本文实例讲述了应用Java泛型和反射导出CSV文件的方法。分享给大家供大家参考。具体如下：

项目中有需求要把数据导出为CSV文件，因为不同的类有不同的属性，为了代码简单，应用Java的泛型和反射，写了一个函数，完成导出功能。

复制代码 代码如下:public <T> void saveFile(List<T> list, String outFile) throws IOException {

if (list == null || list.isEmpty()) {

return;

}

if (StringUtils.isEmpty(outFile)) {

throw new IllegalArgumentException("outfile is null");

}

boolean isFirst = true;

BufferedWriter out = null;

try {

out = new BufferedWriter(new FileWriter(outFile));

for (T t : list) {

StringBuilder sb1 = new StringBuilder();

StringBuilder sb2 = new StringBuilder();

Class clazz = (Class) t.getClass();

Field[] fs = clazz.getDeclaredFields();

for (int i = 0; i < fs.length; i++) {

Field f = fs[i];

f.setAccessible(true);

try {

if (isFirst) {

sb1.append(f.getName());

sb1.append(",");

}

Object val = f.get(t);

if (val == null) {

sb2.append("");

} else {

sb2.append(val.toString());

}

sb2.append(",");

} catch (IllegalArgumentException | IllegalAccessException e) {

e.printStackTrace();

}

}

if (isFirst) {

out.write(sb1.toString());

isFirst = false;

out.newLine();

}

out.write(sb2.toString());

out.newLine();

}

} catch (IOException e1) {

throw e1;

} finally {

try {

if (out != null) {

out.close();

}

} catch (IOException e2) {

throw e2;

}

}

}

希望本文所述对大家的Java程序设计有所帮助。