springboot 码表转换 typeHandler

数据库中很多码表，比如人员性别（男女），数据有效性（是否）……

在前后端分离的接口调试中， 码表都是通过1,2 ……数字进行传递， 不明了， 也不方便进行数据的比对核验。

springboot的typeHandler , 主要是让接口通过码表键值对中的值进行传输， 所有属性的含义一目了然。

1.配置文件添加mybatis扫描的typeHandler类

mybatis:
    # 搜索指定包别名
    typeAliasesPackage: com.guideir.workRecode.pojo
    # 配置mapper的扫描，找到所有的mapper.xml映射文件
    mapperLocations: classpath:mapper/**/*Mapper.xml
    typeHandlersPackage: com.workRecode.typeHandler
    configuration:
      mapUnderscoreToCamelCase: true

2.添加码表的枚举

　　

 

/**
 * TODO
 *
 * @author  hs
 * @date 2021/10/28 13:56
 */
public enum ProjectTypeEnum {
    开发中项目(1,"开发中项目" ),
    维护中项目(2,"维护中项目") ;

    private final Integer code;
    private final String description;

    private ProjectTypeEnum(Integer code, String description) {
        this.code = code;
        this.description = description;
    }

    public Integer getCode() { 
        return code;
    }

    public String getDescription() {
        return description;
    }

    public static ProjectTypeEnum getEnumByCode(Integer code){
        for(ProjectTypeEnum projectTypeEnum: ProjectTypeEnum.values()){
            if(projectTypeEnum.getCode() == code){
                return projectTypeEnum;
            }

        }
        return null ;
    }

}

3.　　pojo中的对象属性改变

 
import java.util.Date;

@Data
public class GdProject {
    private String id;

    private String projectName;

    private ProjectTypeEnum projectType;

    private String PIC;

    private String description;

    private String createUser;
    @DateTimeFormat (pattern="yyyy-MM-dd")
    @JsonFormat (timezone = "GMT+8",pattern = "yyyy-MM-dd")
    private Date createTime;

    private Integer isEnable;

    public GdProject(String id, String projectName, ProjectTypeEnum projectType, String PIC, String description, String createUser, Date createTime, Integer isEnable) {
        this.id = id;
        this.projectName = projectName;
        this.projectType = projectType;
        this.PIC = PIC;
        this.description = description;
        this.createUser = createUser;
        this.createTime = createTime;
        this.isEnable = isEnable;
    }

    public GdProject(String id, String projectName, Integer projectType, String PIC, String description, String createUser, Date createTime, Integer isEnable) {
        this.id = id;
        this.projectName = projectName;
        this.projectType = ProjectTypeEnum.getEnumByCode(projectType);
        this.PIC = PIC;
        this.description = description;
        this.createUser = createUser;
        this.createTime = createTime;
        this.isEnable = isEnable;
    }
    public GdProject() {
        super();
    }

}

　4. 

package com.workRecode.typeHandler;
 

/**
 * TODO
 *
 * @author hs
 * @date 2021/10/20 17:13
 */
@MappedJdbcTypes(JdbcType.INTEGER)
@MappedTypes(value = ProjectTypeEnum.class)
public class ProjectTypeHandler extends BaseTypeHandler<ProjectTypeEnum> {

    @Override
    public void setNonNullParameter(PreparedStatement preparedStatement, int i, ProjectTypeEnum projectTypeEnum, JdbcType jdbcType) throws SQLException {
        preparedStatement.setInt(i,projectTypeEnum.getCode());
    }

    @Override
    public ProjectTypeEnum getNullableResult(ResultSet resultSet, String s) throws SQLException {
        Integer code = resultSet.getInt(s);
        return ProjectTypeEnum.getEnumByCode(code);
    }

    @Override
    public ProjectTypeEnum getNullableResult(ResultSet resultSet, int i) throws SQLException {
        Integer code = resultSet.getInt(i);
        return ProjectTypeEnum.getEnumByCode(code);
    }

    @Override
    public ProjectTypeEnum getNullableResult(CallableStatement callableStatement, int i) throws SQLException {
        Integer code = callableStatement.getInt(i);
        return ProjectTypeEnum.getEnumByCode(code);
    }
}

　　

通过上面几部操作后测试

 请求路径中传入是中午释义 ， 数据库中保存的为int型