WEB后台使用UTF-8进行编码，由于D7默认是ansiString，直接提交到后台会使中文乱码。

解决方法：

1.先把AnsiString转WideString

2.通过System单元中的ansitoUTF8()函数进行转换之后再提交就可以了。

代码示例：

procedure postDemo();
varAURL: String;APostList: TStringList; // 提交参数ListAPostStream : TStringStream; // 流提交APostWideString:WideString;AResponseStream: TStringStream; // 接收流AResponse: String;
beginAURL:=''; // 接口地址AResponseStream := TStringStream.Create('');APostList:= TStringList.Create; APostList.add('user=测试');APostList.add('id=123456');APostList.add('code=HA123');APostWideString := APostList.text;APostStream :=TStringStream.Create(ansitoUTF8(APostWideString));try // WideString 调用ansitoUTF8进行UTF-8编码才行APostList.text := ansitoUTF8(APostWideString);IdHTTP.Request.ContentType := 'application/x-www-form-urlencoded; Charset=UTF-8';// List 提交IdHTTP.Post(AURL, APostList, AResponseStream);// 字符串提交IdHTTP.Post(AURL, ansitoUTF8(APostWideString), AResponseStream);// 流提交IdHTTP.Post(AURL, APostStream, AResponseStream);// AResponse 接收到的返回用UTF-8解码AResponse := UTF8toansi( AResponseStream.DataString );finallyAPostList.Clear;APostList.Free; APostStream.Free;AResponseStream.Free;end; end;