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详解Spring Boot 添加JSP支持

2024-07-13 10:07:34
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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Application.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

<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">   <modelVersion>4.0.0</modelVersion>   <groupId>com.example</groupId>   <artifactId>spring-boot-jsp</artifactId>   <version>0.0.1-SNAPSHOT</version>   <packaging>war</packaging>    <properties>     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>   </properties>    <!-- Inherit defaults from Spring Boot -->   <parent>     <groupId>org.springframework.boot</groupId>     <artifactId>spring-boot-starter-parent</artifactId>     <version>1.4.0.RELEASE</version>   </parent>   <dependencies>     <!-- 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. -->     <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>   </dependencies>   <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> </project> 

(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

package com.example.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;  @Controller public class HelloController {   //从application中读取配置,如取不到默认值为hello jack   @Value("${application.hello:hello jack}")   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

在 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Application.java启动类:

package com.example;  import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.support.SpringBootServletInitializer; //import org.springframework.boot.context.web.SpringBootServletInitializer;   @SpringBootApplication public class Application extends SpringBootServletInitializer {    public static void main(String[] args){     SpringApplication.run(Application.class, args);   } }

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

helloJsp

Hello Angel From application

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VeVb武林网。


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