【发布时间】:2022-01-04 04:21:29
【问题描述】:
想要在 JSP 页面中显示以下数据模式。 {record.id} 显示没有任何人可以帮助解决此问题。数据是从 servlet 的 mysql 数据库中获取并传递给 JSP。
JSP 代码
<table>
<tr>
<c:forEach var="record" items="${STUDENT_LIST}">
<td>${record.id}</td>
<td>${record.sfirstName}</td>
<td>${record.sgender}</td>
</c:forEach>
</tr>
</table>
数据格式
[getStudentDetails[id=1, sfirstName=Tom, sgender=M],
[getStudentDetails[id=2,sfirstName=jerry, sgender=M],
[getStudentDetails[id=3, sfirstName=scooby, sgender=M]]
Servlet 代码
学生 = studentDetailsDB.getStudents();
request.setAttribute("STUDENT_LIST", students);
request.getRequestDispatcher("studentDetailsView.jsp").forward(request, response);
学生班 公共类 getStudentDetails {
private int id;
private String sfirstName;
private String sgender;
public getStudentDetails(int id, String sfirstName, String sgender) {
this.id = id;
this.sfirstName = sfirstName;
this.sgender = sgender;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getSfirstName() {
return sfirstName;
}
public void setSfirstName(String sfirstName) {
this.sfirstName = sfirstName;
}
public String getSgender() {
return sgender;
}
public void setSgender(String sgender) {
this.sgender = sgender;
}
@Override
public String toString() {
return "getStudentDetails[" + "id=" + id + ", sfirstName=" + sfirstName + ", sgender=" + sgender + ']';
}
}
DBO 而 (rs.next()) {
// retrieve data from result set row
int id = rs.getInt("studentId");
String sfirstName = rs.getString("sFirstName");
String sgender = rs.getString("gender");
getStudentDetails tstudent = new getStudentDetails(id ,sfirstName,sgender);
student.add(tstudent);
}
【问题讨论】:
-
record.slastName
与sfirstName=scooby
? -
在您的 servlet 中,您是否将此数据添加到您的请求或会话中?
-
学生 = studentDetailsDB.getStudents(); request.setAttribute("STUDENT_LIST", 学生); request.getRequestDispatcher("studentDetailsView.jsp").forward(request, response);
-
你确定
students = studentDetailsDB.getStudents();
不为空吗? -
不,它不是空的 ${STUDENT_LIST} 具有问题中提到的格式的详细信息。当我执行 foreach 循环并尝试使用问题中提到的 {record.id} 获取数据时,我没有得到任何输出