SpringBoot开发规范部分通用模板+idea配置【项目通用-1】

SpringBoot开发规范通用模板

1 分页插件使用

通过MybatisPlus配置分页插件拦截器

@Configuration
@MapperScan("com.xuecheng.content.mapper") //拦截的mapper层
public class MybatisPlusConfig {//定义分页的拦截器@Beanpublic MybatisPlusInterceptor getMybatisPlusInterceptor() {MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor();mybatisPlusInterceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));return mybatisPlusInterceptor;}}

2 通用返回结果

2.1 带分页通用返回结果

• PageResult：

@Data
@ToString
public class PageResult<T> {// 数据列表private List<T> items;//总记录数private long counts;//当前页码private long page;//每页记录数private long pageSize;public PageResult(List<T> items, long counts, long page, long pageSize) {this.items = items;this.counts = counts;this.page = page;this.pageSize = pageSize;}}

2.2 分页请求参数

PageParams（分页请求参数）：

@Data
@ToString
public class PageParams {//当前页码默认值public static final long DEFAULT_PAGE_CURRENT = 1L;//每页记录数默认值public static final long DEFAULT_PAGE_SIZE = 10L;@ApiModelProperty("当前页码")//当前页码private Long pageNo = DEFAULT_PAGE_CURRENT;@ApiModelProperty("每页记录数")//每页记录数默认值private Long pageSize = DEFAULT_PAGE_SIZE;public PageParams() {}public PageParams(long pageNo, long pageSize) {this.pageNo = pageNo;this.pageSize = pageSize;}
}

2.3 日志处理

• 日志配置文件
  log4j2-dev.xml：

<?xml version="1.0" encoding="UTF-8"?>
<Configuration monitorInterval="180" packages=""><properties><property name="logdir">logs</property><property name="PATTERN">%date{YYYY-MM-dd HH:mm:ss,SSS} %level [%thread][%file:%line] - %msg%n%throwable</property></properties><Appenders><Console name="Console" target="SYSTEM_OUT"><PatternLayout pattern="${PATTERN}"/></Console><RollingFile name="ErrorAppender" fileName="${logdir}/error.log"filePattern="${logdir}/$${date:yyyy-MM-dd}/error.%d{yyyy-MM-dd-HH}.log" append="true"><PatternLayout pattern="${PATTERN}"/><ThresholdFilter level="ERROR" onMatch="ACCEPT" onMismatch="DENY"/><Policies><TimeBasedTriggeringPolicy interval="1" modulate="true" /></Policies></RollingFile><RollingFile name="DebugAppender" fileName="${logdir}/info.log"filePattern="${logdir}/$${date:yyyy-MM-dd}/info.%d{yyyy-MM-dd-HH}.log" append="true"><PatternLayout pattern="${PATTERN}"/><ThresholdFilter level="DEBUG" onMatch="ACCEPT" onMismatch="DENY"/><Policies><TimeBasedTriggeringPolicy interval="1" modulate="true" /></Policies></RollingFile><!--异步appender--><Async name="AsyncAppender" includeLocation="true"><AppenderRef ref="ErrorAppender"/><AppenderRef ref="DebugAppender"/></Async></Appenders><Loggers><!--过滤掉spring和mybatis的一些无用的debug信息--><logger name="org.springframework" level="INFO"></logger><logger name="org.mybatis" level="INFO"></logger><logger name="cn.zi.wanxinp2p.consumer.mapper" level="DEBUG"></logger><logger name="springfox" level="INFO"></logger><logger name="org.apache.http" level="INFO"></logger><logger name="com.netflix.discovery" level="INFO"></logger><logger name="RocketmqCommon"  level="INFO" ></logger><logger name="RocketmqRemoting" level="INFO"  ></logger><logger name="RocketmqClient" level="WARN"></logger><logger name="org.dromara.hmily" level="WARN"></logger><logger name="org.dromara.hmily.lottery" level="WARN"></logger><logger name="org.dromara.hmily.bonuspoint" level="WARN"></logger><!--OFF   0--><!--FATAL   100--><!--ERROR   200--><!--WARN   300--><!--INFO   400--><!--DEBUG   500--><!--TRACE   600--><!--ALL   Integer.MAX_VALUE--><Root level="DEBUG" includeLocation="true"><AppenderRef ref="AsyncAppender"/><AppenderRef ref="Console"/><AppenderRef ref="DebugAppender"/></Root></Loggers>
</Configuration>

• application.yml配置：

# 日志文件配置路径
logging:config: classpath:log4j2-dev.xml

3 全局异常处理

在多模块（微服务项目中一般放在base项目中）
微服务项目搭建解析

3.1 通用异常

public enum CommonError {UNKOWN_ERROR("执行过程异常，请重试。"),PARAMS_ERROR("非法参数"),OBJECT_NULL("对象为空"),QUERY_NULL("查询结果为空"),REQUEST_NULL("请求参数为空");private String errMessage;public String getErrMessage() {return errMessage;}private CommonError( String errMessage) {this.errMessage = errMessage;}}

3.2 错误响应参数包装

/*** 错误响应参数包装*/
public class RestErrorResponse implements Serializable {private String errMessage;public RestErrorResponse(String errMessage){this.errMessage= errMessage;}public String getErrMessage() {return errMessage;}public void setErrMessage(String errMessage) {this.errMessage = errMessage;}
}

3.3 自定义异常

public class XueChengPlusException extends RuntimeException {private String errMessage;public XueChengPlusException() {super();}public XueChengPlusException(String message) {super(message);this.errMessage = message;}public String getErrMessage(){return errMessage;}public static void cast(String errMessage){throw new XueChengPlusException(errMessage);}public static void cast(CommonError commonError){throw new XueChengPlusException(commonError.getErrMessage());}
}

3.4 全局异常处理器

@Slf4j@ControllerAdvice//控制器增强
public class GlobalExceptionHandler {//处理XueChengPlusException异常  此类异常是程序员主动抛出的，可预知异常@ResponseBody//将信息返回为 json格式@ExceptionHandler(XueChengPlusException.class)//此方法捕获XueChengPlusException异常@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)//状态码返回500public RestErrorResponse doXueChengPlusException(XueChengPlusException e){log.error("捕获异常：{}",e.getErrMessage());e.printStackTrace();String errMessage = e.getErrMessage();return new RestErrorResponse(errMessage);}//捕获不可预知异常 Exception@ResponseBody//将信息返回为 json格式@ExceptionHandler(Exception.class)//此方法捕获Exception异常@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)//状态码返回500public RestErrorResponse doException(Exception e){log.error("捕获异常：{}",e.getMessage());e.printStackTrace();return new RestErrorResponse(CommonError.UNKOWN_ERROR.getErrMessage());}@ResponseBody//将信息返回为 json格式@ExceptionHandler(MethodArgumentNotValidException.class)//此方法捕获MethodArgumentNotValidException异常@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)//状态码返回500public RestErrorResponse doMethodArgumentNotValidException(MethodArgumentNotValidException e){BindingResult bindingResult = e.getBindingResult();//校验的错误信息List<FieldError> fieldErrors = bindingResult.getFieldErrors();//收集错误StringBuffer errors = new StringBuffer();fieldErrors.forEach(error->{errors.append(error.getDefaultMessage()).append(",");});return new RestErrorResponse(errors.toString());}}

4 HttpClient插件使用

• 在idea插件中下载httpclient
• 编写对应环境配置文件xxxx.json，例如：

{"dev": {"access_token": "","gateway_host": "localhost:63010","content_host": "localhost:63040","system_host": "localhost:63110","media_host": "localhost:63050","search_host": "localhost:63080","auth_host": "localhost:63070","checkcode_host": "localhost:63075","learning_host": "localhost:63020"}
}

• 点击controller中的图标，自动生成文件或自己创建xxx.http
  

### 课程查询接口
POST {{content_host}}/content/course/list?pageNo=1&pageSize=2
Content-Type: application/json{"auditStatus": "202004","courseName": "","publishStatus": ""
}### 课程分类 查询
GET {{content_host}}/content/course-category/tree-nodes

5 JSR校验

5.1 概念

JSR (Java Specification Requests） 是一套 JavaBean 参数校验的标准
通过Java提供的注解，来达到参数校验效果

• @NotEmpty(message = “修改课程名称不能为空”,groups={ValidationGroups.Update.class})
• @NotEmpty(message = “适用人群不能为空”)
• @Size(message = “适用人群内容过少”,min = 10)

5.2 校验分组

• 定义分组：

public class ValidationGroups {//用于添加校验public interface Inster{};//用于修改校验public interface Update{};public interface Delete{};}

• controller中使用

insert分组为例

@PostMapping("/course")public CourseBaseInfoDto createCourseBase(@RequestBody @Validated(ValidationGroups.Inster.class) AddCourseDto addCourseDto){Long companyId = 22L;return courseBaseInfoService.createCourseBase(companyId,addCourseDto);}

5.3 实体类校验

@Data
@ToString
@ApiModel(value="AddCourseDto", description="新增课程基本信息")
public class AddCourseDto {@NotEmpty(message = "添加课程名称不能为空",groups={ValidationGroups.Inster.class})@NotEmpty(message = "修改课程名称不能为空",groups={ValidationGroups.Update.class})@ApiModelProperty(value = "课程名称", required = true)private String name;@NotEmpty(message = "适用人群不能为空")@Size(message = "适用人群内容过少",min = 10)@ApiModelProperty(value = "适用人群", required = true)private String users;

6 Idea通用配置

6.1 常用插件

• lombok
• HTTPClient
• Git、GitHub
• Lombok
• SpringBoot Initializr and Assistant
• Translation
• MybatisX
• GeneraterAllSetter
• JPA Buddy

6.2 文件模板

①mapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace=""></mapper>

②spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xmlns:c="http://www.springframework.org/schema/c"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd"></beans>

6.3 tips

• 鼠标控制代码大小

settins - editor - general - MouseControl(change font size...)

• file tepmlate

settings - file and code templates - Files(添加class模板)

class:

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end
#parse("File Header.java")
/*** @description TODO* @author zhouYi* @date ${DATE} ${TIME}* @version */
public class ${NAME} {
}

interface:

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end
#parse("File Header.java")/*** @description TODO* @author ${USER}* @date ${DATE} ${TIME}* @version */
public interface ${NAME} {
}

7 时间转换配置LocalDateTimeConfig

@Configuration
public class LocalDateTimeConfig {/** 序列化内容*   LocalDateTime -> String* 服务端返回给客户端内容* */@Beanpublic LocalDateTimeSerializer localDateTimeSerializer() {return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));}/** 反序列化内容*   String -> LocalDateTime* 客户端传入服务端数据* */@Beanpublic LocalDateTimeDeserializer localDateTimeDeserializer() {return new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));}// 配置@Beanpublic Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {return builder -> {builder.serializerByType(LocalDateTime.class, localDateTimeSerializer());builder.deserializerByType(LocalDateTime.class, localDateTimeDeserializer());};}}