springboot+mybatis-plus项目搭建

springboot+mybatis-plus项目搭建

创建项目

使用idea内嵌spring工具初始化工程

选择项目依赖

初始化导入 spring web即可

通过修改pom.xml定制项目环境依赖

spring-boot父版本

• 当前版本为2.6.3
• 

导入相关依赖

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--spring-boot 开发工具依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
 
        <!--        引入数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.28</version>
            <scope>runtime</scope>
        </dependency>
 
        <!--        引入lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
 
        <!--        spring-boot 测试依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--        引入mybatis-plus依赖-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.1</version>
        </dependency>
        <!--        引入阿里druid连接池-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.4</version>
        </dependency>

注意 ：数据库驱动版本需与目标数据库版本一致

bulid异常

解决方法：添加版本号（与父版本保持一致）

导入完毕重新加载Maven仓库

初始化项目结构

创建包文件

• config ：配置包
• controller ：接口包
• dao ：业务包
• entity ：实体包
• utils ：工具包

修改配置文件

修改application.properties文件为yml格式

编写配置文件

server:
  port: 7788 # 运行端口
spring:
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/smp?characterEncoding=UTF-8 #数据库链接地址
    hikari:
      username: root #用户名
      password: 123456 #密码
  servlet:
    multipart:
      max-request-size: 12MB #运行请求传递文件大小默认最大为10M
      max-file-size: 12MB #运行服务器可以处理的最大文件大小
  profiles:
    active: pord #指定那个配置环境生效 用于本地与生产环境的切换
 
#日志配置
logging:
  level:
    root: info
    com.woma: debug
 
 

创建实体对象

package com.woma.entity;
 
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import lombok.Data;
 
@Data //通过lombok简化实体创建过程
public class user {
 
    @TableId(type = IdType.AUTO) //id自增
    private Integer id;
    private String username;
    private String password;
}
 

创建dao接口

package com.woma.dao;
 
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.woma.entity.User;
 
//使用mybatis-puls增强接口
public interface UserDao extends BaseMapper<User> {
}
 

在入口类中扫描dao包

package com.woma;
 
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
@MapperScan("com.woma.dao")//此方式只扫描一次更为灵活
public class SmApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(SmApplication.class, args);
    }
 
}
 

创建测试类进行测试

测试完成

跨域问题解决

入口类同级目录下导入 Cors配置类

package com.woma;
 
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
 
@Configuration
public class CorsConfig {
 
    // 当前跨域请求最大有效时长。默认1天
    private static final long MAX_AGE = 24 * 60 * 60;
 
    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*"); // 1 设置访问源地址
        corsConfiguration.addAllowedHeader("*"); // 2 设置访问源请求头
        corsConfiguration.addAllowedMethod("*"); // 3 设置访问源请求方法
        corsConfiguration.setMaxAge(MAX_AGE);
        return corsConfiguration;
    }
 
    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig()); // 4 对接口配置跨域设置
        return new CorsFilter(source);
    }
}
 

验证码接口

/**
     * 生成验证码
     */
    @RequestMapping("generateImageCode")
    public void generateImageCode(HttpSession session, HttpServletResponse response) throws IOException {
        //1.生成4位随机数
        String code = VerifyCodeUtils.generateVerifyCode(4);
        //2.保存到session作用域
        session.setAttribute("code",code);
        //3.根据随机数生成图片 && 4.通过response响应图片  && 5.设置响应类型
        response.setContentType("image/png");
        ServletOutputStream os = response.getOutputStream();
        VerifyCodeUtils.outputImage(220,60, os,code);
    }

验证码工具类

VerifyCodeUtils.java

package com.baizhi.utils;
 
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.Random;
 
/**
 *@创建人  cx
 *@创建时间  2018/11/27 17:36
 *@描述   验证码生成
 */
public class VerifyCodeUtils{
 
    //使用到Algerian字体，系统里没有的话需要安装字体，字体只显示大写，去掉了1,0,i,o几个容易混淆的字符
    public static final String VERIFY_CODES = "23456789ABCDEFGHJKLMNPQRSTUVWXYZ";
    private static Random random = new Random();
 
 
    /**
     * 使用系统默认字符源生成验证码
     * @param verifySize    验证码长度
     * @return
     */
    public static String generateVerifyCode(int verifySize){
        return generateVerifyCode(verifySize, VERIFY_CODES);
    }
    /**
     * 使用指定源生成验证码
     * @param verifySize    验证码长度
     * @param sources   验证码字符源
     * @return
     */
    public static String generateVerifyCode(int verifySize, String sources){
        if(sources == null || sources.length() == 0){
            sources = VERIFY_CODES;
        }
        int codesLen = sources.length();
        Random rand = new Random(System.currentTimeMillis());
        StringBuilder verifyCode = new StringBuilder(verifySize);
        for(int i = 0; i < verifySize; i++){
            verifyCode.append(sources.charAt(rand.nextInt(codesLen-1)));
        }
        return verifyCode.toString();
    }
 
    /**
     * 生成随机验证码文件,并返回验证码值
     * @param w
     * @param h
     * @param outputFile
     * @param verifySize
     * @return
     * @throws IOException
     */
    public static String outputVerifyImage(int w, int h, File outputFile, int verifySize) throws IOException{
        String verifyCode = generateVerifyCode(verifySize);
        outputImage(w, h, outputFile, verifyCode);
        return verifyCode;
    }
 
    /**
     * 输出随机验证码图片流,并返回验证码值
     * @param w
     * @param h
     * @param os
     * @param verifySize
     * @return
     * @throws IOException
     */
    public static String outputVerifyImage(int w, int h, OutputStream os, int verifySize) throws IOException{
        String verifyCode = generateVerifyCode(verifySize);
        outputImage(w, h, os, verifyCode);
        return verifyCode;
    }
 
    /**
     * 生成指定验证码图像文件
     * @param w
     * @param h
     * @param outputFile
     * @param code
     * @throws IOException
     */
    public static void outputImage(int w, int h, File outputFile, String code) throws IOException{
        if(outputFile == null){
            return;
        }
        File dir = outputFile.getParentFile();
        if(!dir.exists()){
            dir.mkdirs();
        }
        try{
            outputFile.createNewFile();
            FileOutputStream fos = new FileOutputStream(outputFile);
            outputImage(w, h, fos, code);
            fos.close();
        } catch(IOException e){
            throw e;
        }
    }
 
    /**
     * 输出指定验证码图片流
     * @param w
     * @param h
     * @param os
     * @param code
     * @throws IOException
     */
    public static void outputImage(int w, int h, OutputStream os, String code) throws IOException{
        int verifySize = code.length();
        BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
        Random rand = new Random();
        Graphics2D g2 = image.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
        Color[] colors = new Color[5];
        Color[] colorSpaces = new Color[] { Color.WHITE, Color.CYAN,
                Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA, Color.ORANGE,
                Color.PINK, Color.YELLOW };
        float[] fractions = new float[colors.length];
        for(int i = 0; i < colors.length; i++){
            colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];
            fractions[i] = rand.nextFloat();
        }
        Arrays.sort(fractions);
 
        g2.setColor(Color.GRAY);// 设置边框色
        g2.fillRect(0, 0, w, h);
 
        Color c = getRandColor(200, 250);
        g2.setColor(c);// 设置背景色
        g2.fillRect(0, 2, w, h-4);
 
        //绘制干扰线
        Random random = new Random();
        g2.setColor(getRandColor(160, 200));// 设置线条的颜色
        for (int i = 0; i < 20; i++) {
            int x = random.nextInt(w - 1);
            int y = random.nextInt(h - 1);
            int xl = random.nextInt(6) + 1;
            int yl = random.nextInt(12) + 1;
            g2.drawLine(x, y, x + xl + 40, y + yl + 20);
        }
 
        // 添加噪点
        float yawpRate = 0.05f;// 噪声率
        int area = (int) (yawpRate * w * h);
        for (int i = 0; i < area; i++) {
            int x = random.nextInt(w);
            int y = random.nextInt(h);
            int rgb = getRandomIntColor();
            image.setRGB(x, y, rgb);
        }
 
        shear(g2, w, h, c);// 使图片扭曲
 
        g2.setColor(getRandColor(100, 160));
        int fontSize = h-4;
        Font font = new Font("Algerian", Font.ITALIC, fontSize);
        g2.setFont(font);
        char[] chars = code.toCharArray();
        for(int i = 0; i < verifySize; i++){
            AffineTransform affine = new AffineTransform();
            affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() ? 1 : -1), (w / verifySize) * i + fontSize/2, h/2);
            g2.setTransform(affine);
            g2.drawChars(chars, i, 1, ((w-10) / verifySize) * i + 5, h/2 + fontSize/2 - 10);
        }
 
        g2.dispose();
        ImageIO.write(image, "jpg", os);
    }
 
    private static Color getRandColor(int fc, int bc) {
        if (fc > 255)
            fc = 255;
        if (bc > 255)
            bc = 255;
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r, g, b);
    }
 
    private static int getRandomIntColor() {
        int[] rgb = getRandomRgb();
        int color = 0;
        for (int c : rgb) {
            color = color << 8;
            color = color | c;
        }
        return color;
    }
 
    private static int[] getRandomRgb() {
        int[] rgb = new int[3];
        for (int i = 0; i < 3; i++) {
            rgb[i] = random.nextInt(255);
        }
        return rgb;
    }
 
    private static void shear(Graphics g, int w1, int h1, Color color) {
        shearX(g, w1, h1, color);
        shearY(g, w1, h1, color);
    }
 
    private static void shearX(Graphics g, int w1, int h1, Color color) {
 
        int period = random.nextInt(2);
 
        boolean borderGap = true;
        int frames = 1;
        int phase = random.nextInt(2);
 
        for (int i = 0; i < h1; i++) {
            double d = (double) (period >> 1)
                    * Math.sin((double) i / (double) period
                    + (6.2831853071795862D * (double) phase)
                    / (double) frames);
            g.copyArea(0, i, w1, 1, (int) d, 0);
            if (borderGap) {
                g.setColor(color);
                g.drawLine((int) d, i, 0, i);
                g.drawLine((int) d + w1, i, w1, i);
            }
        }
 
    }
 
    private static void shearY(Graphics g, int w1, int h1, Color color) {
 
        int period = random.nextInt(40) + 10; // 50;
 
        boolean borderGap = true;
        int frames = 20;
        int phase = 7;
        for (int i = 0; i < w1; i++) {
            double d = (double) (period >> 1)
                    * Math.sin((double) i / (double) period
                    + (6.2831853071795862D * (double) phase)
                    / (double) frames);
            g.copyArea(i, 0, 1, h1, 0, (int) d);
            if (borderGap) {
                g.setColor(color);
                g.drawLine(i, (int) d, i, 0);
                g.drawLine(i, (int) d + h1, i, h1);
            }
 
        }
 
    }
}

验证码验证

/**
     * 用户注册
     * @return
     */
    @RequestMapping("register")
    public String register(User user, String code,HttpSession session){
        //log.debug("用户名: {},真是姓名: {},密码: {},性别: {},",user.getUsername(),user.getRealname(),user.getPassword(),user.getGender());
        log.debug("用户输入验证码: {}",code);
 
        try {
            //1.判断用户输入验证码和session中验证码是否一致
            //取出session中的验证码
            String sessionCode = session.getAttribute("code").toString();
            //验证码比较，不区分大小写
            if(!sessionCode.equalsIgnoreCase(code))throw new RuntimeException("验证码输入错误!");
            //2.注册用户
            userService.register(user);
        } catch (RuntimeException e) {
            e.printStackTrace();
            return "redirect:/register"; //注册失败回到注册
        }
        return  "redirect:/login";  //注册成功跳转到登录
    }