java

关注公众号 jb51net

关闭
首页 > 软件编程 > java > SpringBoot+MyBatisPlus+Vue 前后端分离搭建

SpringBoot+MyBatisPlus+Vue 前后端分离项目快速搭建过程(后端)

作者:牛哄哄的柯南

这篇文章主要介绍了SpringBoot+MyBatisPlus+Vue 前后端分离项目快速搭建过程(后端),快速生成后端代码、封装结果集、增删改查、模糊查找,毕设基础框架,本文给大家介绍的非常详细,对大家的学习或工作具有一定的参考借鉴价值,需要的朋友可以参考下

数据库准备

data_test.sql:

/*
SQLyog Enterprise v12.08 (64 bit)
MySQL - 5.7.31 : Database - data_test
*********************************************************************
*/


/*!40101 SET NAMES utf8 */;

/*!40101 SET SQL_MODE=''*/;

/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
CREATE DATABASE /*!32312 IF NOT EXISTS*/`data_test` /*!40100 DEFAULT CHARACTER SET utf8  */;

USE `data_test`;

/*Table structure for table `user` */

DROP TABLE IF EXISTS `user`;

CREATE TABLE `user` (
  `user_id` int(11) NOT NULL AUTO_INCREMENT,
  `user_name` varchar(50) CHARACTER SET utf8  NOT NULL COMMENT '账号',
  `password` varchar(50) CHARACTER SET utf8  NOT NULL COMMENT '密码',
  `user_state` varchar(10) CHARACTER SET utf8  NOT NULL DEFAULT '1' COMMENT '状态,逻辑删除',
  PRIMARY KEY (`user_id`)
) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8;

/*Data for the table `user` */

LOCK TABLES `user` WRITE;

insert  into `user`(`user_id`,`user_name`,`password`,`user_state`) values (1,'keafmd','keafmd','1'),(3,'21312321','123','0'),(11,'213','213','1'),(12,'keafmd','666','0');

UNLOCK TABLES;

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

后端搭建

1、快速创建个SpringBoot项目

第一步:Spring Initializr

在这里插入图片描述

第二步:Spring Initializr Project Settings

在这里插入图片描述

第三步:添加个Lombok工具

在这里插入图片描述

第四步:Finish

在这里插入图片描述

初始化的样子:

在这里插入图片描述

2、引入依赖

此处贴上整个pom.xml,部分依赖可能对于简单需求而言是多余的,可以自行舍弃。

pom.xml代码:

<?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>2.4.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.keafmd</groupId>
    <artifactId>springboot-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-server</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>20.0</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.3.2</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.49</version>
        </dependency>


        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.3.2</version>
            <scope>test</scope>
        </dependency>


        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.31</version>
            <scope>test</scope>
        </dependency>


        <dependency>
            <groupId>io.github.yedaxia</groupId>
            <artifactId>japidocs</artifactId>
            <version>1.4.3</version>
            <scope>test</scope>

        </dependency>
        <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.6</version>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.73</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/commons-beanutils/commons-beanutils -->
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.4</version>
        </dependency>


        <!-- 解密程序 https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on -->
        <dependency>
            <groupId>org.bouncycastle</groupId>
            <artifactId>bcprov-jdk15on</artifactId>
            <version>1.68</version>
        </dependency>

        <!--JWT 依赖 -->
        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>3.4.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

3、编写代码快速生成代码

因为此代码为辅助代码,放在test包下即可,相关的数据库信息以及包信息需要和你们自己的保持一致,自行修改,如何包命名和我一致,只需要修改数据库相关信息即可。

CodeGenerator:

package com.keafmd.mp;
import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

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

/**
 * Keafmd
 *
 * @ClassName: CodeGenerator
 * @Description: 代码生成器
 * @author: 牛哄哄的柯南
 * @Date: 2021-04-29 17:06
 * @Blog: https://keafmd.blog.csdn.net/
 */
public class CodeGenerator {

    /**
     * <p>
     * 读取控制台内容
     * </p>
     */
    public static String scanner(String tip) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder help = new StringBuilder();
        help.append("请输入" + tip + ":");
        System.out.println(help.toString());
        if (scanner.hasNext()) {
            String ipt = scanner.next();
            if (StringUtils.isNotBlank(ipt)) {
                return ipt;
            }
        }
        throw new MybatisPlusException("请输入正确的" + tip + "!");
    }

    public static void main(String[] args) {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
//        System.out.println("projectPath = " + projectPath);
        gc.setOutputDir(projectPath + "/src/main/java");
//        gc.setOutputDir("D:\\test");
        gc.setAuthor("关注公众号:牛哄哄的柯南");
        gc.setOpen(false);
        // gc.setSwagger2(true); 实体属性 Swagger2 注解
        gc.setServiceName("%sService");
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl("jdbc:mysql://127.0.0.1:3306/data_test?useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=UTC");
        // dsc.setSchemaName("public");
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("18044229");
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setModuleName(null);
        pc.setParent("com.keafmd");
        mpg.setPackageInfo(pc);

        // 自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                // to do nothing
            }
        };

        // 如果模板引擎是 freemarker
        String templatePath = "/templates/mapper.xml.ftl";
        // 如果模板引擎是 velocity
        // String templatePath = "/templates/mapper.xml.vm";

        // 自定义输出配置
        List<FileOutConfig> focList = new ArrayList<>();
        // 自定义配置会被优先输出
        focList.add(new FileOutConfig(templatePath) {
            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定义输出文件名 , 如果你 Entity 设置了前后缀、此处注意 xml 的名称会跟着发生变化!!
                return projectPath + "/src/main/resources/com/keafmd/mapper/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
            }
        });

        cfg.setFileOutConfigList(focList);
        mpg.setCfg(cfg);

        // 配置模板
        TemplateConfig templateConfig = new TemplateConfig();

        templateConfig.setXml(null);
        mpg.setTemplate(templateConfig);

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        strategy.setEntityLombokModel(true);
        strategy.setRestControllerStyle(true);
        strategy.setInclude(scanner("表名,多个英文逗号分割").split(","));
        strategy.setControllerMappingHyphenStyle(true);
        strategy.setTablePrefix("m_");
        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }
}

4、运行代码生成器生成代码

在控制台输入user(表名)
在这里插入图片描述
红框内为自动生成的代码:
在这里插入图片描述

5、编写application.properties

个人习惯把application.properties改为application.yml,修改端口为80

server:
  port: 80

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1/data_test?useSSL=false&&characterEncoding=UTF-8
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: 18044229

  jackson:
    date-format: yyyy-MM-dd HH:mm:ss
    time-zone: GMT+8
  mvc:
    throw-exception-if-no-handler-found: true
  web:
    resources:
      add-mappings: false

6、在启动类上添加@MapperScan

SpringbootServerApplication:

package com.keafmd;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.keafmd.mapper")
public class SpringbootServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootServerApplication.class, args);
    }

}

7、编写测试代码测试数据库是否连接正确

1、在 UserMapper代码页大括号内,按下Alt+Insert,选择Test
在这里插入图片描述
2、Ok
在这里插入图片描述
3、自动生成了测试类
在这里插入图片描述
4、编写测试代码

UserMapperTest :

package com.keafmd.mapper;

import com.keafmd.SpringbootServerApplication;
import com.keafmd.entity.User;
import com.keafmd.service.UserService;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;

import javax.annotation.Resource;

import java.util.List;

import static org.junit.jupiter.api.Assertions.*;

@SpringBootTest(classes = SpringbootServerApplication.class)
class UserMapperTest {

    @Resource
    UserService userService;

    @Test
    public void test1(){
        List<User> userList = userService.list();
        for (User user : userList) {
            System.out.println(user);
        }

    }



}

5、测试结果
在这里插入图片描述

至此,后端和数据库连接没问题。

8、编写后端的工具类代码(封装结果集、日期处理、解决跨域请求)

在这里插入图片描述

1、CommonResult

package com.keafmd.common;

import lombok.Getter;

/**
 * Keafmd
 *
 * @ClassName: CommonResult
 * @Description: 封装结果集
 * @author: 牛哄哄的柯南
 * @Date: 2021-04-29 18:11
 * @Blog: https://keafmd.blog.csdn.net/
 */

@Getter
public class CommonResult  {
    private Integer code;
    private String message;
    private Object obj;

    private CommonResult(Integer code, String message, Object obj) {
        this.code = code;
        this.message = message;
        this.obj = obj;
    }

    public static CommonResult nohandler() {
        return new CommonResult(ResultCode.NOHANDLER.getCode(), ResultCode.NOHANDLER.getMessage(),null);
    }
    public static CommonResult success(Object data) {
        return new CommonResult(ResultCode.SUCCESS.getCode(), ResultCode.SUCCESS.getMessage(),data);
    }
    public static CommonResult failed() {
        return new CommonResult(ResultCode.FAILED.getCode(), ResultCode.FAILED.getMessage(),null);
    }
    public static CommonResult failed(String message) {
        return new CommonResult(ResultCode.FAILED.getCode(),message,null);
    }
    public static CommonResult notoken() {
        return new CommonResult(ResultCode.NOTOKEN.getCode(), ResultCode.NOTOKEN.getMessage(),null);
    }
    public static CommonResult nopremiss() {
        return new CommonResult(ResultCode.NOPERMISS.getCode(), ResultCode.NOPERMISS.getMessage(),null);
    }
}

2、DateConverter

package com.keafmd.common;

import org.springframework.context.annotation.Configuration;
import org.springframework.core.convert.converter.Converter;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.regex.Pattern;

/**
 * Keafmd
 *
 * @ClassName: DateConverter
 * @Description: 日期处理
 * @author: 牛哄哄的柯南
 * @Date: 2021-04-29 18:11
 * @Blog: https://keafmd.blog.csdn.net/
 */

@Configuration
public class DateConverter implements Converter<String, Date> {

    public DateConverter() {
//        System.out.println("初始化........");
    }

    static List<SimpleDateFormat> sdfs = new ArrayList();

    static {
        sdfs.add(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"));
        sdfs.add(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        sdfs.add(new SimpleDateFormat("yyyy-MM-dd"));
        sdfs.add(new SimpleDateFormat("yyyy/MM/dd"));

    }

    @Override
    public Date convert(String s) {
        SimpleDateFormat sdf = null;
        if (Pattern.matches("^\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2}$", s)) {
            sdf = sdfs.get(1);
        }
        else if (Pattern.matches("^\\d{4}/\\d{2}/\\d{2} \\d{2}:\\d{2}:\\d{2}$", s)){
            sdf = sdfs.get(0);
        }
        else if (Pattern.matches("^\\d{4}/\\d{2}/\\d{2}$", s)){
            sdf = sdfs.get(3);
        }
        else if (Pattern.matches("^\\d{4}-\\d{2}/-\\d{2}}$", s)){
            sdf = sdfs.get(2);
        }

        Date date = null;
        try {
            date = sdf.parse(s);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return date;

    }
}

3、LocalDateTimeConverter

package com.keafmd.common;

import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

/**
 * Keafmd
 *
 * @ClassName: LocalDateTimeConverter
 * @Description: 日期处理
 * @author: 牛哄哄的柯南
 * @Date: 2021-04-29 18:11
 * @Blog: https://keafmd.blog.csdn.net/
 */

@Component
public class LocalDateTimeConverter implements Converter<String, LocalDateTime> {
    //2021-04-29%2001:02:03
    @Override
    public LocalDateTime convert(String s) {
        return LocalDateTime.parse(s, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
    }
}

4、ResultCode

package com.keafmd.common;

import lombok.Getter;

/**
 * Keafmd
 *
 * @ClassName: ResultCode
 * @Description: 结果代码
 * @author: 牛哄哄的柯南
 * @Date: 2021-04-29 18:11
 * @Blog: https://keafmd.blog.csdn.net/
 */

@Getter
public enum ResultCode {
    NOHANDLER(404,"请求地址错误"),
    SUCCESS(200,"操作成功"),
    FAILED(500,"操作失败"),
    NOTOKEN(401,"未登录或登录已超时"),
    NOPERMISS(403,"无操作权限"),
    ;

    private Integer code;
    private String message;

    ResultCode(Integer code, String message) {
        this.code = code;
        this.message = message;
    }



}

5、AppConfig

package com.keafmd.config;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.dialects.MySqlDialect;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.keafmd.common.DateConverter;
import com.keafmd.common.LocalDateTimeConverter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.List;

/**
 * Keafmd
 *
 * @ClassName: AppConfig
 * @Description: 解决跨域请求
 * @author: 牛哄哄的柯南
 * @Date: 2021-04-29 18:11
 * @Blog: https://keafmd.blog.csdn.net/
 */

@Configuration
public class AppConfig extends WebMvcConfigurationSupport {

    /**
     * 分页插件
     * @return
     */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        paginationInterceptor.setDialect(new MySqlDialect());
        paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
        return paginationInterceptor;
    }
    @Bean
    FilterRegistrationBean<CorsFilter> cors(){
        FilterRegistrationBean<CorsFilter> registrationBean = new FilterRegistrationBean<CorsFilter>();
        CorsConfiguration config = new CorsConfiguration();

        config.setAllowCredentials(true);
        config.addAllowedOrigin("http://127.0.0.1:81");
        config.addAllowedHeader("*");
        config.addAllowedMethod("*");

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", config);

        CorsFilter filter = new CorsFilter(source);
        registrationBean.setFilter(filter);
        registrationBean.addUrlPatterns("/*");

        return registrationBean;
    }


    /**
     * curl http://127.0.0.1/user/getById?id=31
     * @param converters
     */

    @Override
    protected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        ObjectMapper objectMapper = new ObjectMapper();

        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        objectMapper.disable(DeserializationFeature.ADJUST_DATES_TO_CONTEXT_TIME_ZONE);
//        objectMapper.enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING);
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); //忽略 null 字段

        JavaTimeModule javaTimeModule = new JavaTimeModule();

        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));

//        javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
//        javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
        objectMapper.registerModule(javaTimeModule);
        converters.add(new MappingJackson2HttpMessageConverter(objectMapper));
    }

    @Override
    protected void addFormatters(FormatterRegistry registry) {
        super.addFormatters(registry);
        registry.addConverter(new DateConverter());
        registry.addConverter(new LocalDateTimeConverter());
    }
}

6、DefaultExceptionHandler

package com.keafmd.config;

import com.keafmd.common.CommonResult;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.NoHandlerFoundException;

import javax.servlet.http.HttpServletRequest;

/**
 * Keafmd
 *
 * @ClassName: DefaultExceptionHandler
 * @Description:
 * @author: 牛哄哄的柯南
 * @Date: 2021-04-29 18:11
 * @Blog: https://keafmd.blog.csdn.net/
 */

@RestControllerAdvice
public class DefaultExceptionHandler {

    @ExceptionHandler
    public CommonResult exceptionHandler(HttpServletRequest request, Exception ex) {
        ex.printStackTrace();
        if(ex instanceof NoHandlerFoundException) {
            return CommonResult.nohandler();
        }
        return CommonResult.failed(ex.getMessage());
    }


}

9、编写后端的增删改查代码

1、在UserService接口中编写分页查询代码

package com.keafmd.service;

import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.keafmd.entity.User;
import com.baomidou.mybatisplus.extension.service.IService;

/**
 * <p>
 *  服务类
 * </p>
 *
 * @author 关注公众号:牛哄哄的柯南
 * @since 2021-04-29
 */
public interface UserService extends IService<User> {
    Page pageList(Page page, User user);
}

2、在UserServiceImpl实现类中实现分页查询和模糊查找

package com.keafmd.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.keafmd.entity.User;
import com.keafmd.mapper.UserMapper;
import com.keafmd.service.UserService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author 关注公众号:牛哄哄的柯南
 * @since 2021-04-29
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

    @Override
    public Page pageList(Page page, User user) {
        if(page == null){
            page = new Page();
        }

        QueryWrapper wrapper = new QueryWrapper();
        if(user!=null && StringUtils.isNotEmpty(user.getUserName())){
            //根据user_name字段模糊查找
            wrapper.like("user_name",user.getUserName());
        }

        return super.page(page,wrapper);
    }
}

3、在UserController中编写增删改查代码

package com.keafmd.controller;


import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.keafmd.common.CommonResult;
import com.keafmd.entity.User;
import com.keafmd.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;

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

import java.util.Arrays;

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author 关注公众号:牛哄哄的柯南
 * @since 2021-04-29
 */
@RestController
@RequestMapping("/user")
public class UserController {
    
    @Autowired
    UserService userService;

    /**
     * 查找
     * @return
     */
    @RequestMapping("/list")
    CommonResult list(ModelMap modelMap, Page page, @ModelAttribute("user") User user) {

        page = userService.pageList(page, user);
        modelMap.addAttribute("page", page);
        return CommonResult.success(page);
    }

    @RequestMapping("/save")
    CommonResult save(User user){

        return CommonResult.success(userService.saveOrUpdate(user));

    }


    /**
     * 根据id查
     * @param id
     * @return
     */
    @RequestMapping("/getById")
    CommonResult getById(Integer id) {
        return CommonResult.success(userService.getById(id));
    }

    /**
     * 删除,逻辑删除
     * @param id
     * @return
     */
    @RequestMapping("/del")
    CommonResult del(Integer id ) {
        User user = userService.getById(id);
        user.setUserState("0");
        return CommonResult.success(userService.updateById(user));
    }


    /**
     * 批量删除
     * @param id
     * @return
     */
    @RequestMapping("/delByIds")
    CommonResult delByIds(Integer[] id) {
        /*for (Integer integer : id) {
            System.out.println(integer);
        }*/
        return CommonResult.success(userService.removeByIds(Arrays.asList(id)));
    }

}

前端搭建

由于篇幅有限,前端搭建单独再写一篇

SpringBoot+MyBatisPlus+Vue 前后端分离项目快速搭建【前端篇】【快速生成后端代码、封装结果集、增删改查、模糊查找】【毕设基础框架】

以上就是SpringBoot+MyBatisPlus+Vue 前后端分离项目快速搭建【后端篇】【快速生成后端代码、封装结果集、增删改查、模糊查找】【毕设基础框架】的全部内容

到此这篇关于SpringBoot+MyBatisPlus+Vue 前后端分离项目快速搭建过程(后端)的文章就介绍到这了,更多相关SpringBoot+MyBatisPlus+Vue 前后端分离搭建内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

您可能感兴趣的文章:
阅读全文