Demo_StartProcess.java
package net.o2oa.demos;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.codec.binary.StringUtils;
import org.json.JSONArray;
import org.json.JSONObject;

import net.o2oa.demos.Demo_LoginToServer.LoginResult;

/**
 * 本例使用Java语言发送请求，向服务器进行认证后，启动一个新的流程，创建一个工单
 * @author O2OA
 *
 */
public class Demo_StartProcess {
    
    static final String URL_LOGIN="/x_processplatform_assemble_surface/jaxrs/work/process/";
    
    public static void main( String[] args ) {
        String applicationServer = "127.0.0.1";
        Integer applicationPort = 20020;
        String userName = "张三";
        String password = "o2";
        String identity ="测试部门  张三@9659e75d-b3f3-4eb3-bf26-52812d9228ec@I";
        
        String processFlag = "bc4b0018-edee-4225-838e-1b2db5c24f25";
        String processData = "{\"latest\":\"false\",\"title\":\"使用Java启动流程示例一\",\"identity\":\""+identity+"\",\"data\":\"{'name':'这是Name参数'}\"}";
        
        try {
            LoginResult result = Demo_LoginToServer.login(applicationServer, applicationPort, userName, password);
            if( StringUtils.equals( "success", result.getType() )) {
                //成功登录 到O2Server
                System.out.println("成功登录到O2Server！xtoken=" + result.getToken() );
                //启动指定的流程
                start( applicationServer, applicationPort, processFlag, processData, result.getToken() );
            }else {
                //登录失败
                System.out.println("登录失败！message:" + result.getMessage() );
            }           
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    public static List<String> start( String applicationServer, Integer applicationPort, String processFlag, String processData, String xtoken ) throws Exception {

        //将xtoken添加到httpHeader里，调用服务一定要添加认证过的token
        Map<String, String> headMap = getHeader( xtoken );

        String path = "http://" + applicationServer + ":" + applicationPort + URL_LOGIN + processFlag ;
        String responseData =  sendPost( path, processData, headMap);

        
        JSONObject jsonObj = new JSONObject( responseData );              
        JSONArray dataArray = jsonObj.getJSONArray("data");
        List<String> workIds = new ArrayList<>();
        if( dataArray != null && dataArray.length() > 0 ) {
            for (int i = 0; i < dataArray.length(); i++) {
                JSONObject data = (JSONObject) dataArray.get(i);
                String workid = data.getString("work");
                workIds.add( workid );
                System.out.println("流程启动完成，生成workId=" + workid);
            }
        }        
        return workIds;
    }
    
    public static String sendPost( String url, String param, Map<String,String> headers ) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            URLConnection conn = realUrl.openConnection();
            headers.entrySet().forEach( header->{
                conn.setRequestProperty(header.getKey(),header.getValue());
            });

            conn.setDoOutput(true);
            conn.setDoInput(true);
            out = new PrintWriter(conn.getOutputStream());
            out.print(param);
            out.flush();
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println(" POST" + e);
            e.printStackTrace();
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }
    
    public static Map<String, String> getHeader( String xtoken ) {
        Map<String, String> headMap = new HashMap<String, String>();
        headMap.put("x-token", xtoken );
        headMap.put("Cookie", "x-token=" + xtoken );
        headMap.put("accept", "*/*");
        headMap.put("connection", "Keep-Alive");
        headMap.put("Content-Type", "application/json; charset=utf-8");
        headMap.put("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
        return headMap;
    }
}

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>net.o2oa.demos</groupId>
    <artifactId>test_o2oa_java_demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>test_start_process_demo</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.10</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore-nio -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore-nio</artifactId>
            <version>4.4.12</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.12</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpmime -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.5.10</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.9</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.5</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.json/json -->
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20190722</version>
        </dependency>


        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>