咨询下,如何java用poi,导出树状结构组织架构图,可以绘肘线,谢谢。
该回答引用GPTᴼᴾᴱᴺᴬᴵ
使用POI或JXL实现导出组织架构图可以分为以下步骤:
构造组织架构数据模型,以便能够在Excel中正确显示组织架构图。可以使用Java中的对象、集合等来表示组织结构的层次关系。
使用POI或JXL创建Excel文档,并设置相关的样式、格式等,以便在文档中正确显示组织架构图。
将组织架构数据模型渲染成Excel中的组织架构图形,并将其插入到Excel文档中。可以使用POI或JXL中提供的API来实现此操作。
以下是一个简单的示例代码,演示如何使用POI创建一个组织架构图:
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import java.io.FileOutputStream;
import java.io.IOException;
public class OrganizationChartExample {
public static void main(String[] args) throws IOException {
// 构造组织架构数据模型
OrganizationChartNode root = new OrganizationChartNode("CEO", null);
OrganizationChartNode department1 = new OrganizationChartNode("Department 1", root);
OrganizationChartNode department2 = new OrganizationChartNode("Department 2", root);
OrganizationChartNode team1 = new OrganizationChartNode("Team 1", department1);
OrganizationChartNode team2 = new OrganizationChartNode("Team 2", department1);
OrganizationChartNode team3 = new OrganizationChartNode("Team 3", department2);
// 创建Excel文档
Workbook workbook = new XSSFWorkbook();
Sheet sheet = workbook.createSheet("Organization Chart");
// 创建样式
CellStyle style = workbook.createCellStyle();
style.setBorderBottom(BorderStyle.THIN);
style.setBorderLeft(BorderStyle.THIN);
style.setBorderRight(BorderStyle.THIN);
style.setBorderTop(BorderStyle.THIN);
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.CENTER);
// 渲染组织架构图形
int rowIdx = 0;
rowIdx = renderNode(sheet, root, rowIdx, style);
// 保存文档
FileOutputStream outputStream = new FileOutputStream("org-chart.xlsx");
workbook.write(outputStream);
workbook.close();
outputStream.close();
}
private static int renderNode(Sheet sheet, OrganizationChartNode node, int rowIdx, CellStyle style) {
Row row = sheet.createRow(rowIdx++);
Cell cell = row.createCell(0);
cell.setCellValue(node.getName());
cell.setCellStyle(style);
if (!node.getChildren().isEmpty()) {
// 如果有子节点,则合并单元格并插入箭头
int startRow = rowIdx;
int endRow = startRow + node.getChildren().size() - 1;
CellRangeAddress range = new CellRangeAddress(startRow, endRow, 0, 0);
sheet.addMergedRegion(range);
// 插入箭头
Row arrowRow = sheet.createRow(startRow + node.getChildren().size() / 2);
Cell arrowCell = arrowRow.createCell(1);
arrowCell.setCellValue("→");
arrowCell.setCellStyle(style);
// 递归渲染子节点
for (OrganizationChartNode child :node.getChildren()) {
rowIdx = renderNode(sheet, child, rowIdx, style);
}
}
return rowIdx;
}
使用Java的POI库导出树状结构组织架构图,可以借助第三方库GraphStream来实现。以下是具体的步骤:
在Maven或Gradle中添加GraphStream的依赖:
Maven:
<dependency>
<groupId>org.graphstream</groupId>
<artifactId>gs-core</artifactId>
<version>1.3</version>
</dependency>
Gradle:
implementation 'org.graphstream:gs-core:1.3'
import org.graphstream.graph.Graph;
import org.graphstream.graph.implementations.SingleGraph;
Graph graph = new SingleGraph("Org Chart");
graph.addNode("CEO");
graph.addNode("Manager");
graph.addNode("Employee 1");
graph.addNode("Employee 2");
graph.addEdge("CEOMgr", "CEO", "Manager");
graph.addEdge("MgrEmp1", "Manager", "Employee 1");
graph.addEdge("MgrEmp2", "Manager", "Employee 2");
可以使用CSS样式表设置节点的样式:
graph.setAttribute("ui.stylesheet", "node { text-color: #333;size-mode:dyn-size;} edge{shape:cubic-curve;}");
可以使用布局算法对节点进行自动布局,如下所示:
import org.graphstream.algorithm.layout.*;
import org.graphstream.algorithm.layout.spring.SpringBox;
Layout layout = new SpringBox();
layout.setQuality(0);
layout.setForce(0.05);
layout.initAlgo();
layout.compute();
使用Java的POI库将生成的图形数据写入Excel文件,并使用肘线等功能进行美化。
以上是一个简单的使用GraphStream和POI库导出树状结构组织架构图的流程。但需要注意的是,这只是一个示例,具体实现还需要根据具体需求进行调整和优化。