博客项目-day01
项目使用技术
springboot+mybatisplus+redis+mysql
项目搭建
数据库
以下是具体的sql建表结构
CREATE TABLE `blog`.`ms_article` (
`id` bigint(0) NOT NULL AUTO_INCREMENT,
`comment_counts` int(0) NULL DEFAULT NULL COMMENT '评论数量',
`create_date` bigint(0) NULL DEFAULT NULL COMMENT '创建时间',
`summary` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '简介',
`title` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '标题',
`view_counts` int(0) NULL DEFAULT NULL COMMENT '浏览数量',
`weight` int(0) NOT NULL COMMENT '是否置顶',
`author_id` bigint(0) NULL DEFAULT NULL COMMENT '作者id',
`body_id` bigint(0) NULL DEFAULT NULL COMMENT '内容id',
`category_id` int(0) NULL DEFAULT NULL COMMENT '类别id',
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 25 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
CREATE TABLE `blog`.`ms_article_tag` (
`id` bigint(0) NOT NULL AUTO_INCREMENT,
`article_id` bigint(0) NOT NULL,
`tag_id` bigint(0) NOT NULL,
PRIMARY KEY (`id`) USING BTREE,
INDEX `article_id`(`article_id`) USING BTREE,
INDEX `tag_id`(`tag_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
CREATE TABLE `blog`.`ms_tag` (
`id` bigint(0) NOT NULL AUTO_INCREMENT,
`avatar` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL DEFAULT NULL,
`tag_name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 11 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
CREATE TABLE `blog`.`ms_sys_user` (
`id` bigint(0) NOT NULL AUTO_INCREMENT,
`account` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '账号',
`admin` bit(1) NULL DEFAULT NULL COMMENT '是否管理员',
`avatar` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '头像',
`create_date` bigint(0) NULL DEFAULT NULL COMMENT '注册时间',
`deleted` bit(1) NULL DEFAULT NULL COMMENT '是否删除',
`email` varchar(128) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '邮箱',
`last_login` bigint(0) NULL DEFAULT NULL COMMENT '最后登录时间',
`mobile_phone_number` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '手机号',
`nickname` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '昵称',
`password` varchar(64) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '密码',
`salt` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '加密盐',
`status` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '状态',
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 16 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
springboot配置文件（配置类）
springboot的配置文件，端口定义在8888文件下
#server
server.port= 8888
spring.application.name=mszlu_blog
# datasource
spring.datasource.url=jdbc:mysql://localhost:3306/blog?useUnicode=true&characterEncoding=UTF-8&serverTimeZone=UTC
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
#mybatis-plus
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
mybatis-plus.global-config.db-config.table-prefix=ms_
mybatisplus分页插件
package com.mszlu.blog.config;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
//扫包，将此包下的接口生成代理实现类，并且注册到spring容器中
@MapperScan("com.mszlu.blog.dao")
public class MybatisPlusConfig {
//分页插件
@Bean
public MybatisPlusInterceptor mybatisPlusInterceptor(){
MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
interceptor.addInnerInterceptor(new PaginationInnerInterceptor());
return interceptor;
}
}
WebMvc跨域配置
package com.mszlu.blog.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class WebConfig implements WebMvcConfigurer {
@Override
public void addCorsMappings(CorsRegistry registry) {
//跨域配置，不可设置为*，不安全, 前后端分离项目，可能域名不一致
//本地测试 端口不一致 也算跨域
registry.addMapping("/**").allowedOrigins("http://localhost:8080");
}
}
前端
下载个Hbuilder
然后将对应的前端工程导入后，npm run build（只用构建一次），npm run dev
maven
parent继承了springboot父工程表明这是springboot工程，虽然我们创建的是maven
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.mszlugroupId>
<artifactId>blog-parentartifactId>
<version>1.0-SNAPSHOTversion>
<parent>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-parentartifactId>
<version>2.5.0version>
<relativePath/>
parent>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
<java.version>1.8java.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starterartifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-loggingartifactId>
exclusion>
exclusions>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-log4j2artifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-aopartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-mailartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-data-redisartifactId>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>fastjsonartifactId>
<version>1.2.76version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-configuration-processorartifactId>
<optional>trueoptional>
dependency>
<dependency>
<groupId>org.apache.commonsgroupId>
<artifactId>commons-lang3artifactId>
dependency>
<dependency>
<groupId>commons-collectionsgroupId>
<artifactId>commons-collectionsartifactId>
<version>3.2.2version>
dependency>
<dependency>
<groupId>com.baomidougroupId>
<artifactId>mybatis-plus-boot-starterartifactId>
<version>3.4.3version>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
dependency>
<dependency>
<groupId>joda-timegroupId>
<artifactId>joda-timeartifactId>
<version>2.10.10version>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-maven-pluginartifactId>
plugin>
plugins>
build>
project>
功能完成
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分页流程（含上面配置的分页拦截器）
public List<ArticleVo> listArticlesPage(PageParams pageParams) {
QueryWrapper<Article> queryWrapper = new QueryWrapper<>();
Page<Article> page = new Page<>(pageParams.getPage(),pageParams.getPageSize());
Page<Article> articlePage = articleMapper.selectPage(page, queryWrapper);
List<ArticleVo> articleVoList = copyList(articlePage.getRecords(),true,false,true);
return articleVoList;
}
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都挺正常的
记得当前端要求的数据和数据库不一致可以建Vo或者值只查询赋值需要的数据
全局异常处理类
这里是捕获了全部，建议分不同类别进行捕获比较好
package com.mszlu.blog.handler;
import com.mszlu.blog.vo.Result;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
//对加了@Controller注解的方法进行拦截处理 AOP的实现
@ControllerAdvice
public class AllExceptionHandler {
//进行异常处理，处理Exception.class的异常
@ExceptionHandler(Exception.class)
@ResponseBody //返回json数据
public Result doException(Exception ex){
ex.printStackTrace();
return Result.fail(-999,"系统异常");
}
}
收获
- 复习了Mybatisplus的知识，将mapper接口继承BaseMapper，然后里面有各种方法，需要我们对各种方法的操作进行了解，尤其是条件查询和分页查询，MybatisPlus真的很好用，但是不能多表查询，多表查询需要用mybatis原生功能
- 学习了Mybatisplus的代码生成器，里面的各种规范（数据库配置，全局配置，包配置，策略配置），还有一个MybatisPlusCodeHelperPro的可视化的mp代码生成器
- 配置WebMvcConfig和MybatisPlusConfig的配置
- mysql中date类型可以用毫秒数来进行存储，也可以用对应日期类型
- maven工程到springboot工程的转变：
（1.）父工程设为spring框架，导入相关springboot的依赖
（2.）写个springboot启动类
（3.）写个springboot的配置文件application.yml/properties
bug
Mybatisplus有bug啊，建议java17搭配版本3.5.7
java8可以搭配3.4.3
3.4.3java17用会访问不到数据库
3.5.1又会找不到mapper（不知道为啥）