Here comes a new chapter in the series of data conversion when exporting with easyexcel!

Come on. ~ Use EasyExcel A new chapter in a series of data conversion when exporting ！

A synopsis of antecedents

Before using EasyExcel When performing data export function , Type conversion processing （ Payment type 、 men and women 、 Other types, etc ） It's all for if else Judgment processing , Recently used Map To process , Record it here .

Code implementation

//  Mode one 
public class DemoTypeConverter implements Converter<String> {

    public static final   Map<String,String> DEMO_TYPE_MAP = ImmutableMap.<String,String>builder()
            .put(" type 1","01")
            .put(" type 2","02")
            .put(" type 3","03")
            .put(" type 4","04")
            .put(" type 5","05")
            .put(" type 6","06")
            .put(" type 7","07").build();
    @Override
    public Class supportJavaTypeKey() {
        return String.class;
    }

    @Override
    public CellDataTypeEnum supportExcelTypeKey() {
        return CellDataTypeEnum.STRING;
    }

    @Override
    public String convertToJavaData(CellData cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
        if (StringUtils.isBlank(cellData.getStringValue())){
            return "";
        }
        return DEMO_TYPE_MAP.getOrDefault(cellData.getStringValue(),"");
    }

    @Override
    public CellData convertToExcelData(String value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
        return null;
    }
}

//  Mode two 

public class DemoTypeConverter implements Converter<String> {


    public static final Map<String,String> DEMO_TYPE_MAP = ImmutableMap.<String,String> of(
            " type 1","01",
            " type 2","02",
            " type 3","03",
            " type 4","04"
    );
    @Override
    public Class supportJavaTypeKey() {
        return String.class;
    }

    @Override
    public CellDataTypeEnum supportExcelTypeKey() {
        return CellDataTypeEnum.STRING;
    }

    @Override
    public String convertToJavaData(CellData cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
        if (StringUtils.isBlank(cellData.getStringValue())){
            return "";
        }
        return DEMO_TYPE_MAP.getOrDefault(cellData.getStringValue(),"");
    }

    @Override
    public CellData convertToExcelData(String value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
        return null;
    }
}

summary

As can be seen from the above code , The difference between the two methods is only Map Are constructed in different ways , Other code logic is the same . If there are many types, it is recommended to adopt method 1 , Less than or equal to 4 Method 2 .