diff --git a/druid-spring-boot-example/druid-spring-boot-mybatis-example/pom.xml b/druid-spring-boot-example/druid-spring-boot-mybatis-example/pom.xml
index 8a9d4a5..9c33ce1 100644
--- a/druid-spring-boot-example/druid-spring-boot-mybatis-example/pom.xml
+++ b/druid-spring-boot-example/druid-spring-boot-mybatis-example/pom.xml
@@ -23,10 +23,6 @@
                 </exclusion>
             </exclusions>
         </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-properties-migrator</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-aop</artifactId>
diff --git a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/java/com/github/trang/druid/example/mybatis/DruidMybatisApplication.java b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/java/com/github/trang/druid/example/mybatis/DruidMybatisApplication.java
index bc9a7cc..e64e70a 100644
--- a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/java/com/github/trang/druid/example/mybatis/DruidMybatisApplication.java
+++ b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/java/com/github/trang/druid/example/mybatis/DruidMybatisApplication.java
@@ -1,6 +1,10 @@
 package com.github.trang.druid.example.mybatis;
 
+import com.github.trang.druid.example.mybatis.mapper.CityMapper;
+import com.google.gson.Gson;
+import lombok.extern.slf4j.Slf4j;
 import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.CommandLineRunner;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -12,6 +16,7 @@ import org.springframework.boot.autoconfigure.SpringBootApplication;
  */
 @SpringBootApplication
 @MapperScan("com.github.trang.druid.example.mapper")
+@Slf4j
 public class DruidMybatisApplication implements CommandLineRunner {
 
     public static void main(String[] args) {
@@ -19,9 +24,15 @@ public class DruidMybatisApplication implements CommandLineRunner {
         SpringApplication.run(DruidMybatisApplication.class, args);
     }
 
+    @Autowired
+    private CityMapper cityRepository;
+
     @Override
     public void run(String... args) {
-
+        Gson gson = new Gson();
+        cityRepository.findAll().stream()
+                .map(gson::toJson)
+                .forEach(log::info);
     }
 
 }
\ No newline at end of file
diff --git a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/java/com/github/trang/druid/example/mybatis/config/DynamicDataSource.java b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/java/com/github/trang/druid/example/mybatis/config/DynamicDataSource.java
index bfa061d..734ec14 100644
--- a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/java/com/github/trang/druid/example/mybatis/config/DynamicDataSource.java
+++ b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/java/com/github/trang/druid/example/mybatis/config/DynamicDataSource.java
@@ -1,6 +1,7 @@
 package com.github.trang.druid.example.mybatis.config;
 
 import lombok.Getter;
+import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
 
@@ -18,15 +19,12 @@ import java.util.concurrent.atomic.AtomicInteger;
  */
 @Slf4j
 @Getter
+@RequiredArgsConstructor
 public class DynamicDataSource extends AbstractRoutingDataSource {
 
     private final AtomicInteger count = new AtomicInteger();
     private final Map<String, DataSource> targetDataSources;
 
-    public DynamicDataSource(Map<String, DataSource> targetDataSources) {
-        this.targetDataSources = targetDataSources;
-    }
-
     /**
      * 基于轮询算法指定实际的数据源
      *
diff --git a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/resources/application.yml b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/resources/application.yml
index 93dc969..7c34437 100644
--- a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/resources/application.yml
+++ b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/main/resources/application.yml
@@ -27,6 +27,7 @@ spring:
     password: 123456
     schema: classpath:import.sql
     druid:
+      max-wait: 30000
       query-timeout: 10
       validation-query: SELECT 1
       use-global-data-source-stat: true
diff --git a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/BaseTest.java b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/BaseTest.java
index 55edfa6..0897c83 100644
--- a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/BaseTest.java
+++ b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/BaseTest.java
@@ -2,7 +2,10 @@ package com.github.trang.druid.example.mybatis.test.coveralls;
 
 import com.github.trang.druid.example.mybatis.DruidMybatisApplication;
 import com.github.trang.druid.example.mybatis.mapper.CityMapper;
+import com.google.gson.Gson;
 import org.junit.runner.RunWith;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.junit4.SpringRunner;
@@ -16,6 +19,9 @@ import org.springframework.test.context.junit4.SpringRunner;
 @SpringBootTest(classes = DruidMybatisApplication.class)
 public abstract class BaseTest {
 
+    protected static final Logger log = LoggerFactory.getLogger(BaseTest.class.getSimpleName());
+    protected Gson gson = new Gson();
+
     @Autowired(required = false)
     protected CityMapper cityMapper;
 
diff --git a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/DynamicDataSourceTests.java b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/DynamicDataSourceTests.java
index 379aead..63be24c 100644
--- a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/DynamicDataSourceTests.java
+++ b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/DynamicDataSourceTests.java
@@ -32,8 +32,8 @@ public class DynamicDataSourceTests extends BaseTest {
 
     @Test
     public void testMasterDataSource() {
-        assertEquals(1, masterDataSource.getInitialSize());
-        assertEquals(1, masterDataSource.getMinIdle());
+        assertEquals(0, masterDataSource.getInitialSize());
+        assertEquals(0, masterDataSource.getMinIdle());
         assertEquals(50, masterDataSource.getMaxActive());
         assertEquals(30000, masterDataSource.getMaxWait());
         assertEquals(60000, masterDataSource.getTimeBetweenEvictionRunsMillis());
@@ -49,8 +49,8 @@ public class DynamicDataSourceTests extends BaseTest {
 
     @Test
     public void testSlaveDataSource() {
-        assertEquals(1, slaveDataSource.getInitialSize());
-        assertEquals(1, slaveDataSource.getMinIdle());
+        assertEquals(0, slaveDataSource.getInitialSize());
+        assertEquals(0, slaveDataSource.getMinIdle());
         assertEquals(25, slaveDataSource.getMaxActive());
         assertEquals(30000, slaveDataSource.getMaxWait());
         assertEquals(60000, slaveDataSource.getTimeBetweenEvictionRunsMillis());
diff --git a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/MyBatisTests.java b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/MyBatisTests.java
index cbfa192..435b404 100644
--- a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/MyBatisTests.java
+++ b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/MyBatisTests.java
@@ -5,6 +5,7 @@ import org.junit.Assert;
 import org.junit.Test;
 
 import java.util.List;
+import java.util.Optional;
 
 /**
  * MyBatis 测试
@@ -15,14 +16,16 @@ public class MyBatisTests extends BaseTest {
 
     @Test
     public void testOne() {
-        City city = cityMapper.findById(1L);
-        System.out.println(city);
+        Optional.ofNullable(cityMapper.findById(1L))
+                .ifPresent(gson::toJson);
     }
 
     @Test
     public void testAll() {
         List<City> cities = cityMapper.findAll();
-        System.out.println(cities);
+        cities.stream()
+                .map(gson::toJson)
+                .forEach(log::info);
         Assert.assertEquals(5, cities.size());
     }
 
diff --git a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/SingleDataSourceTests.java b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/SingleDataSourceTests.java
index f449733..94bb331 100644
--- a/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/SingleDataSourceTests.java
+++ b/druid-spring-boot-example/druid-spring-boot-mybatis-example/src/test/java/com/github/trang/druid/example/mybatis/test/coveralls/SingleDataSourceTests.java
@@ -20,9 +20,9 @@ public class SingleDataSourceTests extends BaseTest {
 
     @Test
     public void testSingleDataSource() {
-        assertEquals(1, dataSource.getInitialSize());
-        assertEquals(1, dataSource.getMinIdle());
-        assertEquals(10, dataSource.getMaxActive());
+        assertEquals(0, dataSource.getInitialSize());
+        assertEquals(0, dataSource.getMinIdle());
+        assertEquals(8, dataSource.getMaxActive());
         assertEquals(30000, dataSource.getMaxWait());
         assertEquals(60000, dataSource.getTimeBetweenEvictionRunsMillis());
         assertEquals(1800000, dataSource.getMinEvictableIdleTimeMillis());
@@ -31,7 +31,7 @@ public class SingleDataSourceTests extends BaseTest {
         assertEquals(true, dataSource.isTestWhileIdle());
         assertEquals(false, dataSource.isTestOnBorrow());
         assertEquals(false, dataSource.isTestOnReturn());
-        assertEquals(20, dataSource.getMaxPoolPreparedStatementPerConnectionSize());
+        assertEquals(10, dataSource.getMaxPoolPreparedStatementPerConnectionSize());
         assertEquals(true, dataSource.isUseGlobalDataSourceStat());
     }