Android POST请求上传中文到 JAVA 后台服务器显示乱码

Question

Android这边使用的是OKHTTP3作为网络框架的，我查了一下发现它的默认编码就是UTF-8，请求时使用了一个工具类来提交POST请求，代码如下：

 public static Object[] postHttp(Context context, String url, HashMap<String, String> params, String cachetype, int cacheseconds) {

        try {
            // 缓存文件夹
            File cacheFile = new File(context.getExternalCacheDir().toString(), "cache");
            // 缓存大小为50M
            int cacheSize = 50 * 1024 * 1024;
            // 创建缓存对象
            final Cache cache = new Cache(cacheFile, cacheSize);

            OkHttpClient mOkHttpClient = new OkHttpClient.Builder()
                    .connectTimeout(10, TimeUnit.SECONDS)
                    .readTimeout(20, TimeUnit.SECONDS)
                    .cache(cache)
                    .build();

            FormBody.Builder formBodyBuilder = new FormBody.Builder();
            for (Map.Entry<String, String> entry : params.entrySet())
                formBodyBuilder.add(entry.getKey(), entry.getValue());
            RequestBody formBody = formBodyBuilder.build();

            CacheControl cacheControl = null;
            if (cachetype.equals(TYPE_CACHE_CONTROL)) {
                cacheControl = new CacheControl.Builder()
                        .maxAge(cacheseconds, TimeUnit.SECONDS).build();
            }
            if (cachetype.equals(TYPE_FORCE_CACHE)) {
                cacheControl = FORCE_CACHE;
            }
            if (cachetype.equals(TYPE_FORCE_NETWORK)) {
                cacheControl = FORCE_NETWORK;
            }

            Request request = new Request.Builder()
                    .cacheControl(cacheControl)
                    .url(url)
                    .post(formBody)
                    .build();
            Response response = mOkHttpClient.newCall(request).execute();
            String result = response.body().string();
            // ...
        } catch (Exception e) {
            // ...
        }
    }

JAVA后台已经设置了编码：

request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");

TOMCAT中的server.xml中也进行了设置：

 <Connector port="8080" protocol="HTTP/1.1"
               useBodyEncodingForURI="true"
               URIEncoding="utf-8"
         connectionTimeout="20000"
         redirectPort="8443" />

Android上传中文的时候，服务器接收到的是%E5%95%A6%E5%95%A6%E5%95%A6这样的编码。

这个问题困扰了我很久，请问有大神知道解决方案吗？

Answer 1

System.out.println(URLDecoder.decode("%E5%95%8A","utf-8"));//解码