Android Post Json数据乱码问题

这两天在做注册功能时，昵称里有汉字，tomcat服务器后台日志及数据库的汉字都显示?问号。服务器是CentOS 7.0, 将系统语言配置成 LANG=zh_CN.UTF-8，服务器端代码的web.xml中已经添加了org.springframework.web.filter.CharacterEncodingFilter的Filter。结果还是乱码，问题可能出在Android客户端上。网上查了些资料，并尝试了更改不同位置的代码，定位到了问题。

Json数据如下格式：

{"phone":"18688888888","passwd":"123456","nickname":"汉字","verifycode":"2769"}

private static final String APPLICATION_JSON = "application/json;charset=utf-8";

public static <T extends Result> T postJson(String url, String postBodyJson, Class<T> clazz) throws IOException {
if (StringUtils.isEmpty(url) || StringUtils.isEmpty(postBodyJson)) {
Log.e(TAG, "url/postBodyJson should not be null");
return null;
}

DefaultHttpClient httpClient = getHttpClient();
httpClient.getParams().setIntParameter(HttpConnectionParams.CONNECTION_TIMEOUT, TIMEOUT);
httpClient.getParams().setIntParameter(HttpConnectionParams.SO_TIMEOUT, TIMEOUT);

HttpPost httpPost = new HttpPost(url);

StringEntity stringEntity = new StringEntity(postBodyJson);
stringEntity.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, APPLICATION_JSON));
httpPost.setEntity(stringEntity);

httpPost.setHeader(HTTP.USER_AGENT, "xxx/1.0");
httpPost.setHeader(HTTP.CONTENT_TYPE, APPLICATION_JSON);
httpPost.setHeader("Accept", APPLICATION_JSON);

PersistentCookieStore cookieStore = MyFragment.getInstance().getCookieStore();
httpClient.setCookieStore(cookieStore);

HttpResponse response = httpClient.execute(httpPost);
int code = response.getStatusLine().getStatusCode();

if (HttpStatus.SC_OK == code) {

//Login succeed
if (StringUtils.isNotEmpty(url) && url.contains(Config.REQUEST_URL_LOGIN)) {
//Save cookies
List<Cookie> cookies = httpClient.getCookieStore().getCookies();

for (Cookie cookie : cookies) {
cookieStore.addCookie(cookie);
}
}

String rspStr = EntityUtils.toString(response.getEntity(), HTTP.UTF_8);
Log.d(TAG, rspStr);

T result = null;
try {
result = JSONHelper.parseObject(rspStr, clazz);
} catch (JSONException e) {
e.printStackTrace();
}

return result;

} else if (HttpStatus.SC_UNAUTHORIZED == code) {
throw new UnauthorizedException("Unauthorized. Need to login again.");
} else {
throw new IOException("ERROR: rspCode=" + code + "-" + response.getEntity().toString());
}
}

尝试了增加声明utf-8的header和stringEntity.setContentEncoding之后，问题依旧。

其中，如下一行

StringEntity stringEntity = new StringEntity(postBodyJson);

增加UTF-8编码后，再测试数据库和tomcat log已经变成了汉字，问题解决。

StringEntity stringEntity = new StringEntity(postBodyJson, "UTF-8"); //不带UTF-8，汉字会是乱码

参考：
http://blog.csdn.net/bonnshore/article/details/18327881 http://www.jb51.net/article/49132.htm http://chaico.iteye.com/blog/1954128