java如何设置动态表名？

1，加一个switch配置：

package com.youku.nintendo.common;


import com.alibaba.boot.switchcenter.annotation.SwitchGroup;
import com.google.common.collect.Sets;
import com.taobao.csp.switchcenter.annotation.AppSwitch;
import com.taobao.csp.switchcenter.bean.Switch;

import java.util.Set;

@SwitchGroup(appName = "nintendo-youku-admin")
public class BaseSwitchers {

    @AppSwitch(des = "需要根据环境切换表名的表", level = Switch.Level.p4)
    public static Set<String> needSwitchEnvTableNames = Sets.newHashSet("push_material","push_strategy_instance","push_strategy");

}

2，获取环境，为了不同环境调不同的表：

@Configuration
public class NintendoEnv {

    @Value("${env}")
    private String env;

    private static NintendoEnv instance;

    @PostConstruct
    public void setInstance(){
        instance = this;
    }

    public static String getEnv(){
        return instance.env;
    }

    public static boolean isPub(){
        return "pub".equals(instance.env);
    }

    public static boolean isPre(){
        return "pre".equals(instance.env);
    }
}

3，设置动态表名：

import com.youku.nintendo.common.BaseSwitchers;
import com.youku.nintendo.common.NintendoEnv;
import org.springframework.stereotype.Service;

/**
 * @ClassName TableNameManager.java
 * @Description
 */
@Service
public class TableNameManager {

    public String getTableName(String originTableName){
        if (BaseSwitchers.needSwitchEnvTableNames.contains(originTableName) && NintendoEnv.isPre()){
            String env = NintendoEnv.getEnv();
            return originTableName + "_" + env;
        }else {
            return originTableName;
        }
    }

}

4，在 MybatisConfig 里调用TableNameManager，设置一下即可：

package com.youku.nintendo.config;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.DynamicTableNameInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import com.youku.nintendo.dal.config.TableNameManager;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.annotation.Resource;

/**
 * @ClassName MybatisConfig.java
 * @Description mybatis配置
 */
@Configuration
@MapperScan("com.youku.nintendo.dal")
public class MybatisConfig {

    @Resource
    private TableNameManager tableNameManager;

    /**
     * 添加分页插件
     */
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        DynamicTableNameInnerInterceptor dynamicTableNameInnerInterceptor = new DynamicTableNameInnerInterceptor();
        dynamicTableNameInnerInterceptor.setTableNameHandler((sql, tableName) -> tableNameManager.getTableName(tableName));
        interceptor.addInnerInterceptor(dynamicTableNameInnerInterceptor);
        //如果配置多个插件,切记分页最后添加
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        return interceptor;
    }
}