详解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我们。