CREATE TABLE `sys_dict`(
    `id` INT(10) NOT NULL AUTO_INCREMENT COMMENT ‘主键id‘,
    `dict_type` VARCHAR(50) NOT NULL DEFAULT ‘‘ COMMENT ‘字典类型‘,
    `dict_key` INT(10) NOT NULL DEFAULT ‘0‘ COMMENT ‘字典key‘,
    `dict_value` VARCHAR(50) NOT NULL DEFAULT ‘‘ COMMENT ‘字典value‘,
    `sort` INT(10) NOT NULL DEFAULT ‘0‘ COMMENT ‘字典排序值‘,
    `add_uid` INT(10) NOT NULL DEFAULT ‘0‘ COMMENT ‘添加人‘,
    `update_uid` INT(10) NOT NULL DEFAULT ‘0‘ COMMENT ‘更新人‘,
    `add_time` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT ‘创建时间‘,
    `update_time` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT ‘更新时间‘, 
    `del_flag` TINYINT(4) NOT NULL DEFAULT ‘0‘ COMMENT ‘删除标记‘,
    `remark` VARCHAR(100) NOT NULL DEFAULT ‘‘ COMMENT ‘备注‘,
    PRIMARY KEY (`id`) 
)ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 COMMENT=‘数据字典表‘;

public class DictUtils {

    private static SysDictMapper sysDictMapper = SpringContextUtils.getBeanByClass(SysDictMapper.class);

    public static SysDictPo getDict(String dictType, Integer dictKey) {
        SysDictPo sysDictPo = new SysDictPo();
        sysDictPo.setDictType(dictType);
        sysDictPo.setDictKey(dictKey);
        return sysDictMapper.selectByTypeAndKey(sysDictPo);
    }

    public static String getDictValue(String dictType, Integer dictKey) {
        SysDictPo query = getDict(dictType, dictKey);
        if (query != null) {
            return query.getDictValue();
        }
        return null;
    }
}

String value = http://www.mamicode.com/DictUtils.getDictValue("switch",0);
Boolean switch = Boolean.valueOf(value);
if(switch){
  //......   
}else{
  //.....
}