标签：set 配置文件 数据源配置 ash completed druid数据源 runner art pool
大部分系统都涉及到数据访问，数据库包SQL（关系型数据库）和NOSQL（非关系型数据库），SQL包括：sqlserver，Oracle,Mysql；NOSQL包括：MongoDB和redis。
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency>
spring:
datasource:
url: jdbc:mysql://192.168.1.102:3306/jdbc
username: root
password: 123456
driver-class-name: com.mysql.cj.jdbc.Driver
测试类：测试：
@RunWith(SpringRunner.class) @SpringBootTest public class springbootjdbc { @Autowired DataSource dataSource; @Test public void contextLoads() throws SQLException { System.out.println("---------------"); System.out.println(dataSource.getClass()); Connection connection = dataSource.getConnection(); System.out.println("================="); System.out.println(connection); connection.close(); } }
控制台输出：
---------------
class com.zaxxer.hikari.HikariDataSource
2019-05-03 09:25:32.889 INFO 13768 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2019-05-03 09:25:33.500 INFO 13768 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
=================
HikariProxyConnection@1193939374 wrapping com.mysql.cj.jdbc.ConnectionImpl@dc79225
springboot默认的数据源就是：class com.zaxxer.hikari.HikariDataSource，数据源的相关配置都在DataSourceProperties里面；
我们也可以自己默认数据源：spring.datasource.type可以自定义。
? 1）、runSchemaScripts();运行建表语句；
? 2）、runDataScripts();运行插入数据的sql语句；
默认只需要将文件命名为：
schema-*.sql、data-*.sql
默认规则：schema.sql，schema-all.sql；
可以使用
schema:
- classpath:department.sql
指定位置
springboot自动配置了JdbcTemplate操作数据库。
@Controller public class jdbc { @Autowired JdbcTemplate jdbcTemplate; @ResponseBody @RequestMapping("/h1") public Map<String, Object> selectAll() { List< Map<String, Object>> maps = jdbcTemplate.queryForList("select *from user "); System.out.println(maps.toString()); return maps.get(0); } }
控制台打印：[{id=1, name=lisi, age=12}, {id=2, name=wangwu, age=13}]
<!-- https://mvnrepository.com/artifact/com.alibaba/druid --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency>
spring:
datasource:
url: jdbc:mysql://192.168.1.102:3306/jdbc
username: root
password: 123456
driver-class-name: com.mysql.cj.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource
#数据源其他配置
initialSize: 5
minIdle: 5
maxActive: 20
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
#配置监控统计拦截的filters，去掉后监控界面sql无法统计，‘wall‘用于防火墙
filters: stat,wall,log4j
maxPoolPreparedStatementPerConnectionSize: 20
useGlobalDataSourceStat: true
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
@Configuration public class druidConfig { @ConfigurationProperties(prefix = "spring.datasource") @Bean public DataSource druid() { return new DruidDataSource(); } }
<dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency>
在之前的测试类中：debug测试：
可以看到和我们之前在配置文件配置的一样。
@Configuration public class druidConfig { @ConfigurationProperties(prefix = "spring.datasource") @Bean public DataSource druid() { return new DruidDataSource(); } // 配置Druid的监控 // 1、配置一个管理后台的Servlet @Bean public ServletRegistrationBean statViewServlet(){ ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*"); Map<String,String> initParams = new HashMap<>(); initParams.put("loginUsername","admin"); initParams.put("loginPassword","123456"); initParams.put("allow",""); //默认就是允许所有访问 initParams.put("deny","192.168.15.21"); bean.setInitParameters(initParams); return bean; } //2、配置一个web监控的filter @Bean public FilterRegistrationBean webStatFilter(){ FilterRegistrationBean bean = new FilterRegistrationBean(); bean.setFilter(new WebStatFilter()); Map<String,String> initParams = new HashMap<>(); initParams.put("exclusions","*.js,*.css,/druid/*"); bean.setInitParameters(initParams); bean.setUrlPatterns(Arrays.asList("/*")); return bean; } }
这样就可以通过后台监控数据源的访问情况了。
输入：
<dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-sta1rter</artifactId> <version>1.3.2</version> </dependency>
? 2）、给数据库建表
? 3）、创建JavaBean
dao层：
@Mapper public interface userMapper { @Select("select *from user where id=#{id}") User selelctById(Integer id); @Delete("delete from user where id=#{id}") Integer delectById(Integer id); @Insert("insert into user(name,age) values(#{name},#{age}) ") User insertUser(User user); @Update("update user set name=#{name}where id=#{id}") Integer updateById(Integer id); }
测试userController:
@RestController public class UserController { @Autowired userMapper usermapper; @RequestMapping("/selectById") public User selectById(){ return usermapper.selelctById(2); } }
测试结果：
配置文件添加：
mybatis: mapper-locations: classpath:mybatis/mapper/*.xml 指定sql映射文件的位置
type-aliases-package: com.springboot.springboot.pojo 指定实体类所在的包
标签：set 配置文件 数据源配置 ash completed druid数据源 runner art pool
原文地址：https://www.cnblogs.com/fastguy/p/10801953.html
