摘要：mybatis-plus讀取JSON類型。
本文總共三個步驟：
1、在數據庫表定義JSON字段；
2、在實體類加上@TableName(autoResultMap = true)、在JSON字段映射的屬性加上@TableField(typeHandler = FastjsonTypeHandler.class)；
3、建一些業務代碼進行測試；
在數據庫表定義JSON字段
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CREATE TABLE `extra_info` ( `id` int(10) NOT NULL AUTO_INCREMENT PRIMARY KEY, `extra_object` json NULL, `extra_list` json NULL, `extra_array` json NULL);INSERT INTO `extra_info` VALUES (1, '{\"id\": 1, \"name\": \"2\"}', '[{\"id\": 1, \"name\": \"2\"}]', '[{\"id\": 1, \"name\": \"2\"}]'); |
在實體類加上@TableName(autoResultMap = true)、在JSON字段映射的屬性加上@TableField(typeHandler = FastjsonTypeHandler.class)
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import com.baomidou.mybatisplus.annotation.IdType;import com.baomidou.mybatisplus.annotation.TableField;import com.baomidou.mybatisplus.annotation.TableId;import com.baomidou.mybatisplus.annotation.TableName;import com.baomidou.mybatisplus.extension.handlers.FastjsonTypeHandler;import java.io.Serializable;import java.util.List;@TableName(autoResultMap = true)public class ExtraInfo implements Serializable { @TableId(type = IdType.AUTO) private Integer id; @TableField(typeHandler = FastjsonTypeHandler.class) private ExtraNode extraObject; @TableField(typeHandler = FastjsonTypeHandler.class) private List<ExtraNode> extraList; @TableField(typeHandler = FastjsonTypeHandler.class) private ExtraNode[] extraArray; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public ExtraNode getExtraObject() { return extraObject; } public void setExtraObject(ExtraNode extraObject) { this.extraObject = extraObject; } public List<ExtraNode> getExtraList() { return extraList; } public void setExtraList(List<ExtraNode> extraList) { this.extraList = extraList; } public ExtraNode[] getExtraArray() { return extraArray; } public void setExtraArray(ExtraNode[] extraArray) { this.extraArray = extraArray; }} |
建一些業務代碼進行測試
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import java.io.Serializable;public class ExtraNode implements Serializable { private Integer id; private String name; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }} |
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import com.baomidou.mybatisplus.core.mapper.BaseMapper;import org.springframework.stereotype.Repository;@Repositorypublic interface ExtraInfoMapper extends BaseMapper<ExtraInfo> {}import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import java.util.List;@RestController@RequestMapping("/test")public class TestController { @Autowired private ExtraInfoMapper extraInfoMapper; @GetMapping public List<ExtraInfo> listAll() { return this.extraInfoMapper.selectList(new LambdaQueryWrapper<>()); }} |
運行結果：
[
{
"id": 1,
"extraObject": { "id": 1, "name": "2" },
"extraList": [
{ "name": "2", "id": 1 }
],
"extraArray": [
{ "id": 1, "name": "2" }
]
}
]
到此這篇關于mybatis-plus讀取JSON類型的方法實現的文章就介紹到這了,更多相關mybatis-plus讀取JSON內容請搜索服務器之家以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持服務器之家！
原文鏈接：https://www.cnblogs.com/liangweiping/p/12835377.html
