由于springboot2更新了绑定参数的api,部分springboot1用于绑定的工具类如RelaxedPropertyResolver已经无法在新版本中使用。本文实现参考了IT虾米网这篇文章,大致思路是一致的,如果需要详细实现可以参考。都是通过AbstractRoutingDataSource实现动态数据源的切换,以前我用spring配置多数据源的时候就是通过它实现的,有兴趣的可以了解下其原理,这里就不多赘述了。

废话不多说了,先上数据源注册工具类,springboot2与1的主要区别也就在这:

MultiDataSourceRegister.java:

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package top.ivan.demo.springboot.mapper; 

import com.zaxxer.hikari.HikariDataSource;
import org.springframework.beans.MutablePropertyValues;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.GenericBeanDefinition;
import org.springframework.boot.context.properties.bind.Bindable;
import org.springframework.boot.context.properties.bind.Binder;
import org.springframework.boot.context.properties.source.ConfigurationPropertyName;
import org.springframework.boot.context.properties.source.ConfigurationPropertyNameAliases;
import org.springframework.boot.context.properties.source.ConfigurationPropertySource;
import org.springframework.boot.context.properties.source.MapConfigurationPropertySource;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.env.Environment;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.util.StringUtils;

import javax.sql.DataSource;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MultiDataSourceRegister implements EnvironmentAware, ImportBeanDefinitionRegistrar {

</span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">final</span> <span style="color: #0000ff;">static</span> ConfigurationPropertyNameAliases aliases = <span style="color: #0000ff;">new</span> ConfigurationPropertyNameAliases(); <span style="color: #008000;">//</span><span style="color: #008000;">别名</span> 
 
<span style="color: #0000ff;">static</span><span style="color: #000000;"> { 
    </span><span style="color: #008000;">//</span><span style="color: #008000;">由于部分数据源配置不同,所以在此处添加别名,避免切换数据源出现某些参数无法注入的情况</span> 
    aliases.addAliases("url", <span style="color: #0000ff;">new</span> String[]{"jdbc-url"<span style="color: #000000;">}); 
    aliases.addAliases(</span>"username", <span style="color: #0000ff;">new</span> String[]{"user"<span style="color: #000000;">}); 
} 
 
</span><span style="color: #0000ff;">private</span> Environment evn; <span style="color: #008000;">//</span><span style="color: #008000;">配置上下文(也可以理解为配置文件的获取工具)</span> 
 
<span style="color: #0000ff;">private</span> Map&lt;String, DataSource&gt; sourceMap;  <span style="color: #008000;">//</span><span style="color: #008000;">数据源列表</span> 
 
<span style="color: #0000ff;">private</span> Binder binder; <span style="color: #008000;">//</span><span style="color: #008000;">参数绑定工具</span> 
 
<span style="color: #008000;">/**</span><span style="color: #008000;"> 
 * ImportBeanDefinitionRegistrar接口的实现方法,通过该方法可以按照自己的方式注册bean 
 * 
 * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> annotationMetadata 
 * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> beanDefinitionRegistry 
 </span><span style="color: #008000;">*/</span><span style="color: #000000;"> 
@Override 
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> registerBeanDefinitions(AnnotationMetadata annotationMetadata, BeanDefinitionRegistry beanDefinitionRegistry) { 
    Map config, properties, defaultConfig </span>= binder.bind("spring.datasource", Map.<span style="color: #0000ff;">class</span>).get(); <span style="color: #008000;">//</span><span style="color: #008000;">获取所有数据源配置</span> 
    sourceMap = <span style="color: #0000ff;">new</span> HashMap&lt;&gt;(); <span style="color: #008000;">//</span><span style="color: #008000;">默认配置</span> 
    properties =<span style="color: #000000;"> defaultConfig; 
    String typeStr </span>= evn.getProperty("spring.datasource.type"); <span style="color: #008000;">//</span><span style="color: #008000;">默认数据源类型</span> 
    Class&lt;? <span style="color: #0000ff;">extends</span> DataSource&gt; clazz = getDataSourceType(typeStr); <span style="color: #008000;">//</span><span style="color: #008000;">获取数据源类型</span> 
    DataSource consumerDatasource, defaultDatasource = bind(clazz, properties); <span style="color: #008000;">//</span><span style="color: #008000;">绑定默认数据源参数</span> 
    List&lt;Map&gt; configs = binder.bind("spring.datasource.multi", Bindable.listOf(Map.<span style="color: #0000ff;">class</span>)).get(); <span style="color: #008000;">//</span><span style="color: #008000;">获取其他数据源配置</span> 
    <span style="color: #0000ff;">for</span> (<span style="color: #0000ff;">int</span> i = 0; i &lt; configs.size(); i++) { <span style="color: #008000;">//</span><span style="color: #008000;">遍历生成其他数据源</span> 
        config =<span style="color: #000000;"> configs.get(i); 
        clazz </span>= getDataSourceType((String) config.get("type"<span style="color: #000000;">)); 
        </span><span style="color: #0000ff;">if</span> ((<span style="color: #0000ff;">boolean</span>) config.getOrDefault("extend", Boolean.TRUE)) { <span style="color: #008000;">//</span><span style="color: #008000;">获取extend字段,未定义或为true则为继承状态</span> 
            properties = <span style="color: #0000ff;">new</span> HashMap(defaultConfig); <span style="color: #008000;">//</span><span style="color: #008000;">继承默认数据源配置</span> 
            properties.putAll(config); <span style="color: #008000;">//</span><span style="color: #008000;">添加数据源参数</span> 
        } <span style="color: #0000ff;">else</span><span style="color: #000000;"> { 
            properties </span>= config; <span style="color: #008000;">//</span><span style="color: #008000;">不继承默认配置</span> 

}
consumerDatasource
= bind(clazz, properties); //绑定参数
sourceMap.put(config.get("key").toString(), consumerDatasource); //获取数据源的key,以便通过该key可以定位到数据源
}
GenericBeanDefinition define
= new GenericBeanDefinition(); //bean定义类
define.setBeanClass(MultiDataSource.class); //设置bean的类型,此处MultiDataSource是继承AbstractRoutingDataSource的实现类
MutablePropertyValues mpv = define.getPropertyValues(); //需要注入的参数,类似spring配置文件中的<property/>
mpv.add("defaultTargetDataSource", defaultDatasource); //添加默认数据源,避免key不存在的情况没有数据源可用
mpv.add("targetDataSources", sourceMap); //添加其他数据源
beanDefinitionRegistry.registerBeanDefinition("datasource", define); //将该bean注册为datasource,不使用springboot自动生成的datasource
}

</span><span style="color: #008000;">/**</span><span style="color: #008000;"> 
 * 通过字符串获取数据源class对象 
 * 
 * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> typeStr 
 * </span><span style="color: #808080;">@return</span> 
 <span style="color: #008000;">*/</span> 
<span style="color: #0000ff;">private</span> Class&lt;? <span style="color: #0000ff;">extends</span> DataSource&gt;<span style="color: #000000;"> getDataSourceType(String typeStr) { 
    Class</span>&lt;? <span style="color: #0000ff;">extends</span> DataSource&gt;<span style="color: #000000;"> type; 
    </span><span style="color: #0000ff;">try</span><span style="color: #000000;"> { 
        </span><span style="color: #0000ff;">if</span> (StringUtils.hasLength(typeStr)) { <span style="color: #008000;">//</span><span style="color: #008000;">字符串不为空则通过反射获取class对象</span> 
            type = (Class&lt;? <span style="color: #0000ff;">extends</span> DataSource&gt;<span style="color: #000000;">) Class.forName(typeStr); 
        } </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> { 
            type </span>= HikariDataSource.<span style="color: #0000ff;">class</span>;  <span style="color: #008000;">//</span><span style="color: #008000;">默认为hikariCP数据源,与springboot默认数据源保持一致</span> 

}
return type;
}
catch (Exception e) {
throw new IllegalArgumentException("can not resolve class with type: " + typeStr); //无法通过反射获取class对象的情况则抛出异常,该情况一般是写错了,所以此次抛出一个runtimeexception
}
}

</span><span style="color: #008000;">/**</span><span style="color: #008000;"> 
 * 绑定参数,以下三个方法都是参考DataSourceBuilder的bind方法实现的,目的是尽量保证我们自己添加的数据源构造过程与springboot保持一致 
 * 
 * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> result 
 * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> properties 
 </span><span style="color: #008000;">*/</span> 
<span style="color: #0000ff;">private</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> bind(DataSource result, Map properties) { 
    ConfigurationPropertySource source </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> MapConfigurationPropertySource(properties); 
    Binder binder </span>= <span style="color: #0000ff;">new</span> Binder(<span style="color: #0000ff;">new</span><span style="color: #000000;"> ConfigurationPropertySource[]{source.withAliases(aliases)}); 
    binder.bind(ConfigurationPropertyName.EMPTY, Bindable.ofInstance(result));  </span><span style="color: #008000;">//</span><span style="color: #008000;">将参数绑定到对象</span> 

}

</span><span style="color: #0000ff;">private</span> &lt;T <span style="color: #0000ff;">extends</span> DataSource&gt; T bind(Class&lt;T&gt;<span style="color: #000000;"> clazz, Map properties) { 
    ConfigurationPropertySource source </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> MapConfigurationPropertySource(properties); 
    Binder binder </span>= <span style="color: #0000ff;">new</span> Binder(<span style="color: #0000ff;">new</span><span style="color: #000000;"> ConfigurationPropertySource[]{source.withAliases(aliases)}); 
    </span><span style="color: #0000ff;">return</span> binder.bind(ConfigurationPropertyName.EMPTY, Bindable.of(clazz)).get(); <span style="color: #008000;">//</span><span style="color: #008000;">通过类型绑定参数并获得实例对象</span> 

}

</span><span style="color: #008000;">/**</span><span style="color: #008000;"> 
 * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> clazz 
 * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> sourcePath 参数路径,对应配置文件中的值,如: spring.datasource 
 * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> &lt;T&gt; 
 * </span><span style="color: #808080;">@return</span> 
 <span style="color: #008000;">*/</span> 
<span style="color: #0000ff;">private</span> &lt;T <span style="color: #0000ff;">extends</span> DataSource&gt; T bind(Class&lt;T&gt;<span style="color: #000000;"> clazz, String sourcePath) { 
    Map properties </span>= binder.bind(sourcePath, Map.<span style="color: #0000ff;">class</span><span style="color: #000000;">).get(); 
    </span><span style="color: #0000ff;">return</span><span style="color: #000000;"> bind(clazz, properties); 
} 
 
</span><span style="color: #008000;">/**</span><span style="color: #008000;"> 
 * EnvironmentAware接口的实现方法,通过aware的方式注入,此处是environment对象 
 * 
 * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> environment 
 </span><span style="color: #008000;">*/</span><span style="color: #000000;"> 
@Override 
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> setEnvironment(Environment environment) { 
    </span><span style="color: #0000ff;">this</span>.evn =<span style="color: #000000;"> environment; 
    binder </span>= Binder.get(evn); <span style="color: #008000;">//</span><span style="color: #008000;">绑定配置器</span> 

}
}

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此处放出我的配置文件application.yml :

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spring: 
  datasource: 
    password: 123456 
    url: jdbc:mysql://127.0.0.1:3306/graduation_project?useUnicode=true&characterEncoding=UTF-8 
    driver-class-name: com.mysql.jdbc.Driver 
    username: ivan 
    openMulti: true 
    type: com.zaxxer.hikari.HikariDataSource 
    idle-timeout: 30000 
    multi: 
    - key: default1 
      password: 123456 
      url: jdbc:mysql://127.0.0.1:3306/graduation_project?useUnicode=true&characterEncoding=UTF-8 
      idle-timeout: 20000 
      driver-class-name: com.mysql.jdbc.Driver 
      username: ivan 
      type: com.alibaba.druid.pool.DruidDataSource 
    - key: gd 
      password: 123456 
      url: jdbc:mysql://gd.badtheway.xin:****/graduation_project?useUnicode=true&characterEncoding=UTF-8 
      driver-class-name: com.mysql.jdbc.Driver 
      username: ivan 
mybatis: 
  config-location: classpath:mapper/configure.xml 
  mapper-locations: classpath:mapper/*Mapper.xml
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这边说明一下,spring.datasource路径下的配置即默认数据源的配置,我是为了个人美感以及方便,所以在配置多数据源时使用spring.datasource.multi这个路径,假如需要更改的话修改MultiDataSourceRegister.java里面相应的值就可以了。

最后别忘了在@SpringBootApplication加上@Import(MultiDataSourceRegister.class)

下面是我自己使用的一些切面配置,通过@MultiDataSource$DataSource注解标记需要切换数据源的类,可以通过方法体参数->方法注解->类注解实现切换数据源。供大家参考:

MultiDataSource.java:

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package top.ivan.demo.springboot.mapper; 

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.springframework.core.annotation.Order;
import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import java.lang.annotation.*;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.util.Map;
import java.util.Set;

public class MultiDataSource extends AbstractRoutingDataSource {

</span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">final</span> <span style="color: #0000ff;">static</span> ThreadLocal&lt;String&gt; DATA_SOURCE_KEY = <span style="color: #0000ff;">new</span> ThreadLocal&lt;&gt;(); <span style="color: #008000;">//</span><span style="color: #008000;">保存当前线程的数据源对应的key</span> 
 
<span style="color: #0000ff;">private</span> Set&lt;Object&gt; keySet;  <span style="color: #008000;">//</span><span style="color: #008000;">所有数据源的key集合</span> 
 
<span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> switchSource(String key) { 
    DATA_SOURCE_KEY.set(key); </span><span style="color: #008000;">//</span><span style="color: #008000;">切换当先线程的key</span> 

}

</span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> clear() { 
    DATA_SOURCE_KEY.remove(); </span><span style="color: #008000;">//</span><span style="color: #008000;">移除key值</span> 

}

</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> Object execute(String ds, Run run) <span style="color: #0000ff;">throws</span><span style="color: #000000;"> Throwable { 
    switchSource(ds); 
    </span><span style="color: #0000ff;">try</span><span style="color: #000000;"> { 
        </span><span style="color: #0000ff;">return</span><span style="color: #000000;"> run.run(); 
    } </span><span style="color: #0000ff;">finally</span><span style="color: #000000;"> { 
        clear(); 
    } 
} 
 
</span><span style="color: #008000;">//</span><span style="color: #008000;">AbstractRoutingDataSource抽象类实现方法,即获取当前线程数据源的key</span> 

@Override
protected Object determineCurrentLookupKey() {
String key
= DATA_SOURCE_KEY.get();
if (!keySet.contains(key)) {
logger.info(String.format(
"can not found datasource by key: '%s',this session may use default datasource", key));
}
return key;
}

</span><span style="color: #008000;">/**</span><span style="color: #008000;"> 
 * 在获取key的集合,目的只是为了添加一些告警日志 
 </span><span style="color: #008000;">*/</span><span style="color: #000000;"> 
@Override 
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> afterPropertiesSet() { 
    </span><span style="color: #0000ff;">super</span><span style="color: #000000;">.afterPropertiesSet(); 
    </span><span style="color: #0000ff;">try</span><span style="color: #000000;"> { 
        Field sourceMapField </span>= AbstractRoutingDataSource.<span style="color: #0000ff;">class</span>.getDeclaredField("resolvedDataSources"<span style="color: #000000;">); 
        sourceMapField.setAccessible(</span><span style="color: #0000ff;">true</span><span style="color: #000000;">); 
        Map</span>&lt;Object, javax.sql.DataSource&gt; sourceMap = (Map&lt;Object, javax.sql.DataSource&gt;) sourceMapField.get(<span style="color: #0000ff;">this</span><span style="color: #000000;">); 
        </span><span style="color: #0000ff;">this</span>.keySet =<span style="color: #000000;"> sourceMap.keySet(); 
        sourceMapField.setAccessible(</span><span style="color: #0000ff;">false</span><span style="color: #000000;">); 
    } </span><span style="color: #0000ff;">catch</span> (NoSuchFieldException |<span style="color: #000000;"> IllegalAccessException e) { 
        e.printStackTrace(); 
    } 
 
} 
 
</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">interface</span><span style="color: #000000;"> Run { 
    Object run() </span><span style="color: #0000ff;">throws</span><span style="color: #000000;"> Throwable; 
} 
 
</span><span style="color: #008000;">/**</span><span style="color: #008000;"> 
 * 用于获取AOP切点及数据源key的注解 
 </span><span style="color: #008000;">*/</span><span style="color: #000000;"> 
@Target({ElementType.METHOD, ElementType.TYPE, ElementType.PARAMETER}) 
@Retention(RetentionPolicy.RUNTIME) 
@Documented 
</span><span style="color: #0000ff;">public</span> @<span style="color: #0000ff;">interface</span><span style="color: #000000;"> DataSource { 
    String value() </span><span style="color: #0000ff;">default</span> ""; <span style="color: #008000;">//</span><span style="color: #008000;">该值即key值</span> 

}

</span><span style="color: #008000;">/**</span><span style="color: #008000;"> 
 * 声明切面 
 </span><span style="color: #008000;">*/</span><span style="color: #000000;"> 
@Component 
@Aspect 
@Order(</span>-10)  <span style="color: #008000;">//</span><span style="color: #008000;">使该切面在事务之前执行</span> 
<span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> DataSourceSwitchInterceptor { 
 
    </span><span style="color: #008000;">/**</span><span style="color: #008000;"> 
     * 扫描所有含有@MultiDataSource$DataSource注解的类 
     </span><span style="color: #008000;">*/</span><span style="color: #000000;"> 
    @Pointcut(</span>"@within(top.ivan.demo.springboot.mapper.MultiDataSource.DataSource)"<span style="color: #000000;">) 
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> switchDataSource() { 
    } 
 
    </span><span style="color: #008000;">/**</span><span style="color: #008000;"> 
     * 使用around方式监控 
     * </span><span style="color: #808080;">@param</span><span style="color: #008000;"> point 
     * </span><span style="color: #808080;">@return</span><span style="color: #008000;"> 
     * </span><span style="color: #808080;">@throws</span><span style="color: #008000;"> Throwable 
     </span><span style="color: #008000;">*/</span><span style="color: #000000;"> 
    @Around(</span>"switchDataSource()"<span style="color: #000000;">) 
    </span><span style="color: #0000ff;">public</span> Object switchByMethod(ProceedingJoinPoint point) <span style="color: #0000ff;">throws</span><span style="color: #000000;"> Throwable { 
        Method method </span>= getMethodByPoint(point); <span style="color: #008000;">//</span><span style="color: #008000;">获取执行方法</span> 
        Parameter[] params = method.getParameters(); <span style="color: #008000;">//</span><span style="color: #008000;">获取执行参数</span> 

Parameter parameter;
String source
= null;
boolean isDynamic = false;
for (int i = params.length - 1; i >= 0; i--) { //扫描是否有参数带有@DataSource注解
parameter = params[i];
if (parameter.getAnnotation(DataSource.class) != null && point.getArgs()[i] instanceof String) {
source
= (String) point.getArgs()[i]; //key值即该参数的值,要求该参数必须为String类型
isDynamic = true;
break;
}
}
if (!isDynamic) { //不存在参数带有Datasource注解
DataSource dataSource = method.getAnnotation(DataSource.class); //获取方法的@DataSource注解
if (null == dataSource || !StringUtils.hasLength(dataSource.value())) { //方法不含有注解
dataSource = method.getDeclaringClass().getAnnotation(DataSource.class); //获取类级别的@DataSource注解
}
if (null != dataSource) {
source
= dataSource.value(); //设置key值
}
}
return persistBySource(source, point); //继续执行该方法
}

    </span><span style="color: #0000ff;">private</span> Object persistBySource(String source, ProceedingJoinPoint point) <span style="color: #0000ff;">throws</span><span style="color: #000000;"> Throwable { 
        </span><span style="color: #0000ff;">try</span><span style="color: #000000;"> { 
            switchSource(source); </span><span style="color: #008000;">//</span><span style="color: #008000;">切换数据源</span> 
            <span style="color: #0000ff;">return</span> point.proceed(); <span style="color: #008000;">//</span><span style="color: #008000;">执行</span> 
        } <span style="color: #0000ff;">finally</span><span style="color: #000000;"> { 
            clear(); </span><span style="color: #008000;">//</span><span style="color: #008000;">清空key值</span> 

}
}

    </span><span style="color: #0000ff;">private</span><span style="color: #000000;"> Method getMethodByPoint(ProceedingJoinPoint point) { 
        MethodSignature methodSignature </span>=<span style="color: #000000;"> (MethodSignature) point.getSignature(); 
        </span><span style="color: #0000ff;">return</span><span style="color: #000000;"> methodSignature.getMethod(); 
    } 
} 

}

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示例:

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package top.ivan.demo.springboot.mapper; 

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import top.ivan.demo.springboot.pojo.ProductPreview;

import java.util.List;

@Mapper
@MultiDataSource.DataSource("ds1")
public interface PreviewMapper {

</span><span style="color: #008000;">//</span><span style="color: #008000;">使用ds的值作为key</span> 
List&lt;ProductPreview&gt; getList(@Param("start") <span style="color: #0000ff;">int</span> start, @Param("count") <span style="color: #0000ff;">int</span><span style="color: #000000;"> count, @MultiDataSource.DataSource String ds); 
 
</span><span style="color: #008000;">//</span><span style="color: #008000;">使用“ds2”作为key</span> 
@MultiDataSource.DataSource("ds2"<span style="color: #000000;">) 
List</span>&lt;ProductPreview&gt; getList2(@Param("start") <span style="color: #0000ff;">int</span> start, @Param("count") <span style="color: #0000ff;">int</span><span style="color: #000000;"> count); 
 
</span><span style="color: #008000;">//</span><span style="color: #008000;">使用“ds1”作为key</span> 
List&lt;ProductPreview&gt; getList3(@Param("start") <span style="color: #0000ff;">int</span> start, @Param("count") <span style="color: #0000ff;">int</span><span style="color: #000000;"> count); 

}

复制代码

这几天刚接触springboot,还处于小白的状态,假如有什么问题的话欢迎大家指教

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附上源码文件: IT虾米网

原文地址:https://www.cnblogs.com/badtheway/p/9061065.html

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