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