针对简单导出进行简化

export/cell.go

@@ -40,6 +40,7 @@ func (e *Exporter) SetCell(sheet string, cell Cell) {
 		BottomY: bottomy,
 		IsMerge: start_col != end_col,
 	}
+	// 记录当前单元格位置
 	e.preLocation = &CellLocation
 	if cell.Style != nil {
 		style, _ := e.xlsx.NewStyle(cell.Style)

export/title.go

@@ -23,8 +23,7 @@ func (e *Exporter) SetGlobalTitleStyle(style *excelize.Style) {
 	e.GlobalTitleStyle = style
 }
 
-func (e *Exporter) SetTitle(sheet string) {
+func (e *Exporter) WriteTitle(sheet string, title Title) {
-	for _, title := range e.Titles {
 	start_col, end_col := e.CaculateCell(title.Location, title.Rowspan, title.Colspan)
 	e.xlsx.MergeCell(sheet, start_col, end_col)
 	e.xlsx.SetCellValue(sheet, start_col, title.Name)
@@ -39,4 +38,9 @@ func (e *Exporter) SetTitle(sheet string) {
 
 	}
 }
+
+func (e *Exporter) SetTitle(sheet string) {
+	for _, title := range e.Titles {
+		e.WriteTitle(sheet, title)
+	}
 }

export/xlsx.go

@@ -54,11 +54,10 @@ func (e *Exporter) Export(sheetIndex int) error {
 	if err != nil {
 		return err
 	}
-	if len(e.Titles) == 0 {
-		return fmt.Errorf("excel title is null")
-	}
 	sheet := e.Sheets[sheetIndex]
+	if len(e.Titles) > 0 {
 		e.SetTitle(sheet)
+	}
 	v := reflect.ValueOf(e.Data)
 	if v.Kind() != reflect.Pointer {
 		return fmt.Errorf("data must be pointer")
@@ -117,8 +116,19 @@ func (e *Exporter) writeCell(sheet string, field reflect.Value, tag string) {
 	colSpan, _ := strconv.Atoi(tagMap["colspan"])
 	rowSpan, _ := strconv.Atoi(tagMap["rowspan"])
 	loop := tagMap["loop"]
+	title := tagMap["title"]
+	if title != "" {
+		t := Title{
+			Name:     title,
+			Location: Location{X: x, Y: 1},
+			Colspan:  colSpan,
+			Rowspan:  rowSpan,
+		}
+		e.WriteTitle(sheet, t)
+	}
 	var location Location
 	if e.preLocation != nil {
+		// loop不为空，则表示该结构体需要循环输出，x坐标需要重新计算(即x坐标需要在上一个结构体的右边,主要用于导出字段数量不确定，用sliece类型的结构体存储)
 		if loop != "" {
 			y = e.preLocation.BottomY
 			if x <= e.preLocation.RightX {
@@ -127,7 +137,7 @@ func (e *Exporter) writeCell(sheet string, field reflect.Value, tag string) {
 		} else {
 			if x > e.preLocation.RightX {
 				y = e.preLocation.TopY
-			} else if x <= e.preLocation.RightX {
+			} else if x <= e.preLocation.RightX { // 如果x坐标小于等于上一个单元格的x坐标，则表示需要换行，此时y坐标需要在上一个单元格的下面
 				y = e.preLocation.BottomY + 1
 			}
 		}
@@ -153,10 +163,8 @@ func value(field reflect.Value) (val string) {
 	}
 	if mthV.IsValid() && mthV.Kind() == reflect.Func && mthV.Type().NumIn() == 0 {
 		callV := mthV.Call(nil)
-
 		if len(callV) > 0 {
 			val = fmt.Sprintf("%s", callV[0].String())
-
 			return
 		}
 	}

export1_test.go

@@ -147,7 +147,7 @@ func TestMain(t *testing.T) {
 	exporter := export.DefaultExporter()
 	exporter.Data = &data
 	exporter.Titles = title
-	exporter.File = "test.xlsx"
+	exporter.File = "test1.xlsx"
 	exporter.Path = "./"
 	exporter.Export(0)
 }

export6_test.go

@@ -0,0 +1,44 @@
+package xlsx
+
+import (
+	"fmt"
+	"testing"
+
+	"git.botann.com/lijun/xlsx/export"
+)
+
+type Data struct {
+	Name        string `export:"true,x:1,y:1,title:项目名称"`
+	TotalInvest int64  `export:"true,x:2,y:1,title:总投资(万元)"`
+	Unit        string `export:"true,x:3,y:1,title:单位"`
+	Remark      string `export:"true,x:4,y:1,title:备注"`
+}
+
+func TestMain(t *testing.T) {
+	data := []Data{
+		{
+			Name:        "项目1",
+			TotalInvest: 100,
+			Unit:        "单位1",
+			Remark:      "备注1",
+		},
+		{
+			Name:        "项目2",
+			TotalInvest: 200,
+			Unit:        "单位2",
+			Remark:      "备注2",
+		},
+		{
+			Name:        "项目3",
+			TotalInvest: 300,
+			Unit:        "单位3",
+			Remark:      "备注3",
+		},
+	}
+	exporter := export.DefaultExporter()
+	exporter.Data = &data
+	exporter.File = "test6.xlsx"
+	exporter.Path = "./"
+	err := exporter.Export(0)
+	fmt.Println(err)
+}