spring boot项目摸索

之前我自己配置了一下 springboot 项目给大家分享一下自己整合的经验比较完整的一段代码
希望能够帮到大家

首先eclipise 下载boot 插件

help–>Eclipse Marketplace 下的Search中搜索spring-tool-suite（网好的情况下可以选择这种安装模式）
下载好重启eclipse 会发现有一个 spring Starter Project 这样就可以直接创建一个快捷的spring boot 项目
配置一些main函数

package online.example.development;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.scheduling.annotation.EnableScheduling;


@ComponentScan(value={"com.example.demo","online.example.development"})
@SpringBootApplication
//定时器注解
@EnableScheduling
public class Application extends SpringBootServletInitializer{
	 @Value("${server.port}")
	   private static String port;
	
	@Override
	  protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
	        return application.sources(Application.class);
	    }

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

}

ComponentScan 注解描述的是项目启动的时候所要扫描的包我配置的两个一个是基本业务代码路径一个是配置注入bean的文件路径这里会报错原因是缺少一些jar 包

所以需要早pom 中引入对应的jar 包

<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
		</dependency>
		<dependency>
	        <groupId>org.springframework.boot</groupId>
	        <artifactId>spring-boot-starter-tomcat</artifactId>
	        <scope>provided</scope>
		</dependency>
	<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency> 

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

然后一个 spring boot 项目配置完毕如果能够正常启动表示配置·OK

spring boot 整合mybatis
在整合mybatis的时候走了很多冤枉路这里需要注意的是
第一扫描mapper 路径位置
第二 dataSource 的文件配置
话不多说直接上代码

jar包依赖必不可少

<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
			<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.1.1</version>
		</dependency>
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper</artifactId>
			<version>4.0.2</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.0.25</version>
		</dependency>

yml 配置核心所在

server:
  port: 8888
spring:
  datasource:
    url: jdbc:mysql://192.168.9.455:3306/ccgy_test?useUnicode=true&characterEncoding=utf8&autoReconnect=true&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver

这是坑最多的 dataSource 配置
顺带将pagehelper 也配置了直接用即可
如果项目出错了在注解上面加上 @Component注解

package online.example.development.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.github.pagehelper.PageHelper;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.stereotype.Component;
import org.springframework.transaction.PlatformTransactionManager;

import javax.sql.DataSource;
import java.util.Properties;

@Configuration
@MapperScan(basePackages = "com.example.demo.mapper", sqlSessionFactoryRef = "ninthSqlSessionFactory")
public class NinthDatabaseConfig {
	//private static Logger logger = Logger.getLogger(NinthDatabaseConfig.class);

	@Bean(name = "ninthDataSource")
	@ConfigurationProperties(prefix = "spring.datasource")
	public DataSource ninthDataSource() {
		DruidDataSource druidDataSource = new DruidDataSource();
		System.err.println("加载"+druidDataSource);
		return druidDataSource;
	}

	@Bean(name = "ninthSqlSessionFactory")
	public SqlSessionFactory ninthSqlSessionFactory() throws Exception {
		SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
	//	logger.info("ninth sqlsession--" + this.ninthDataSource().hashCode());
		sqlSessionFactoryBean.setDataSource(this.ninthDataSource());
		System.err.println("11111111111载");
		PageHelper pageHelper = new PageHelper();
		Properties properties = new Properties();
		properties.setProperty("dialect", "mysql");
		properties.setProperty("pageSizeZero", "true");
		properties.setProperty("reasonable", "false");
		properties.setProperty("params", "pageNum=pageHelperStart;pageSize=pageHelperRows;");
		properties.setProperty("supportMethodsArguments", "true");
		properties.setProperty("returnPageInfo", "none");
		pageHelper.setProperties(properties);
		Interceptor[] interceptors = new Interceptor[] { pageHelper };
		sqlSessionFactoryBean.setPlugins(interceptors);
		PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
		sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:/mapper/*.xml"));
		return sqlSessionFactoryBean.getObject();
	}


	@Bean(name = "ninthTxMan")
	public PlatformTransactionManager ninthTransactionManager() {
//		logger.info("ninth dataSource--" + this.ninthDataSource().hashCode());
		return new DataSourceTransactionManager(this.ninthDataSource());
	}
}

spring boot项目摸索

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