我正在编写一个程序，它将数据写入excel表格的表格格式。我的代码按我的要求提供了所有细节。
但是为了获得表格格式，我必须在excel表格中按照以下步骤
（选择一列 - ＆gt;数据 - ＆gt;文字到列 - ＆gt;选择选项＆＃39;分隔＆＃39; - ＆gt;点击按钮＆＃39; next＆＃39; - ＆gt;选择选项＆＃39;逗号＆＃39; - >点击按钮＆＃39;下一步＆＃39; - >点击按钮＆＃39;完成＆＃39;）。
我希望我的代码能够自动生成我想要的格式，而不需要在excel表格中执行上述步骤。任何人都可以帮助我吗？提前致谢。下面显示的是我的代码。
public class GenrateCSV {
private static JFileChooser fileChooser;
private ComparisonController comparisonController;
private int referenceId;
private void generateXlsFile(String sFileName, ComparisonController comparisonController) {
try {
this.referenceId = comparisonController.getReferenceId();
FileWriter writer = new FileWriter(sFileName);
//Main headings
writer.append(",");
writer.append(",");
writer.append(",");
writer.append('\n');
writer.append('\n');
writer.append(",");
writer.append(",");
writer.append("Case name");
writer.append(",");
writer.append(",");
writer.append(',');
writer.append("Folder 01");
writer.append(",");
writer.append(',');
writer.append(',');
writer.append(',');
writer.append(',');
writer.append("Folder 02");
writer.append(",");
writer.append(',');
writer.append(',');
writer.append(',');
writer.append(",");
writer.append("Compared results");
writer.append('\n');
//folder 01- sub headings
writer.append(",");
writer.append(",");
writer.append(",");
writer.append(",");
writer.append("Min. Jacobian");
writer.append(",");
writer.append("Average Jacobian");
writer.append(",");
writer.append("Max. Jacobian");
writer.append(',');
writer.append("Range");
writer.append(",");
writer.append(',');
//folder 02 - sub headings
writer.append("Min. Jacobian");
writer.append(",");
writer.append("Average Jacobian");
writer.append(",");
writer.append("Max. Jacobian");
writer.append(',');
writer.append("Range");
writer.append(",");
writer.append(',');
//comapred results - sub headings
writer.append("Percentage change of min. values");
writer.append(",");
writer.append("Percentage change of Average");
writer.append(",");
writer.append("Percentage change of min. values");
writer.append(",");
writer.append("Percentage change of Ranges");
writer.append('\n');
//empty line as for the 2nd line in all the columns
writer.append('\n');
//Data for folder 1. Case: turb_rad_A70 1
//case name
writer.append(",");
writer.append(",");
String string = comparisonController.getQalFile1().getFileDetails().getParent();;
string = string.replace("\\", ",");
String[] splittedStr = string.split(",");
writer.append(splittedStr[splittedStr.length - 1]);
//Min. Jacobian
writer.append(",");
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(comparisonController.getQalFile1().getMinimumElement().getJacobianRatio()));
}
//Avg.Jacobian
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(comparisonController.getQalFile1().getAvgElement().getJacobianRatio()));
}
//Max. Jacobian
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(comparisonController.getQalFile1().getMaximumElement().getJacobianRatio()));
}
//Range
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(comparisonController.getQalFile1().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile1().getMinimumElement().getJacobianRatio()));
}
//Data for folder 2. Case: turb_rad_A70 1
//Min. Jacobian
writer.append(",");
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(comparisonController.getQalFile2().getMinimumElement().getJacobianRatio()));
}
//Avg.Jacobian
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(comparisonController.getQalFile2().getAvgElement().getJacobianRatio()));
}
//Max. Jacobian
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(comparisonController.getQalFile2().getMaximumElement().getJacobianRatio()));
}
//Range
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(comparisonController.getQalFile2().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile2().getMinimumElement().getJacobianRatio()));
}
//Data for compared reults. Case: turb_rad_A70 1
//Percentage change of min.values ((Folder 01 - Folder 02)/|Folder 01|*100)
writer.append(",");
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(((comparisonController.getQalFile1().getMinimumElement().getJacobianRatio() - comparisonController.getQalFile2().getMinimumElement().getJacobianRatio()) / comparisonController.getQalFile1().getMinimumElement().getJacobianRatio()) * 100));
}
//Percentage change of Average. ((Folder 01 - Folder 02)/|Folder 01|*100)
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(((comparisonController.getQalFile1().getAvgElement().getJacobianRatio() - comparisonController.getQalFile2().getAvgElement().getJacobianRatio()) / comparisonController.getQalFile1().getAvgElement().getJacobianRatio()) * 100));
}
//Percentage change of max.values ((Folder 01 - Folder 02)/|Folder 01|*100)
writer.append(",");
if (referenceId == 0) {
writer.append(String.valueOf(((comparisonController.getQalFile1().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile2().getMaximumElement().getJacobianRatio()) / comparisonController.getQalFile1().getMaximumElement().getJacobianRatio()) * 100));
}
//Percentage change of Range. ((Folder 01 - Folder 02)/|Folder 01|*100)
writer.append(",");
if (referenceId == 0) {
double file1range = comparisonController.getQalFile1().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile1().getMinimumElement().getJacobianRatio();
double file2range = comparisonController.getQalFile2().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile2().getMinimumElement().getJacobianRatio();
writer.append(String.valueOf(((file1range - file2range) / file1range) * 100));
// writer.append(String.valueOf(((comparisonController.getQalFile1().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile1().getMinimumElement().getJacobianRatio()) - ((comparisonController.getQalFile2().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile2().getMinimumElement().getJacobianRatio()) - (comparisonController.getQalFile1().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile1().getMinimumElement().getJacobianRatio()))) / (comparisonController.getQalFile1().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile1().getMinimumElement().getJacobianRatio()) * 100));
}
System.out.println(writer.toString());
System.out.println("1-max" + comparisonController.getQalFile1().getMaximumElement().getJacobianRatio());
System.out.println("1-min" + comparisonController.getQalFile1().getMinimumElement().getJacobianRatio());
System.out.println();
System.out.println("2-max" + comparisonController.getQalFile1().getMaximumElement().getJacobianRatio());
System.out.println("2-min" + comparisonController.getQalFile1().getMinimumElement().getJacobianRatio());
System.out.println();
System.out.println("1-range" + (comparisonController.getQalFile1().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile1().getMinimumElement().getJacobianRatio()));
System.out.println("2-range" + (comparisonController.getQalFile2().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile2().getMinimumElement().getJacobianRatio()));
System.out.println();
double file1range = comparisonController.getQalFile1().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile1().getMinimumElement().getJacobianRatio();
double file2range = comparisonController.getQalFile2().getMaximumElement().getJacobianRatio() - comparisonController.getQalFile2().getMinimumElement().getJacobianRatio();
System.out.println(((file1range - file2range) / file1range) * 100);
`
答案 0 :(得分：1)
见Apache POI - the Java API for Microsoft Documents。 Apache POI Project是Excel文件格式（xls和xlsx）的纯Java实现。您可以通过POI直接写入/读取本机Excel的文件。请参阅examples。
答案 1 :(得分：0)
Jasper Reports为您提供了一种编写Excel文件的简便方法