报错：Message is larger than modules

我们将请求体加密后，访问后台，在获取applyData时报错。

原代码如下：

public class DataEncrypt2Test {
    public static void main(String[] args) throws Exception {
        String pubKey = "省略不写";// 生产批次
        StringBuilder sb = new StringBuilder();
        sb.append("很长字符串1，省略不写，下同");
        sb.append("很长字符穿2");
        sb.append("很长字符串3");
        sb.append("很长字符串4");
        sb.append("很长字符串5");
        sb.append("很长字符串6");
        sb.append("很长字符串7" );
        sb.append("很长字符串8");
        sb.append("很长字符串9");
        sb.append("很长字符串10");
        sb.append("很长字符串11");
        String str = sb.toString();
        
        String requestData = "{\n" +
                "\t\"ycocode\": \"09876543211234567890\",\n" +
                "\t\"yconame\": \"众益制药\",\n" +
                "\t\"medicode\": \"B1243253\",\n" +
                "\t\"mediname\": \"当归\",\n" +
                "\t\"allowname\": \"张山\",\n" +
                "\t\"locality\": \"深圳\",\n" +
                "\t\"batchno\": \"B345353\",\n" +
                "\t\"batchciid\": \"3452352\",\n" +
                "\t\"prodate\": \"2021-10-10\",\n" +
                "\t\"checkdate\": \"2021-11-11\",\n" +
                "\t\"packgg\": \"10/箱\",\n" +
                "\t\"checkname\": \"王五\",\n" +
                "\t\"norm\": \"国标\",\n" +
                "\t\"arts\": \"工艺01\",\n" +
                "\t\"yreport\": \""+ str +"\",\n" +
                "\t\"updatetime\": \"2021-12-12\",\n" +
                "\t\"ybatchid\": \"1232141\",\n" +
                "\t\"quantity\": \"100\",\n" +
                "\t\"unit\": \"kg\",\n" +
                "\t\"checkname\": \"王五\",\n" +
                "\t\"billtype\": \"销售出库\"\n" +
                "}";
        
        String encrypt = RSAUtils.encryptByPublicKey(requestData, pubKey);
        System.out.println("requestData===> ");
        System.out.println(encrypt);
　　}
}
        

后台代码：

@RestController
@RequestMapping("/api")
public class ProducerBatchController {
    @Autowired
    private ProduceBatchService produceBatchService;

    @PostMapping("/pro")
    @ResponseBody
    public String saveProduce(@RequestBody JSONObject params) {
        JSONObject applyData = params.getJSONObject("applyData");
        return produceBatchService.saveProduceBatch(applyData);
    }

}

从params中获取applyData时报错：Message is larger than modules

原因分析：由于requestData中有很多\t或\n，并不是纯粹的json字符串，导致fastjson在解析的时候报错。

解决办法，封装成JSONObject

public class DataEncrypt2Test {
    public static void main(String[] args) throws Exception {
        String pubKey = "省略不写";// 生产批次
        StringBuilder sb = new StringBuilder();
        sb.append("很长字符串1，省略不写，下同");
        sb.append("很长字符穿2");
        sb.append("很长字符串3");
        sb.append("很长字符串4");
        sb.append("很长字符串5");
        sb.append("很长字符串6");
        sb.append("很长字符串7" );
        sb.append("很长字符串8");
        sb.append("很长字符串9");
        sb.append("很长字符串10");
        sb.append("很长字符串11");
        String str = sb.toString();
        
        JSONObject json = new JSONObject();
        json.put("ycocode","09876543211234567890");
        json.put("yconame","华润制药");
        json.put("medicode","B1243253");
        json.put("mediname","当归");
        json.put("allowname","张山");
        json.put("locality","深圳");
        json.put("batchno","B345353");
        json.put("batchciid","3452352");
        json.put("prodate","2021-10-10");
        json.put("checkdate","2021-11-11");
        json.put("packgg","10/箱");
        json.put("checkname","王五");
        json.put("norm","国标");
        json.put("arts","工艺01");
        json.put("yreport",str);
        json.put("creport",str);
        json.put("updatetime","2021-12-12");
        json.put("ybatchid","1232141");
        json.put("unit","kg");
        json.put("quantity","100");
        json.put("billtype","销售出库");
        
        String encrypt = RSAUtils.encryptByPublicKey(json.toString(), pubKey);
        System.out.println("requestData===> ");
        System.out.println(encrypt);
　　}
}

问题解决。