add > MyBatis配置&SpringMVC配置

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

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+package com.company.project.configurer;
+
+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.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
+import org.springframework.core.io.support.ResourcePatternResolver;
+import tk.mybatis.spring.mapper.MapperScannerConfigurer;
+
+import javax.annotation.Resource;
+import javax.sql.DataSource;
+import java.util.Properties;
+
+import static com.company.project.core.ProjectConstant.*;
+
+/**
+ * Mybatis & Mapper & PageHelper 配置
+ */
+@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);
+
+        //分页插件
+        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");
+        pageHelper.setProperties(properties);
+
+        //添加插件
+        bean.setPlugins(new Interceptor[]{pageHelper});
+
+        //添加XML目录
+        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
+        bean.setMapperLocations(resolver.getResources("classpath:mapper/*.xml"));
+        return bean.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);
+
+            return mapperScannerConfigurer;
+        }
+
+    }
+}
+

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

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+package com.company.project.configurer;
+
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.serializer.SerializerFeature;
+import com.alibaba.fastjson.support.config.FastJsonConfig;
+import com.alibaba.fastjson.support.spring.FastJsonpHttpMessageConverter4;
+import com.company.project.core.Result;
+import com.company.project.core.ResultCode;
+import com.company.project.core.ServiceException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.web.method.HandlerMethod;
+import org.springframework.web.servlet.HandlerExceptionResolver;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.NoHandlerFoundException;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.List;
+
+/**
+ * Spring MVC 配置
+ */
+@Configuration
+public class WebMvcConfigurer extends WebMvcConfigurerAdapter {
+
+    private final Logger logger = LoggerFactory.getLogger(WebMvcConfigurer.class);
+
+    //使用阿里 FastJson 作为JSON MessageConverter
+    @Override
+    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
+        FastJsonpHttpMessageConverter4 converter = new FastJsonpHttpMessageConverter4();
+        FastJsonConfig config = new FastJsonConfig();
+        config.setSerializerFeatures(SerializerFeature.WriteMapNullValue,//保留空的字段
+                SerializerFeature.WriteNullStringAsEmpty,//String null -> ""
+                SerializerFeature.WriteNullNumberAsZero);//Number null -> 0
+        converter.setFastJsonConfig(config);
+        converter.setDefaultCharset(Charset.forName("UTF-8"));
+        converters.add(converter);
+    }
+
+
+
+    //统一异常处理
+    @Override
+    public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) {
+        exceptionResolvers.add(new HandlerExceptionResolver() {
+            public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception e) {
+                Result result = new Result();
+                if (handler instanceof HandlerMethod) {
+                    HandlerMethod handlerMethod = (HandlerMethod) handler;
+
+                    if (e instanceof ServiceException) {//业务失败的异常，如“账号或密码错误”
+                        result.setCode(ResultCode.FAIL).setMessage(e.getMessage());
+                        logger.info(e.getMessage());
+                    } else {
+                        result.setCode(ResultCode.INTERNAL_SERVER_ERROR).setMessage("接口 [" + request.getRequestURI() + "] 内部错误，请联系管理员");
+                        String message = String.format("接口 [%s] 出现异常，方法：%s.%s，异常摘要：%s",
+                                request.getRequestURI(),
+                                handlerMethod.getBean().getClass().getName(),
+                                handlerMethod.getMethod().getName(),
+                                e.getMessage());
+                        logger.error(message, e);
+                    }
+                } else {
+                    if (e instanceof NoHandlerFoundException) {
+                        result.setCode(ResultCode.NOT_FOUND).setMessage("接口 [" + request.getRequestURI() + "] 不存在");
+                    } else {
+                        result.setCode(ResultCode.INTERNAL_SERVER_ERROR).setMessage(e.getMessage());
+                        logger.error(e.getMessage(), e);
+                    }
+                }
+                responseResult(response, result);
+                return new ModelAndView();
+            }
+
+        });
+    }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        //添加拦截器
+    }
+
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        //解决跨域问题
+        //registry.addMapping("/**");
+    }
+
+    private void responseResult(HttpServletResponse response, Result result) {
+        response.setCharacterEncoding("UTF-8");
+        response.setHeader("Content-type", "application/json;charset=UTF-8");
+        response.setStatus(200);
+        try {
+            response.getWriter().write(JSON.toJSONString(result));
+        } catch (IOException ex) {
+            logger.error(ex.getMessage());
+        }
+    }
+}