SpringBoot配置外部Tomcat並支援JSP

hyc2zbj發表於2019-06-23
Spring BootTomcatJS

1、使用idea建立springboot應用，指定打包方式為war，選擇web依賴

 2、將pom.xml中spring-boot-starter-tomcat的scope屬性設定為provided並新增jstl等依賴，此時pom.xml如下：

<?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">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.hyc</groupId>
    <artifactId>hello-web</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>hello-web</name>
    <description>Spring Boot使用外部tomcat並支援JSP</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <!-- 必須 -->
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

3、專案建立完成後會自動生成HelloWebApplication和ServletInitializer兩個類，我們不用修改這兩個類

4、工具沒有自動幫我們生成webapp資料夾和web.xml需要我們手工生成，有兩中辦法，一是手動建立資料夾和檔案，二是利用idea建立，我這裡使用第二種方式，需要指定webapp資料夾和web.xml檔案的路徑，如圖：aa

5、編寫jsp和controller，JSP檔案放在webapp/WEB-INF/jsp下

// HelloController.java
package com.hyc.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.Date;
import java.util.Map;

@Controller
public class HelloController {
    @Value("${application.message:Hello World}")
    private String message = "Hello World";

    @GetMapping("/hello")
    @ResponseBody
    public String hello(){
        return "hello";
    }

    @GetMapping("/welcome")
    public String welcome(Map<String, Object> model) {
        model.put("time", new Date());
        model.put("message", this.message);
        return "welcome";
    }
}

 

<!-- welcome.jsp -->
<!DOCTYPE html>

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

<html lang="en">

<body>
	<c:url value="/resources/text.txt" var="url"/>
	<spring:url value="/resources/text.txt" htmlEscape="true" var="springUrl" />
	Spring URL: ${springUrl} at ${time}
	<br>
	JSTL URL: ${url}
	<br>
	Message: ${message}
</body>

</html>

6、配置application.properties

server.port=8080

spring.mvc.view.prefix: /WEB-INF/jsp/
spring.mvc.view.suffix: .jsp
application.message: Hello HYC

7、專案結構如圖：

8、配置tomcat8

9、測試，訪問http://localhost:8080/welcome，結果如下：

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