JSP-CodeSpeichern mehrerer Werte/resultset in Java Bean
<form method="get" action="/asq/searchBox">
<select id="searchType" name="searchType">
<option id="username" value="username" >Username</option>
<option id="realName" value="realName">Real name</option>
<option id="emailAddress" value="emailAddress">Email Address</option>
<option id="interest" value="interest">Interest</option>
</select>
<input type="text" name="searchBox" id="searchBox"/>
<br>
<input type="submit" name="submit" value="Submit" />
</form>
Java Bean
public class Friends {
private String userId;
private String firstName;
private String lastName;
private String displayname;
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 getDisplayname() {
return displayname;
}
public void setDisplayname(String displayname) {
this.displayname = displayname;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
}
Servlet-Code
String searchType = request.getParameter("searchType");
String searchText = request.getParameter("searchBox");
Friends searchBean = new Friends();
if(searchType.equals("username") == true){
try {
//SQL Statement
String sql = "SELECT firstName, lastName, userId, displayname FROM azq.registration WHERE azq.registration.displayname LIKE '%" + searchText+ "%'";
// create the java statement
Statement st = conn.createStatement();
// execute the query, and get a java resultset
ResultSet rs = st.executeQuery(sql);
// iterate through the java resultset
while (rs.next())
{
searchBean.setFirstName(rs.getString("firstName"));
searchBean.setLastName(rs.getString("lastName"));
searchBean.setUserId(rs.getString("userId"));
searchBean.setDisplayname(rs.getString("displayname"));
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
else if(searchType.equals("realName")== true){
try {
//SQL Statement
String sql = "SELECT firstName, lastName, userId, displayname FROM azq.registration WHERE azq.registration.firstName LIKE '%" + searchText+ "%' OR azq.registration.lastName LIKE '%" + searchText+ "%'";
// create the java statement
Statement st = conn.createStatement();
// execute the query, and get a java resultset
ResultSet rs = st.executeQuery(sql);
// iterate through the java resultset
while (rs.next())
{
searchBean.setFirstName(rs.getString("firstName"));
searchBean.setLastName(rs.getString("lastName"));
searchBean.setUserId(rs.getString("userId"));
searchBean.setDisplayname(rs.getString("displayname"));
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
else if(searchType.equals("emailAddress")== true){
try {
//SQL Statement
String sql = "SELECT firstName, lastName, userId, displayname FROM azq.registration WHERE azq.registration.emailAddress LIKE '%" + searchText+ "%'";
// create the java statement
Statement st = conn.createStatement();
// execute the query, and get a java resultset
ResultSet rs = st.executeQuery(sql);
// iterate through the java resultset
while (rs.next())
{
searchBean.setFirstName(rs.getString("firstName"));
searchBean.setLastName(rs.getString("lastName"));
searchBean.setUserId(rs.getString("userId"));
searchBean.setDisplayname(rs.getString("displayname"));
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
else if(searchType.equals("interest")== true){
try {
//SQL Statement
String sql = "SELECT firstName, lastName, userId, displayname FROM azq.registration WHERE azq.registration.interest LIKE '%" + searchText+ "%'";
// create the java statement
Statement st = conn.createStatement();
// execute the query, and get a java resultset
ResultSet rs = st.executeQuery(sql);
// iterate through the java resultset
while (rs.next())
{
searchBean.setFirstName(rs.getString("firstName"));
searchBean.setLastName(rs.getString("lastName"));
searchBean.setUserId(rs.getString("userId"));
searchBean.setDisplayname(rs.getString("displayname"));
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
request.getSession(true).setAttribute("searchBean", searchBean);
request.getRequestDispatcher("resultPage.jsp").forward(request, response);
}
Abrufen Code
<jsp:useBean id="searchBean" class="sg.edu.nyp.sit.bean.Friends" scope="session"/>
<html>
<head>
<title>resultPage</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body>
<jsp:getProperty name="searchBean" property="firstName" />
<jsp:getProperty name="searchBean" property="lastName" />
<br>
<jsp:getProperty name="searchBean" property="displayname" />
</body>
</html>
Ich erlaube meinem Benutzer einzustellen, was sie suchen wollen (z.B. Benutzername, E-Mail usw.) und geben Sie ihre Eingabe ein. Nach dem Drücken der Submit-Taste werden sie auf eine andere Seite umgeleitet und die Seite zeigt an, was sie gesucht hat. Das Problem, mit dem ich derzeit konfrontiert bin, ist jedoch, wie ich ein Resultset/mehrere Werte in einer Java-Bean speichern und auf einer anderen JSP-Seite anzeigen kann.
Gibt es eine andere Lösung, die eine JSTL-Funktion verwendet?
Mögliches Duplikat [Wie eine Sammlung in einer jsp zeigen, Seite] (http://stackoverflow.com/questions/5241125/how-to-show-a-collection-in-a-jsp-page) –