Spread表格组件 For JAVA：表格相关操作

之前的技术博客中我们说到Spread 表格组件的Java CTP版本已经发布：《表格组件JAVACTP版本抢先预览》。

本篇我们来看一下他的主要功能，例如下图所示的Excel我们应当如何实现：

1、 初始化workbook

（初始化workbook会默认初始化一个worksheet），获取worksheet对象，之后更改sheet标签名称为Tables

Workbook workbook = new Workbook();
IWorksheet worksheet = workbook.getWorksheets().get(0);
worksheet.setName("Table");

2、 插入数据：

Spread表格组件中支持插入二位数组形式的插入方式，例如下面所示：

   Object[][] sourceData = new Object[][]{
            {"ITEM", "AMOUNT"},
            {"Income 1", 2500},
            {"Income 2", 1000},
            {"Income 3", 250},
            {"Other", 250},
        };
        Object[][] sourceData1 = new Object[][]{
            {"ITEM", "AMOUNT"},
            {"Rent/mortgage", 800},
            {"Electricity", 120},
            {"Gas", 50},
            {"Cell phone", 45},
            {"Groceries", 500},
            {"Car payment", 273},
            {"Auto expenses", 120},
            {"Student loans", 50},
            {"Credit cards", 100},
            {"Auto Insurance", 78},
            {"Personal care", 50},
            {"Entertainment", 100},
            {"Miscellaneous", 50},
        };
        worksheet.getRange("B3:C7").setValue(sourceData);
        worksheet.getRange("B10:C23").setValue(sourceData1);

3、 设置单元格合并：

worksheet.getRange("B3:C7").setValue(sourceData);
worksheet.getRange("B10:C23").setValue(sourceData1);
worksheet.getRange("B2:C2").merge();
worksheet.getRange("B2").setValue("MONTHLY INCOME");
worksheet.getRange("B9:C9").merge();
worksheet.getRange("B9").setValue("MONTHLY EXPENSES");
worksheet.getRange("E2:G2").merge();
worksheet.getRange("E2").setValue("PERCENTAGE OF INCOME SPENT");
worksheet.getRange("E5:G5").merge();
worksheet.getRange("E5").setValue("SUMMARY");
worksheet.getRange("E3:F3").merge();
worksheet.getRange("E9").setValue("BALANCE");
worksheet.getRange("E6").setValue("Total Monthly Income");
worksheet.getRange("E7").setValue("Total Monthly Expenses");

4、 创建表格，设置表名，设置表样式

//Create the first table to show Income.
ITable incomeTable = worksheet.getTables().add(worksheet.getRange("B3:C7"), true);
    incomeTable.setName("tblIncome");
incomeTable.setTableStyle(workbook.getTableStyles().get("TableStyleMedium4"));
//Create the second table to show Expenses.
ITable expensesTable = worksheet.getTables().add(worksheet.getRange("B10:C23"), true);
    expensesTable.setName("tblExpenses");
expensesTable.setTableStyle(workbook.getTableStyles().get("TableStyleMedium4"));incomeTable.setTableStyle(workbook.getTableStyles().get("TableStyleMedium4"));

5、 设置表格公式

因为合计公式需要重复使用，可以定义名称将其以别名命名

worksheet.getNames().add("TotalMonthlyIncome", "=SUM(tblIncome[AMOUNT])");
worksheet.getNames().add("TotalMonthlyExpenses", "=SUM(tblExpenses[AMOUNT])");
之后我们就可以通过别名来快捷调用这些公式了
worksheet.getRange("E3").setFormula("=TotalMonthlyExpenses");
worksheet.getRange("G3").setFormula("=TotalMonthlyExpenses/TotalMonthlyIncome");
worksheet.getRange("G6").setFormula("=TotalMonthlyIncome");
worksheet.getRange("G7").setFormula("=TotalMonthlyExpenses");
worksheet.getRange("G9").setFormula("=TotalMonthlyIncome-TotalMonthlyExpenses");

6、 最后以文件流形式导出生成Excel文件

File f= new File("d:" + File.separator + "outputExcel.xlsx");
        OutputStream out = null;
        out = new FileOutputStream(f);
        workbook.save(out);
out.close();

大功告成，让我们打开导出的Excel看一下效果：

效果图