mybatis-plus处理blob字段的完整示例代码

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>最新版本号</version>
</dependency>

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import java.sql.*;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
@Component
public class MyLongBlobTypeHandler extends BaseTypeHandler<String> {
    @Override
    public void setNonNullParameter(PreparedStatement preparedStatement, int i, String s, JdbcType jdbcType) throws SQLException {
        preparedStatement.setBytes(i, s.getBytes(StandardCharsets.UTF_8));
    }
    @Override
    public String getNullableResult(ResultSet resultSet, String s) throws SQLException {
        byte[] bytes = resultSet.getBytes(s);
        return new String(bytes, StandardCharsets.UTF_8);
    }
    @Override
    public String getNullableResult(ResultSet resultSet, int i) throws SQLException {
        byte[] bytes = resultSet.getBytes(i);
        return new String(bytes, StandardCharsets.UTF_8);
    }
    @Override
    public String getNullableResult(CallableStatement callableStatement, int i) throws SQLException {
        byte[] bytes = callableStatement.getBytes(i);
        return new String(bytes, StandardCharsets.UTF_8);
    }
}

@Data
@TableName("blog_article")
public class Article extends BaseEntity {
    private String name;
    private String url;
    private String tag;
    private Long channelId;
    private String channelName;
    @TableField(value = "content", typeHandler = MyLongBlobTypeHandler.class)
    private String content;
    private Integer orderNum;
    //是否启用，Y启用，N禁用
    private String enabled;
    //浏览数
    private Integer views;
    //description
    private String description;
    //keywords
    private String keywords;
}

@Service
public class ArticleService extends ServiceImpl<ArticleMapper, Article> {
    /**
     * 添加文章
     * @param article
     */
    public void add(@NotNull Article article){
        this.save(article);
    }
}