无需任何的外部文件,无需引入任何包
只需要设置响应头就可以了
1返回json格式数据
response.setHeader("content-type", "application/json;charset=UTF-8");
2返回xml格式
response.setHeader("content-type", "application/xml;charset=UTF-8");
除此以外还有
3返回excel表单
response.setHeader("Content-disposition","attachment; filename=Excelbook.xls");