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  • Spring Boot 添加JSP支持【转】

     

    Spring Boot 添加JSP支持

       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

    1,FreeMarker
    2,Groovy
    3,Thymeleaf (spring 官网使用这个)
    4,Velocity
    5,JSP (貌似Spring Boot官方不推荐,STS创建的项目会在src/main/resources 下有个templates 目录,这里就是让我们放模版文件的,然后并没有生成诸如 SpringMVC 中的webapp目录)
    不过本文还是选择大家都熟悉的JSP来举例,因为使用JSP与默认支持的模版需要特殊处理,所以拿来举例更好。

    1)创建Maven web project

    使用Eclipse新建一个Maven Web Project ,项目取名为:

    spring-boot-jsp

    2)在pom.xml文件添加依赖

    <!-- spring boot parent节点,引入这个之后,在下面和spring boot相关的就不需要引入版本了; -->

        <parent>

           <groupId>org.springframework.boot</groupId>

           <artifactId>spring-boot-starter-parent</artifactId>

           <version>1.3.3.RELEASE</version>

        </parent>

    依赖包:

    <!-- web支持: 1、web mvc; 2、restful; 3、jackjson支持; 4、aop ........ -->

           <dependency>

               <groupId>org.springframework.boot</groupId>

               <artifactId>spring-boot-starter-web</artifactId>

           </dependency>

          

           <!-- servlet 依赖. -->

           <dependency>

               <groupId>javax.servlet</groupId>

               <artifactId>javax.servlet-api</artifactId>

               <scope>provided</scope>

           </dependency>

          

           <!--

               JSTL(JSP Standard Tag Library,JSP标准标签库)是一个不断完善的开放源代码的JSP标签库,是由apache的jakarta小组来维护的。JSTL只能运行在支持JSP1.2和Servlet2.3规范的容器上,如tomcat 4.x。在JSP 2.0中也是作为标准支持的。

              

               不然报异常信息:

               javax.servlet.ServletException: Circular view path [/helloJsp]: would dispatch back to the current handler URL [/helloJsp] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

                

            -->

           <dependency>

               <groupId>javax.servlet</groupId>

               <artifactId>jstl</artifactId>

           </dependency>

          

          

          

           <!-- tomcat 的支持.tomcat 支持必须加,不加的情况下,默认采用tomcat方式启动, 但是访问不到jsp页面 (报404错误)-->

           <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>

    Jdk编译版本:

    <build>

           <finalName>spring-boot-jsp</finalName>

           <plugins>

               <plugin>

                  <artifactId>maven-compiler-plugin</artifactId>

                  <configuration>

                      <source>1.8</source>

                      <target>1.8</target>

                  </configuration>

               </plugin>

           </plugins>

        </build>

    (3)application.properties配置

    上面说了spring-boot 不推荐JSP,想使用JSP需要配置application.properties。 
    添加src/main/resources/application.properties内容:

    # 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 Angel From application

    (4)编写测试Controller

    编写类:com.kfit.jsp.controller.HelloController:

    package com.kfit.jsp.controller;

    import java.util.Map;

    import org.springframework.beans.factory.annotation.Value;

    import org.springframework.stereotype.Controller;

    import org.springframework.web.bind.annotation.RequestMapping;

    /**

     * 测试

     * @version v.0.1

     */

    @Controller

    public class HelloController {

          

           // 从 application.properties 中读取配置,如取不到默认值为Hello Shanhy

        @Value("${application.hello:Hello Angel}")

        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";

           }

    }

    (5)编写JSP页面

     src/main 下面创建 webapp/WEB-INF/jsp 目录用来存放我们的jsp页面:helloJsp.jsp

    <%@ 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>Insert title here</title>

    </head>

    <body>

        helloJsp

        <hr>

        ${hello}

       

    </body>

    </html>

    (6)编写启动类

    编写App.java启动类:

    package com.kfit.jsp;

    import org.springframework.boot.SpringApplication;

    import org.springframework.boot.autoconfigure.SpringBootApplication;

    import org.springframework.boot.context.web.SpringBootServletInitializer;

    @SpringBootApplication

    public class App extends SpringBootServletInitializer {

    //    @Override

    //    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {

    //           return application.sources(App.class);

    //    }

          

           public static void main(String[] args) {

                  SpringApplication.run(App.class, args);

           }

    }

    右键Run As  Java Application访问:http://127.0.0.1:8080/helloJsp 可以访问到:

    helloJsp

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  • 原文地址:https://www.cnblogs.com/java-wp/p/6923409.html
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