上海商务网站建设,百度认证官网,哪个软件制作视频比较好,网站建设 m.ykn.cc今天偶然遇到一个fastjson将字符串反序列化为一个对象的时候的问题#xff0c;就是简单的通过com.alibaba.fastjson.JSON将对象转为字符串#xff0c;然后再从字符串转换为原类型的对象。
涉及的代码也非常简单
package cn.edu.sgu.www.mhxysy.service.role.impl;import cn…今天偶然遇到一个fastjson将字符串反序列化为一个对象的时候的问题就是简单的通过com.alibaba.fastjson.JSON将对象转为字符串然后再从字符串转换为原类型的对象。
涉及的代码也非常简单
package cn.edu.sgu.www.mhxysy.service.role.impl;import cn.edu.sgu.www.mhxysy.consts.RedisKeyPrefixConst;
import cn.edu.sgu.www.mhxysy.entity.role.AdvancedProperty;
import cn.edu.sgu.www.mhxysy.observe.observer.Observer;
import cn.edu.sgu.www.mhxysy.observe.subject.Subject;
import cn.edu.sgu.www.mhxysy.redis.StringRedisUtils;
import cn.edu.sgu.www.mhxysy.service.role.AdvancedPropertyService;
import com.alibaba.fastjson.JSON;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;/*** author heyunlin* version 1.0*/
Service
public class AdvancedPropertyServiceImpl implements AdvancedPropertyService {private final StringRedisUtils stringRedisUtils;private final Subject advancedPropertySubject;private final Observer advancedPropertyObserver;Autowiredpublic AdvancedPropertyServiceImpl(StringRedisUtils stringRedisUtils,Subject advancedPropertySubject,Observer advancedPropertyObserver) {this.stringRedisUtils stringRedisUtils;this.advancedPropertySubject advancedPropertySubject;this.advancedPropertyObserver advancedPropertyObserver;}Overridepublic AdvancedProperty selectByRoleId(String roleId) {String key RedisKeyPrefixConst.PREFIX_ADVANCED_PROPERTY roleId;// 没有命中缓存if (!stringRedisUtils.hasKey(key)) {advancedPropertySubject.addObserver(advancedPropertyObserver);advancedPropertySubject.notice(roleId);}String data stringRedisUtils.get(key);Object object JSON.parse(data);return (AdvancedProperty) object;}}
这里应用了观察者模式如果查询没有命中缓存就会主动触发主题的通知方法notice()最后会调用具体观察者的update()方法
package cn.edu.sgu.www.mhxysy.observe.observer;import cn.edu.sgu.www.mhxysy.consts.RedisKeyPrefixConst;
import cn.edu.sgu.www.mhxysy.dto.xingyin.XingyinAttributeDTO;
import cn.edu.sgu.www.mhxysy.entity.equipment.Equipment;
import cn.edu.sgu.www.mhxysy.entity.equipment.EquipmentTexiao;
import cn.edu.sgu.www.mhxysy.entity.role.AdvancedProperty;
import cn.edu.sgu.www.mhxysy.entity.xingyin.Xingyin;
import cn.edu.sgu.www.mhxysy.enums.WearStatus;
import cn.edu.sgu.www.mhxysy.mapper.baoshi.BaoshiMapper;
import cn.edu.sgu.www.mhxysy.mapper.equipment.EquipmentMapper;
import cn.edu.sgu.www.mhxysy.mapper.equipment.EquipmentTexiaoMapper;
import cn.edu.sgu.www.mhxysy.mapper.role.AdvancedPropertyMapper;
import cn.edu.sgu.www.mhxysy.mapper.xingyin.XingyinAttributeMapper;
import cn.edu.sgu.www.mhxysy.mapper.xingyin.XingyinMapper;
import cn.edu.sgu.www.mhxysy.redis.StringRedisUtils;
import cn.edu.sgu.www.mhxysy.vo.AttributeVO;
import cn.edu.sgu.www.mhxysy.vo.baoshi.BaoshiXiangqianVO;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;/*** 具体观察者-角色高级属性观察者* author heyunlin* version 1.0*/
Component
public class AdvancedPropertyObserver implements Observer {private final BaoshiMapper baoshiMapper;private final XingyinMapper xingyinMapper;private final EquipmentMapper equipmentMapper;private final StringRedisUtils stringRedisUtils;private final EquipmentTexiaoMapper equipmentTexiaoMapper;private final XingyinAttributeMapper xingyinAttributeMapper;private final AdvancedPropertyMapper advancedPropertyMapper;Autowiredpublic AdvancedPropertyObserver(BaoshiMapper baoshiMapper,XingyinMapper xingyinMapper,EquipmentMapper equipmentMapper,StringRedisUtils stringRedisUtils,EquipmentTexiaoMapper equipmentTexiaoMapper,XingyinAttributeMapper xingyinAttributeMapper,AdvancedPropertyMapper advancedPropertyMapper) {this.baoshiMapper baoshiMapper;this.xingyinMapper xingyinMapper;this.equipmentMapper equipmentMapper;this.stringRedisUtils stringRedisUtils;this.equipmentTexiaoMapper equipmentTexiaoMapper;this.xingyinAttributeMapper xingyinAttributeMapper;this.advancedPropertyMapper advancedPropertyMapper;}Overridepublic void update(Object message) {String roleId (String) message;AdvancedProperty advancedProperty advancedPropertyMapper.selectByRoleId(roleId);advancedProperty.setRoleId(roleId);/** 物理暴击*/AtomicInteger wlbj new AtomicInteger(0);/** 物理抗暴*/AtomicInteger wlkb new AtomicInteger(0);/** 法术暴击*/AtomicInteger fsbj new AtomicInteger(0);/** 法术抗暴*/AtomicInteger fskb new AtomicInteger(0);/** 忽视物防*/AtomicInteger hswf new AtomicInteger(0);/** 忽视法防*/AtomicInteger hsff new AtomicInteger(0);/** 封印命中*/AtomicInteger fymz new AtomicInteger(0);/** 抵抗封印*/AtomicInteger dkfy new AtomicInteger(advancedProperty.getDkfy());// 星印附加属性/** 物暴伤害*/AtomicInteger wbsh new AtomicInteger(0);/** 法暴伤害*/AtomicInteger fbsh new AtomicInteger(0);/** 物理抵抗*/AtomicInteger wldk new AtomicInteger(0);/** 法术抵抗*/AtomicInteger fsdk new AtomicInteger(0);/** 回复强度*/AtomicInteger hfqd new AtomicInteger(0);// todo 查询高级属性并赋值// 查询角色穿戴的装备QueryWrapperEquipment wrapper new QueryWrapper();wrapper.eq(role_id, roleId);wrapper.eq(wear_status, WearStatus.YCD.getValue());ListEquipment list equipmentMapper.selectList(wrapper);if(!list.isEmpty()) {// 装备特效增加的属性for (Equipment equipment : list) {EquipmentTexiao texiao equipmentTexiaoMapper.selectById(equipment.getTexiaoId());java.lang.String name texiao.getName();switch (name) {case 物理暴击1%:wlbj.addAndGet(1);break;case 物理抗暴2%:wlkb.addAndGet(2);break;case 法术暴击1%:fsbj.addAndGet(1);break;case 法术抗暴2%:fsbj.addAndGet(2);break;case 封印命中1%:fymz.addAndGet(10);break;case 抵抗封印1%:dkfy.addAndGet(10);break;case 忽视物防2%:hswf.addAndGet(2);break;case 忽视法防2%:hsff.addAndGet(2);break;default:break;}// 查询角色装备上镶嵌的宝石红纹石封印命中、神秘石抵抗封印ListBaoshiXiangqianVO attributes baoshiMapper.selectAttributes(equipment.getId());for (BaoshiXiangqianVO attribute : attributes) {if (抵抗封印.equals(attribute.getPropertyName())) {dkfy.addAndGet(attribute.getGrade() * attribute.getPropertyValue());} else if (封印命中.equals(attribute.getPropertyName())) {fymz.addAndGet(attribute.getGrade() * attribute.getPropertyValue());}}}}// 查询角色穿戴的星印Mapjava.lang.String, Object map new HashMap();map.put(role_id, roleId);map.put(wear_state, WearStatus.YCD.getValue());ListXingyin xingyinList xingyinMapper.selectByMap(map);if (!xingyinList.isEmpty()) {// 获取星印的属性XingyinAttributeDTO xingyinAttributeDTO new XingyinAttributeDTO();for (Xingyin xingyin : xingyinList) {xingyinAttributeDTO.setXingyinId(xingyin.getId());ListAttributeVO attributes xingyinAttributeMapper.selectAttributes(xingyinAttributeDTO);for (AttributeVO attribute : attributes) {if (气血回复效果.equals(attribute.getPropertyName())) {hfqd.addAndGet(attribute.getPropertyValue());} else if (物理抵抗.equals(attribute.getPropertyName())) {wldk.addAndGet(attribute.getPropertyValue());} else if (法术抵抗.equals(attribute.getPropertyName())) {fsdk.addAndGet(attribute.getPropertyValue());} else if (封印命中.equals(attribute.getPropertyName())) {fymz.addAndGet(attribute.getPropertyValue());} else if (抵抗封印.equals(attribute.getPropertyName())) {dkfy.addAndGet(attribute.getPropertyValue());} else if (法术暴击伤害.equals(attribute.getPropertyName())) {fbsh.addAndGet(attribute.getPropertyValue());} else if (物理暴击伤害.equals(attribute.getPropertyName())) {wbsh.addAndGet(attribute.getPropertyValue());}}}}advancedProperty.setWlbj(wlbj.get() %);advancedProperty.setWlkb(wlkb.get() %);advancedProperty.setFsbj(fsbj.get() %);advancedProperty.setFskb(fskb.get() %);advancedProperty.setHswf(hswf.get() %);advancedProperty.setHsff(hsff.get() %);advancedProperty.setFymz(fymz.get());advancedProperty.setDkfy(dkfy.get());advancedProperty.setWbsh(wbsh.get());advancedProperty.setFbsh(fbsh.get());advancedProperty.setWldk(wldk.get());advancedProperty.setFsdk(fsdk.get());advancedProperty.setHfqd(hfqd.get());// 保存到redis中String key RedisKeyPrefixConst.PREFIX_ADVANCED_PROPERTY roleId;stringRedisUtils.set(key, JSON.toJSONString(advancedProperty));}}
而AdvancedProperty是一个数据库entity类
package cn.edu.sgu.www.mhxysy.entity.role;import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;import java.io.Serializable;/*** 角色高级属性表* author heyunlin* version 1.0*/
Data
TableName(advanced_property)
public class AdvancedProperty implements Serializable {private static final long serialVersionUID 18L;/*** 角色ID*/private String roleId;/*** 物理暴击*/private String wlbj;/*** 物理抗暴*/private String wlkb;/*** 法术暴击*/private String fsbj;/*** 法术抗暴*/private String fskb;/*** 忽视物防*/private String hswf;/*** 忽视法防*/private String hsff;/*** 封印命中*/private Integer fymz;/*** 抵抗封印*/private Integer dkfy;// 星印附加属性/*** 物暴伤害*/private Integer wbsh;/*** 法暴伤害*/private Integer fbsh;/*** 物理抵抗*/private Integer wldk;/*** 法术抵抗*/private Integer fsdk;/*** 回复强度*/private Integer hfqd;
}
然后在查询数据的时候发生了类型转换异常。 最后通过debug发现其实通过下面代码解析得到的对象的结构和AdvancedProperty是一样的
Object object JSON.parse(data); 既然如此不能转换类型那就不转了呗其实返回值的类型并不影响前端页面的数据渲染所以把接口返回类型改为Object问题完美解决~
package cn.edu.sgu.www.mhxysy.service.role.impl;import cn.edu.sgu.www.mhxysy.consts.RedisKeyPrefixConst;
import cn.edu.sgu.www.mhxysy.observe.observer.Observer;
import cn.edu.sgu.www.mhxysy.observe.subject.Subject;
import cn.edu.sgu.www.mhxysy.redis.StringRedisUtils;
import cn.edu.sgu.www.mhxysy.service.role.AdvancedPropertyService;
import com.alibaba.fastjson.JSON;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;/*** author heyunlin* version 1.0*/
Service
public class AdvancedPropertyServiceImpl implements AdvancedPropertyService {private final StringRedisUtils stringRedisUtils;private final Subject advancedPropertySubject;private final Observer advancedPropertyObserver;Autowiredpublic AdvancedPropertyServiceImpl(StringRedisUtils stringRedisUtils,Subject advancedPropertySubject,Observer advancedPropertyObserver) {this.stringRedisUtils stringRedisUtils;this.advancedPropertySubject advancedPropertySubject;this.advancedPropertyObserver advancedPropertyObserver;}Overridepublic Object selectByRoleId(String roleId) {String key RedisKeyPrefixConst.PREFIX_ADVANCED_PROPERTY roleId;// 没有命中缓存if (!stringRedisUtils.hasKey(key)) {advancedPropertySubject.addObserver(advancedPropertyObserver);advancedPropertySubject.notice(roleId);}String data stringRedisUtils.get(key);return JSON.parse(data);}}
