<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>jTable</display-name>
<servlet>
<servlet-name>DateController</servlet-name>
<servlet-class>com.servlet.DateController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>InfoController</servlet-name>
<url-pattern>/InfoController</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>DateController</servlet-name>
<url-pattern>/DateController</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>schedule.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>Controller</servlet-name>
<servlet-class>com.servlet.Controller</servlet-class>
</servlet>
<servlet>
<servlet-name>InfoController</servlet-name>
<servlet-class>com.servlet.InfoController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Controller</servlet-name>
<url-pattern>/Controller</url-pattern>
</servlet-mapping>
</web-app>
我的jtable（jquery）显示“没有数据可用”。实际上我的表包含数据。我不知道我做错了什么 请参阅下面的代码
模型类
public class ScheduleDate {
String sapCode;
String projectName;
String country;
public String getSapCode() {
return sapCode;
}
public void setSapCode(String sapCode) {
this.sapCode = sapCode;
}
public String getProjectName() {
return projectName;
}
public void setProjectName(String projectName) {
this.projectName = projectName;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
}
DAO课程：
public class DateDao {
private Connection dbConnection;
private PreparedStatement pStmt;
public DateDao (){
dbConnection = DBUtility.getConnection();
}
public void addSchedule(ScheduleDate sch) {
String insertQuery = "INSERT INTO scheduledate(sap_code,project_long_name,country) VALUES (?,?,?)";
try {
pStmt = dbConnection.prepareStatement(insertQuery);
pStmt.setString(1, sch.getSapCode());
pStmt.setString(2, sch.getProjectName());
pStmt.executeUpdate();
} catch (SQLException e) {
System.err.println(e.getMessage());
}
}
public void deleteDate(String sapcode) {
String deleteQuery = "DELETE FROM scheduledate WHERE sap_code = ?";
try {
pStmt = dbConnection.prepareStatement(deleteQuery);
pStmt.setString(1, sapcode);
pStmt.executeUpdate();
} catch (SQLException e) {
System.err.println(e.getMessage());
}
}
public void updateDate(ScheduleDate sch) {
String updateQuery = "update scheduledate set project_long_name=?,country=? where sap_code=?";
try{
pStmt = dbConnection.prepareStatement(updateQuery);
pStmt.setString(1, sch.getProjectName());
pStmt.setString(2, sch.getCountry());
pStmt.setString(3, sch.getSapCode());
pStmt.executeUpdate();
}
catch (SQLException e) {
System.err.println(e.getMessage());
}
}
public List<ScheduleDate> getAllDate() {
List<ScheduleDate> in = new ArrayList<ScheduleDate>();
String query = "select sap_code,project_long_name,country from scheduledate";
try {
Statement stmt = dbConnection.createStatement();
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
ScheduleDate i = new ScheduleDate();
i.setSapCode(rs.getString(1));
i.setProjectName(rs.getString(2));
i.setCountry(rs.getString(3));
in.add(i);
}
} catch (SQLException e) {
System.err.println(e.getMessage());
}
return in;
}
}
我的servlet控制器
public class DateController extends HttpServlet {
private static final long serialVersionUID = 1L;
private HashMap<String, Object> JSONROOT = new HashMap<String, Object>();
private DateDao dao ;
public DateController(){
dao = new DateDao();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String action = request.getParameter("action");
List<ScheduleDate> scheduleList = new ArrayList<ScheduleDate>();
Gson gson = new GsonBuilder().setPrettyPrinting().create();
response.setContentType("application/json");
if (action != null) {
try {
if (action.equals("list")) {
// Fetch Data from Student Table
scheduleList= dao.getAllDate();
// Return in the format required by jTable plugin
JSONROOT.put("Result", "OK");
JSONROOT.put("Records",scheduleList);
// Convert Java Object to Json
String jsonArray = gson.toJson(JSONROOT);
response.getWriter().print(jsonArray);
} else if (action.equals("create") || action.equals("update")) {
ScheduleDate sch = new ScheduleDate();
if (request.getParameter("sapCode") != null) {
String sapCode = request.getParameter("sapCode");
sch.setSapCode(sapCode);
}
if (request.getParameter("projectName") != null) {
String projectName = request.getParameter("projectName");
sch.setProjectName(projectName);
}
if (request.getParameter("country")!= null) {
String country = request.getParameter("country");
sch.setCountry(country);
}
if (action.equals("create")) {
// Create new record
dao.addSchedule(sch);
} else if (action.equals("update")) {
// Update existing record
dao.updateDate(sch);
}
// Return in the format required by jTable plugin
JSONROOT.put("Result", "OK");
JSONROOT.put("Record", sch);
// Convert Java Object to Json
String jsonArray = gson.toJson(JSONROOT);
response.getWriter().print(jsonArray);
} else if (action.equals("delete")) {
// Delete record
if (request.getParameter("sapCode") != null) {
String sapCode = request.getParameter("sapCode");
dao.deleteDate(sapCode);
// Return in the format required by jTable plugin
JSONROOT.put("Result", "OK");
// Convert Java Object to Json
String jsonArray = gson.toJson(JSONROOT);
response.getWriter().print(jsonArray);
}
}
} catch (Exception ex) {
JSONROOT.put("Result", "ERROR");
JSONROOT.put("Message", ex.getMessage());
String error = gson.toJson(JSONROOT);
response.getWriter().print(error);
}
}
}
}
我的jsp文件（由javasscript和html组成）。
<script type="text/javascript">
$(function() {
$( "#tabs" ).tabs();
});
$(document).ready(function(){
$('#StudentTableContainer').jtable()({
title : 'Schedule Date',
// paging: true, //Enable paging
//pageSize: 10, //Set page size (default: 10)
//sorting: true, //Enable sorting
//defaultSorting: 'Name ASC',
actions : {
listAction : 'DateController?action=list',
createAction : 'DateController?action=create',
updateAction : 'DateController?action=update',
deleteAction : 'DateController?action=delete'
},
fields : {
sapCode: {
title : 'Sap Code',
width : '40%',
key : true,
list : true,
edit : false,
create : true
},
projectName : {
title : 'Name',
width : '50%',
edit : true
},
country : {
title : 'Country',
width : '20%',
edit : true
}
}
});
$('#StudentTableContainer').jtable('load');
});
</script>
</head> <body>
<div style="width: 100%; margin-right: 0%; margin-left: 0%; text-align: center;">
<h4>General Information</h4>
<div id="StudentTableContainer"></div>
</div>
</body>