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springboot-part——springboot-integrate-07
Mybatis-plus版完整CRUD项目文档记录#xff1a; 【SpringBoot3Myba… 文章目录 GitHub 项目一、依赖二、 配置文件三、启动类四、SpringBoot3兼容Druid报错五、工具类5.1 结果封装类5.2 解决枚举类5.3 MD5加密工具类 GitHub 项目
springboot-part——springboot-integrate-07
Mybatis-plus版完整CRUD项目文档记录 【SpringBoot3Mybatis-plus】头条新闻项目实现CRUD登录注册
一、依赖
pom.xml
?xml version1.0 encodingUTF-8?
project xmlnshttp://maven.apache.org/POM/4.0.0xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersionparentgroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-parent/artifactIdversion3.0.5/version/parentgroupIdcom.wake/groupIdartifactIdspringboot-integrate-07/artifactIdversion1.0-SNAPSHOT/versionpropertiesmaven.compiler.source17/maven.compiler.sourcemaven.compiler.target17/maven.compiler.targetproject.build.sourceEncodingUTF-8/project.build.sourceEncoding/propertiesdependencies!-- web开发的场景启动器 --dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependency!-- mybatis启动器 --dependencygroupIdorg.mybatis.spring.boot/groupIdartifactIdmybatis-spring-boot-starter/artifactIdversion3.0.1/version/dependency!-- 数据库相关配置启动器 jdbcTemplate 事务相关--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-jdbc/artifactId/dependency!-- 测试启动器 --dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-test/artifactId/dependency!-- AOP启动器 --dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-aop/artifactId/dependency!-- druid启动器的依赖 --dependencygroupIdcom.alibaba/groupIdartifactIddruid-spring-boot-3-starter/artifactIdversion1.2.18/version/dependency!-- 驱动类--dependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdversion8.0.28/version/dependency!-- lombok --dependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactId/dependency!-- pagehelper --dependencygroupIdcom.github.pagehelper/groupIdartifactIdpagehelper-spring-boot-starter/artifactIdversion2.1.0/version/dependency!-- ConfigurationProperties 注解--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-configuration-processor/artifactId/dependency/dependencies!-- SpringBoot应用打包插件--buildpluginsplugingroupIdorg.springframework.boot/groupIdartifactIdspring-boot-maven-plugin/artifactId/plugin/plugins/build/project二、 配置文件
application.yml
server:servlet:context-path: /spring:datasource:# 连接池类型type: com.alibaba.druid.pool.DruidDataSource # 使用Druid连接池# Druid的其他属性配置 springboot3整合情况下,数据库连接信息必须在Druid属性下!druid:url: jdbc:mysql://localhost:3306/db01_mybatisusername: rootpassword: rootdriver-class-name: com.mysql.cj.jdbc.Driver# 初始化时建立物理连接的个数initial-size: 5# 连接池的最小空闲数量min-idle: 5# 连接池最大连接数量max-active: 20# 获取连接时最大等待时间单位毫秒max-wait: 60000# 申请连接的时候检测如果空闲时间大于timeBetweenEvictionRunsMillis执行validationQuery检测连接是否有效。test-while-idle: true# 既作为检测的间隔时间又作为testWhileIdel执行的依据time-between-eviction-runs-millis: 60000# 销毁线程时检测当前连接的最后活动时间和当前时间差大于该值时关闭当前连接(配置连接在池中的最小生存时间)min-evictable-idle-time-millis: 30000# 用来检测数据库连接是否有效的sql 必须是一个查询语句(oracle中为 select 1 from dual)validation-query: select 1# 申请连接时会执行validationQuery检测连接是否有效,开启会降低性能,默认为truetest-on-borrow: false# 归还连接时会执行validationQuery检测连接是否有效,开启会降低性能,默认为truetest-on-return: false# 是否缓存preparedStatement, 也就是PSCache,PSCache对支持游标的数据库性能提升巨大比如说oracle,在mysql下建议关闭。pool-prepared-statements: false# 要启用PSCache必须配置大于0当大于0时poolPreparedStatements自动触发修改为true。在Druid中不会存在Oracle下PSCache占用内存过多的问题可以把这个数值配置大一些比如说100max-pool-prepared-statement-per-connection-size: -1# 合并多个DruidDataSource的监控数据use-global-data-source-stat: truemybatis:configuration: # setting配置auto-mapping-behavior: full # 开启resultMap自动映射 设置映射等级full 复杂情况也能映射 多表联查相关map-underscore-to-camel-case: true # true开启属性字段驼峰命名自动映射将xxx_xxx这样的列名自动映射到xxXxx这样驼峰式命名的属性名log-impl: org.apache.ibatis.logging.slf4j.Slf4jImpltype-aliases-package: com.wake.pojo # 配置别名 批量将包下的类设置别名都为首字母小写mapper-locations: classpath:/mappers/*.xml # mapperxml位置 三、启动类
/*** Mapper接口* 表示当前接口为mybatis中的Mapper接口* 程序运行时会自动创建接口的实现类对象(代理对象)并交给Spring的IOC容器管理* MapperScan(com.wake.mapper) 直接全扫描不用单个添加*/
MapperScan(com.wake.mapper)
SpringBootApplication
public class Main {public static void main(String[] args) {SpringApplication.run(Main.class,args);}
}四、SpringBoot3兼容Druid报错 META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports
com.alibaba.druid.spring.boot3.autoconfigure.DruidDataSourceAutoConfigure五、工具类
5.1 结果封装类
package com.wake.utils;/*** 全局统一返回结果类*/
public class ResultT {// 返回码private Integer code;// 返回消息private String message;// 返回数据private T data;public Result(){}// 返回数据protected static T ResultT build(T data) {ResultT result new ResultT();if (data ! null)result.setData(data);return result;}public static T ResultT build(T body, Integer code, String message) {ResultT result build(body);result.setCode(code);result.setMessage(message);return result;}public static T ResultT build(T body, ResultCodeEnum resultCodeEnum) {ResultT result build(body);result.setCode(resultCodeEnum.getCode());result.setMessage(resultCodeEnum.getMessage());return result;}/*** 操作成功* param data baseCategory1List* param T* return*/public staticT ResultT ok(T data){ResultT result build(data);return build(data, ResultCodeEnum.SUCCESS);}public ResultT message(String msg){this.setMessage(msg);return this;}public ResultT code(Integer code){this.setCode(code);return this;}public Integer getCode() {return code;}public void setCode(Integer code) {this.code code;}public String getMessage() {return message;}public void setMessage(String message) {this.message message;}public T getData() {return data;}public void setData(T data) {this.data data;}
}5.2 解决枚举类
package com.wake.utils;/*** 统一返回结果状态信息类*/
public enum ResultCodeEnum {SUCCESS(200, success),USERNAME_ERROR(501, usernameError),PASSWORD_ERROR(503, passwordError),NOTLOGIN(504, notLogin),USERNAME_USED(505, userNameUsed);private Integer code;private String message;private ResultCodeEnum(Integer code, String message) {this.code code;this.message message;}public Integer getCode() {return code;}public String getMessage() {return message;}
}5.3 MD5加密工具类
package com.wake.utils;import org.springframework.stereotype.Component;import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;Component
public final class MD5Util {public static String encrypt(String strSrc) {try {char hexChars[] { 0, 1, 2, 3, 4, 5, 6, 7, 8,9, a, b, c, d, e, f };byte[] bytes strSrc.getBytes();MessageDigest md MessageDigest.getInstance(MD5);md.update(bytes);bytes md.digest();int j bytes.length;char[] chars new char[j * 2];int k 0;for (int i 0; i bytes.length; i) {byte b bytes[i];chars[k] hexChars[b 4 0xf];chars[k] hexChars[b 0xf];}return new String(chars);} catch (NoSuchAlgorithmException e) {e.printStackTrace();throw new RuntimeException(MD5加密出错 e);}}
}
