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我是Java Web Development的新手。開始學習MVC。我面臨的問題是數據不能保存在數據庫中。 我沒有得到任何異常。 RequestDispatcher只顯示我已包含的頁面。數據不會在數據庫中使用java類和bean插入
對不起，如果我沒有把這個問題寫在類別。
代碼是在這裏
控制器代碼：
package manipulationStudentData;
import java.text.SimpleDateFormat;
import java.util.*;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(description = "Insertion Of Data", urlPatterns = { "/InsertionOfData" })
public class InsertionController extends HttpServlet {
private static final long serialVersionUID = 1L;
public InsertionController() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
ManipulateStudentBean insertStudentData=new ManipulateStudentBean();
DatabaseActivityDao database=new DatabaseActivityDao();
String date=""+request.getParameter("day")+"-"+request.getParameter("month")+"-
"+request.getParameter("year");
Date dob=null;
try{
dob=new SimpleDateFormat("dd-MM-yyyy").parse(date);
}catch(Exception e){
e.printStackTrace();
}
insertStudentData.setFirstName(request.getParameter("firstName"));
insertStudentData.setLastName(request.getParameter("lastName"));
insertStudentData.setFatherName(request.getParameter("fatherName"));
insertStudentData.setGender(request.getParameter("gender"));
insertStudentData.setDob(dob);
insertStudentData.setClassNo(request.getParameter("classNo"));
insertStudentData.setAddress(request.getParameter("address"));
database.InsertData(insertStudentData);
request.getRequestDispatcher("/ManipulationPage.jsp").include(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
doGet(request,response);
}
}
BeanClass：
package manipulationStudentData;
import java.util.Date;
public class ManipulateStudentBean {
int studentId;
String firstName="";
String lastName="";
String fatherName="";
String gender="";
Date dob;
String classNo="";
String address="";
public int getStudentId() {
return studentId;
}
public void setStudentId(int studentId) {
this.studentId = studentId;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getFatherName() {
return fatherName;
}
public void setFatherName(String fatherName) {
this.fatherName = fatherName;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public Date getDob() {
return dob;
}
public void setDob(Date dob) {
this.dob = dob;
}
public String getClassNo() {
return classNo;
}
public void setClassNo(String classNo) {
this.classNo = classNo;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
插入到數據庫的代碼只需添加方法在這裏：
public void InsertData(ManipulateStudentBean studentdata){
String query="INSERT INTO students
(FirstName,LastName,FatherName,Gender,DateOfBirth,Class,Address) VALUES "
+ "('" + studentdata.getFirstName() +" ' ' "+ studentdata.getLastName() +" ' '"+
studentdata.getFatherName() +" ' '" + studentdata.getGender() +" ' '"+
studentdata.getDob() +" ' '" + studentdata.getClassNo()
+ " ' '" + studentdata.getAddress() + " ' '" ;
try{
connection=DatabaseConnection.getConnection();
stment=connection.createStatement();
stment.executeQuery(query);
}catch(Exception e){
e.printStackTrace();
}
finally{
/*Closing Statement*/
try{
if(stment !=null){
stment.close();
}
}catch(Exception e){
e.printStackTrace();
}
/*Closing Connection*/
try{
if(connection !=null){
connection.close();
}
}catch(Exception e){
e.printStackTrace();
}
}
}
相同的查詢工作我有不使用MVC模型進行檢查。
你得到任何異常？ – Chaitanya 2014-09-04 15:48:56
當我檢查數據庫數據沒有插入時，沒有ManipulationPage.jsp出現 – 2014-09-04 15:50:18
您是否使用JDBC驅動程序創建到數據庫的連接？ – reporter 2014-09-04 15:51:28