环境

springboot 2.2.6.RELEASE
mybatis-plus 3.3.0
spring-boot-starter-swagger 1.5.1.RELEASE

  • 环境版本最好保持一致,不然,你可以收获意外的惊喜

实战


如遇到不清楚的,文件如何存放的,可以参考我的结构

sql脚本

/*
 Navicat Premium Data Transfer

 Source Server         : 本地
 Source Server Type    : MySQL
 Source Server Version : 50722
 Source Host           : localhost:3306
 Source Schema         : pro

 Target Server Type    : MySQL
 Target Server Version : 50722
 File Encoding         : 65001

 Date: 05/04/2020 19:17:01
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for student
-- ----------------------------
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student`  (
  `id` int(111) NOT NULL AUTO_INCREMENT COMMENT '编号',
  `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '姓名',
  `age` int(11) NULL DEFAULT NULL COMMENT '年龄',
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 4 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of student
-- ----------------------------
INSERT INTO `student` VALUES (1, '社长', 18);
INSERT INTO `student` VALUES (2, '老王', 20);
INSERT INTO `student` VALUES (3, '兰陵王', 11);

SET FOREIGN_KEY_CHECKS = 1;

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cxyxs</groupId>
    <artifactId>auto</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>auto</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!--web依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--junit测试-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.0</version>
        </dependency>

        <!--代码生成模式插件  3.0.3以后需要手动设置依赖-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.3.1.tmp</version>
        </dependency>

        <!--代码生成模板-->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.2</version>
        </dependency>

        <!--简化代码插件-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.18</version>
        </dependency>

        <!-- druid阿里巴巴数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.6</version>
        </dependency>

        <!-- 热部署 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <!--swagger2-->
        <dependency>
            <groupId>com.spring4all</groupId>
            <artifactId>spring-boot-starter-swagger</artifactId>
            <version>1.5.1.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <!--打包后的项目名-->
        <finalName>codeauto</finalName>
        <!--解决mapper文件不到class文件夹的问题-->
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*</include>
                </includes>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src\main\java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>


        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <!-- 1、设置jar的入口类 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <classpathPrefix>lib/</classpathPrefix>
                            <mainClass>com.cxyxs.auto.AutoApplication</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>


            <!--2、把附属的jar打到jar内部的lib目录中 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <executions>
                    <execution>
                        <id>copy-dependencies</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${project.build.directory}/lib</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>


            <!-- 3、打包过程忽略Junit测试 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>
  • MyBatis-Plus 从 3.0.3 之后移除了代码生成器与模板引擎的默认依赖,需要手动添加相关依赖:
  • 为方便以后前后端对接,集成了swagger
  • 可达成jar包,直接build就行,build里面的配置,就是为了打成jar包

application.yml

server:
  port: 8888

spring:
  datasource:
    # 配置数据源
    driver-class-name: com.mysql.cj.jdbc.Driver
    # 使用druid连接池
    type: com.alibaba.druid.pool.DruidDataSource
    url: jdbc:mysql://127.0.0.1:3306/pro?useUnicode=true&characterEncoding=utf8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=GMT%2B8
    username: root
    password: root

###增加日志输出,方便定位问题
logging:
  level:
    root : warn
    com.cxyxs.mybatisplus.dao: trace
  ###控制台输出格式
  pattern:
    console: '%p%m%n'

mybatis-plus:
  mapper-locations: classpath*:/com/cxyxs/auto/mapper/xml/*.xml
  global-config:
    db-config:
      ###逻辑未删除的值
      logic-not-delete-value: 0
      ###逻辑已删除的值
      logic-delete-value: 1


  ####扫描swagger注解
  swagger:
    base-package: com.cxyxs
  • 配置数据库的信息,以自己的配置为主
  • mapper-locations 是根据自动生成代码的规则而定义的
  • swagger 配置swagger注解,扫描范围

启动类

package com.cxyxs.auto;

import com.spring4all.swagger.EnableSwagger2Doc;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.cxyxs.auto.mapper")
@EnableSwagger2Doc
public class AutoApplication {

    public static void main(String[] args) {
        SpringApplication.run(AutoApplication.class, args);
    }
}
  • @MapperScan配置扫描dao包的位置(以我们常用的思维),社长习惯以mapper命名
  • @EnableSwagger2Doc 启用swagger注解

代码自动生成

package com.cxyxs.auto;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.FieldFill;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.po.TableFill;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.ArrayList;
import java.util.List;

/**
 * Description:
 * Author: wude
 * Date:  2020/4/5 9:14
 * Modified By:
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class CodeGenerationTests {
    public static void main(String[] args) {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        //当前路径
        String projectPath = System.getProperty("user.dir");
        //输出路径
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setAuthor("程序猿学社");    //设置作者
        //生成代码后,是否打开文件夹
        gc.setOpen(false);
        gc.setFileOverride(false);  //是否覆盖原来代码,个人建议设置为false,别覆盖,危险系数太高
        gc.setServiceName("%sService");   //去掉service的I前缀,一般只需要设置service就行
/*        gc.setMapperName("%sMapper");
        gc.setXmlName("%sMapper");
        gc.setServiceImplName("%sServiceImpl");
        gc.setControllerName("%sController");*/

        gc.setDateType(DateType.ONLY_DATE);   //日期格式
        gc.setSwagger2(true);       // 实体属性 Swagger2 注解,实体类上会增加注释
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://127.0.0.1:3306/pro?useUnicode=true&characterEncoding=utf8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=GMT%2B8");
        // dsc.setSchemaName("public");
        dsc.setDriverName("com.mysql.cj.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("root");
        dsc.setDbType(DbType.MYSQL);    //指定数据库的类型
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setParent("com.cxyxs.auto");   //自定义包的路径
        //pc.setModuleName("module");   //模块名称  设置后,会生成com.cxyxs.test.module,里面存放之前设置的mapper,entity
        pc.setEntity("entity");
        pc.setMapper("mapper");
        pc.setService("service");
        pc.setController("controller");
        mpg.setPackageInfo(pc);

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setInclude("student");    //设置映射的表名,可以设置多个表

        //表前缀设置  cxyxs_student
        //strategy.setTablePrefix(new String[]{"cxyxs_"});
        //包的命名规则,使用驼峰规则
        strategy.setNaming(NamingStrategy.underline_to_camel);
        //列的名称,使用驼峰规则
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        //是否使用lombok
        strategy.setEntityLombokModel(true);
        //驼峰命名
        strategy.setRestControllerStyle(true);
        strategy.setLogicDeleteFieldName("is_delete");   //逻辑删除,假删除会用到

        //自动填充字段,在项目开发过程中,例如创建时间,修改时间,每次,都需要我们来指定,太麻烦了,设置为自动填充规则,就不需要我们赋值咯
        TableFill fillInsert = new TableFill("create_time", FieldFill.INSERT);
        TableFill fillUpdate= new TableFill("update_time", FieldFill.UPDATE);
        List fillLists = new ArrayList();
        fillLists.add(fillInsert);
        fillLists.add(fillUpdate);
        strategy.setTableFillList(fillLists);
        //乐观锁
        //strategy.setVersionFieldName("version");
        mpg.setStrategy(strategy);

        mpg.execute();  //执行
    }
}

直接启动main方法 ,见证奇迹的时候到咯。


contoller,entity,mapper,service代码都给我们生成好咯。

  • swagger注释都给我们生成好咯,而且代码也很规范,让我们自己来写,可能会遇到很多很低级的错误。
  • 虽说,代码自动生成很智能,智能的前提,是有规范的,数据库命令,最高遵守相关的规范,这里就不过多阐述咯

controller类

package com.cxyxs.auto.controller;


import com.cxyxs.auto.entity.Student;
import com.cxyxs.auto.mapper.StudentMapper;
import com.cxyxs.auto.util.Result;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import java.util.List;

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author 程序猿学社
 * @since 2020-04-05
 */
@RestController
@RequestMapping("/student")
public class StudentController {
    @Autowired
    private StudentMapper studentMapper;

    @GetMapping("/test")
    @ApiOperation(value = "测试接口",notes = "测试")
    public List<Student> getStudent1(Student stu){
        List<Student> lists = studentMapper.selectList(null);
        return lists;
    }
}

StudentController这个类,是自动生成的,增加一个方法,来看看效果。

测试

http://localhost:8888/swagger-ui.html

通过页面可以发现有一个basic-error-controller,实际上,我们代码里面没有定义这个,有强迫症的,可以百度解决方法,配置一下,这里社长,就不配置咯。

通过可视化界面,前端可以看到返回的参数注释

  • 传参也有注释

点击try it out按钮

跟前端需要对接的传参和返回参数都有注释,那个接口,用来干嘛的,都有注释文档。就没有后台什么事咯


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