Spring Boot 添加JSP支持

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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.-->

       <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

 * @author Angel(QQ:412887952)

 * @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

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


Hello Angel From application

 

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