数据库连接池配置&生成、读取二维码&集成多数据源&入参字段定义为Date类型，支持时间戳及年-月-日

数据库连接池配置

# 数据源配置
spring:
    datasource:
        type: com.alibaba.druid.pool.DruidDataSource
        driverClassName: com.mysql.cj.jdbc.Driver
        druid:
            # 主库数据源
            master:
                url: jdbc:mysql://localhost:3306/database?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
                username: root
                password: password
            # 从库数据源
            slave:
                # 从数据源开关/默认关闭
                enabled: false
                url: 
                username: 
                password: 
            # 初始连接数
            initialSize: 5
            # 最小连接池数量
            minIdle: 10
            # 最大连接池数量
            maxActive: 20
            # 配置获取连接等待超时的时间
            maxWait: 60000
            # 配置连接超时时间
            connectTimeout: 30000
            # 配置网络超时时间
            socketTimeout: 60000
            # 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
            timeBetweenEvictionRunsMillis: 60000
            # 配置一个连接在池中最小生存的时间，单位是毫秒
            minEvictableIdleTimeMillis: 300000
            # 配置一个连接在池中最大生存的时间，单位是毫秒
            maxEvictableIdleTimeMillis: 900000
            # 配置检测连接是否有效
            validationQuery: SELECT 1 FROM DUAL
            testWhileIdle: true
            testOnBorrow: false
            testOnReturn: false
            webStatFilter: 
                enabled: true
            statViewServlet:
                enabled: true
                # 设置白名单，不填则允许所有访问
                allow:
                url-pattern: /druid/*
                # 控制台管理用户名和密码
                login-username: ruoyi
                login-password: 123456
            filter:
                stat:
                    enabled: true
                    # 慢SQL记录
                    log-slow-sql: true
                    slow-sql-millis: 1000
                    merge-sql: true
                wall:
                    config:
                        multi-statement-allow: true

 

SpringBoot生成、读取二维码

生成读取二维码依赖

     com.google.zxing
     core
     3.3.3


      com.google.zxing
      javase
      3.3.3

代码示例

package com.demo.demo.QRcode;
 
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
 
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import java.awt.image.BufferedImage;
import java.io.File;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;
 
@Controller
public class QRCodeController {
 
    @RequestMapping("QRCode")
    @ResponseBody
    public String QRCode(HttpServletRequest req){
        final int width = 300;
        final int height = 300;
        final String format = "png";
        final String content = "我爱你，中国!!!";
        //定义二维码的参数
        HashMap hints = new HashMap();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");// 指定编码格式
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);// 指定纠错等级
        hints.put(EncodeHintType.MARGIN, 2);//设置白边
        //生成二维码
        try{
            //编码的内容,编码的方式（二维码、条形码...）,首选的宽度,首选的高度,编码时的额外参数
            BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
            Path file = new File("F:\\ideaWorkSpace\\demo\\src\\main\\resources\\static\\img.png").toPath();
            MatrixToImageWriter.writeToPath(bitMatrix, format, file);
        }catch(Exception e){
 
        }
        return "success";
    }
 
    @RequestMapping("getQRCode")
    @ResponseBody
    public String getQRCode() throws Exception {
        MultiFormatReader formatReader = new MultiFormatReader();
        File file = new File("F:\\ideaWorkSpace\\demo\\src\\main\\resources\\static\\img.png");
        BufferedImage image = ImageIO.read(file);
        BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
        //定义二维码的参数
        HashMap hints = new HashMap();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");// 指定编码格式
        Result result = formatReader.decode(binaryBitmap, hints);
        System.out.println("二维码解析结果：" + result.toString());
        System.out.println("二维码的格式：" + result.getBarcodeFormat());
        System.out.println("二维码的文本内容：" + result.getText());
        return result.getText();
    }
}

SpringBoot集成多数据源

依赖先行、pom.xml

代码结构

 配置项

server:
  port:3666
spring:
  application:
    name: multiple-data
  datasource:
    show-sql: false
    db1:
      jdbc-url: jdbc:mysql://ip地址:端口/数据库名?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
      username: 数据库账号
      password: 数据库密码
      driver-class-name: com.mysql.cj.jdbc.Driver
    db2:
      jdbc-url: jdbc:postgresql://ip地址:端口/数据库名?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&useSSL=false&allowPublicKeyRetrieval=true
      username: 数据库账号
      password: 数据库密码
      driver-class-name: org.postgresql.Driver
    db3:
      jdbc-url: jdbc:sqlserver://ip地址:端口;databaseName=数据库名
      username: 数据库账号
      password: 数据库密码
      driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver

 配置类

数据源1的配置类

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
 
import javax.sql.DataSource;

@Configuration
@MapperScan(basePackages = "com.zkgl.dao.db1",sqlSessionFactoryRef = "db1SqlSessionFactory")
public class MysqlDataSourceConfig {
    static final String MAPPER_LOCATION = "classpath:/mapper/db1/*.xml";
    @Bean("db1DataSource")
    @ConfigurationProperties(prefix = "spring.datasource.db1")
    public DataSource getDb1DataSource(){
        return DataSourceBuilder.create().build();
    }
    @Bean("db1SqlSessionFactory")
    public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db1DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
        return bean.getObject();
    }
    @Bean("db1SqlSessionTemplate")
    public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db1SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

数据源2的配置类

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;

@Configuration
@MapperScan(basePackages = "com.zkgl.dao.db2",sqlSessionFactoryRef = "db2SqlSessionFactory")
public class PgDataSourceConfig {
 
    static final String MAPPER_LOCATION = "classpath:/mapper/db2/*.xml";
    @Bean("db2DataSource")
    @ConfigurationProperties(prefix = "spring.datasource.db2")
    public DataSource getDb2DataSource(){
        return DataSourceBuilder.create().build();
    }
    @Bean("db2SqlSessionFactory")
    public SqlSessionFactory db2SqlSessionFactory(@Qualifier("db2DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
        return bean.getObject();
    }
    @Bean("db2SqlSessionTemplate")
    public SqlSessionTemplate db2SqlSessionTemplate(@Qualifier("db2SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

数据源3的配置类

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Configuration;
 
@Configuration
@MapperScan(basePackages = "com.zkgl.dao.db3",sqlSessionFactoryRef = "db3SqlSessionFactory")
public class SqlServerDataSourceConfig {
    static final String MAPPER_LOCATION = "classpath:/mapper/db3/*.xml";
    @Bean("db3DataSource")
    @ConfigurationProperties(prefix = "spring.datasource.db3")
    public DataSource getDb1DataSource(){
        return DataSourceBuilder.create().build();
    }
    @Bean("db3SqlSessionFactory")
    public SqlSessionFactory db1SqlSessionFactory(@Qualifier("db3DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources(MAPPER_LOCATION));
        return bean.getObject();
    }
    @Bean("db3SqlSessionTemplate")
    public SqlSessionTemplate db1SqlSessionTemplate(@Qualifier("db3SqlSessionFactory") SqlSessionFactory sqlSessionFactory){
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

SpringBoot入参字段定义为Date类型，不进行任何配置，默认支持

解析支持：时间戳和年-月-日字符串