springboot配置druid多数据源的示例代码-编程学习网

1、配置多数据源所需要的jar
2、配置多数据源所需要的工具类
3、DataSourceType 枚举类
4、DruidProperties druid 配置属性
5、DruidConfig druid 配置多数据源
6、DynamicDataSource 动态数据源
7、DynamicDataSourceContextHolder 数据源切换处理
8、DataSource 自定义多数据源切换注解
9、DataSourceAspect 多数据源处理
10、yml配置

1、配置多数据源所需要的jar

		<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.10</version>
        </dependency>
        <!-- 配置注解执行器配置完成后，当执行类中已经定义了对象和该对象的字段后，在配置文件中对该类赋值时，便会非常方便的弹出提示信息 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <!-- 阿里数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.11</version>
        </dependency>

2、配置多数据源所需要的工具类

SpringUtils

import org.springframework.aop.framework.AopContext;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;


@Component
public final class SpringUtils implements BeanFactoryPostProcessor, ApplicationContextAware {
    
    private static ConfigurableListableBeanFactory beanFactory;

    private static ApplicationContext applicationContext;

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        SpringUtils.beanFactory = beanFactory;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringUtils.applicationContext = applicationContext;
    }

    
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException {
        return (T) beanFactory.getBean(name);
    }

    
    public static <T> T getBean(Class<T> clz) throws BeansException {
        T result = (T) beanFactory.getBean(clz);
        return result;
    }

    
    public static boolean containsBean(String name) {
        return beanFactory.containsBean(name);
    }

    
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.isSingleton(name);
    }

    
    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.getType(name);
    }

    
    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.getAliases(name);
    }

    
    @SuppressWarnings("unchecked")
    public static <T> T getAopProxy(T invoker) {
        return (T) AopContext.currentProxy();
    }

    
    public static String[] getActiveProfiles() {
        return applicationContext.getEnvironment().getActiveProfiles();
    }

    
    public static String getActiveProfile() {
        final String[] activeProfiles = getActiveProfiles();

        return StringUtils.isNotEmpty(activeProfiles) ? activeProfiles[0] : null;
    }

    
    public static String getRequiredProperty(String key) {
        return applicationContext.getEnvironment().getRequiredProperty(key);
    }

}

StringUtils


import cn.hutool.core.text.StrFormatter;
import org.springframework.util.AntPathMatcher;

import java.util.*;


public class StringUtils extends org.apache.commons.lang3.StringUtils {
    
    private static final String NULLSTR = "";

    
    private static final char SEPARATOR = '_';

    
    public static <T> T nvl(T value, T defaultValue) {
        return value != null ? value : defaultValue;
    }

    
    public static boolean isEmpty(Collection<?> coll) {
        return isNull(coll) || coll.isEmpty();
    }

    
    public static boolean isNotEmpty(Collection<?> coll) {
        return !isEmpty(coll);
    }

    
    public static boolean isEmpty(Object[] objects) {
        return isNull(objects) || (objects.length == 0);
    }

    
    public static boolean isNotEmpty(Object[] objects) {
        return !isEmpty(objects);
    }

    
    public static boolean isEmpty(Map<?, ?> map) {
        return isNull(map) || map.isEmpty();
    }

    
    public static boolean isNotEmpty(Map<?, ?> map) {
        return !isEmpty(map);
    }

    
    public static boolean isEmpty(String str) {
        return isNull(str) || NULLSTR.equals(str.trim());
    }

    
    public static boolean isNotEmpty(String str) {
        return !isEmpty(str);
    }

    
    public static boolean isNull(Object object) {
        return object == null;
    }

    
    public static boolean isNotNull(Object object) {
        return !isNull(object);
    }

    
    public static boolean isArray(Object object) {
        return isNotNull(object) && object.getClass().isArray();
    }

    
    public static String trim(String str) {
        return (str == null ? "" : str.trim());
    }

    
    public static String substring(final String str, int start) {
        if (str == null) {
            return NULLSTR;
        }

        if (start < 0) {
            start = str.length() + start;
        }

        if (start < 0) {
            start = 0;
        }
        if (start > str.length()) {
            return NULLSTR;
        }

        return str.substring(start);
    }

    
    public static String substring(final String str, int start, int end) {
        if (str == null) {
            return NULLSTR;
        }

        if (end < 0) {
            end = str.length() + end;
        }
        if (start < 0) {
            start = str.length() + start;
        }

        if (end > str.length()) {
            end = str.length();
        }

        if (start > end) {
            return NULLSTR;
        }

        if (start < 0) {
            start = 0;
        }
        if (end < 0) {
            end = 0;
        }

        return str.substring(start, end);
    }

    
    public static String format(String template, Object... params) {
        if (isEmpty(params) || isEmpty(template)) {
            return template;
        }
        return StrFormatter.format(template, params);
    }

    
    public static final Set<String> str2Set(String str, String sep) {
        return new HashSet<String>(str2List(str, sep, true, false));
    }

    
    public static final List<String> str2List(String str, String sep, boolean filterBlank, boolean trim) {
        List<String> list = new ArrayList<String>();
        if (StringUtils.isEmpty(str)) {
            return list;
        }

        // 过滤空白字符串
        if (filterBlank && StringUtils.isBlank(str)) {
            return list;
        }
        String[] split = str.split(sep);
        for (String string : split) {
            if (filterBlank && StringUtils.isBlank(string)) {
                continue;
            }
            if (trim) {
                string = string.trim();
            }
            list.add(string);
        }

        return list;
    }

    
    public static boolean containsAnyIgnoreCase(CharSequence cs, CharSequence... searchCharSequences) {
        if (isEmpty(cs) || isEmpty(searchCharSequences)) {
            return false;
        }
        for (CharSequence testStr : searchCharSequences) {
            if (containsIgnoreCase(cs, testStr)) {
                return true;
            }
        }
        return false;
    }

    
    public static String toUnderScoreCase(String str) {
        if (str == null) {
            return null;
        }
        StringBuilder sb = new StringBuilder();
        // 前置字符是否大写
        boolean preCharIsUpperCase = true;
        // 当前字符是否大写
        boolean curreCharIsUpperCase = true;
        // 下一字符是否大写
        boolean nexteCharIsUpperCase = true;
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (i > 0) {
                preCharIsUpperCase = Character.isUpperCase(str.charAt(i - 1));
            } else {
                preCharIsUpperCase = false;
            }

            curreCharIsUpperCase = Character.isUpperCase(c);

            if (i < (str.length() - 1)) {
                nexteCharIsUpperCase = Character.isUpperCase(str.charAt(i + 1));
            }

            if (preCharIsUpperCase && curreCharIsUpperCase && !nexteCharIsUpperCase) {
                sb.append(SEPARATOR);
            } else if ((i != 0 && !preCharIsUpperCase) && curreCharIsUpperCase) {
                sb.append(SEPARATOR);
            }
            sb.append(Character.toLowerCase(c));
        }

        return sb.toString();
    }

    
    public static boolean inStringIgnoreCase(String str, String... strs) {
        if (str != null && strs != null) {
            for (String s : strs) {
                if (str.equalsIgnoreCase(trim(s))) {
                    return true;
                }
            }
        }
        return false;
    }

    
    public static String lastStringDel(String str, String spit) {
        if (!StringUtils.isEmpty(str) && str.endsWith(spit)) {
            return str.subSequence(0, str.length() - 1).toString();
        }
        return str;
    }

    
    public static String convertToCamelCase(String name) {
        StringBuilder result = new StringBuilder();
        // 快速检查
        if (name == null || name.isEmpty()) {
            // 没必要转换
            return "";
        } else if (!name.contains("_")) {
            // 不含下划线，仅将首字母大写
            return name.substring(0, 1).toUpperCase() + name.substring(1);
        }
        // 用下划线将原始字符串分割
        String[] camels = name.split("_");
        for (String camel : camels) {
            // 跳过原始字符串中开头、结尾的下换线或双重下划线
            if (camel.isEmpty()) {
                continue;
            }
            // 首字母大写
            result.append(camel.substring(0, 1).toUpperCase());
            result.append(camel.substring(1).toLowerCase());
        }
        return result.toString();
    }

    
    public static String toCamelCase(String s) {
        if (s == null) {
            return null;
        }
        if (s.indexOf(SEPARATOR) == -1) {
            return s;
        }
        s = s.toLowerCase();
        StringBuilder sb = new StringBuilder(s.length());
        boolean upperCase = false;
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);

            if (c == SEPARATOR) {
                upperCase = true;
            } else if (upperCase) {
                sb.append(Character.toUpperCase(c));
                upperCase = false;
            } else {
                sb.append(c);
            }
        }
        return sb.toString();
    }

    
    public static boolean matches(String str, List<String> strs) {
        if (isEmpty(str) || isEmpty(strs)) {
            return false;
        }
        for (String pattern : strs) {
            if (isMatch(pattern, str)) {
                return true;
            }
        }
        return false;
    }

    
    public static boolean isMatch(String pattern, String url) {
        AntPathMatcher matcher = new AntPathMatcher();
        return matcher.match(pattern, url);
    }

    @SuppressWarnings("unchecked")
    public static <T> T cast(Object obj) {
        return (T) obj;
    }

    
    public static final String padl(final Number num, final int size) {
        return padl(num.toString(), size, '0');
    }

    
    public static final String padl(final String s, final int size, final char c) {
        final StringBuilder sb = new StringBuilder(size);
        if (s != null) {
            final int len = s.length();
            if (s.length() <= size) {
                for (int i = size - len; i > 0; i--) {
                    sb.append(c);
                }
                sb.append(s);
            } else {
                return s.substring(len - size, len);
            }
        } else {
            for (int i = size; i > 0; i--) {
                sb.append(c);
            }
        }
        return sb.toString();
    }
}

3、DataSourceType 枚举类


public enum DataSourceType {
    
    MASTER,

    
    SLAVE
}

4、DruidProperties druid 配置属性


import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;


@Configuration
public class DruidProperties {
    @Value("${spring.datasource.druid.initialSize}")
    private int initialSize;

    @Value("${spring.datasource.druid.minIdle}")
    private int minIdle;

    @Value("${spring.datasource.druid.maxActive}")
    private int maxActive;

    @Value("${spring.datasource.druid.maxWait}")
    private int maxWait;

    @Value("${spring.datasource.druid.timeBetweenEvictionRunsMillis}")
    private int timeBetweenEvictionRunsMillis;

    @Value("${spring.datasource.druid.minEvictableIdleTimeMillis}")
    private int minEvictableIdleTimeMillis;

    @Value("${spring.datasource.druid.maxEvictableIdleTimeMillis}")
    private int maxEvictableIdleTimeMillis;

    @Value("${spring.datasource.druid.validationQuery}")
    private String validationQuery;

    @Value("${spring.datasource.druid.testWhileIdle}")
    private boolean testWhileIdle;

    @Value("${spring.datasource.druid.testOnBorrow}")
    private boolean testOnBorrow;

    @Value("${spring.datasource.druid.testOnReturn}")
    private boolean testOnReturn;

    public DruidDataSource dataSource(DruidDataSource datasource) {
        
        datasource.setInitialSize(initialSize);
        datasource.setMaxActive(maxActive);
        datasource.setMinIdle(minIdle);

        
        datasource.setMaxWait(maxWait);

        
        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);

        
        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        datasource.setMaxEvictableIdleTimeMillis(maxEvictableIdleTimeMillis);

        
        datasource.setValidationQuery(validationQuery);
        
        datasource.setTestWhileIdle(testWhileIdle);
        
        datasource.setTestOnBorrow(testOnBorrow);
        
        datasource.setTestOnReturn(testOnReturn);
        return datasource;
    }
}

5、DruidConfig druid 配置多数据源

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import com.alibaba.druid.spring.boot.autoconfigure.properties.DruidStatProperties;
import com.alibaba.druid.util.Utils;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import sanss.ywyx.utils.SpringUtils;

import javax.servlet.*;
import javax.sql.DataSource;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;


@Configuration
public class DruidConfig {
    @Bean
    @ConfigurationProperties("spring.datasource.druid.master")
    public DataSource masterDataSource(DruidProperties druidProperties) {
        DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
        return druidProperties.dataSource(dataSource);
    }

    @Bean
    @ConfigurationProperties("spring.datasource.druid.slave")
    @ConditionalOnProperty(prefix = "spring.datasource.druid.slave", name = "enabled", havingValue = "true")
    public DataSource slaveDataSource(DruidProperties druidProperties) {
        DruidDataSource dataSource = DruidDataSourceBuilder.create().build();
        return druidProperties.dataSource(dataSource);
    }

    @Bean(name = "dynamicDataSource")
    @Primary
    public DynamicDataSource dataSource(DataSource masterDataSource) {
        Map<Object, Object> targetDataSources = new HashMap<>();
        targetDataSources.put(DataSourceType.MASTER.name(), masterDataSource);
        setDataSource(targetDataSources, DataSourceType.SLAVE.name(), "slaveDataSource");
        return new DynamicDataSource(masterDataSource, targetDataSources);
    }

    
    public void setDataSource(Map<Object, Object> targetDataSources, String sourceName, String beanName) {
        try {
            DataSource dataSource = SpringUtils.getBean(beanName);
            targetDataSources.put(sourceName, dataSource);
        } catch (Exception e) {
        }
    }

    
    @SuppressWarnings({"rawtypes", "unchecked"})
    @Bean
    @ConditionalOnProperty(name = "spring.datasource.druid.statViewServlet.enabled", havingValue = "true")
    public FilterRegistrationBean removeDruidFilterRegistrationBean(DruidStatProperties properties) {
        // 获取web监控页面的参数
        DruidStatProperties.StatViewServlet config = properties.getStatViewServlet();
        // 提取common.js的配置路径
        String pattern = config.getUrlPattern() != null ? config.getUrlPattern() : "/druid

public class DynamicDataSource extends AbstractRoutingDataSource {
    public DynamicDataSource(DataSource defaultTargetDataSource, Map<Object, Object> targetDataSources) {
        super.setDefaultTargetDataSource(defaultTargetDataSource);
        super.setTargetDataSources(targetDataSources);
        super.afterPropertiesSet();
    }

    @Override
    protected Object determineCurrentLookupKey() {
        return DynamicDataSourceContextHolder.getDataSourceType();
    }
}

7、DynamicDataSourceContextHolder 数据源切换处理


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class DynamicDataSourceContextHolder {
    public static final Logger log = LoggerFactory.getLogger(DynamicDataSourceContextHolder.class);

    
    private static final ThreadLocal<String> CONTEXT_HOLDER = new ThreadLocal<>();

    
    public static void setDataSourceType(String dsType) {
        log.info("切换到{}数据源", dsType);
        CONTEXT_HOLDER.set(dsType);
    }

    
    public static String getDataSourceType() {
        return CONTEXT_HOLDER.get();
    }

    
    public static void clearDataSourceType() {
        CONTEXT_HOLDER.remove();
    }
}

8、DataSource 自定义多数据源切换注解

import java.lang.annotation.*;


@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface DataSource {
    
    public DataSourceType value() default DataSourceType.MASTER;
}

9、DataSourceAspect 多数据源处理

package sanss.ywyx.config.druid;

import java.util.Objects;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import sanss.ywyx.utils.StringUtils;


@Aspect
@Order(1)
@Component
public class DataSourceAspect
{
    protected Logger logger = LoggerFactory.getLogger(getClass());

    @Pointcut("@annotation(sanss.ywyx.config.druid.DataSource)"
            + "|| @within(sanss.ywyx.config.druid.DataSource)")
    public void dsPointCut()
    {

    }

    @Around("dsPointCut()")
    public Object around(ProceedingJoinPoint point) throws Throwable
    {
        DataSource dataSource = getDataSource(point);

        if (StringUtils.isNotNull(dataSource))
        {
            DynamicDataSourceContextHolder.setDataSourceType(dataSource.value().name());
        }

        try
        {
            return point.proceed();
        }
        finally
        {
            // 销毁数据源 在执行方法之后
            DynamicDataSourceContextHolder.clearDataSourceType();
        }
    }

    
    public DataSource getDataSource(ProceedingJoinPoint point)
    {
        MethodSignature signature = (MethodSignature) point.getSignature();
        DataSource dataSource = AnnotationUtils.findAnnotation(signature.getMethod(), DataSource.class);
        if (Objects.nonNull(dataSource))
        {
            return dataSource;
        }

        return AnnotationUtils.findAnnotation(signature.getDeclaringType(), DataSource.class);
    }
}

10、yml配置

datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: org.postgresql.Driver
    druid:
      # 主库数据源
      master:
        url: 
        username: 
        password: 
      # 从库数据源
      slave:
        # 从数据源开关/默认关闭
        enabled: true
        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 version()
      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: admin
        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

到此这篇关于springboot配置druid多数据源的示例代码的文章就介绍到这了,更多相关springboot druid多数据源内容请搜索编程网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编程网！

文章详情

springboot配置druid多数据源的示例代码

目录

1、配置多数据源所需要的jar

2、配置多数据源所需要的工具类

3、DataSourceType 枚举类

4、DruidProperties druid 配置属性

5、DruidConfig druid 配置多数据源

7、DynamicDataSourceContextHolder 数据源切换处理

8、DataSource 自定义多数据源切换注解

9、DataSourceAspect 多数据源处理

10、yml配置

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