详解Java如何实现企业微信审批流程

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class WeChatApproval {
    //下面三个常量定义，需要用你自己的（企业微信开放平台）
    private static final String CORP_ID = "你的corp_id";
    private static final String CORP_SECRET = "你的corp_secret";
    private static final String APPROVAL_TEMPLATE_ID = "你的template_id"; // 审批模板ID

    // 获取 Access Token
    public static String getAccessToken() throws IOException {
        String url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=" + CORP_ID + "&corpsecret=" + CORP_SECRET;
        try (CloseableHttpClient client = HttpClients.createDefault()) {
            HttpGet request = new HttpGet(url);
            try (CloseableHttpResponse response = client.execute(request)) {
                String responseBody = EntityUtils.toString(response.getEntity());
                Map<String, Object> map = new ObjectMapper().readValue(responseBody, Map.class);
                return map.get("access_token").toString();
            }
        }
    }

    // 发起审批流程
    public static String initiateApproval(String accessToken, Map<String, Object> approvalData) throws IOException {
        String url = "https://qyapi.weixin.qq.com/cgi-bin/oa/applyevent?access_token=" + accessToken;
        try (CloseableHttpClient client = HttpClients.createDefault()) {
            HttpPost post = new HttpPost(url);
            post.setHeader("Content-Type", "application/json");

            Map<String, Object> requestMap = new HashMap<>();
            requestMap.put("template_id", APPROVAL_TEMPLATE_ID);
            requestMap.put("use_template_approver", 1); // 使用模板中的审批人
            requestMap.put("approver", approvalData.get("approver"));
            requestMap.put("apply_data", approvalData.get("apply_data"));
            requestMap.put("summary_list", approvalData.get("summary_list"));

            String json = new ObjectMapper().writeValueAsString(requestMap);
            post.setEntity(new StringEntity(json, "UTF-8"));

            try (CloseableHttpResponse response = client.execute(post)) {
                String responseBody = EntityUtils.toString(response.getEntity());
                Map<String, Object> map = new ObjectMapper().readValue(responseBody, Map.class);
                return map.get("sp_no").toString(); // 返回审批单编号
            }
        }
    }

    // 查询审批流程状态
    public static Map<String, Object> getApprovalDetail(String accessToken, String spNo) throws IOException {
        String url = "https://qyapi.weixin.qq.com/cgi-bin/oa/getapprovaldetail?access_token=" + accessToken;
        try (CloseableHttpClient client = HttpClients.createDefault()) {
            HttpPost post = new HttpPost(url);
            post.setHeader("Content-Type", "application/json");

            Map<String, Object> requestMap = new HashMap<>();
            requestMap.put("sp_no", spNo);

            String json = new ObjectMapper().writeValueAsString(requestMap);
            post.setEntity(new StringEntity(json, "UTF-8"));

            try (CloseableHttpResponse response = client.execute(post)) {
                String responseBody = EntityUtils.toString(response.getEntity());
                return new ObjectMapper().readValue(responseBody, Map.class);
            }
        }
    }

    public static void main(String[] args) {
        try {
            // 1. 获取Access Token
            String accessToken = getAccessToken();
            System.out.println("Access Token: " + accessToken);

            // 2. 发起审批流程
            Map<String, Object> approvalData = new HashMap<>();
            approvalData.put("approver", new Object[] { 
                Map.of("attr", 1, "userid", new String[] { "approver_userid" }) 
            });
            approvalData.put("apply_data", Map.of(
                "contents", new Object[] {
                    Map.of("control", "Text", "id", "Text-1", "value", Map.of("text", "请假事由")),
                    Map.of("control", "Date", "id", "Date-1", "value", Map.of("date", "2024-11-01"))
                }
            ));
            approvalData.put("summary_list", new Object[] {
                Map.of("summary_info", Map.of("text", "请假申请"))
            });
            String spNo = initiateApproval(accessToken, approvalData);
            System.out.println("审批单号: " + spNo);

            // 3. 查询审批状态
            Map<String, Object> approvalDetail = getApprovalDetail(accessToken, spNo);
            System.out.println("审批详情: " + approvalDetail);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}