springboot框架整合

本文详细介绍SpringBoot的快速入门方法,包括环境搭建、基础项目构建及Http请求处理。涵盖SpringBoot的优点、依赖管理、自动配置原理,以及如何使用模板引擎渲染Web页面,数据访问集成JDBC、MyBatis、Spring Data JPA,多数据源配置,事务管理,日志记录,缓存支持等内容。

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Spring介绍

SpringBoot简介
在您第1次接触和学习Spring框架的时候,是否因为其繁杂的配置而退却了?在你第n次使用Spring框架的时候,是否觉得一堆反复黏贴的配置有一些厌烦?那么您就不妨来试试使用Spring Boot来让你更易上手,更简单快捷地构建Spring应用!
Spring Boot让我们的Spring应用变的更轻量化。比如:你可以仅仅依靠一个Java类来运行一个Spring引用。你也可以打包你的应用为jar并通过使用java -jar来运行你的Spring Web应用。
Spring Boot的主要优点:
为所有Spring开发者更快的入门
开箱即用,提供各种默认配置来简化项目配置
内嵌式容器简化Web项目
没有冗余代码生成和XML配置的要求
本章主要目标完成Spring Boot基础项目的构建,并且实现一个简单的Http请求处理,通过这个例子对Spring Boot有一个初步的了解,并体验其结构简单、开发快速的特性。
系统要求:
Java1.8及以上
Spring Framework 4.1.5及以上
本文采用Java 1.8.0_73、Spring Boot 1.3.2调试通过。
二、快速入门

创建一个Maven工程
名为”springboot-helloworld” 类型为Jar工程项目

pom文件引入依赖

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.3.3.RELEASE</version>
	</parent>
	<dependencies>
	  <!—SpringBoot web 组件 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>

spring-boot-starter-parent作用
在pom.xml中引入spring-boot-start-parent,spring官方的解释叫什么stater poms,它可以提供dependency management,也就是说依赖管理,引入以后在申明其它dependency的时候就不需要version了,后面可以看到。
spring-boot-starter-web作用
springweb 核心组件
spring-boot-maven-plugin作用
如果我们要直接Main启动spring,那么以下plugin必须要添加,否则是无法启动的。如果使用maven 的spring-boot:run的话是不需要此配置的。(我在测试的时候,如果不配置下面的plugin也是直接在Main中运行的。)

编写HelloWorld服务

创建package命名为com.xx.controller(根据实际情况修改)
创建HelloController类,内容如下

@RestController
@EnableAutoConfiguration
public class HelloController {
	@RequestMapping("/hello")
	public String index() {
		return "Hello World";
	}	
public static void main(String[] args) {
		SpringApplication.run(HelloController.class, args);
	}
}

@RestController
在上加上RestController 表示修饰该Controller所有的方法返回JSON格式,直接可以编写
Restful接口
@EnableAutoConfiguration
注解:作用在于让 Spring Boot 根据应用所声明的依赖来对 Spring 框架进行自动配置
这个注解告诉Spring Boot根据添加的jar依赖猜测你想如何配置Spring。由于spring-boot-starter-web添加了Tomcat和Spring MVC,所以auto-configuration将假定你正在开发一个web应用并相应地对Spring进行设置。
SpringApplication.run(HelloController.class, args);
标识为启动类
SpringBoot启动方式1
Springboot默认端口号为8080

@RestController
@EnableAutoConfiguration
public class HelloController {
	@RequestMapping("/hello")
	public String index() {
		return "Hello World";
	}	
public static void main(String[] args) {
		SpringApplication.run(HelloController.class, args);
	}
}

启动主程序,打开浏览器访问http://localhost:8080/index,可以看到页面输出Hello World
SpringBoot启动方式2

@ComponentScan(basePackages = "com.controller")---控制器扫包范围
@ComponentScan(basePackages = "com.controller")
@EnableAutoConfiguration
public class App {
	public static void main(String[] args) {
		SpringApplication.run(App.class, args);
	}
}

Web开发

静态资源访问

在我们开发Web应用的时候,需要引用大量的js、css、图片等静态资源。
默认配置
Spring Boot默认提供静态资源目录位置需置于classpath下,目录名需符合如下规则:
/static
/public
/resources
/META-INF/resources
举例:我们可以在src/main/resources/目录下创建static,在该位置放置一个图片文件。启动程序后,尝试访问http://localhost:8080/D.jpg。如能显示图片,配置成功。

全局捕获异常

@ExceptionHandler 表示拦截异常
@ControllerAdvice 是 controller 的一个辅助类,最常用的就是作为全局异常处理的切面类
@ControllerAdvice 可以指定扫描范围
@ControllerAdvice 约定了几种可行的返回值,如果是直接返回 model 类的话,需要使用 @ResponseBody 进行 json 转换
o返回 String,表示跳到某个 view
o返回 modelAndView
o返回 model + @ResponseBody

@ControllerAdvice
public class GlobalExceptionHandler {
	@ExceptionHandler(RuntimeException.class)
	@ResponseBody
	public Map<String, Object> exceptionHandler() {
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("errorCode", "101");
		map.put("errorMsg", "系統错误!");
		return map;
	}
}

渲染Web页面

渲染Web页面
在之前的示例中,我们都是通过@RestController来处理请求,所以返回的内容为json对象。那么如果需要渲染html页面的时候,要如何实现呢?
模板引擎
在动态HTML实现上Spring Boot依然可以完美胜任,并且提供了多种模板引擎的默认配置支持,所以在推荐的模板引擎下,我们可以很快的上手开发动态网站。
Spring Boot提供了默认配置的模板引擎主要有以下几种:

Thymeleaf
FreeMarker
Velocity
Groovy
Mustache

Spring Boot建议使用这些模板引擎,避免使用JSP,若一定要使用JSP将无法实现Spring Boot的多种特性,具体可见后文:支持JSP的配置
当你使用上述模板引擎中的任何一个,它们默认的模板配置路径为:src/main/resources/templates。当然也可以修改这个路径,具体如何修改,可在后续各模板引擎的配置属性中查询并修改。

使用Freemarker模板引擎渲染web视图

pom文件引入:
<!-- 引入freeMarker的依赖包. -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
后台代码
在src/main/resources/创建一个templates文件夹,后缀为*.ftl
	@RequestMapping("/index")
	public String index(Map<String, Object> map) {
	    map.put("name","美丽的天使...");
		return "index";
	}

前台代码

 <!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8" />
<title></title>
</head>
<body>
	  ${name}
</body> 
</html>

、Freemarker其他用法

@RequestMapping("/freemarkerIndex")
	public String index(Map<String, Object> result) {
		result.put("name", "yushengjun");
		result.put("sex", "0");
		List<String> listResult = new ArrayList<String>();
		listResult.add("zhangsan");
		listResult.add("lisi");
		listResult.add("xxxx");
		result.put("listResult", listResult);
		return "index";
	}

<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8" />
<title>首页</title>
</head>
<body>
	  ${name}
<#if sex=="1">
            男
      <#elseif sex=="2">
            女
     <#else>
        其他      
	  
	  </#if>	  
	 <#list userlist as user>
	   ${user}
	 </#list>
</body> 
</html>

Freemarker配置

新建application.properties文件
########################################################
###FREEMARKER (FreeMarkerAutoConfiguration)
########################################################
spring.freemarker.allow-request-override=false
spring.freemarker.cache=true
spring.freemarker.check-template-location=true
spring.freemarker.charset=UTF-8
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=false
spring.freemarker.expose-session-attributes=false
spring.freemarker.expose-spring-macro-helpers=false
#spring.freemarker.prefix=
#spring.freemarker.request-context-attribute=
#spring.freemarker.settings.*=
spring.freemarker.suffix=.ftl
spring.freemarker.template-loader-path=classpath:/templates/
#comma-separated list
#spring.freemarker.view-names= # whitelist of view names that can be resolved

使用JSP渲染Web视图
pom文件引入以下依赖

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.3.3.RELEASE</version>
	</parent>
	<dependencies>
		<!-- SpringBoot 核心组件 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
		</dependency>
		<dependency>
			<groupId>org.apache.tomcat.embed</groupId>
			<artifactId>tomcat-embed-jasper</artifactId>
		</dependency>
	</dependencies>

、在application.properties创建以下配置

spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

后台代码

@Controller
public class IndexController {
	@RequestMapping("/index")
	public String index() {
		return "index";
	}
}

注意:创建SpringBoot整合JSP,一定要为war类型,否则会找不到页面.

数据访问

springboot整合使用JdbcTemplate
pom文件引入

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.2.RELEASE</version>
	</parent>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jdbc</artifactId>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.21</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>

application.properties新增配置

spring.datasource.url=jdbc:mysql://localhost:3306/testsys?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&serverTimezone=Asia/Shanghai&useSSL=false
spring.datasource.username=root
spring.datasource.password=admin
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

UserService类

@Service
public class UserServiceImpl implements UserService {
	@Autowired
	private JdbcTemplate jdbcTemplate;
	public void createUser(String name, Integer age) {
		System.out.println("ssss");
		jdbcTemplate.update("insert into users values(null,?,?);", name, age);
	}
}

App类

	@ComponentScan(basePackages = "com.xx")
	@EnableAutoConfiguration
	public class App {
		public static void main(String[] args) {
			SpringApplication.run(App.class, args);
		}
	}	

spring-boot-starter-parent要在1.5以上
springboot整合使用mybatis
pom文件引入

<parent>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-parent</artifactId>
	<version>1.3.2.RELEASE</version>
	<relativePath /> <!-- lookup parent from repository -->
</parent>
<dependencies>
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter</artifactId>
	</dependency>
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-test</artifactId>
		<scope>test</scope>
	</dependency>
	<dependency>
		<groupId>org.mybatis.spring.boot</groupId>
		<artifactId>mybatis-spring-boot-starter</artifactId>
		<version>1.1.1</version>
	</dependency>
	<dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
		<version>5.1.21</version>
	</dependency>
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-web</artifactId>
	</dependency>
</dependencies>

配置文件引入

spring.datasource.url=jdbc:mysql://localhost:3306/testsys?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&serverTimezone=Asia/Shanghai&useSSL=false
	spring.datasource.username=root
	spring.datasource.password=admin
	spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

、Mapper代码

public interface UserMapper {
	@Select("SELECT * FROM USERS WHERE NAME = #{name}")
	User findByName(@Param("name") String name);
	@Insert("INSERT INTO USERS(NAME, AGE) VALUES(#{name}, #{age})")
	int insert(@Param("name") String name, @Param("age") Integer age);
}

启动方式

@ComponentScan(basePackages = "com.xx")
@MapperScan(basePackages = "com.xx.mapper")
@SpringBootApplication
public class App {
	public static void main(String[] args) {
		SpringApplication.run(App.class, args);
	}
}

、springboot整合使用springjpa
pom文件引入依赖

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.2.RELEASE</version>
	</parent>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.21</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
	</dependencies>

创建User实体类

	@Entity(name = "users")
	public class User {
		@Id
		@GeneratedValue
		private Integer id;
		@Column
		private String name;
		@Column
		private Integer age;
	      // ..get/set方法
	}

创建UserDao

public interface UserDao extends JpaRepository<User, Integer> {
}

创建IndexController

@RestController
public class IndexController {
	@Autowired
	private UserDao userDao;
	@RequestMapping("/index")
	public String index(Integer id) {
		User findUser = userDao.findOne(id);
		System.out.println(findUser.getName());
		return "success";
	}
}

启动项目

@ComponentScan(basePackages = { "com.xx" })
@EnableJpaRepositories(basePackages = "com.xx.dao")
@EnableAutoConfiguration
@EntityScan(basePackages = "com.xx.entity")
public class App {
	public static void main(String[] args) {
		SpringApplication.run(App.class, args);
	}
}

springboot整合多数据源
配置文件中新增两个数据源

spring.datasource.test1.driverClassName = com.mysql.jdbc.Driver
spring.datasource.test1.url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8
spring.datasource.test1.username = root
spring.datasource.test1.password = root

spring.datasource.test2.driverClassName = com.mysql.jdbc.Driver
spring.datasource.test2.url = jdbc:mysql://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8
spring.datasource.test2.username = root
spring.datasource.test2.password = root

配置文件中新增两个数据源

@Configuration // 注册到springboot容器中
@MapperScan(basePackages = "com.xx.user1", sqlSessionFactoryRef = "test1SqlSessionFactory")
public class DataSource1Config {


@Bean(name = "test1DataSource")
@Primary
@ConfigurationProperties(prefix = "spring.datasource.test1")
public DataSource testDataSource() {
	return DataSourceBuilder.create().build();
}


@Bean(name = "test1SqlSessionFactory")
@Primary
public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource)
		throws Exception {
	SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
			bean.setDataSource(dataSource);
	//		bean.setMapperLocations(
	//				new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/test1/*.xml"));
			return bean.getObject();
		}


@Bean(name = "test1TransactionManager")
@Primary
public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) {
	return new DataSourceTransactionManager(dataSource);
}

@Bean(name = "test1SqlSessionTemplate")
public SqlSessionTemplate testSqlSessionTemplate(
		@Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
	return new SqlSessionTemplate(sqlSessionFactory);
}

}

创建分包Mapper

public interface User1Mapper {
	@Insert("insert into users values(null,#{name},#{age});")
	public int addUser(@Param("name") String name, @Param("age") Integer age);
}
4.4.3启动项目
@ComponentScan(basePackages = "com.xx")
@EnableAutoConfiguration
public class App {
	public static void main(String[] args) {
		SpringApplication.run(App.class, args);
	}
}

No qualifying bean of type [javax.sql.DataSource] is defined: expected single matching bean but found 2: test1DataSource,test2DataSource

事物管理

springboot整合事物管理
springboot默认集成事物,只主要在方法上加上@Transactional即可
SpringBoot分布式事物管理
使用springboot+jta+atomikos 分布式事物管理
新增配置文件信息

	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-jta-atomikos</artifactId>
	</dependency>

新增配置文件信息

Mysql 1

mysql.datasource.test.url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8
mysql.datasource.test.username = root
mysql.datasource.test.password = root

mysql.datasource.test.minPoolSize = 3
mysql.datasource.test.maxPoolSize = 25
mysql.datasource.test.maxLifetime = 20000
mysql.datasource.test.borrowConnectionTimeout = 30
mysql.datasource.test.loginTimeout = 30
mysql.datasource.test.maintenanceInterval = 60
mysql.datasource.test.maxIdleTime = 60
mysql.datasource.test.testQuery = select 1

Mysql 2

mysql.datasource.test2.url =jdbc:mysql://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8
mysql.datasource.test2.username =root
mysql.datasource.test2.password =root

mysql.datasource.test2.minPoolSize = 3
mysql.datasource.test2.maxPoolSize = 25
mysql.datasource.test2.maxLifetime = 20000
mysql.datasource.test2.borrowConnectionTimeout = 30
mysql.datasource.test2.loginTimeout = 30
mysql.datasource.test2.maintenanceInterval = 60
mysql.datasource.test2.maxIdleTime = 60
mysql.datasource.test2.testQuery = select 1

读取配置文件信息

package com.xx.config;

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "mysql.datasource.test")
public class DBConfig1 {

private String url;
private String username;
private String password;
private int minPoolSize;
private int maxPoolSize;
private int maxLifetime;
private int borrowConnectionTimeout;
private int loginTimeout;
private int maintenanceInterval;
private int maxIdleTime;
private String testQuery;

}
package com.xx.config;

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "mysql.datasource.test1")
public class DBConfig2 {

private String url;
private String username;
private String password;
private int minPoolSize;
private int maxPoolSize;
private int maxLifetime;
private int borrowConnectionTimeout;
private int loginTimeout;
private int maintenanceInterval;
private int maxIdleTime;
private String testQuery;

}

创建多数据源

@Configuration
// basePackages 最好分开配置 如果放在同一个文件夹可能会报错
@MapperScan(basePackages = "com.xx.test01", sqlSessionTemplateRef = "testSqlSessionTemplate")
public class TestMyBatisConfig1 {

// 配置数据源
@Primary
@Bean(name = "testDataSource")
public DataSource testDataSource(DBConfig1 testConfig) throws SQLException {
	MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();
	mysqlXaDataSource.setUrl(testConfig.getUrl());
	mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);
	mysqlXaDataSource.setPassword(testConfig.getPassword());
	mysqlXaDataSource.setUser(testConfig.getUsername());
	mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

	AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();
	xaDataSource.setXaDataSource(mysqlXaDataSource);
	xaDataSource.setUniqueResourceName("testDataSource");

	xaDataSource.setMinPoolSize(testConfig.getMinPoolSize());
	xaDataSource.setMaxPoolSize(testConfig.getMaxPoolSize());
	xaDataSource.setMaxLifetime(testConfig.getMaxLifetime());
	xaDataSource.setBorrowConnectionTimeout(testConfig.getBorrowConnectionTimeout());
	xaDataSource.setLoginTimeout(testConfig.getLoginTimeout());
	xaDataSource.setMaintenanceInterval(testConfig.getMaintenanceInterval());
	xaDataSource.setMaxIdleTime(testConfig.getMaxIdleTime());
	xaDataSource.setTestQuery(testConfig.getTestQuery());
	return xaDataSource;
}

@Bean(name = "testSqlSessionFactory")
public SqlSessionFactory testSqlSessionFactory(@Qualifier("testDataSource") DataSource dataSource)
		throws Exception {
	SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
	bean.setDataSource(dataSource);
	return bean.getObject();
}

@Bean(name = "testSqlSessionTemplate")
public SqlSessionTemplate testSqlSessionTemplate(
		@Qualifier("testSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
	return new SqlSessionTemplate(sqlSessionFactory);
}

}

package com.xx.datasource;

import java.sql.SQLException;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.atomikos.jdbc.AtomikosDataSourceBean;
import com.xx.config.DBConfig1;
import com.mysql.jdbc.jdbc2.optional.MysqlXADataSource;

@Configuration
// basePackages 最好分开配置 如果放在同一个文件夹可能会报错
@MapperScan(basePackages = "com.xx.test02", sqlSessionTemplateRef = "test2SqlSessionTemplate")
public class TestMyBatisConfig2 {

// 配置数据源
@Bean(name = "test2DataSource")
public DataSource testDataSource(DBConfig1 testConfig) throws SQLException {
	MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource();
	mysqlXaDataSource.setUrl(testConfig.getUrl());
	mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);
	mysqlXaDataSource.setPassword(testConfig.getPassword());
	mysqlXaDataSource.setUser(testConfig.getUsername());
	mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true);

	AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean();
	xaDataSource.setXaDataSource(mysqlXaDataSource);
	xaDataSource.setUniqueResourceName("test2DataSource");

	xaDataSource.setMinPoolSize(testConfig.getMinPoolSize());
	xaDataSource.setMaxPoolSize(testConfig.getMaxPoolSize());
	xaDataSource.setMaxLifetime(testConfig.getMaxLifetime());
	xaDataSource.setBorrowConnectionTimeout(testConfig.getBorrowConnectionTimeout());
	xaDataSource.setLoginTimeout(testConfig.getLoginTimeout());
	xaDataSource.setMaintenanceInterval(testConfig.getMaintenanceInterval());
	xaDataSource.setMaxIdleTime(testConfig.getMaxIdleTime());
	xaDataSource.setTestQuery(testConfig.getTestQuery());
	return xaDataSource;
}

@Bean(name = "test2SqlSessionFactory")
public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource)
		throws Exception {
	SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
	bean.setDataSource(dataSource);
	return bean.getObject();
}

@Bean(name = "test2SqlSessionTemplate")
public SqlSessionTemplate testSqlSessionTemplate(
		@Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
	return new SqlSessionTemplate(sqlSessionFactory);
}

}

启动加载配置

@EnableConfigurationProperties(value = { DBConfig1.class, DBConfig2.class })

日志管理

使用log4j记录日志
新建log4j配置文件

#log4j.rootLogger=CONSOLE,info,error,DEBUG
log4j.rootLogger=info,error,CONSOLE,DEBUG
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender     
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout     
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n     
log4j.logger.info=info
log4j.appender.info=org.apache.log4j.DailyRollingFileAppender
log4j.appender.info.layout=org.apache.log4j.PatternLayout     
log4j.appender.info.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n  
log4j.appender.info.datePattern='.'yyyy-MM-dd
log4j.appender.info.Threshold = info   
log4j.appender.info.append=true   
#log4j.appender.info.File=/home/admin/pms-api-services/logs/info/api_services_info
log4j.appender.info.File=/Users/dddd/Documents/testspace/pms-api-services/logs/info/api_services_info
log4j.logger.error=error  
log4j.appender.error=org.apache.log4j.DailyRollingFileAppender
log4j.appender.error.layout=org.apache.log4j.PatternLayout     
log4j.appender.error.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n  
log4j.appender.error.datePattern='.'yyyy-MM-dd
log4j.appender.error.Threshold = error   
log4j.appender.error.append=true   
#log4j.appender.error.File=/home/admin/pms-api-services/logs/error/api_services_error
log4j.appender.error.File=/Users/dddd/Documents/testspace/pms-api-services/logs/error/api_services_error
log4j.logger.DEBUG=DEBUG
log4j.appender.DEBUG=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DEBUG.layout=org.apache.log4j.PatternLayout     
log4j.appender.DEBUG.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n  
log4j.appender.DEBUG.datePattern='.'yyyy-MM-dd
log4j.appender.DEBUG.Threshold = DEBUG   
log4j.appender.DEBUG.append=true   
#log4j.appender.DEBUG.File=/home/admin/pms-api-services/logs/debug/api_services_debug
log4j.appender.DEBUG.File=/Users/dddd/Documents/testspace/pms-api-services/logs/debug/api_services_debug

使用AOP统一处理Web请求日志
1POM文件新增依赖

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

POM文件新增依赖

@Aspect
@Component
public class WebLogAspect {
	private Logger logger = LoggerFactory.getLogger(getClass());
	@Pointcut("execution(public * com.xxx.controller..*.*(..))")
	public void webLog() {
	}
	@Before("webLog()")
	public void doBefore(JoinPoint joinPoint) throws Throwable {
		// 接收到请求,记录请求内容
		ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
		HttpServletRequest request = attributes.getRequest();
		// 记录下请求内容
		logger.info("URL : " + request.getRequestURL().toString());
		logger.info("HTTP_METHOD : " + request.getMethod());
		logger.info("IP : " + request.getRemoteAddr());
		Enumeration<String> enu = request.getParameterNames();
		while (enu.hasMoreElements()) {
			String name = (String) enu.nextElement();
			logger.info("name:{},value:{}", name, request.getParameter(name));
		}
	}
	@AfterReturning(returning = "ret", pointcut = "webLog()")
	public void doAfterReturning(Object ret) throws Throwable {
		// 处理完请求,返回内容
		logger.info("RESPONSE : " + ret);
	}
}

缓存支持

注解配置与EhCache使用
pom文件引入

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

新建ehcache.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
	updateCheck="false">
	<diskStore path="java.io.tmpdir/Tmp_EhCache" />

	<!-- 默认配置 -->
	<defaultCache maxElementsInMemory="5000" eternal="false"
		timeToIdleSeconds="120" timeToLiveSeconds="120"
		memoryStoreEvictionPolicy="LRU" overflowToDisk="false" />

	<cache name="baseCache" maxElementsInMemory="10000"
		maxElementsOnDisk="100000" />

</ehcache>

配置信息介绍

代码使用Cacheable

@CacheConfig(cacheNames = "baseCache")
public interface UserMapper {
	@Select("select * from users where name=#{name}")
	@Cacheable
	UserEntity findName(@Param("name") String name);
}

清除缓存

@Autowired
private CacheManager cacheManager;
@RequestMapping("/remoKey")
public void remoKey() {
	cacheManager.getCache("baseCache").clear();
}

使用Redis做集中式缓存

其他内容

使用@Scheduled创建定时任务

在Spring Boot的主类中加入@EnableScheduling注解,启用定时任务的配置

@Component
public class ScheduledTasks {
    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
    @Scheduled(fixedRate = 5000)
    public void reportCurrentTime() {
        System.out.println("现在时间:" + dateFormat.format(new Date()));
    }
}

使用@Async实现异步调用

启动加上@EnableAsync ,需要执行异步方法上加入 @Async

自定义参数
配置文件值

name=xx.com

配置文件值

	@Value("${name}")
	private String name;
@ResponseBody
	@RequestMapping("/getValue")
	public String getValue() {
		return name;
	}

多环境配置

spring.profiles.active=pre
application-dev.properties:开发环境
application-test.properties:测试环境
application-prod.properties:生产环境
8.5、修改端口号
server.port=8888 
server.context-path=/xx
8.6、SpringBoot yml 使用
创建application.yml
server:
  port:  8090
  context-path: /xxx

发布打包

使用mvn package 打包
使用java –jar 包名
如果报错没有主清单,在pom文件中新增

<build>
	<plugins>
		<plugin>
			<groupId>org.apache.maven.plugins</groupId>
			<artifactId>maven-compiler-plugin</artifactId>
			<configuration>
				<source>1.8</source>
				<target>1.8</target>
			</configuration>
		</plugin>
		<plugin>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-maven-plugin</artifactId>
			<configuration>
				<maimClass>com.xx.app.App</maimClass>
			</configuration>
			<executions>
				<execution>
					<goals>
						<goal>repackage</goal>
					</goals>
				</execution>
			</executions>
		</plugin>
	</plugins>
</build>
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