spring boot 整合 tomcat
一、说明
1.1 项目结构说明
spring boot 整合 tomcat 后支持jsp 的使用（内置容器默认是不支持jsp），所以项目整合后采用jspController 跳转到show.jsp测试整合是否成功。
1.2 项目主要依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!--排除内置容器依赖 使用外部tomcat容器启动-->
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<!--使用外置容器时候SpringBootServletInitializer 依赖此包 -->
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
二、整合 tomcat
2.1 修改启动类，继承自SpringBootServletInitializer，并覆盖重写其中configure方法
/**
* 如果用外置tomcat,启动报错java.lang.NoClassDefFoundError: javax/el/ELManager
* 是因为tomcat 7.0 el-api包中没有ELManager类 , 切换tomcat 为8.0 以上版本即可
*/
@SpringBootApplication
public class SpringBootTomcatApplication extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
//传入SpringBoot应用的主程序
return application.sources(SpringBootTomcatApplication.class);
}
public static void main(String[] args) {
SpringApplication.run(SpringBootTomcatApplication.class, args);
}
}
2.2 在application.yml 中指定访问视图文件的前缀和后缀
spring:
mvc:
view:
prefix: /WEB-INF/jsp/
suffix: .jsp
2.3 新建controller和show.jsp 测试整合是否成功
@Controller
@RequestMapping("index")
public class JspController {
@RequestMapping
public String jsp(Model model){
Programmer programmer = new Programmer("heibai", 21, 1298.31f, LocalDate.now());
model.addAttribute("programmer",programmer);
return "show";
}
}
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>programmer</title>
<link rel="stylesheet" href="${pageContext.request.contextPath}/css/show.css">
</head>
<body>
<ul>
<li>姓名: ${programmer.name}</li>
<li>年龄: ${programmer.age}</li>
</ul>
</body>
</html>