Question

我在尝试启动网络服务时收到此错误消息：org.apache.jasper.JasperException: javax.el.PropertyNotFoundException: Property 'jobId' not found on type com.bridge.service.Service

奇怪的是，jobId在服务和我的数据库中定义它将从中提取数据。

以下是应该访问数据的函数。

public List<Service> getAllData() {

    List<Service> data = new ArrayList<Service>();

    try {
        Class.forName(jdbc_driver);
        // Connect to DB
        Connection conn = DriverManager.getConnection(db_url, USER, PASS);

        Statement statement = conn.createStatement();
        ResultSet rs = statement.executeQuery("SELECT * FROM email_data");
        while (rs.next()) {
            Service serv = new Service();
            //UUID id = null;
            serv.setId(rs.getString("jobId"));  // error here
            serv.setName(rs.getString("jobName"));
            serv.setStatus(rs.getString("jobStatus"));
            serv.setStart(rs.getTimestamp("start"));
            serv.setFinish(rs.getTimestamp("finish"));
            data.add(serv);
        }
        rs.close();
    } catch (SQLException e) {
        e.printStackTrace();
    } catch (Exception e) {
        System.err.println("listing data, ya fucked up boi");
        System.err.println(e.getMessage());
    }

    return data;
}

此外，在我的JSP文件中，它应该抓取数据，它被列为名为jobId的变量，如下所示。

<body>
<table border=1>
    <thead>
        <tr>
            <th>Job ID</th>
            <th>Job Name</th>
            <th>Job Status</th>
            <th>Start Time</th>
            <th>Finish Time</th>
            <th colspan=2>Action</th>
        </tr>
    </thead>
    <tbody>
        <c:forEach items="${jobs}" var="job">
            <tr>
                <td><c:out value="${job.jobId}"/></td>
                <td><c:out value="${job.jobName}"/></td>
                <td><c:out value="${job.jobStatus}"/></td>
                <td><c:out value="${job.start}"/></td>
                <td><c:out value="${job.finish}"/></td>
                <td><a href="ServiceController?action=edit&jobId=<c:out value="${job.jobId}"/>">Update</a></td>
                <td><a href="ServiceController?action=delete&jobId=<c:out value="${job.jobId}"/>">Delete</a></td>
            </tr>
        </c:forEach>
    </tbody>
</table>
<p><a href="ServiceController?action=insert">Add Job</a></p>

有什么想法吗？我在这里不知所措。

编辑：这是Service.java：

public class Service {

private String jobId;
private String jobName;
private String jobStatus;
private Timestamp jobStart;
private Timestamp jobFinish;

public Service() {
    // empty constructor
}

public Service(String id, String n, String s) {
    jobId = id;
    jobName = n;
    jobStatus = s;
}

public String getId() {
    return this.jobId;
}

public String getName() {
    return this.jobName;
}

public String getStatus() {
    return this.jobStatus;
}

public void setId(String id) {
    this.jobId = id;
}

public void setName(String name) {
    this.jobName = name;
}

public void setStatus(String status) {
    this.jobStatus = status;
}

public void setStart(Timestamp time) {
    this.jobStart = time;
}

public void setFinish(Timestamp time) {
    this.jobFinish = time;
}

// SQL Info
static final String jdbc_driver = "com.mysql.jdbc.Driver";
static final String db_url = "jdbc:mysql://localhost:3306/email_data";

// SQL creds
static final String USER = "<redacted>";
static final String PASS = "<redacted>";

public void hygienePost(Service serv) throws Exception {

    NewTask.toRabbit(serv.getId(), serv.getName(), serv.getStatus());
    // System.out.println(serv.getId()+serv.getName()+serv.getStatus());

}

public List<Service> getAllData() {

    List<Service> data = new ArrayList<Service>();

    try {
        Class.forName(jdbc_driver);
        // Connect to DB
        Connection conn = DriverManager.getConnection(db_url, USER, PASS);

        Statement statement = conn.createStatement();
        ResultSet rs = statement.executeQuery("SELECT * FROM email_data");
        while (rs.next()) {
            Service serv = new Service();
            // UUID id = null;
            /*
               serv.setId(rs.getString("jobId"));
               serv.setName(rs.getString("jobName"));
               serv.setStatus(rs.getString("jobStatus"));
               serv.setStart(rs.getTimestamp("start"));
               serv.setFinish(rs.getTimestamp("finish")); data.add(serv);
             */
            ResultSetMetaData rsmd = rs.getMetaData();
            int columnCount = rsmd.getColumnCount();

            // The column count starts from 1
            for (int i = 1; i < columnCount + 1; i++) {
                String name = rsmd.getColumnName(i);
                System.out.println(rs.getString(1));
            }
        }
        rs.close();
    } catch (SQLException e) {
        e.printStackTrace();
    } catch (Exception e) {
        System.err.println("listing data, ya fucked up boi");
        System.err.println(e.getMessage());
    }

    return data;
}

}

Answer 1

它的贾斯珀例外。

serv.setId(rs.getString("jobid"));  // error here

您在服务类中提到了setID。然后属性是id。

所以你需要这样做

<td><c:out value="${job.id}"/></td>

所以你不应该在bean类中有不同的propname和getter setter。应该是一样的。

所以请更改getter和setter。

添加getJobid和setJobid。

Answer 2

您在jobid方法中使用小写i撰写getAllData()，但使用大写I进行宣传。

正如我从您发布的代码中看到的那样，jobId的getter方法是setID()。因此我的猜测是你的财产被称为id而不是jobId。确保您的Service类看起来像这样：

public class Service {
private String jobId;

    public void setJobId(String jobId) {
        this.jobId = jobId;
    }

    public String getJobId() {
        return this.jobId;
    }
}

@Siva首先发现了这个错误。因此，如果这纠正了您的错误，请考虑投票而不是我。

Answer 3

serv.setId(rs.getString("jobId"));

资本我。

javax.el.PropertyNotFoundException：Property＆＃39; jobId＆＃39;未找到

3 个答案: