sb.append("{\"openId\":\"");
sb.append(openId);
sb.append("\",\"content\":\"");
sb.append(content);
sb.append("\",\"headimgurl\":\"");
sb.append(headimgurl);
sb.append("\",\"nickname\":\"");
sb.append(nickname);
sb.append("\"");
sb.append("},");
String strObj = "{\"touser\":\""+openId+"\",\"msgtype\":\"text\",\"text\":{\"content\":\""+content+"\"}}";
其中openId，content均是变量