Spring Boot中使用jsp视图模板-Java编程之
本文简介
本文将学习怎么创建spring boot项目并在spring boot项目中使用JSP模板作为视图层。这里会使用嵌入的tomcat server去运行这个程序。一、项目结构图
二、maven依赖文件pom.xml
这个应用将会使用以下依赖:<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.howtodoinjava</groupId>
<artifactId>spring-boot-demo</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>spring-boot-demo Maven Webapp</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.1.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- Web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Tomcat Embed -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
<!-- To compile JSP files -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
</dependencies>
</project>三、spring boot应用的初始类
首先创建一个可部署的war文件的第一步是提供一个SpringBootServletInitializer子类和覆盖其配置()方法。这将使用Spring Framework的Servlet 3.0支持，并允许您在Servlet容器启动时配置您的应用程序。import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
@SpringBootApplication
public class SpringBootWebApplication extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
return application.sources(SpringBootWebApplication.class);
}
public static void main(String[] args) throws Exception {
SpringApplication.run(SpringBootWebApplication.class, args);
}
}
四、Spring Controller
控制器类可以将方法映射到应用程序中的特定url。在给定的应用程序中，它有两个视图,“/”和“/next”
import java.util.Map;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class IndexController {
@RequestMapping("/")
public String home(Map<String, Object> model) {
model.put("message", "HowToDoInJava Reader !!");
return "index";
}
@RequestMapping("/next")
public String next(Map<String, Object> model) {
model.put("message", "You are in new page !!");
return "next";
}
}五、配置JSP视图解析器
解析jsp文件有两种方法可行5.1在application.properties中添加以下内容:
spring.mvc.view.prefix=/WEB-INF/view/
spring.mvc.view.suffix=.jsp
//For detailed logging during development
logging.level.org.springframework=TRACE
logging.level.com=TRACE5.2配置InternalResourceViewResolver
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;
@Configuration
@EnableWebMvc
@ComponentScan
public class MvcConfiguration extends WebMvcConfigurerAdapter
{
@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/view/");
resolver.setSuffix(".jsp");
resolver.setViewClass(JstlView.class);
registry.viewResolver(resolver);
}
}
六、JSP文件编写
index.jsp
<!DOCTYPE html>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<html lang="en">
<body>
<div>
<div>
<h1>Spring Boot JSP Example</h1>
<h2>Hello ${message}</h2>
Click on this <strong><a href="next">link</a></strong> to visit another page.
</div>
</div>
</body>
</html><!DOCTYPE html>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<html lang="en">
<body>
<div>
<div>
<h1>Another page</h1>
<h2>Hello ${message}</h2>
Click on this <strong><a href="/">link</a></strong> to visit previous page.
</div>
</div>
</body>
</html>七、运行程序
在将整个代码编写并放置在文件夹中之后,通过在SpringBootWebApplication 类中执行main()方法来运行应用程序打开浏览器:http://localhost:8080/
点击next
八、例子下载
点击下载地址：https://www.leftso.com/article/237.html