之前項(xiàng)目中有個(gè)服務(wù)需要獨(dú)立出來鲫忍，同事用springboot改成了微服務(wù)憎账，這兩天沒啥忙的就給拿出瞅瞅?qū)W習(xí)一下~

Demo只是對(duì) 這個(gè)例子 重新寫了一遍加了一些注釋和自己的東西 = =

新建一個(gè)maven項(xiàng)目

我用的是IDEA益兄，新建maven項(xiàng)目時(shí)晨炕，記得添加一個(gè)屬性 archetypeCatalog=internal

archetypeCatalog表示插件使用的archetype元數(shù)據(jù)蒸播，不加這個(gè)參數(shù)時(shí)默認(rèn)為remote匿醒，local场航，即中央倉(cāng)庫(kù)archetype元數(shù)據(jù)，由于中央倉(cāng)庫(kù)的archetype太多了廉羔，所以導(dǎo)致很慢溉痢，指定internal來表示僅使用內(nèi)部元數(shù)據(jù)

添加配置

在pom.xml文件添加響應(yīng)的配置

<?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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-tools</artifactId>
        <version>1.5.1.RELEASE</version>
    </parent>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <name>Spring Boot Configuration Processor</name>
    <description>Spring Boot Configuration Processor</description>
    <url>http://projects.spring.io/spring-boot/</url>
    <organization>
        <name>Pivotal Software, Inc.</name>
        <url>http://www.spring.io</url>
    </organization>
    <properties>
        <main.basedir>${basedir}/../..</main.basedir>
    </properties>
    <dependencies>
        <!-- Compile (should stick to the bare minimum) -->
        <dependency>
            <groupId>com.vaadin.external.google</groupId>
            <artifactId>android-json</artifactId>
        </dependency>
        <!-- Test -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test-support</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <!-- Ensure own annotation processor doesn't kick in -->
                    <proc>none</proc>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

在application.properties中寫入相關(guān)配置

server.port=9000

druid.url=jdbc:mysql://127.0.0.1:3306/test
druid.username=root
druid.password=root
druid.initialSize=1
druid.minIdle=1
druid.maxActive=20
druid.testOnBorrow=true

#springboot默認(rèn)的日志系統(tǒng)是logback
logging.level.tk.mybatis=TRACE

#freemarker 文件的路徑
spring.mvc.view.prefix=/templates/
spring.mvc.view.suffix=.ftl
spring.freemarker.cache=false
spring.freemarker.request-context-attribute=request

#mybatis掃描的文件路徑
mybatis.type-aliases-package=tk.yoruo.springboot.model
mybatis.mapper-locations=classpath:mapper/*.xml

#通用mapper的配置
mapper.mappers=tk.yoruo.springboot.util.MyMapper
mapper.not-empty=false
mapper.identity=MYSQL

#mybatis分頁(yè)插件的配置
pagehelper.helper-dialect=mysql
pagehelper.reasonable=true
pagehelper.support-methods-arguments=true
pagehelper.params=count=countSql

靜態(tài)資源的路徑

用了freemarker模版引擎 配置一些靜態(tài)資源文件路徑

package tk.yoruo.springboot.conf;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * Created by LXC on 2017/2/9.
 */
@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

    /**
     * spring-boot配置外部靜態(tài)資源的方法
     *
     * @param registry
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
    }
}

其他的service層，實(shí)體憋他，controller就不闡述了孩饼。

添加數(shù)據(jù)庫(kù)配置

創(chuàng)建一個(gè)DruidProperties的類

添加一些屬性。并加上@ConfigurationProperties(prefix = "druid")注解竹挡，告訴boot這個(gè)是個(gè)讀取配置文件的類并且從 application.properties 中取前綴為 druid的value镀娶。

接著創(chuàng)建DruidAutoConfiguration類 加上@Configuration告訴boot這個(gè)是配置類。

注入DruidProperties 并加入@Bean

package tk.yoruo.springboot.druid;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.sql.SQLException;

/**
 * Created by LXC on 2017/2/9.
 */

@Configuration
@EnableConfigurationProperties(DruidProperties.class)
// 對(duì)應(yīng)的類在classpath中有存在時(shí)才會(huì)注入
@ConditionalOnClass(DruidDataSource.class)

// 對(duì)應(yīng)的前綴和屬性名 在classpath中有存在時(shí)才會(huì)注入
@ConditionalOnProperty(prefix = "druid", name = "url")
public class DruidAutoConfiguration {

    @Autowired
    private DruidProperties druidProperties;

    @Bean
    public DruidDataSource dataSource() {

        DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setUrl(druidProperties.getUrl());
        druidDataSource.setUsername(druidProperties.getUsername());
        druidDataSource.setPassword(druidProperties.getPassword());
        if (druidProperties.getInitialSize() > 0) {
            druidDataSource.setInitialSize(druidProperties.getInitialSize());
        }
        if (druidProperties.getMinIdle() > 0) {
            druidDataSource.setMinIdle(druidProperties.getMinIdle());
        }
        if (druidProperties.getMaxActive() > 0) {
            druidDataSource.setMaxActive(druidProperties.getMaxActive());
        }
        druidDataSource.setTestOnBorrow(druidProperties.isTestOnBorrow());
        try {
            druidDataSource.init();
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
        return druidDataSource;
    }
}

接著 在src/main/resources目錄下新建META-INF文件夾揪罕，然后新建spring.factories文件梯码，這個(gè)文件用于告訴Spring Boot去找指定的自動(dòng)配置文件

所以spring.factories內(nèi)容為

# Auto Configure
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
tk.yoruo.springboot.druid.DruidAutoConfiguration

添加Druid Web監(jiān)控

分別繼承 Druid中的過濾器和servlet。

package tk.yoruo.springboot.druid;

import com.alibaba.druid.support.http.WebStatFilter;

import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;

/**
 * Created by LXC on 2017/2/8.
 */

@WebFilter(filterName = "druidWebStatFilter", urlPatterns = "/*",
        initParams = {
                @WebInitParam(name = "exclusions", value = "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*")// 忽略資源
        })
public class DruidStatFilter extends WebStatFilter {

}

package tk.yoruo.springboot.druid;

import com.alibaba.druid.support.http.StatViewServlet;

import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;

/**
 * Created by LXC on 2017/2/8.
 */

@SuppressWarnings("serial")
@WebServlet(urlPatterns = "/druid/*",
        initParams = {
                @WebInitParam(name = "allow", value = "127.0.0.1"),// IP白名單 (沒有配置或者為空好啰，則允許所有訪問)
//                @WebInitParam(name="deny",value="192.168.16.111"),// IP黑名單 (存在共同時(shí)轩娶，deny優(yōu)先于allow)
                @WebInitParam(name = "loginUsername", value = "admin"),// 用戶名
                @WebInitParam(name = "loginPassword", value = "admin"),// 密碼
                @WebInitParam(name = "resetEnable", value = "true")// 禁用HTML頁(yè)面上的“Reset All”功能
        })
public class DruidStatViewServlet extends StatViewServlet {

}

注意還需要在Application類上加入 @ServletComponentScan的注解，否則掃描不到你添加的servlet坎怪。

package tk.yoruo.springboot;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import tk.yoruo.springboot.util.MyMapper;

/**
 * Created by LXC on 2017/2/9.
 */


@Controller
@ServletComponentScan
@EnableWebMvc
//@ComponentScan(basePackages = {"tk.yoruo.springboot.controller","tk.yoruo.springboot.service"})
@SpringBootApplication
@MapperScan(basePackages = "tk.yoruo.springboot.mapper", markerInterface = MyMapper.class)
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    @RequestMapping("/")
    String home() {
        return "redirect:countries";
    }

}

注意

Application springboot啟動(dòng)的類罢坝，不建議放在頂級(jí)的包。例如src/main/java下面搅窿。

如果這樣做了會(huì)和我一樣出現(xiàn)這個(gè)錯(cuò)誤

** WARNING ** : Your ApplicationContext is unlikely to start due to a @ComponentScan of the default package.

如果一定要這樣做嘁酿，需要在Application上加這樣的注解。標(biāo)明你要掃描的包

@ComponentScan(basePackages = {"tk.yoruo.springboot.controller","tk.yoruo.springboot.service"})

這樣話靜態(tài)資源會(huì)找不到男应。

那應(yīng)該怎么找到... 我還沒去試 = =

建議別這樣做闹司，放在外面啟動(dòng)服務(wù)時(shí)間會(huì)變久。

歡迎光臨我的個(gè)人博客