //repo.spring.io/milestone</url> </repository> </repositories> <pluginrepositories> <pluginrepository> <id>spring-snapshots</id> <url>http: //repo.spring.io/snapshot</url> </pluginrepository> <pluginrepository> <id>spring-milestones</id> <url>http: //repo.spring.io/milestone</url> </pluginrepository> </pluginrepositories> <!--构建插件 --> <build> <plugins> <plugin> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-maven-plugin</artifactid> </plugin> </plugins> </build> </project> |
3. 启动类添加servlet支持
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@springbootapplication public class springbootwarjspapplication extends springbootservletinitializer { @override protected springapplicationbuilder configure(springapplicationbuilder builder) { return builder.sources(springbootwarjspapplication. class ); } public static void main(string[] args) { springapplication.run(springbootwarjspapplication. class , args); } } |
4. 添加mvc映射
application.yml 配置如下:
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spring: mvc: view: prefix: /web-inf/views/ # read from web resources dir suffix: .jsp |
5. 编写jsp页面
在 web-inf/views 目录下新建一个jsp文件
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<%@ page contenttype= "text/html;charset=utf-8" language= "java" %> <!doctype html> <html> <body> <marquee><p style= "font-size: 100px" >hello jsp !!</p> ![](${pagecontext.servletcontext.contextpath}/doge.gif) </marquee> </body> </html> |
6.启动项目
启动方式1:在ide启动webjspapplication,然后打开项目地址。
启动方式2:部署到外置tomcat,启动完成后,打开项目地址。这里需要注意的是,使用外置tomcat部署的时候,需要将嵌入式容器调整为provided级别。(防止冲突)
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<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> <scope>provided</scope> </dependency> |
7.单元测试
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@runwith (springrunner. class ) @springboottest (webenvironment = webenvironment.random_port) @dirtiescontext public class webjspapplicationtest { @autowired private testresttemplate resttemplate; @test public void testjspwithel() throws exception { responseentity<string> entity = resttemplate.getforentity( "/" , string. class ); assertthat(entity.getstatuscode()).isequalto(httpstatus.ok); assertthat(entity.getbody()).contains( "hello jsp" ); } } |
全文至此,有疑问的小伙伴可在评论下方进行交流。
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服务器之家。
原文链接:http://www.jianshu.com/p/de939365c472?utm_source=tuicool&utm_medium=referral