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嗨，我有如下的代碼。解析json文件時出現問題
public class offlineAgent {
public static void main(String[] args) throws ParseException {
try {
String filename = "E://agent.xls";
HSSFWorkbook hwb = new HSSFWorkbook();
HSSFSheet sheet = hwb.createSheet("Ubuild_agents");
HSSFRow rowhead = sheet.createRow((short) 0);
rowhead.createCell((short) 0).setCellValue("Agent_name");
rowhead.createCell((short) 1).setCellValue("Agent_status");
// Sets the authenticator that will be used by the networking code
// when a proxy or an HTTP server asks for authentication.
Authenticator.setDefault(new CustomAuthenticator());
URL url = new URL(
"http://test:8080/rest2/agents");
// read text returned by server
BufferedReader in = new BufferedReader(new InputStreamReader(url
.openStream()));
String line;
while ((line = in.readLine()) != null) {
FileOutputStream fop = null;
File file;
file = new File("E:/Test/Results.json");
fop = new FileOutputStream(file);
byte[] contentInBytes = line.getBytes();
fop.write(contentInBytes);
fop.flush();
fop.close();
}
in.close();
String filePath = "E:/Test/Results.json";
FileReader reader = new FileReader(filePath);
System.out.println("The unavailability of Ubuild agents");
JSONParser jsonParser = new JSONParser();
Object object = jsonParser.parse(reader);
//JSONObject jsonObject = (JSONObject) jsonParser.parse(reader);
//JSONObject structure = (JSONObject) jsonParser.get("response");
// Object[] result=(Object[]) structure.get("results");
//JSONArray lang = (JSONArray) structure.get("results");
JSONArray lang=new JSONArray();
lang.add(object);
System.out.println("Objects"+object);
System.out.println(lang.size());
for (int i = 0; i < lang.size(); i++) {
// System.out.println("The " + i +
// " element of the array: "+lang.get(i));
}
Iterator i = lang.iterator();
int j = 1;
while (i.hasNext()) {
JSONObject innerObj = (JSONObject) i.next();
System.out.println("i has some data");
System.out.println("innerobj" +innerObj);
if (innerObj.get("status").equals("Offline")) {
// System.out.println(innerObj.get("name"));
// System.out.println(innerObj.get("status"));
HSSFRow row = sheet.createRow((short) j);
row.createCell((short) 0).setCellValue(
innerObj.get("name").toString());
sheet.autoSizeColumn(0);
row.createCell((short) 1).setCellValue(
innerObj.get("status").toString());
sheet.autoSizeColumn(1);
j++;
}
}
FileOutputStream fileOut = new FileOutputStream(filename);
hwb.write(fileOut);
fileOut.close();
// Udeployagent10 crf= new Udeployagent10();
try {
if (j != 1) {
Access_password_correct1 mail = new Access_password_correct1();
mail.mail1();
} else {
System.out.println("all agents are online");
}
} catch (AddressException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
public void mail1() throws AddressException, MessagingException {
String host = "mail.gmail.com";
String from = "[email protected]";
String to = "[email protected]";
String fileAttachment = "E://Ubuild_agent.xls";
Properties props;
MimeMessage message;
Session session;
StringBuffer msg = new StringBuffer();
String msg1 = "Please find the agent details below";
String msgBody;
/*
* read file
*/
try {
InputStream input = new BufferedInputStream(new FileInputStream(
"E://Ubuild_agent.xls"));
POIFSFileSystem fs = new POIFSFileSystem(input);
HSSFWorkbook wb = new HSSFWorkbook(fs);
HSSFSheet sheet = wb.getSheetAt(0);
// int firstRow=sheet.getFirstRowNum();
// int lastRow=sheet.getLastRowNum();
msg.append("Hello Team,\n \n");
msg
.append("The unavailability of the agent(s) will impact that are scheduled to run on the agent.");
Iterator rows = sheet.rowIterator();
while (rows.hasNext()) {
HSSFRow row = (HSSFRow) rows.next();
if (row.getRowNum() > 0) {
msg.append("\n");
Iterator cells = row.cellIterator();
while (cells.hasNext()) {
// msg.append(' ');
msg.append("\t");
msg.append("\n");
HSSFCell cell = (HSSFCell) cells.next();
if (HSSFCell.CELL_TYPE_NUMERIC == cell.getCellType())
msg.append(cell.getNumericCellValue());
else if (HSSFCell.CELL_TYPE_STRING == cell
.getCellType())
msg.append(cell.getStringCellValue());
else if (HSSFCell.CELL_TYPE_BOOLEAN == cell
.getCellType())
cell.getBooleanCellValue();
}
}
}
msg.append("\n \n \n Thanks,\n Team");
} catch (IOException ex) {
ex.printStackTrace();
}
// msg.append("</body></html>");
msgBody = msg.toString();
// Get system properties
props = System.getProperties();
// Setup mail server
props.put("mail.smtp.host", host);
// Get session
session = Session.getInstance(props, null);
message = new MimeMessage(session);
// Define message
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
// message.addRecipient(Message.RecipientType.TO, new
// InternetAddress.parse("[email protected],abc"));
message.addRecipients(Message.RecipientType.CC, InternetAddress
.parse("[email protected]"));
message
.setSubject("Alert: One or more agent(s) detected to be offline");
// message.setText(msg1);
// create the message part
// message.setContent(o, type);
MimeBodyPart messageBodyPart = new MimeBodyPart();
MimeBodyPart messageBodyPart1 = new MimeBodyPart();
// fill message
messageBodyPart.setText(msgBody);
// messageBodyPart.getFileName();
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);
// multipart.addBodyPart(msg1);
// Part two is attachment
messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(fileAttachment);
messageBodyPart.setDataHandler(new DataHandler(source));
StringBuffer st = new StringBuffer(fileAttachment);
System.out.println(st.replace(0, 2, ""));
String s1 = st.toString();
messageBodyPart.setFileName(s1);
multipart.addBodyPart(messageBodyPart);
// Put parts in message
message.setContent(multipart);
// Send the message
Transport.send(message);
System.out.println("mail sent successfully");
}
public static class CustomAuthenticator extends Authenticator {
// Called when password authorization is needed
protected PasswordAuthentication getPasswordAuthentication() {
// Get information about the request
String prompt = getRequestingPrompt();
String hostname = getRequestingHost();
InetAddress ipaddr = getRequestingSite();
int port = getRequestingPort();
String username = "admin";
String password = "admin";
// Return the information (a data holder that is used by
// Authenticator)
return new PasswordAuthentication(username, password.toCharArray());
}
}
}
我在執行代碼時遇到了問題。
異常在線程 「主要」 java.lang.ClassCastException： org.json.simple.JSONArray不能在offlineAgent.main被強制轉換爲org.json.simple.JSONObject （offlineAgent.java:115）
任何人有關於這個問題的想法？
下面是JSON文件
[{ 「ID」：21， 「名」： 「SV-HSCBUILD-P2」， 「說明」：空， 「主機」：空， 「狀態」：」離線 「 」版本「： 」N/A「， 」吞吐量「：1， 」activeJobs「：0 」maxJobs「：5 」忽略「：假， 」被配置「：真 」LASTONLINE「：1434135548313」 lastOnlineString「：」6/12/15 2:59 PM「}，{」id「：11，」name「：」svl-jbuild-d1-t1「，」description「：」svl-jbuild-d1-t1「 「主機」：空， 「狀態」： 「在線」， 「版本」： 「5.0.0-432508」， 「吞吐量」：1， 「activeJobs」：0， 「maxJobs」：5， 「忽略」：假的，「configured」：true，「lastOnline」：1455402039280，「lastOnlineString」：「2/13/16 5:20 PM」}，{「id」：201，「name」：「T1BuildAgent」，「description」：null 「主機」：空， 「狀態」： 「在線」， 「版本」： 「6.1.0-637672」， 「吞吐量」：1， 「activeJobs」：1， 「maxJobs」：5， 「忽略」：假的， 「被配置」：真 「LASTONLINE」：1455402099897 「lastOnlineString」： 「2/13/16 5:21 PM」}，{「id」：65，「name」：「Tibco-SVTIBBUILD」，「description」：null，「host」：null，「status」：「Online」 「版本」： 「5.0.0-432508」， 「吞吐量」：1， 「activeJobs」：0 「maxJobs」：5 「忽略」：假， 「被配置」：真 「LASTONLINE」：1455402542020「lastOnlineString 「：」2/13/16 5:29 PM「}，{」id「：192，」name「：」Tibco_t1「，」description「：null，」host「：null，」status「：」Online「 「版本」： 「6.1.0-637672」， 「吞吐量」：1， 「maxJobs」：5 「忽略」：假， 「被配置」：假 「LASTONLINE」：1455402561953 「lastOnlineString」：「2/13/16日下午5:29「}]
是不是異常消息解釋不夠？ – fge
您能提供導致問題的行號代碼上下文嗎？由於代碼格式不正確，很難知道哪些行/行導致錯誤。 –
我想你正嘗試以不同的方式閱讀它，而不是使用JSONObject，而是嘗試在JSONArray中讀取它。看看如何讀寫java。[參考]（http://www.mkyong.com/java/json-simple-example-read-and-write-json/） – gks