springboot如何动态调用实现类

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springboot动态调用实现类

定义规则的多种类型

/** * 数据规则处理类型枚举 */public enum RuleType {    MYRULEBYID1，    MYRULEBYID2}

接口

import java.util.List;import java.util.Map; public interface DataRuleParse {    /**     * 获取规则处理的类型     * @return     */      RuleType getRuleType();     /**     * 根据规则处理类型生成sql     * @return     */   List getSQl( Map paramMap);}

实现类，规则类型1

package gds.application.masterdata.DataRuleParse; import gds.application.common.constants.ConnectorConstants;import gds.application.common.constants.XmlConfigurationContants;import gds.application.common.util.ApplicationContextUtil;import gds.application.masterdata.constants.ConnectDataProcessesConstants;import gds.application.masterdata.service.impl.BatchExecutionSqlServiceImpl;import org.springframework.stereotype.Component;  import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map; @Componentpublic class MYRULEBYID1 implements DataRuleParse{       @Override    public RuleType getRuleType() {        return RuleType.MYRULEBYID1;    }     @Override    public List getSQl( Map paramMap) {       //规则1实现方法        return null;    }

实现类，规则类型2

package gds.application.masterdata.DataRuleParse; import gds.application.common.constants.ConnectorConstants;import gds.application.common.constants.XmlConfigurationContants;import gds.application.common.util.ApplicationContextUtil;import gds.application.masterdata.constants.ConnectDataProcessesConstants;import gds.application.masterdata.service.impl.BatchExecutionSqlServiceImpl;import org.springframework.stereotype.Component;  import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map; @Componentpublic class MYRULEBYID2 implements DataRuleParse{       @Override    public RuleType getRuleType() {        return RuleType.MYRULEBYID2;    }     @Override    public List getSQl( Map paramMap) {       //规则2实现方法        return null;    }

工厂类，调用方法获取具体实现类

import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;import org.springframework.stereotype.Component; import java.util.HashMap;import java.util.Map; /** * 规则转换工厂类 */@Componentpublic class DataRuleParseFactory implements ApplicationContextAware {    private static Map dataRuleBeanMap;    @Override    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException{        Map map = applicationContext.getBeansOfType(DataRuleParse.class);        dataRuleBeanMap = new HashMap();        map.forEach((key, value) -> dataRuleBeanMap.put(value.getRuleType().toString(), value));    }     public static  T getTrafficMode(String ruleType) {        return (T)dataRuleBeanMap.get(ruleType);    }}

根据参数获取对应的方法,ruleName为MYRULEBYID1或者MYRULEBYID2

  DataRuleParse dataRuleParse= DataRuleParseFactory.getTrafficMode(ruleName);  List sqlList=dataRuleParse.getSQl(paramMap);

springboot手动获取实现类

import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;WebApplicationContext cxt = WebApplicationContextUtils.getWebApplicationContext(sc);weixinService = (IWeixinService) cxt.getBean("IWeixinService");qqService = (IQQService) cxt.getBean("IQQService");

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