写阿里服务辨认车牌号功能碰到的bug【包含使用阿里服务辨认车牌号功能代码 ...

1. Exception in thread "main" java.lang.NoSuchMethodError: com.aliyun.credentials.Client.getCredential()Lcom/aliyun/credentials/models/CredentialModel;
2.         at com.aliyun.teaopenapi.Client.doRequest(Client.java:812)
3.         at com.aliyun.teaopenapi.Client.callApi(Client.java:1080)
4.         at com.aliyun.openplatform20191219.Client.authorizeFileUploadWithOptions(Client.java:46)
5.         at com.aliyun.ocr20191230.Client.recognizeLicensePlateAdvance(Client.java:770)
6.         at com.utils.RecognizeLicensePlateAli.main(RecognizeLicensePlateAli.java:59)

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其实解决bug很简单，是缺了个包，而且这个是运行时异常

1.   <dependency>
2.             <groupId>com.aliyun</groupId>
3.             <artifactId>tea-openapi</artifactId>
4.             <version>0.2.1</version>
5.         </dependency>
6.         <!-- 还有这个识别用的包 -->
7.         <dependency>
8.             <groupId>com.aliyun</groupId>
9.             <artifactId>ocr20191230</artifactId>
10.             <version>2.0.1</version>
11.         </dependency>

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1. package com.utils;
4. /*
5. 引入依赖包
6. <!-- https://mvnrepository.com/artifact/com.aliyun/ocr20191230 -->
7. <dependency>
8.       <groupId>com.aliyun</groupId>
9.       <artifactId>ocr20191230</artifactId>
10.       <version>${aliyun.ocr.version}</version>
11. </dependency>
12. */
14. import cn.hutool.core.collection.CollUtil;
15. import com.aliyun.ocr20191230.models.RecognizeLicensePlateResponse;
16. import com.aliyun.ocr20191230.models.RecognizeLicensePlateResponseBody;
17. import com.aliyun.tea.TeaException;
18. import org.springframework.web.bind.annotation.GetMapping;
20. import java.io.File;
21. import java.io.InputStream;
22. import java.nio.file.Files;
23. import java.util.List;
24. import java.util.Optional;
26. public class RecognizeLicensePlateAli {
28.     public static String accessKeyId = "ABC123456";
30.     public static String accessKeySecret = "ABC123456";
32.     public static com.aliyun.ocr20191230.Client createClient(String accessKeyId, String accessKeySecret) throws Exception {
33.         /*
34.           初始化配置对象com.aliyun.teaopenapi.models.Config
35.           Config对象存放 AccessKeyId、AccessKeySecret、endpoint等配置
36.          */
37.         com.aliyun.teaopenapi.models.Config config = new com.aliyun.teaopenapi.models.Config()
38.                 .setAccessKeyId(accessKeyId)
39.                 .setAccessKeySecret(accessKeySecret);
40.         // 访问的域名
41.         config.endpoint = "ocr.cn-shanghai.aliyuncs.com";
42.         return new com.aliyun.ocr20191230.Client(config);
43.     }
46.     public String licensePlate(String filePath) throws Exception {
47.         com.aliyun.ocr20191230.Client client = RecognizeLicensePlateAli.createClient(accessKeyId, accessKeySecret);
48.         File file = new File(filePath);
49.         // 创建InputStream
50.         InputStream inputStream = Files.newInputStream(file.toPath());
51.         com.aliyun.ocr20191230.models.RecognizeLicensePlateAdvanceRequest recognizeLicensePlateAdvanceRequest = new com.aliyun.ocr20191230.models.RecognizeLicensePlateAdvanceRequest()
52.                 .setImageURLObject(inputStream);
53.         com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
54.         try {
55.             RecognizeLicensePlateResponse response = client.recognizeLicensePlateAdvance(recognizeLicensePlateAdvanceRequest, runtime);
56.             List<RecognizeLicensePlateResponseBody.RecognizeLicensePlateResponseBodyDataPlates> recognizeLicensePlateResponseBodyDataPlates = Optional.of(response).map(RecognizeLicensePlateResponse::getBody).map(RecognizeLicensePlateResponseBody::getData).map(RecognizeLicensePlateResponseBody.RecognizeLicensePlateResponseBodyData::getPlates).orElse(null);
57.             if (CollUtil.isNotEmpty(recognizeLicensePlateResponseBodyDataPlates)) {
58.                 RecognizeLicensePlateResponseBody.RecognizeLicensePlateResponseBodyDataPlates data = recognizeLicensePlateResponseBodyDataPlates.get(0);
59.                 String plateNumber = data.getPlateNumber();
60.                 System.out.println(plateNumber);
61.             }
62.         } catch (TeaException error) {
63.             // 获取整体报错信息
64.             System.out.println(com.aliyun.teautil.Common.toJSONString(error));
65.             // 获取单个字段
66.             System.out.println(error.getCode());
67.         }
68.         return "";
69.     }
71.     public static void main(String[] args) throws Exception {
72.         // 创建AccessKey ID和AccessKey Secret，请参见：https://help.aliyun.com/document_detail/175144.html
73.         // 如果您使用的是RAM用户的AccessKey，还需要为子账号授予权限AliyunVIAPIFullAccess，请参见：https://help.aliyun.com/document_detail/145025.html
74.         // 从环境变量读取配置的AccessKey ID和AccessKey Secret。运行代码示例前必须先配置环境变量。
75. //        String accessKeyId = System.getenv("LTAI5t6ija1dt5E5vPh4nnDX");
76. //        String accessKeySecret = System.getenv("brRgmpD7Ch7NUiIiqKJO7kZC5jJZVA");
77.         com.aliyun.ocr20191230.Client client = RecognizeLicensePlateAli.createClient(accessKeyId, accessKeySecret);
78.         // 场景一，使用本地文件
79.         // InputStream inputStream = new FileInputStream(new File("/tmp/RecognizeLicensePlate1.jpg"));
80.         // 场景二，使用任意可访问的url
81. //        URL url = new URL("http://viapi-test.oss-cn-shanghai.aliyuncs.com/viapi-3.0domepic/ocr/RecognizeLicensePlate/cpsb1.jpg");
82. //        InputStream inputStream = url.openConnection().getInputStream();
83.         File file = new File("C:\\Users\\Administrator\\Desktop\\123.jpg");
84.         // 创建InputStream
85.         InputStream inputStream = Files.newInputStream(file.toPath());
86.         com.aliyun.ocr20191230.models.RecognizeLicensePlateAdvanceRequest recognizeLicensePlateAdvanceRequest = new com.aliyun.ocr20191230.models.RecognizeLicensePlateAdvanceRequest()
87.                 .setImageURLObject(inputStream);
88.         com.aliyun.teautil.models.RuntimeOptions runtime = new com.aliyun.teautil.models.RuntimeOptions();
89.         try {
90.             // 复制代码运行请自行打印 API 的返回值
91.             RecognizeLicensePlateResponse response = client.recognizeLicensePlateAdvance(recognizeLicensePlateAdvanceRequest, runtime);
92.             List<RecognizeLicensePlateResponseBody.RecognizeLicensePlateResponseBodyDataPlates> recognizeLicensePlateResponseBodyDataPlates = Optional.of(response).map(RecognizeLicensePlateResponse::getBody).map(RecognizeLicensePlateResponseBody::getData).map(RecognizeLicensePlateResponseBody.RecognizeLicensePlateResponseBodyData::getPlates).orElse(null);
93.             if (CollUtil.isNotEmpty(recognizeLicensePlateResponseBodyDataPlates)) {
94.                 RecognizeLicensePlateResponseBody.RecognizeLicensePlateResponseBodyDataPlates data = recognizeLicensePlateResponseBodyDataPlates.get(0);
95.                 String plateNumber = data.getPlateNumber();
96.                 System.out.println(plateNumber);
97.             }
98.         } catch (TeaException error) {
99.             // 获取整体报错信息
100.             System.out.println(com.aliyun.teautil.Common.toJSONString(error));
101.             // 获取单个字段
102.             System.out.println(error.getCode());
103.         }
104.     }
105. }

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