java.lang.ClassNotFoundException: org.junit.Assert / 使用文档化 API

Question

I have encountered these errors when trying to implement the docusing embedded signature into my web app (java -eclipse).

java.lang.ClassNotFoundException: org.junit.Assert
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1412)
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1220)
    com.uniquedeveloper.registration.test2.EmbeddedSigningTest(test2.java:94)
    com.uniquedeveloper.registration.test2.doPost(test2.java:79)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Here is my code for the test2 class:

    package com.uniquedeveloper.registration;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.nio.file.Files;
    import java.nio.file.Path;
    import java.nio.file.Paths;
    import java.util.ArrayList;
    import java.util.Base64;
    import java.util.List;
    import java.util.stream.Collectors;
    
    import javax.servlet.ServletContext;
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.Part;
    import javax.servlet.jsp.PageContext;
    
    import org.apache.tomcat.util.http.fileupload.FileUpload;
    import static org.junit.Assert.*;
    
    import org.junit.Assert;
    import org.junit.Test;
    
    import com.docusign.esign.api.EnvelopesApi;
    import com.docusign.esign.client.ApiClient;
    import com.docusign.esign.client.ApiException;
    import com.docusign.esign.model.Document;
    import com.docusign.esign.model.EnvelopeDefinition;
    import com.docusign.esign.model.EnvelopeSummary;
    import com.docusign.esign.model.RecipientViewRequest;
    import com.docusign.esign.model.Recipients;
    import com.docusign.esign.model.SignHere;
    import com.docusign.esign.model.Signer;
    import com.docusign.esign.model.Tabs;
    import com.docusign.esign.model.ViewUrl;
    
    /**
     * Servlet implementation class test2
     */
    @WebServlet("/test2")
    public class test2 extends HttpServlet {
        private static final long serialVersionUID = 1L;
        
        
           
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            String rEmail = request.getParameter("recipientem");
            String rName = request.getParameter("recipientname");
        /*Part file = request.getPart("file_upload");
            */
            
            /* String filePath = (String)request.getServletContext().getInitParameter("file_upload");*/
            
            /*Part filePart = request.getPart("file_upload");
            String fileName=filePart.getSubmittedFileName();
            for(Part part : request.getParts()) {
                part.write("C:\\Bureau\\"+ fileName);
            */
            
            /*Part filePart = request.getPart("file_upload");
            InputStream filecontent = filePart.getInputStream();
            
            if (filePart != null) {
                filecontent = filePart.getInputStream();
            }
            else {
                System.out.println("KHAWI");
            }*/
        
             String filePath = (String)request.getServletContext().getInitParameter("file_upload");
             System.out.println("ZWIN1");
            
                    EmbeddedSigningTest(rEmail, rName, filePath);
                
                  }
    
        @Test
        public void EmbeddedSigningTest(String rEmail, String rName, String filePath ) {
             String AccountId = "16501888";
            System.out.println("\nEmbeddedSigningTest:\n" + "===========================================");
            byte[] fileBytes = null;
            try {
                String currentDir = System.getProperty("user.dir");
    
                Path path = Paths.get(currentDir + filePath);
                fileBytes = Files.readAllBytes(path);
                
            } catch (IOException ioExcp) {
                Assert.assertNull(ioExcp);
            }
            System.out.println("ZWIN2");
            // create an envelope to be signed
            EnvelopeDefinition envDef = new EnvelopeDefinition();
            envDef.setEmailSubject("Please Sign my Java SDK Envelope (Embedded Signer)");
            envDef.setEmailBlurb("Hello, Please sign my Java SDK Envelope.");
    
            // add a document to the envelope
            Document doc = new Document();
            String base64Doc = Base64.getEncoder().encodeToString(fileBytes);
            doc.setDocumentBase64(base64Doc);
            doc.setName(filePath);
            doc.setDocumentId("1");
    
            List<Document> docs = new ArrayList<>();
            docs.add(doc);
            envDef.setDocuments(docs);
    
            // Add a recipient to sign the document
            Signer signer = new Signer();
            signer.setEmail(rEmail);
            String name = "Pat Developer";
            signer.setName(rName);
            signer.setRecipientId("1");
    
            // this value represents the client's unique identifier for the signer
            String clientUserId = "2adce842-15eb-4744-9807-5a82020cc313 ";
            signer.setClientUserId(clientUserId);
    
            // Create a SignHere tab somewhere on the document for the signer to
            // sign
            SignHere signHere = new SignHere();
            signHere.setDocumentId("1");
            signHere.setPageNumber("1");
            signHere.setRecipientId("1");
            signHere.setXPosition("100");
            signHere.setYPosition("100");
            signHere.setScaleValue("0.5");
    
            List<SignHere> signHereTabs = new ArrayList<>();
            signHereTabs.add(signHere);
            Tabs tabs = new Tabs();
            tabs.setSignHereTabs(signHereTabs);
            signer.setTabs(tabs);
    
            // Above causes issue
            envDef.setRecipients(new Recipients());
            envDef.getRecipients().setSigners(new ArrayList<>());
            envDef.getRecipients().getSigners().add(signer);
    
            // send the envelope (otherwise it will be "created" in the Draft folder
            envDef.setStatus("sent");
    
            try {
                EnvelopesApi envelopesApi = new EnvelopesApi();
                EnvelopeSummary envelopeSummary = envelopesApi.createEnvelope(AccountId, envDef);
    
                Assert.assertNotNull(envelopeSummary);
                Assert.assertNotNull(envelopeSummary.getEnvelopeId());
    
                System.out.println("EnvelopeSummary: " + envelopeSummary);
    
                String returnUrl = "http://localhost:8080/index/";
                RecipientViewRequest recipientView = new RecipientViewRequest();
                recipientView.setReturnUrl(returnUrl);
                recipientView.setClientUserId(clientUserId);
                recipientView.setAuthenticationMethod("email");
                recipientView.setUserName(name);
                recipientView.setEmail(rEmail);
    
                ViewUrl viewUrl = envelopesApi.createRecipientView(AccountId, 
             envelopeSummary.getEnvelopeId(), recipientView);
    
                Assert.assertNotNull(viewUrl);
                Assert.assertNotNull(viewUrl.getUrl());
                // This Url should work in an Iframe or browser to allow signing
                System.out.println("ViewUrl is " + viewUrl);
    
            } catch (ApiException ex) {
                Assert.fail("Exception: " + ex);
            } catch (Exception e) {
                Assert.fail("Exception: " + e.getLocalizedMessage());
            }
    
        }
    }

I (pretty sure ) think it has something to do with the file not being uplaoded properly ( null). Please help !

Answer 1

The error is telling you that the class org.junit.Assert is not on the classpath. Meaning that the JUnit library is missing or it has the wrong scope (if you are using a building tool like Maven or Gradle).

The whole class has several problems, I suspect you are trying to deploy the servlet on Tomcat and there the JUnit dependency is missing. You should redesign it and keep the test separated from the servlet.