修复当mapper目录没有mapper的xml配置文件的时候，启动报错的问题

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

@@ -4,17 +4,19 @@
 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;
+import org.springframework.util.ObjectUtils;
 import tk.mybatis.spring.mapper.MapperScannerConfigurer;
 
 import javax.annotation.Resource;
 import javax.sql.DataSource;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Properties;
 
 import static com.company.project.core.ProjectConstant.*;
@@ -24,45 +26,81 @@
  */
 @Configuration
 public class MybatisConfigurer {
+ @Resource
+ private DataSource dataSource;
 
  @Bean
- public SqlSessionFactory sqlSessionFactoryBean(DataSource dataSource) throws Exception {
+ public SqlSessionFactory sqlSessionFactoryBean() throws Exception {
  SqlSessionFactoryBean factory = new SqlSessionFactoryBean();
  factory.setDataSource(dataSource);
  factory.setTypeAliasesPackage(MODEL_PACKAGE);
 
  //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("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
+ //分页尺寸为0时查询所有纪录不再执行分页
+ properties.setProperty("pageSizeZero", "true");
+ //页码<=0 查询第一页，页码>=总页数查询最后一页
+ properties.setProperty("reasonable", "true");
+ //支持通过 Mapper 接口参数来传递分页参数
+ properties.setProperty("supportMethodsArguments", "true");
  pageHelper.setProperties(properties);
 
  //添加插件
  factory.setPlugins(new Interceptor[]{pageHelper});
 
  //添加XML目录
  ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
- factory.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));
+ //如果没有此目录的话，后续初始化SqlSessionFactory会报错，这里参考MybatisProperties的代码
+ //这样纯使用注解，没有mapper目录也可以了
+ org.springframework.core.io.Resource[] resources = null;
+ if (!ObjectUtils.isEmpty(resources = resolveMapperLocations("classpath:mapper/**/*.xml"))) {
+ factory.setMapperLocations(resources);
+ }
  return factory.getObject();
  }
 
- @Bean
- public MapperScannerConfigurer mapperScannerConfigurer() {
- MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
- mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean");
- mapperScannerConfigurer.setBasePackage(MAPPER_PACKAGE);
+ @Configuration
+ @AutoConfigureAfter(MybatisConfigurer.class)
+ public static class MyBatisMapperScannerConfigurer {
 
- //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);
+ @Bean
+ public MapperScannerConfigurer mapperScannerConfigurer() {
+ MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
+ mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean");
+ mapperScannerConfigurer.setBasePackage(MAPPER_PACKAGE);
+ //配置通用mappers，详情请查阅官方文档
+ Properties properties = new Properties();
+ properties.setProperty("mappers", MAPPER_INTERFACE_REFERENCE);
+ //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("notEmpty", "false");
+ properties.setProperty("IDENTITY", "MYSQL");
+ mapperScannerConfigurer.setProperties(properties);
+
+ return mapperScannerConfigurer;
+ }
 
- return mapperScannerConfigurer;
  }
 
+ public org.springframework.core.io.Resource[] resolveMapperLocations(String... mapperLocations) {
+
+ PathMatchingResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver();
+ ArrayList resources = new ArrayList();
+ if(mapperLocations != null) {
+ int total = mapperLocations.length;
+
+ for(int i = 0; i < total; ++i) {
+ String mapperLocation = mapperLocations[i];
+ try {
+ org.springframework.core.io.Resource[] mappers = resourceResolver.getResources(mapperLocation);
+ resources.addAll(Arrays.asList(mappers));
+ } catch (IOException ex) {
+ ;
+ }
+ }
+ }
+
+ return (org.springframework.core.io.Resource[])resources.toArray(new org.springframework.core.io.Resource[resources.size()]);
+ }
 }
 

src/main/java/com/company/project/core/ResultCode.java

@@ -1,14 +1,14 @@
 package com.company.project.core;
 
 /**
- * 响应码枚举，参考HTTP状态码的语义
+ * 响应码枚举，参考微信全局返回码说明
  */
 public enum ResultCode {
- SUCCESS(200),//成功
- FAIL(400),//失败
- UNAUTHORIZED(401),//未认证（签名错误）
- NOT_FOUND(404),//接口不存在
- INTERNAL_SERVER_ERROR(500);//服务器内部错误
+ SUCCESS(0),//请求成功
+ FAIL(40000),//请求失败(比如请求参数不匹配，请求body之类的错误)
+ UNAUTHORIZED(40001),//未认证（签名错误）
+ NOT_FOUND(40004),//接口不存在
+ INTERNAL_SERVER_ERROR(-1);//服务器内部错误,系统繁忙
 
  private final int code;