增加项目说明

2019-01-08 17:02:55 +08:00
parent f1594c6de7
commit 48039923fe
61 changed files with 3345 additions and 100 deletions
--- a/spring-boot/spring-boot-druid-mybatis/README.md
+++ b/spring-boot/spring-boot-druid-mybatis/README.md
@ -0,0 +1,196 @@
+# spring boot 整合 druid+mybatis
+
+## 一、说明
+
+#### 1.1 项目结构
+
+1. 项目查询用的表对应的建表语句放置在resources的sql文件夹下；
+
+2. 为了使用druid控制台的功能，项目以web的方式构建。
+
+![spring-boot-servlet](D:\spring-samples-for-all\pictures\spring-boot-druid-mybatis.png)
+
+#### 1.2 项目主要依赖
+
+需要说明的是按照spring 官方对应自定义的starter 命名规范的推荐：
+
+- 官方的starter命名：spring-boot-starter-XXXX
+- 其他第三方starter命名：XXXX-spring-boot-starte
+
+所以mybatis的starter命名为mybatis-spring-boot-starter，如果有自定义starter需求，也需要按照此命名规则进行命名。
+
+```xml
+<dependency>
+    <groupId>org.mybatis.spring.boot</groupId>
+    <artifactId>mybatis-spring-boot-starter</artifactId>
+    <version>1.3.2</version>
+</dependency>
+<!--引入mysql驱动-->
+<dependency>
+    <groupId>mysql</groupId>
+    <artifactId>mysql-connector-java</artifactId>
+    <version>8.0.13</version>
+</dependency>
+<!--druid 依赖-->
+<dependency>
+    <groupId>com.alibaba</groupId>
+    <artifactId>druid-spring-boot-starter</artifactId>
+    <version>1.1.10</version>
+</dependency>
+```
+
+spring boot 与 mybatis 版本的对应关系：
+
+| MyBatis-Spring-Boot-Starter | [MyBatis-Spring](http://www.mybatis.org/spring/index.html#Requirements) | Spring Boot   |
+| --------------------------- | ------------------------------------------------------------ | ------------- |
+| **1.3.x (1.3.1)**           | 1.3 or higher                                                | 1.5 or higher |
+| **1.2.x (1.2.1)**           | 1.3 or higher                                                | 1.4 or higher |
+| **1.1.x (1.1.1)**           | 1.3 or higher                                                | 1.3 or higher |
+| **1.0.x (1.0.2)**           | 1.2 or higher                                                | 1.3 or higher |
+
+
+
+## 二、整合 druid + mybatis
+
+#### 2.1 在application.yml 中配置数据源
+
+本用例采用druid作为数据库连接池，虽然druid性能略逊于Hikari，但是提供了更为全面的监控管理，可以按照实际需求选用druid或者Hikari。（关于Hikari数据源的配置可以参考[spring-boot-mbatis项目](https://github.com/heibaiying/spring-samples-for-all/tree/master/spring-boot/spring-boot-mybatis)）
+
+```yaml
+spring:
+  datasource:
+    url: jdbc:mysql://127.0.0.1:3306/mysql?characterEncoding=UTF-8&serverTimezone=UTC&useSSL=false
+    username: root
+    password: root
+    driver-class-name: com.mysql.cj.jdbc.Driver
+
+    # 使用 druid 作为连接池  更多配置的说明可以参见 druid starter 中文文档 https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter
+    type: com.alibaba.druid.pool.DruidDataSource
+    druid:
+      # 初始化时建立物理连接的个数。初始化发生在显示调用init方法，或者第一次getConnection时
+      initialSize: 5
+      # 最小连接池数量
+      minIdle: 5
+      # 最大连接池数量
+      maxActive: 10
+      # 获取连接时最大等待时间，单位毫秒。配置了maxWait之后，缺省启用公平锁，并发效率会有所下降，如果需要可以通过配置useUnfairLock属性为true使用非公平锁。
+      maxWait: 60000
+      # Destroy线程会检测连接的间隔时间，如果连接空闲时间大于等于minEvictableIdleTimeMillis则关闭物理连接。
+      timeBetweenEvictionRunsMillis: 60000
+      # 连接保持空闲而不被驱逐的最小时间
+      minEvictableIdleTimeMillis: 300000
+      # 用来检测连接是否有效的sql 因数据库方言而差, 例如 oracle 应该写成 SELECT 1 FROM DUAL
+      validationQuery: SELECT 1
+      # 建议配置为true，不影响性能，并且保证安全性。申请连接的时候检测，如果空闲时间大于timeBetweenEvictionRunsMillis，执行validationQuery检测连接是否有效。
+      testWhileIdle: true
+      # 申请连接时执行validationQuery检测连接是否有效，做了这个配置会降低性能。
+      testOnBorrow: false
+      # 归还连接时执行validationQuery检测连接是否有效，做了这个配置会降低性能。
+      testOnReturn: false
+      # 是否自动回收超时连接
+      removeAbandoned: true
+      # 超时时间(以秒数为单位)
+      remove-abandoned-timeout: 180
+
+      # druid 监控的配置 如果不使用 druid 的监控功能的话 以下配置就不是必须的
+      # 本项目监控台访问地址: http://localhost:8080/druid/login.html
+
+      # WebStatFilter用于采集web-jdbc关联监控的数据。
+      # 更多配置可参见: https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_%E9%85%8D%E7%BD%AEWebStatFilter
+      web-stat-filter:
+        # 是否开启 WebStatFilter 默认是true
+        enabled: true
+        # 需要拦截的url
+        url-pattern: /*
+        # 排除静态资源的请求
+        exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
+
+      # Druid内置提供了一个StatViewServlet用于展示Druid的统计信息。
+      # 更多配置可参见:https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatViewServlet%E9%85%8D%E7%BD%AE
+      stat-view-servlet:
+        #是否启用StatViewServlet 默认值true
+        enabled: true
+        # 需要拦截的url
+        url-pattern: /druid/*
+        # 允许清空统计数据
+        reset-enable: true
+        login-username: druid
+        login-password: druid
+
+
+
+# mybatis 相关配置
+mybatis:
+    configuration:
+      # 当没有为参数提供特定的 JDBC 类型时，为空值指定 JDBC 类型。
+      # oracle数据库建议配置为JdbcType.NULL, 默认是Other
+      jdbc-type-for-null: 'null'
+      # 是否打印sql语句 调试的时候可以开启
+log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
+```
+
+#### 2.2  新建查询接口和controller
+
+```java
+@Mapper
+public interface ProgrammerDao {
+
+
+    @Select("select * from programmer")
+    List<Programmer> selectAll();
+
+    @Insert("insert into programmer (name, age, salary, birthday) VALUES (#{name}, #{age}, #{salary}, #{birthday})")
+    void save(Programmer programmer);
+
+    @Select("select * from programmer where name = #{id}")
+    Programmer selectById(int id);
+
+    @Update("update programmer set name=#{name},age=#{age},salary=#{salary},birthday=#{birthday} where id=#{id}")
+    int modify(Programmer programmer);
+
+    @Delete(" delete from programmer where id = #{id}")
+    void delete(int id);
+}
+```
+
+```xml
+@RestController
+public class ProgrammerController {
+
+    @Autowired
+    private ProgrammerDao programmerDao;
+
+    @GetMapping("/programmers")
+    public List<Programmer> get() {
+        return programmerDao.selectAll();
+    }
+}
+```
+
+#### 2.3 关于druid监控数据的外部化调用
+
+```java
+/**
+ * @author : heibaiying
+ * @description :在 Spring Boot 中可以通过 HTTP 接口将 Druid 监控数据以JSON 的形式暴露出去，
+ * 实际使用中你可以根据你的需要自由地对监控数据、暴露方式进行扩展。
+ */
+
+@RestController
+public class DruidStatController {
+
+    @GetMapping("/stat")
+    public Object druidStat() {
+        // DruidStatManagerFacade#getDataSourceStatDataList 该方法可以获取所有数据源的监控数据
+        return DruidStatManagerFacade.getInstance().getDataSourceStatDataList();
+    }
+}
+```
+
+![druid-status](D:\spring-samples-for-all\pictures\druid-status.png)
+
+
+
+#### 2.4 druid 控制台的使用，默认访问地址 http://localhost:8080/druid/login.html
+
+![spring-boot-druid 控制台](D:\spring-samples-for-all\pictures\spring-boot-druid 控制台.png)
--- a/spring-boot/spring-boot-druid-mybatis/src/main/resources/application.yml
+++ b/spring-boot/spring-boot-druid-mybatis/src/main/resources/application.yml
@ -1,71 +1,70 @@
 spring:
  datasource:
-    url: jdbc:mysql://127.0.0.1:3306/mysql?useUnicode=true&characterEncoding=utf-8
+    url: jdbc:mysql://127.0.0.1:3306/mysql?characterEncoding=UTF-8&serverTimezone=UTC&useSSL=false
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver

-    # ʹ<EFBFBD><EFBFBD> druid <EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD>  <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>˵<EFBFBD><CBB5><EFBFBD><EFBFBD><EFBFBD>Բμ<D4B2> druid starter <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD> https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter
+    # 使用 druid 作为连接池  更多配置的说明可以参见 druid starter 中文文档 https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter
    type: com.alibaba.druid.pool.DruidDataSource
    druid:
-      # <EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵĸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>init<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD>һ<EFBFBD><EFBFBD>getConnectionʱ
+      # 初始化时建立物理连接的个数。初始化发生在显示调用init方法，或者第一次getConnection时
      initialSize: 5
-      # <EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+      # 最小连接池数量
      minIdle: 5
-      # <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+      # 最大连接池数量
      maxActive: 10
-      # <EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȴ<EFBFBD>ʱ<EFBFBD>䣬<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>maxWait֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȱʡ<EFBFBD><EFBFBD><EFBFBD>ù<EFBFBD>ƽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ʻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>½<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>useUnfairLock<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊtrueʹ<EFBFBD>÷ǹ<EFBFBD>ƽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+      # 获取连接时最大等待时间，单位毫秒。配置了maxWait之后，缺省启用公平锁，并发效率会有所下降，如果需要可以通过配置useUnfairLock属性为true使用非公平锁。
      maxWait: 60000
-      # Destroy<EFBFBD>̻߳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵļ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӿ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>minEvictableIdleTimeMillis<EFBFBD><EFBFBD><EFBFBD>ر<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD>
+      # Destroy线程会检测连接的间隔时间，如果连接空闲时间大于等于minEvictableIdleTimeMillis则关闭物理连接。
      timeBetweenEvictionRunsMillis: 60000
-      # <EFBFBD><EFBFBD><EFBFBD>ӱ<EFBFBD><EFBFBD>ֿ<EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Сʱ<EFBFBD><EFBFBD>
+      # 连接保持空闲而不被驱逐的最小时间
      minEvictableIdleTimeMillis: 300000
-      # <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD>sql <20><><EFBFBD><EFBFBD><EFBFBD>ݿⷽ<DDBF>Զ<EFBFBD><D4B6><EFBFBD>, <20><><EFBFBD><EFBFBD> oracle Ӧ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD> SELECT 1 FROM DUAL
+      # 用来检测连接是否有效的sql 因数据库方言而差, 例如 oracle 应该写成 SELECT 1 FROM DUAL
      validationQuery: SELECT 1
-      # <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊtrue<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ұ<EFBFBD>֤<EFBFBD><EFBFBD>ȫ<EFBFBD>ԡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>timeBetweenEvictionRunsMillis<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>validationQuery<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD>
+      # 建议配置为true，不影响性能，并且保证安全性。申请连接的时候检测，如果空闲时间大于timeBetweenEvictionRunsMillis，执行validationQuery检测连接是否有效。
      testWhileIdle: true
-      # <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱִ<EFBFBD><EFBFBD>validationQuery<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ûή<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܡ<EFBFBD>
+      # 申请连接时执行validationQuery检测连接是否有效，做了这个配置会降低性能。
      testOnBorrow: false
-      # <EFBFBD>黹<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱִ<EFBFBD><EFBFBD>validationQuery<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ûή<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܡ<EFBFBD>
+      # 归还连接时执行validationQuery检测连接是否有效，做了这个配置会降低性能。
      testOnReturn: false
-      # <EFBFBD>Ƿ<EFBFBD><EFBFBD>Զ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ճ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+      # 是否自动回收超时连接
      removeAbandoned: true
-      # <EFBFBD><EFBFBD>ʱʱ<EFBFBD><EFBFBD>(<28><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA>λ)
+      # 超时时间(以秒数为单位)
      remove-abandoned-timeout: 180

-      # druid <EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9> druid <20>ļ<EFBFBD><C4BC>ع<EFBFBD><D8B9>ܵĻ<DCB5> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>þͲ<C3BE><CDB2>Ǳ<EFBFBD><C7B1><EFBFBD><EFBFBD><EFBFBD>
-      # <EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>̨<EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>ַ: http://localhost:8080/druid/login.html
+      # druid 监控的配置 如果不使用 druid 的监控功能的话 以下配置就不是必须的
+      # 本项目监控台访问地址: http://localhost:8080/druid/login.html

-      # WebStatFilter<EFBFBD><EFBFBD><EFBFBD>ڲɼ<EFBFBD>web-jdbc<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD>
-      # <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿɲμ<EFBFBD>: https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_%E9%85%8D%E7%BD%AEWebStatFilter
+      # WebStatFilter用于采集web-jdbc关联监控的数据。
+      # 更多配置可参见: https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_%E9%85%8D%E7%BD%AEWebStatFilter
      web-stat-filter:
-        # <EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> WebStatFilter Ĭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>true
+        # 是否开启 WebStatFilter 默认是true
        enabled: true
-        # <EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>url
+        # 需要拦截的url
        url-pattern: /*
-        # <EFBFBD>ų<EFBFBD><EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+        # 排除静态资源的请求
        exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"

-      # Druid<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>StatViewServlet<EFBFBD><EFBFBD><EFBFBD><EFBFBD>չʾDruid<EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>
-      # <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿɲμ<EFBFBD>:https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatViewServlet%E9%85%8D%E7%BD%AE
+      # Druid内置提供了一个StatViewServlet用于展示Druid的统计信息。
+      # 更多配置可参见:https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatViewServlet%E9%85%8D%E7%BD%AE
      stat-view-servlet:
-        #<EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>StatViewServlet Ĭ<EFBFBD><EFBFBD>ֵtrue
+        #是否启用StatViewServlet 默认值true
        enabled: true
-        # <EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>url
+        # 需要拦截的url
        url-pattern: /druid/*
-        # <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+        # 允许清空统计数据
        reset-enable: true
        login-username: druid
        login-password: druid



-# mybatis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+# mybatis 相关配置
 mybatis:
    configuration:
-      # <EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD>ض<EFBFBD><EFBFBD><EFBFBD> JDBC <20><><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>Ϊ<EFBFBD><CEAA>ֵָ<D6B5><D6B8> JDBC <EFBFBD><EFBFBD><EFBFBD>͡<EFBFBD>
-      # oracle<EFBFBD><EFBFBD><EFBFBD>ݿ⽨<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ΪJdbcType.NULL, Ĭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Other
+      # 当没有为参数提供特定的 JDBC 类型时，为空值指定 JDBC 类型。
+      # oracle数据库建议配置为JdbcType.NULL, 默认是Other
      jdbc-type-for-null: 'null'
-      # <EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>ӡsql<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD>Ե<EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD>Կ<EFBFBD><D4BF><EFBFBD>
-      log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
-
+      # 是否打印sql语句 调试的时候可以开启
+log-impl: org.apache.ibatis.logging.stdout.StdOutImpl