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在 handle 包下新建Jsonb处理类

方式一

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.baomidou.mybatisplus.extension.handlers.AbstractJsonTypeHandler;
import org.apache.commons.lang3.StringUtils;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedJdbcTypes;
import org.apache.ibatis.type.MappedTypes;
import org.postgresql.util.PGobject;import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;/*** @author CSDN @一碗情深* @description PostgreSql jsonb 数据处理器**/
@MappedTypes({Object.class})
@MappedJdbcTypes({JdbcType.VARCHAR})
public class JsonbTypeHandler extends AbstractJsonTypeHandler<Object> {private static final PGobject jsonObject = new PGobject();private final Class<?> type;public JsonbTypeHandler(Class<?> type) {this.type = type;}/*** 重写设置参数* @param ps* @param i* @param parameter* @param jdbcType* @throws SQLException*/@Overridepublic void setNonNullParameter(PreparedStatement ps, int i, Object parameter, JdbcType jdbcType) throws SQLException {if (ps != null) {jsonObject.setType("jsonb");jsonObject.setValue(JSON.toJSONString(parameter));ps.setObject(i, jsonObject);}}/*** 根据列名，获取可以为空的结果* @param rs* @param columnName* @return* @throws SQLException*/@Overridepublic Object getNullableResult(ResultSet rs, String columnName) throws SQLException {Object v = rs.getObject(columnName);return toFill(v);}/*** 根据列索引，获取可以为空的结果* @param rs* @param columnIndex* @return* @throws SQLException*/@Overridepublic Object getNullableResult(ResultSet rs, int columnIndex) throws SQLException {Object v = rs.getObject(columnIndex);return toFill(v);}@Overridepublic Object getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {Object v = cs.getObject(columnIndex);return toFill(v);}@Overrideprotected Object parse(String json) {return JSON.parseObject(json, this.type);}/*** 必须将 v 转成 PGObject 处理* @param v* @return*/private Object toFill(Object v) {if (v != null && v instanceof PGobject) {PGobject p = (PGobject) v;String pv = p.getValue();if (StringUtils.isNotEmpty(pv) && ("jsonb".equals(p.getType()) || "json".equals(p.getType()))) {return parse(p.getValue());}}return v;}@Overrideprotected String toJson(Object obj) {return JSON.toJSONString(obj, SerializerFeature.WriteMapNullValue, SerializerFeature.WriteNullListAsEmpty, SerializerFeature.WriteNullStringAsEmpty);}
}

方式二

package com.hlta.map.utils;import com.alibaba.fastjson.JSON;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedTypes;
import org.postgresql.util.PGobject;import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;/*** @author CSDN @一碗情深* @description PostgreSql jsonb 数据处理器**/
@MappedTypes({Object.class})
public class JsonbTypeHandler extends BaseTypeHandler<Object> {private static final PGobject jsonObject = new PGobject();@Overridepublic void setNonNullParameter(PreparedStatement preparedStatement, int i, Object o, JdbcType jdbcType) throws SQLException {if (preparedStatement != null) {jsonObject.setType("jsonb");jsonObject.setValue(JSON.toJSONString(o));preparedStatement.setObject(i, jsonObject);}}@Overridepublic Object getNullableResult(ResultSet resultSet, String s) throws SQLException {return JSON.parse(resultSet.getString(s));}@Overridepublic Object getNullableResult(ResultSet resultSet, int i) throws SQLException {return JSON.parse(resultSet.getString(i));}@Overridepublic Object getNullableResult(CallableStatement callableStatement, int i) throws SQLException {return JSON.parse(callableStatement.getString(i));}
}

PostgreSQL jsonb类型示例

新建数据库表含有jsonb类型

创建实体类

• 在实体类上加上 @TableName(value = "表名", autoResultMap = true)
• 在jsonb属性上加上 @TableField(value = "字段", typeHandler = JsonbTypeHandler.class)

import com.baomidou.mybatisplus.annotation.*;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.szydtx.handle.JsonbTypeHandler;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;import java.io.Serializable;
import java.util.Date;/*** @author CSDN @一碗情深*/
@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@TableName(value = "app_control_manage", autoResultMap = true)
public class AppControlManage implements Serializable {private static final long serialVersionUID = 1L;@TableId(value = "id", type = IdType.AUTO)private Integer id;/*** 名称*/@TableField("name")private String name;/*** 关联渠道*/@TableField("channel")private String channel;/*** 控制项*/@TableField(value = "content", typeHandler = JsonbTypeHandler.class)private Object content;/*** 说明*/@TableField("description")private String description;/*** 创建日期*/@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")@TableField(fill = FieldFill.INSERT)private Date createTime;
}

创建Control

以下方法用于接收post请求，将数据保存到数据库

@PostMapping("/test")
public Object uploadFile(@RequestBody JSONObject object, final HttpServletResponse response, final HttpServletRequest request) {AppControlManage appControlManage = object.toJavaObject(AppControlManage.class);boolean save = appControlManageService.save(appControlManage);if (save) {System.out.println("保存成功");} else {System.out.println("保存失败");}return appControlManage;
}

发起请求

可以看到，json数据被保存进数据库