Java中Servlet输出中文乱码问题

1.现象:字节流向浏览器输出中文,可能会乱码(IE低版本)

private void byteMethod(HttpServletResponse response) throws IOException, UnsupportedEncodingException {
        String date = "你好";
        ServletOutputStream outputStream = response.getOutputStream();
        outputStream.write(date.getBytes();
    }

原因:服务器端和浏览器端的编码格式不一致。

解决方法:服务器端和浏览器端的编码格式保持一致

private void byteMethod(HttpServletResponse response) throws IOException, UnsupportedEncodingException {
        String date = "你好";
        ServletOutputStream outputStream = response.getOutputStream();
        // 浏览器端的编码
        response.setHeader("Content-Type", "text/html;charset=utf-8");
        // 服务器端的编码
        outputStream.write(date.getBytes("utf-8"));
    }

或者简写如下

private void byteMethod(HttpServletResponse response) throws IOException, UnsupportedEncodingException {
        String date = "你好";
        ServletOutputStream outputStream = response.getOutputStream();
        // 浏览器端的编码
        response.setContentType("text/html;charset=utf-8");
        // 服务器端的编码
        outputStream.write(date.getBytes("utf-8"));
    }

2.现象:字符流向浏览器输出中文出现   ???乱码

private void charMethod(HttpServletResponse response) throws IOException {

        String date = "你好";
        PrintWriter writer = response.getWriter();
        writer.write(date);
    }

原因:表示采用ISO-8859-1编码形式,该编码不支持中文

解决办法:同样使浏览器和服务器编码保持一致

private void charMethod(HttpServletResponse response) throws IOException {

        // 处理服务器编码
         response.setCharacterEncoding("utf-8");
        // 处理浏览器编码
         response.setHeader("Content-Type", "text/html;charset=utf-8");

        String date = "中国";
        PrintWriter writer = response.getWriter();

        writer.write(date);
    }

注意!setCharacterEncoding()方法要在写入之前使用,否则无效!!!

或者简写如下

private void charMethod(HttpServletResponse response) throws IOException {

        response.setContentType("text/html;charset=GB18030");

        String date = "中国";
        PrintWriter writer = response.getWriter();

        writer.write(date);
    }    

总结:解决中文乱码问题使用方法 response.setContentType("text/html;charset=utf-8");可解决字符和字节的问题。

也可以看一下这位博主的文章,感觉思路很清晰。https://www.cnblogs.com/Survivalist/p/9015754.html

如有问题还望指正!

原文地址:https://www.cnblogs.com/springa/p/12687167.html