List＜对象＞转JSON字符串以及JSON字符串转List＜对象＞

签名：但行好事，莫问前程。

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前言

记录一下List<对象>转JSON字符串以及JSON字符串转List<对象>

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一、工作需求

产品需求中有一个需求要求页面布局以JSON保存


版本实体类：

public class SoftwareVersion extends SuperEntity {private static final long serialVersionUID = 1L;@Schema(description = "版本名称")private String name;@Schema(description = "版本描述")private String description;@Schema(description = "板块数量")private Integer sectionNumber;@Schema(description = "栏目数量")private Integer columnNumber;@Schema(description = "是否授权全部工具：0-否；1-是")private Boolean toolAll;@Schema(description = "仅限以下工具，以逗号分割工具主键ID")private String toolOnly;@Schema(description = "是否授权全部布局：0-否；1-是")private Boolean layoutAll;@Schema(description = "授权布局【以JSON格式保存】")private String pageLayout;@Schema(description = "员工数量")private Integer employeesNumber;@Schema(description = "管理员数量")private Integer administratorNumber;
}

版本授权布局dto

@Data
@Schema(name = "VersionLayoutDto")
public class VersionLayoutDto {// 布局名称private String name;// 布局类型private Integer type;// 布局数量private Integer number;// 布局是否可用private Boolean able;}

代码实现：

public class Demo {public static void main(String[] args) {List<VersionLayoutDto> versionLayoutDtoList = new ArrayList<>(4);VersionLayoutDto versionLayoutDto1 = new VersionLayoutDto();versionLayoutDto1.setName("轮播");versionLayoutDto1.setType(1);versionLayoutDto1.setNumber(6);versionLayoutDto1.setAble(true);VersionLayoutDto versionLayoutDto2 = new VersionLayoutDto();versionLayoutDto2.setName("通栏");versionLayoutDto2.setType(2);versionLayoutDto2.setNumber(6);versionLayoutDto2.setAble(true);VersionLayoutDto versionLayoutDto3 = new VersionLayoutDto();versionLayoutDto3.setName("两栏");versionLayoutDto3.setType(3);versionLayoutDto3.setNumber(6);versionLayoutDto3.setAble(true);VersionLayoutDto versionLayoutDto4 = new VersionLayoutDto();versionLayoutDto4.setName("三栏");versionLayoutDto4.setType(4);versionLayoutDto4.setNumber(6);versionLayoutDto4.setAble(true);versionLayoutDtoList.add(versionLayoutDto1);versionLayoutDtoList.add(versionLayoutDto2);versionLayoutDtoList.add(versionLayoutDto3);versionLayoutDtoList.add(versionLayoutDto4);String jsonString = JSON.toJSONString(versionLayoutDtoList);System.out.println("List<VersionLayoutDto> versionLayoutDtoList: 转换成json字符串");System.out.println(jsonString);System.out.println();System.out.println("jsonString 转换成 List<VersionLayoutDto>");List<VersionLayoutDto> list = JSONArray.parseArray(jsonString, VersionLayoutDto.class);list.forEach(System.out::println);}
}

运行结果：

二、List<对象>转JSON字符串

String jsonString = JSON.toJSONString(versionLayoutDtoList);

三、JSON字符串转List<对象>

List<VersionLayoutDto> list = JSONArray.parseArray(jsonString, VersionLayoutDto.class);

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总结

博客主要记录了List<对象>转JSON字符串以及JSON字符串转List<对象>，有啥错误或不足地方请指正，如果对你有所帮助，请一键三连。