本实例主要是将企业信息添加进区块链,然后实现对企业信息进行查询溯源,对区块链有新增、查询、修改、删除、查看历史等功能。
1、准备一个bsn-springboot项目
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.yuyun</groupId>
<artifactId>springboot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot</name>
<description>springboot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2、引入jar包
项目下新建一个lib
目录,将jar包放入
然后再pom.xml文件引入该jar包
<dependency>
<groupId>com.example.javacc</groupId>
<artifactId>bsn-sdk-java</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>system</scope>
<systemPath>${pom.basedir}/lib/bsn-sdk-java-jar-with-dependencies.jar</systemPath>
</dependency>
3、区块链配置
方法一:新建config.json文件
在resources目录下新建个config目录,再在其中新建config.json文件,格式如下:
{
"userPrivateKey": "",
"bsnPublicKey": "",
"appCode": "",
"userCode": "",
"nodeApi": "",
"mspPath": ""
}
其中的内容,打开区块链官网我参与的服务
点击下载秘钥,下载解压后的文件,userAppCert目录中的两个文件,一个是私钥,一个是公钥,分别对应config.json中的userPrivateKey和bsnPublicKey
将两个文件里面的所有内容复制了放入,例如:
{
"userPrivateKey": "-----BEGIN PRIVATE KEY-----\nMIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgVbS8svrC3sdFgIFW\nUoLfczfjCjq0z7fGTSFfqMkjssChRANCAARXn4a1tA3PB8+wx9UgU0GDfGBG7BXZ\nENL5GN3vYXqpcbCtvxAtINSK02KcQ1a6jAASy79T0ax9KfQDjzGVFN9K\n-----END PRIVATE KEY-----",
"bsnPublicKey": "-----BEGIN PUBLIC KEY-----\nMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEV5+GtbQNzwfPsMfVIFNBg3xgRuwV\n2RDS+Rjd72F6qXGwrb8QLSDUitNinENWuowAEsu/U9GsfSn0A48xlRTfSg==\n-----END PUBLIC KEY-----",
"appCode": "app008809d6356825a4c249be16572723c6225",
"userCode": "USER0001202112061433104102226",
"nodeApi": "http://52.83.209.158:17502",
"mspPath": ""
}
方法二:直接将userAppCert目录中的两个文件放进resources目录下
4、初始化config方法
如果区块链配置采用方法一,初始化config的代码如下:
public void initConfig() {
String filePath = "config/config.json";
Config config = Config.buildByConfigJson(filePath);
config.initConfig(config);
}
如果采用方法二,初始化config的代码如下:
public void initConfig() throws IOException {
Config config = new Config();
config.setAppCode("app008809d6356825a4c249be16572723c6225");
config.setUserCode("USER0001202112061433104102226");
config.setApi("http://52.83.209.158:17502");
config.setPrk(Common.readFile("cert/private_key.pem"));
config.setPuk(Common.readFile("cert/public_key.pem"));
config.setMspDir("");
config.initConfig(config);
}
本实例采用方法一
5、具体实现
新建一个Service层代码,具体如下:
package com.yuyun.service;
import com.yuyun.dto.BsnHistoryDTO;
import com.yuyun.dto.CompanyDTO;
import java.io.IOException;
import java.util.List;
/**
* @author hyh
*/
public interface FabricBsnService {
/**
* 保存(添加or修改)
*
* @param key 键值
* @param body 内容
* @return 成功 true
* @return Boolean
*/
Boolean save(String key, String body);
/**
* 查询
*
* @param key 键值
* @return 结果
*/
CompanyDTO query(String key);
/**
* 历史查询
*
* @param key 键值
* @return 解密后的结果
* @throws IOException 异常
*/
List<BsnHistoryDTO> getHistory(String key) throws IOException;
/**
* 删除
*
* @param key 键值
* @return 成功 true
* @return Boolean
*/
Boolean delete(String key);
}
新建Service类的实现
package com.yuyun.service.impl;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.bsnbase.sdk.client.fabric.FabricClient;
import com.bsnbase.sdk.entity.config.Config;
import com.bsnbase.sdk.entity.req.fabric.ReqKeyEscrow;
import com.bsnbase.sdk.entity.res.fabric.ResKeyEscrow;
import com.yuyun.dto.BsnHistoryDTO;
import com.yuyun.dto.CompanyDTO;
import com.yuyun.service.FabricBsnService;
import com.yuyun.utils.Base64Utils;
import lombok.extern.log4j.Log4j2;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
/**
* @author hyh
*/
@Log4j2
@Service
public class FabricBsnServiceImpl implements FabricBsnService {
/**
* 初始化config
*/
public void initConfig() {
String filePath = "config/config.json";
Config config = Config.buildByConfigJson(filePath);
config.initConfig(config);
}
public String reqChainCode(String key, String funcName, String body) {
try {
initConfig();
ReqKeyEscrow keyEscrow = new ReqKeyEscrow();
String[] args;
if (StringUtils.isNotBlank(body)) {
args = new String[]{key, body};
} else {
args = new String[]{key};
}
keyEscrow.setArgs(args);
keyEscrow.setFuncName(funcName);
//链码部署名称,在我参与的服务信息中可以找到
keyEscrow.setChainCode("cc_app0001");
keyEscrow.setTransientData(new HashMap<>());
ResKeyEscrow resKeyEscrow = FabricClient.reqChainCode(keyEscrow);
if (200 == resKeyEscrow.getCcRes().getCcCode()) {
String str = resKeyEscrow.getCcRes().getCcData();
if ("null".equals(str)) {
return null;
}
return str;
}
} catch (Exception e) {
throw new RuntimeException("区块链访问失败:" + e.getMessage());
}
return null;
}
@Override
public Boolean save(String key, String body) {
log.info("key:" + key);
String s = reqChainCode(key, "Set", body);
return StringUtils.isNotBlank(s);
}
@Override
public CompanyDTO query(String key) {
String queryStr = reqChainCode(key, "Query", null);
if (StringUtils.isBlank(queryStr)) {
return null;
}
JSONObject jsonObject = JSONObject.parseObject(queryStr);
return jsonObject.toJavaObject(CompanyDTO.class);
}
@Override
public List<BsnHistoryDTO> getHistory(String key) throws IOException {
String historyStr = reqChainCode(key, "History", null);
if (StringUtils.isBlank(historyStr)) {
return new ArrayList<>();
}
JSONArray jsonArray = JSONArray.parseArray(historyStr);
List<BsnHistoryDTO> bsnHistoryDTOList = jsonArray.toJavaList(BsnHistoryDTO.class);
for (BsnHistoryDTO b : bsnHistoryDTOList) {
if (null != b) {
String value = Base64Utils.Base64Decode(b.getValue().getBytes());
if (StringUtils.isNotBlank(value)) {
JSONObject jsonObject = JSONObject.parseObject(value);
CompanyDTO companyDTO = jsonObject.toJavaObject(CompanyDTO.class);
b.setCompanyDTO(companyDTO);
}
b.setValue("");
}
}
return bsnHistoryDTOList;
}
@Override
public Boolean delete(String key) {
String s = reqChainCode(key, "Delete", null);
return "success".equals(s);
}
}
新建Controller层
package com.yuyun.controller;
import com.yuyun.dto.BsnHistoryDTO;
import com.yuyun.dto.CompanyDTO;
import com.yuyun.service.FabricBsnService;
import com.yuyun.utils.Result;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.io.IOException;
import java.util.List;
/**
* @author hyh
*/
@RestController
@RequestMapping("fabricBsn")
@Api(tags = "区块链")
public class FabricBsnController {
@Autowired
private FabricBsnService fabricBsnService;
@GetMapping("history/{key}")
@ApiOperation("历史记录")
public Result<List<BsnHistoryDTO>> history(@PathVariable("key") String key) throws IOException {
List<BsnHistoryDTO> bsnHistoryDTOList = fabricBsnService.getHistory(key);
return new Result<List<BsnHistoryDTO>>().success(bsnHistoryDTOList);
}
@GetMapping("query/{key}")
@ApiOperation("信息")
public Result<CompanyDTO> get(@PathVariable("key") String key) {
CompanyDTO data = fabricBsnService.query(key);
return new Result<CompanyDTO>().success(data);
}
@DeleteMapping("{key}")
@ApiOperation("删除")
public Result<Object> delete(@PathVariable("key") String key) {
return new Result<>().ok(fabricBsnService.delete(key));
}
}
在企业管理中调用区块链的方法
先引入,再调用
@Autowiredprivate FabricBsnService fabricBsnService;
- 新增信息
fabricBsnService.save("company_" + companyDTO.getId(), JSON.toJSONString(companyDTO));
- 修改信息
fabricBsnService.save("company_" + companyDTO.getId(), JSON.toJSONString(companyDTO));
- 删除信息
fabricBsnService.delete("company_" + id);
6、运行效果
(1)添加企业信息
(2)查看企业信息
(3)查看区块链信息
(4)修改企业信息
(5)再次查看区块链信息
(6)删除企业信息
(7)第三次查看区块链信息
可以看到信息已经被删除了
(8)查看区块链历史记录
返回结果如下,所有的信息历史都在里面
{
"code": 0,
"msg": "success",
"data": [
{
"key": "company_1473572863141011458",
"txId": "55dab6883d0f0d29b45175a5d98b3816b24be39af35f5fb012b165019769db23",
"isDelete": "true",
"time": "2021-12-22T00:42:03.498+00:00",
"value": "",
"companyDTO": null
},
{
"key": "company_1473572863141011458",
"txId": "9b8a0509eb37546cec7e50d0f854eea8030caf67904221b695bba0ea00742396",
"isDelete": "false",
"time": "2021-12-22T00:40:21.797+00:00",
"value": "",
"companyDTO": {
"id": 1473572863141011458,
"companyName": "企业名称1",
"description": "企业描述2",
"businessLicense": "测试营业执照3",
"address": "测试地址4",
"status": null,
"remarks": "备注5",
"createDate": null,
"updateDate": null
}
},
{
"key": "company_1473572863141011458",
"txId": "c1deb5b1911509347878d67af6c1e28b45ac37a1916f0d4c32e917d937a5b1a8",
"isDelete": "false",
"time": "2021-12-22T00:35:25.207+00:00",
"value": "",
"companyDTO": {
"id": 1473572863141011458,
"companyName": "企业名称",
"description": "企业描述",
"businessLicense": "测试营业执照",
"address": "测试地址",
"status": null,
"remarks": "备注",
"createDate": null,
"updateDate": null
}
}
]
}