使用工厂模式，根据不同的输入格式创建不同的对象，并对每个对象进行相应的操作。

示例代码：

interface Formatter { formatData(): string; }

class CsvFormatter implements Formatter { constructor(private data: any) {}

formatData(): string { let csv = ''; for (const row of this.data) { csv += Object.values(row).join(',') + '\n'; } return csv; } }

class JsonFormatter implements Formatter { constructor(private data: any) {}

formatData(): string { return JSON.stringify(this.data); } }

class XmlFormatter implements Formatter { constructor(private data: any) {}

formatData(): string { let xml = '\n'; for (const row of this.data) { xml += \n; for (const [key, value] of Object.entries(row)) { xml += <${key}>${value}\n; } xml += \n; } xml += '\n'; return xml; } }

class FormatterFactory { static createFormatter(format: string, data: any): Formatter { switch (format) { case 'csv': return new CsvFormatter(data); case 'json': return new JsonFormatter(data); case 'xml': return new XmlFormatter(data); default: throw new Error(Unsupported format: ${format}); } } }

const data = [ { name: 'Alice', age: 30, gender: 'female' }, { name: 'Bob', age: 40, gender: 'male' }, { name: 'Charlie', age: 50, gender: 'male' }, ];

const formatter = FormatterFactory.createFormatter('xml', data); const formattedData = formatter.formatData(); console.log(formattedData);