Springboot整合（1）——springboot基础配置
1. pom文件中添加依赖，此处贴出pom文件，注释对每个节点做了解释
<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>
<groupId>tech.luoyu.product</groupId>
<artifactId>KnowledgeIsland</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>KnowledgeIsland</name>
<description>KnowledgeIsland</description>
<!-- 引用parent，则后面用到的所有springboot相关的依赖不需要写版本号 -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.8.RELEASE</version>
</parent>
<dependencies>
<!-- springboot包，web包 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- jasper包 -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<!-- 在jsp中使用jstl标签 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
<build>
<finalName>KnowledgeIsland</finalName>
<plugins>
<!--springloaded hot deploy，使用此插件，可让项目运行时支持热部署，运行方法：run as —— maven build —— spring-boot:run -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>springloaded</artifactId>
<version>1.2.4.RELEASE</version>
</dependency>
</dependencies>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
<configuration>
<classifier>exec</classifier>
</configuration>
</execution>
</executions>
</plugin>
<!-- 配置maven远吗编译版本 -->
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
2. 在resources目录下创建springboot配置文件application.yml，其内容如下
server:
port: 8088
context-path: /KnowledgeIsland
##不加下面的配置的话jsp修改了无法立刻生效
jsp-servlet:
init-parameters:
development: true
注：视图控制器也可在配置文件里配置，配置方法为：
spring:
view:
prefix: /WEB-INF/jsp/
suffix: .jsp
但不推荐，因为在这里配置会有一个小问题： controller中的requestMapping里配置的路径不能和返回的view路径相同，否则就会报Circular view path 错误；推荐在@Configuration配置类里进行配置
3. 创建Configuration配置类，springboot最大的好处就是精简配置，写java代码就可以完成配置。当前配置类只需要配置视图处理器即可。
@Configuration
publicclass MyWebAppConfigurer extends WebMvcConfigurerAdapter {
/**
* 视图处理器
*/
@Bean
public ViewResolver viewResolver() {
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/jsp/");
viewResolver.setSuffix(".jsp");
returnviewResolver;
}
}
注：springboot在启动的时候会自动扫描所有带有Configuration注解的类，完成对容器的配置。
4. Springboot启动类
@SpringBootApplication// @SpringBootApplication=@Configuration+@ComponentScan+@EnableAutoConfiguration
publicclass Application {
publicstaticvoid main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
5. 创建IndexController
@Controller
publicclass IndexController {
@RequestMapping(value = { "", "index" })
public ModelAndView index() {
Map<String, Object> model = new HashMap<String, Object>();
model.put("message", "Welcome!");
returnnew ModelAndView("index");
}
}
6. 创建index.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>index</title>
</head>
<body>
${message}
</body>
</html>
注：这几个文件的目录结构可参考下图
7. 运行application.java, 打开浏览器访问http://localhost:8088/KnowledgeIsland/，完成
