MyExcel 3.0.0.RC Published: Reconstruction & performance

MyExcel, is a set of import, export, encryption, Excel and many other features of Java toolkit.

Import : Provides simple API, read the contents of Excel, and converted to List <Bean>.
Export : fast mass data derived a simple list, may be generated high complexity Excel layouts, layout refers complex comprising a plurality of irregular merged cells, background color, font size, italics, drop-down lists, etc., can be automatically divides Excel generating a zip archive.

With nearly two months to reconstruct, MyExcel 3.0.0.RC version released today use this point to modify the following overview:

Repair DefaultExcelBuilder, DefaultStreamExcelBuilder custom style invalidity;
Fix problems with reading decimal integer error;
Repair DefaultStreamExcelBuilder massive data export multi-page sheet, can not fix all the problems header row;
Repair DefaultStreamExcelBuilder writing reset workbook type error;
Based DefaultStreamExcelBuilder rewrite DefaultExcelBuilder, in the case of guarantee simple and convenient API, to solve the root causes of performance problems;
New DefaultExcelBuilder, DefaultStreamExcelBuilder support export images;
New DefaultExcelBuilder, DefaultStreamExcelBuilder support global style settings, interlaced style settings;
New DefaultExcelBuilder, DefaultStreamExcelBuilder, template ExcelBuilder support custom row heights;
New DefaultStreamExcelBuilder new cancel, clear interfaces, enhanced resource initiative to clean up capacity;
Add the ExcelBuilder unit test project to enhance the stability;
When you add an exception to read, the contents of the relevant row and tips to speed up the issue positioning speed;
Delete rowAccessWindowSize option, the default best practices, but also to avoid user errors are not familiar with the use of lead, not backward compatible;
Modify autoWidthStrategy method widthStrategy method, strengthen the interface semantics;
The original DefaultStreamExcelBuilder start (int waitQueueSize, Class [] groups) option parameter to the method, waitQueueSize (), groups ();
Support with the same file name when writing and writing;
Reconstruction SaxExcelReader, enhance code readability;
CsvBuilder append new feature allows the generated file additional data;
DefaultStreamExcelBuilder time processing class cache increases, deriving further improve performance;

Note that, due to the large area of reconstruction, resulting in a part of the API is not compatible 3.0.0.RC the following versions:

Delete rowAccessWindowSize options;
The original DefaultStreamExcelBuilder start (int waitQueueSize, Class [] groups) option parameter to the method, waitQueueSize (), groups ();

// 新设定分组、等待队列容量方式
DefaultStreamExcelBuilder excelBuilder = DefaultStreamExcelBuilder.of(CommonPeople.class)
                .start(100,CommonPeople.class);

// 新设定分组、等待队列容量方式
DefaultStreamExcelBuilder excelBuilder = DefaultStreamExcelBuilder.of(CommonPeople.class)
                .groups(CommonPeople.class)
                .waitQueueSize(100)
                .start();

DETAILED update points as follows:

1. Add additional data csv way

CsvBuilder<CsvPeople> csvBuilder = CsvBuilder.of(People.class);
for (int i = 0; i < 10; i++) {
    csvBuilder.append(data(1000));
}
Csv csv = csvBuilder.build();

AttachmentExportUtil.export(csv.getFilePath(), "test.csv", response);

// 该种方式会覆盖原append.csv文件
csv.write(Paths.get("/User/append.csv"));

// 该种方式会在原append.csv文件继续追加数据，而不是覆盖
csv.write(Paths.get("/User/append.csv"),true);

2. Customize the height (Bean form)

@Data
@FieldDefaults(level = AccessLevel.PRIVATE)
@ExcelTable(sheetName = "人员信息", rowHeight = 50)
public class CommonPeople {

    @ExcelColumn(title = "姓名", index = 0)
    String name;

    @ExcelColumn(title = "年龄", index = 1)
    Integer age;

    @ExcelColumn(title = "是否会跳舞", groups = CommonPeople.class, index = 2)
    boolean dance;

    @ExcelColumn(title = "金钱", decimalFormat = "#,000.00", index = 3)
    BigDecimal money;
}

RowHeight can be set.

3. Customize the height (template mode)

<% DIRECTIVE SAFE_OUTPUT_OPEN; %>
<table>
    <caption>${sheetName}</caption>
    <thead>
        <tr style="background-color: #6495ED">
            <th colspan="3" style="text-align: center;vertical-align: middle;font-weight: bold;font-size: 14px;">产品介绍</th>
        </tr>
        <tr>
            <% for(title in titles){ %>
            <th>${title}</th>
            <% } %>
        </tr>
    </thead>
<% if(data!=null){ %>
    <tbody>
    <% for(item in data){ %>
    <tr style="height: 100px;">
        <td>${item.category}</td>
        <td>${item.name}</td>
        <td>${item.count}</td>
    </tr>
    <% } %>
</tbody>
<% } %>
</table>
<%
//关闭安全输出。
DIRECTIVE SAFE_OUTPUT_CLOSE;
%>

Set height Style style = "height: 100px;" can be.

4. interlace pattern set

@ExcelColumn(order = 0, title = "姓名",style = {"title->color:red;","even->color:yellow;","odd->background-color:green;width:50"})
private String name;

odd, even rows corresponding to the parity pattern.

The rest, please move the document: https://github.com/liaochong/myexcel/wiki

Welcome everyone to use, any questions can be raised through github issue, will try to respond promptly! ! !

MyExcel 3.0.0.RC Published: Reconstruction & performance

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