Java通过Http请求服务器，返回EXCEL/TXT预览页面出现中文乱码解决办法

心已赠人 2023-01-16 11:11 48阅读 0赞

### **遇到的问题是：** ###

通过java请求服务器，在文件中心拿到文件EXCEL或者txt，返回到前端直接预览查看内容出现中文乱码

例如：

public void viewFile(){
    
        HttpServletResponse response = ((ServletRequestAttributes)RequestContexHolder.currentRequestAttributes()).getResponse();
    
        byte[] bytes = this.downloadFromFC();
    
        try(InputStream inputStream = new ByteArrayInputStream(bytes)){
    
            ExcelToHtmlParams params = new ExcelToHtmlParams(WorkBookFactory.create(inputStream));
    
            response.getOutputStream().write(ExcelXorHtmlUtil.excelToHtml(params).getBytes());
    
            response.setContentType("text/html");    
    
        }catch(Exception e){  
    
        }
    
    }

###    解决的方法： ###

①更改编码为UTF-8

②注意代码编码顺序（**极易忽略的问题，先声明编码，再写流**）

public void viewFile(){
    
        HttpServletResponse response = ((ServletRequestAttributes)RequestContexHolder.currentRequestAttributes()).getResponse();
    
        byte[] bytes = this.downloadFromFC();
    
        try(InputStream inputStream = new ByteArrayInputStream(bytes)){
    
            response.setCharacterEncoding("UTF-8");
    
            response.setContentType("text/html;charset=UTF-8");    
    
            ExcelToHtmlParams params = new ExcelToHtmlParams(WorkBookFactory.create(inputStream));
    
            response.getOutputStream().write(ExcelXorHtmlUtil.excelToHtml(params).getBytes());
    
        }catch(Exception e){  
    
        }
    
    }