EsbHeader SrcCalCod UMP SrcDate 20190903 SrcSysId 0332 VrsNo 100 SrcTime 165025 GloSeqNo G033220190903000000000004 ReqNo G033220190903000000000004 ScnNo 10 Header Actio

在Java中，可以使用StringBuilder或StringBuffer来拼接字符串。以下是使用StringBuilder进行字符串拼接的示例代码：

String esbHeader = "{\"SrcCalCod\":\"UMP\",\"SrcDate\":\"20190903\",\"SrcSysId\":\"0332\",\"VrsNo\":\"100\",\"SrcTime\":\"165025\",\"GloSeqNo\":\"G033220190903000000000004\",\"ReqNo\":\"G033220190903000000000004\",\"ScnNo\":\"10\"}";

String header = "{\"Action\":\"http://www.dongguanbank.cn/G0120006/02\",\"Address\":\"0332\"}";

String appBody = "{\"msg\":\"成功\",\"code\":0,\"data\":null,\"uuid\":\"8b3ff1a6-fb15-4893-8064-bac4118fc1b2\"}";

StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("{");
stringBuilder.append("\"EsbHeader\":").append(esbHeader).append(",");
stringBuilder.append("\"Header\":").append(header).append(",");
stringBuilder.append("\"APPBody\":").append(appBody);
stringBuilder.append("}");

String jsonString = stringBuilder.toString();