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package cn.iocoder.dashboard.util.servlet ;
import cn.hutool.core.io.IoUtil ;
import cn.hutool.extra.servlet.ServletUtil ;
import com.alibaba.fastjson.JSON ;
import org.springframework.http.MediaType ;
import javax.servlet.http.HttpServletResponse ;
import java.io.IOException ;
import java.net.URLEncoder ;
/**
* 客户端工具类
*
* @author 芋道源码
*/
public class ServletUtils {
/**
* 返回 JSON 字符串
*
* @param response 响应
* @param object 对象，会序列化成 JSON 字符串
*/
@SuppressWarnings ( "deprecation" ) // 必须使用 APPLICATION_JSON_UTF8_VALUE，
public static void writeJSON ( HttpServletResponse response , Object object ) {
String content = JSON . toJSONString ( object ) ;
ServletUtil . write ( response , content , MediaType . APPLICATION_JSON_UTF8_VALUE ) ;
}
/**
* 返回附件
*
* @param response 响应
* @param filename 文件名
* @param content 附件内容
* @throws IOException
*/
public static void writeAttachment ( HttpServletResponse response , String filename , byte [ ] content ) throws IOException {
// 设置 header 和 contentType
response . setHeader ( "Content-Disposition" , "attachment;filename=" + URLEncoder . encode ( filename , "UTF-8" ) ) ;
response . setContentType ( MediaType . APPLICATION_OCTET_STREAM_VALUE ) ;
// 输出附件
IoUtil . write ( response . getOutputStream ( ) , false , content ) ;
}
}