[英]JSP and Spring Boot
我试图使用Spring Boot构建一个简单的欢迎页面(在jsp中)。
以下是项目结构
应用
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
public SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(Application.class);
}
}
APIController
@Controller
public class APIController {
@RequestMapping("/")
public String home() {
System.out.println("testing");
return "welcome";
}
}
当我访问http://localhost:8080/
,我得到以下错误
此应用程序没有/ error的显式映射,因此您将此视为回退。
5月23日星期三15:31:51 MYT 2018年出现意外错误(type = Not Found,status = 404)。 没有可用的消息
通过卷曲
{"timestamp":1527061233703,"status":404,"error":"Not Found","message":"No message available","path":"/"}
的pom.xml
<?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>
<artifactId>spring-boot-web-jsp</artifactId>
<packaging>war</packaging>
<name>Spring Boot Web JSP Example</name>
<description>Spring Boot Web JSP Example</description>
<version>1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- This is a web application -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- Optional, test for static content, bootstrap CSS-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>3.3.7</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- Package as an executable jar/war -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
确保在依赖项列表中有jasper和jstl:
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
这是一个有效的入门项目 - https://github.com/spring-projects/spring-boot/tree/master/spring-boot-samples/spring-boot-sample-web-jsp
在目录\\src\\main\\resources\\static
,创建一个简单的index.html
文件
<html>
<head>Hello, Bich Van</head>
<body>
<h3>Today is a rainny day</h3>
</body>
</html>
然后在http:// localhost:8080再试一次
如果您不喜欢静态HTML文件,可以使用JSP,但需要一点复杂。 您需要在Spring MVC配置中声明JSP View解析器。
参考文档: https : //docs.spring.io/spring-boot/docs/current/reference/html/boot-features-developing-web-applications.html#boot-features-spring-mvc-welcome-page
最好在spring boot项目中使用thymeleaf并添加以下依赖项
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency>
在目录\\ src \\ main \\ resources \\ template中 ,创建一个简单的index.html文件
您必须在application.properties文件中为jsp文件定义前缀和后缀,如下所示:
spring.mvc.view.prefix: /WEB-INF/jsp/
spring.mvc.view.suffix: .jsp
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