导致后台接收乱码原因：因为接口传参时，使用用了拦截器添加公共参数，而Post请求在拦截时，使用得时FormBody重新构建得参数表单。其内部得编码格式是固定的，无法设置。
查看FormBody编码方式源码：
override fun contentType() = CONTENT_TYPE
...
companion object {//可以看到FormBody表单内容编码方式不是UTF-8的
private val CONTENT_TYPE: MediaType = "application/x-www-form-urlencoded".toMediaType()
}
添加公共参数原代码：
if (method.equals("POST")) {
if (oldRequest.body() instanceof FormBody) {
FormBody.Builder bodyBuilder = new FormBody.Builder();//Charset.forName("UTF-8")
FormBody formBody = (FormBody) oldRequest.body();
for (int i = 0; i < formBody.size(); i++) {//---------------注意：一定需要将原来的参数添加到FormBody.Builder里面，等全部参数添加完后，再生成新连接
//Log.e("okhttp","formbody里面的参数："+i+formBody.name(i)+":"+formBody.value(i));
bodyBuilder.add(formBody.name(i), formBody.value(i));
}
for (Map.Entry<String, String> params : mUrlParamsMap.entrySet()) {
//原本写法
//formBody=bodyBuilder.add(params.getKey(),params.getValue()).build();
//修改
//POST请求方法添加公共参数
bodyBuilder.add(params.getKey(), params.getValue());
//Log.e("okhttp","公共参数Post"+params.getKey()+":"+params.getValue());
}
formBody = bodyBuilder.build();//修改
for (int i = 0; i < formBody.size(); i++) {
//Log.e("okhttp","body里面的参数："+i+formBody.name(i)+":"+formBody.value(i));
}
newRequest = oldRequest.newBuilder().post(formBody).build();
Response response = chain.proceed(newRequest);
String content = response.body().string();
MediaType contentType = response.body().contentType();
//Log.e("okhttp","执行拦截添加Post"+content+":"+newRequest.toString());
printUrl(newRequest, formBody);
return response.newBuilder()
.body(ResponseBody.create(content, contentType))
.build();
}
修改后代码：(把表单FormBody转换成RequestBody避免表单自动为参数进行编码)
if (method.equals("POST")) {
if (oldRequest.body() instanceof FormBody) {
FormBody.Builder bodyBuilder = new FormBody.Builder();//Charset.forName("UTF-8")
FormBody formBody = (FormBody) oldRequest.body();
for (int i = 0; i < formBody.size(); i++) {//---------------注意：一定需要将原来的参数添加到FormBody.Builder里面，等全部参数添加完后，再生成新连接
//Log.e("okhttp","formbody里面的参数："+i+formBody.name(i)+":"+formBody.value(i));
bodyBuilder.add(formBody.name(i), formBody.value(i));
}
for (Map.Entry<String, String> params : mUrlParamsMap.entrySet()) {
//原本写法
//formBody=bodyBuilder.add(params.getKey(),params.getValue()).build();
//修改
//POST请求方法添加公共参数
bodyBuilder.add(params.getKey(), params.getValue());
//Log.e("okhttp","公共参数Post"+params.getKey()+":"+params.getValue());
}
StringBuffer sb = new StringBuffer();
formBody = bodyBuilder.build();//修改
for (int i = 0; i < formBody.size(); i++) {
//Log.e("okhttp","body里面的参数："+i+formBody.name(i)+":"+formBody.value(i));
sb.append(formBody.name(i)+"="+formBody.value(i)+"&");
}
RequestBody requestBody = RequestBody.create(FORM_CONTENT_TYPE, sb.toString());
//.addHeader("Content-Type","application/x-www-form-urlencoded; charset=utf-8")
newRequest = oldRequest.newBuilder().post(requestBody).build();
Response response = chain.proceed(newRequest);
String content = response.body().string();
MediaType contentType = response.body().contentType();
//Log.e("okhttp","执行拦截添加Post"+content+":"+newRequest.toString());
printUrl(newRequest, formBody);
return response.newBuilder()
.body(ResponseBody.create(content, contentType))
.build();
}
传参编码处理：
//参数传入前，使用URLDecoder.decode(getChnlType(),"UTF-8")编码
if ("single".equals(indexBean.getConditionType())&&!TextUtils.isEmpty(getChnlTypeKey())
&&!TextUtils.isEmpty(getChnlType())){
map.put(getChnlTypeKey(),URLDecoder.decode(getChnlType(),"UTF-8"));
}
到此，问题解决
