gopdf 导出 pdf

# gopdf 介绍 [gopdf](https://www.github.com/tiechui1994/gopdf) 是一个比较完善的**PDF**导出库, 它整合了第三方库, 更加方便用户开发和使用. 它有以下特点: - 支持 Unicode 字符 (包括中文, 日语, 朝鲜语, 等等.) - 文档内容的自动定位与分页, 减少用户的工作量. - 支持图片插入, 支持多种图片格式, `PNG`, `BMP`, `JPEG`, `WEBP`, `TIFF` - 支持文档压缩 - 复杂表格组件, 块文本等 - `markdown` 文本可以直接转换成 `pdf` - 手动实现了 `markdown` 解析库, 可以提供其他 `markdown` 开发 github链接是: https://github.com/tiechui1994/gopdf ### 案例展示 ```go const ( TABLE_IG = "IPAexG" TABLE_MD = "MPBOLD" TABLE_MY = "微软雅黑" ) func ManyTableReportWithData() { r := core.CreateReport() font1 := core.FontMap{ FontName: TABLE_IG, FileName: "example//ttf/ipaexg.ttf", } font2 := core.FontMap{ FontName: TABLE_MD, FileName: "example//ttf/mplus-1p-bold.ttf", } font3 := core.FontMap{ FontName: TABLE_MY, FileName: "example//ttf/microsoft.ttf", } r.SetFonts([]*core.FontMap{&font1, &font2, &font3}) r.SetPage("A4", "mm", "P") r.RegisterExecutor(core.Executor(ManyTableReportWithDataExecutor), core.Detail) r.Execute("many_table_data.pdf") r.SaveAtomicCellText("many_table_data.txt") } func ManyTableReportWithDataExecutor(report *core.Report) { unit := report.GetUnit() lineSpace := 0.01 * unit lineHeight := 2 * unit rows, cols := 800, 5 table := NewTable(cols, rows, 80*unit, lineHeight, report) table.SetMargin(core.Scope{0, 0, 0, 0}) for i := 0; i < rows; i += 5 { key := rand.Intn(3) //key := (i+1)%2 + 1 f1 := core.Font{Family: TABLE_MY, Size: 10} border := core.NewScope(0.5*unit, 0.5*unit, 0, 0) switch key { case 0: for row := 0; row < 5; row++ { for col := 0; col < cols; col++ { conent := fmt.Sprintf("%v-(%v,%v)", 0, i+row, col) cell := table.NewCell() txt := NewTextCell(table.GetColWidth(i+row, col), lineHeight, lineSpace, report) txt.SetFont(f1).SetBorder(border).SetContent(conent + GetRandStr(1)) cell.SetElement(txt) } } case 1: c00 := table.NewCellByRange(1, 5) c01 := table.NewCellByRange(2, 2) c03 := table.NewCellByRange(2, 3) c21 := table.NewCellByRange(2, 1) c31 := table.NewCellByRange(4, 1) c41 := table.NewCellByRange(4, 1) t00 := NewTextCell(table.GetColWidth(i+0, 0), lineHeight, lineSpace, report) t01 := NewTextCell(table.GetColWidth(i+0, 1), lineHeight, lineSpace, report) t03 := NewTextCell(table.GetColWidth(i+0, 3), lineHeight, lineSpace, report) t21 := NewTextCell(table.GetColWidth(i+2, 1), lineHeight, lineSpace, report) t31 := NewTextCell(table.GetColWidth(i+3, 1), lineHeight, lineSpace, report) t41 := NewTextCell(table.GetColWidth(i+4, 1), lineHeight, lineSpace, report) t00.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 1, i+0, 0) + GetRandStr(5)) t01.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 1, i+0, 1) + GetRandStr(4)) t03.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 1, i+0, 3) + GetRandStr(6)) t21.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 1, i+2, 1) + GetRandStr(2)) t31.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 1, i+3, 1) + GetRandStr(4)) t41.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 1, i+4, 1) + GetRandStr(4)) c00.SetElement(t00) c01.SetElement(t01) c03.SetElement(t03) c21.SetElement(t21) c31.SetElement(t31) c41.SetElement(t41) case 2: c00 := table.NewCellByRange(3, 2) c03 := table.NewCellByRange(2, 3) c20 := table.NewCellByRange(1, 2) c21 := table.NewCellByRange(2, 3) c33 := table.NewCellByRange(2, 2) c40 := table.NewCellByRange(1, 1) t00 := NewTextCell(table.GetColWidth(i+0, 0), lineHeight, lineSpace, report) t03 := NewTextCell(table.GetColWidth(i+0, 3), lineHeight, lineSpace, report) t20 := NewTextCell(table.GetColWidth(i+2, 0), lineHeight, lineSpace, report) t21 := NewTextCell(table.GetColWidth(i+2, 1), lineHeight, lineSpace, report) t33 := NewTextCell(table.GetColWidth(i+3, 3), lineHeight, lineSpace, report) t40 := NewTextCell(table.GetColWidth(i+4, 0), lineHeight, lineSpace, report) t00.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 2, i+0, 0) + GetRandStr(6)) t03.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 2, i+0, 3) + GetRandStr(6)) t20.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 2, i+2, 0) + GetRandStr(2)) t21.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 2, i+2, 1) + GetRandStr(6)) t33.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 2, i+3, 3) + GetRandStr(4)) t40.SetFont(f1).SetBorder(border).SetContent(fmt.Sprintf("%v-(%v,%v)", 2, i+4, 0) + GetRandStr(1)) c00.SetElement(t00) c03.SetElement(t03) c20.SetElement(t20) c21.SetElement(t21) c33.SetElement(t33) c40.SetElement(t40) } } table.GenerateAtomicCell() } func GetRandStr(l ...int) string { seed := rand.New(rand.NewSource(time.Now().UnixNano())) str := "0123456789ABCDEFGHIGKLMNOPQRSTUVWXYZ" l = append(l, 8) r := seed.Intn(l[0]*11) + 8 data := strings.Repeat(str, r/36+1) return data[:r] + "---" } func TestTable(t *testing.T) { ManyTableReportWithData() } ``` 上述的案例展示的是一个复杂不规则的案例, 效果图如下  ### 未来计划 1. 优化 `Markdown` 转 PDF 部分组件 2. 优化组件 更新详细使用, 请参考开源库 https://github.com/tiechui1994/gopdf, 欢迎大家贡献自己的力量.