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8.0

Passing Connection objects between servlets

Asked by whitej8 in Java Programming Language, Java Servlets

I have a servlet that needs to access the functionality of another servlet. The two servlets, user and annotation, are very similiar each opens a connection to the database during init().

I need to get user information out of the database while processing the annotation. I open the connection in the annotation and then pass it to method contained within the user.cUser class. When I then try to query the database from the user.cUser object I get a java.sql.SQLException: Before start of result set

What's the problem?

From the doGet method of annotation.java
//TO DO test for user_id and oai_id

//get user name
user.SQLParam user_param = new user.MySQLParam();
cUser mUser = new cUser(conn, user_param, Long.parseLong(request.getParameter("user_id")));

session.setAttribute("user_name", mUser.user_name);
session.setAttribute("user_id", mUser.getUserIDString());

The constructor
public cUser(Connection con, SQLParam param, long UserID){
Statement stmt = null;
try {
System.out.println("cUser.getUser " + param.getSelectByIDStatement(UserID));

stmt = con.createStatement();
ResultSet rs=stmt.executeQuery(param.getSelectByIDStatement(UserID));

user_id = UserID;
user_name = rs.getString("user_name");
alias = rs.getString("alias");
user_bio = rs.getString("user_bio");
user_bio_short = rs.getString("user_bio_short");

} catch (SQLException e) {
System.out.println(e);
System.out.println("throwing SQLException from cUser.cUser(Connection con, SQLParam param, int UserID)");
}
}

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Passing Connection objects between servlets

Asked by whitej8 in Java Programming Language, Java Servlets

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