update > optimize MybatisConfigurer

src/main/java/com/company/project/configurer/MybatisConfigurer.java

@@ -4,8 +4,10 @@ import com.github.pagehelper.PageHelper;
 import org.apache.ibatis.plugin.Interceptor;
 import org.apache.ibatis.session.SqlSessionFactory;
 import org.mybatis.spring.SqlSessionFactoryBean;
+import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
 import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Conditional;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
 import org.springframework.core.io.support.ResourcePatternResolver;
@@ -22,52 +24,45 @@ import static com.company.project.core.ProjectConstant.*;
  */
 @Configuration
 public class MybatisConfigurer {
-    @Resource
-    private DataSource dataSource;
 
     @Bean
-    public SqlSessionFactory sqlSessionFactoryBean() throws Exception {
-        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
-        bean.setDataSource(dataSource);
-        bean.setTypeAliasesPackage(MODEL_PACKAGE);
+    public SqlSessionFactory sqlSessionFactoryBean(DataSource dataSource) throws Exception {
+        SqlSessionFactoryBean factory = new SqlSessionFactoryBean();
+        factory.setDataSource(dataSource);
+        factory.setTypeAliasesPackage(MODEL_PACKAGE);
 
-        //分页插件
+        //配置分页插件，详情请查阅官方文档
         PageHelper pageHelper = new PageHelper();
         Properties properties = new Properties();
-        properties.setProperty("reasonable", "true");
-        properties.setProperty("supportMethodsArguments", "true");
-        properties.setProperty("returnPageInfo", "check");
-        properties.setProperty("params", "count=countSql");
+        properties.setProperty("pageSizeZero", "true");//分页尺寸为0时查询所有纪录不再执行分页
+        properties.setProperty("reasonable", "true");//页码<=0 查询第一页，页码>=总页数查询最后一页
+        properties.setProperty("supportMethodsArguments", "true");//支持通过 Mapper 接口参数来传递分页参数
         pageHelper.setProperties(properties);
 
         //添加插件
-        bean.setPlugins(new Interceptor[]{pageHelper});
+        factory.setPlugins(new Interceptor[]{pageHelper});
 
         //添加XML目录
         ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
-        bean.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));
-        return bean.getObject();
+        factory.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));
+        return factory.getObject();
     }
 
-    @Configuration
-    @AutoConfigureAfter(MybatisConfigurer.class)
-    public static class MyBatisMapperScannerConfigurer {
-
-        @Bean
-        public MapperScannerConfigurer mapperScannerConfigurer() {
-            MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
-            mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean");
-            mapperScannerConfigurer.setBasePackage(MAPPER_PACKAGE);
-            //配置通用mappers
-            Properties properties = new Properties();
-            properties.setProperty("mappers", MAPPER_INTERFACE_REFERENCE);
-            properties.setProperty("notEmpty", "false");
-            properties.setProperty("IDENTITY", "MYSQL");
-            mapperScannerConfigurer.setProperties(properties);
+    @Bean
+    public MapperScannerConfigurer mapperScannerConfigurer() {
+        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
+        mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean");
+        mapperScannerConfigurer.setBasePackage(MAPPER_PACKAGE);
 
-            return mapperScannerConfigurer;
-        }
+        //配置通用Mapper，详情请查阅官方文档
+        Properties properties = new Properties();
+        properties.setProperty("mappers", MAPPER_INTERFACE_REFERENCE);
+        properties.setProperty("notEmpty", "false");//insert、update是否判断字符串类型!='' 即 test="str != null"表达式内是否追加 and str != ''
+        properties.setProperty("IDENTITY", "MYSQL");
+        mapperScannerConfigurer.setProperties(properties);
 
+        return mapperScannerConfigurer;
     }
+
 }