JSONArray hosted on localhost:8080/StudentAdmin/sqlTest

sqlJSONArray.java

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+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.*;
+
+import javax.naming.Context;
+import javax.naming.InitialContext;
+import javax.naming.NamingException;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.sql.DataSource;
+
+@WebServlet("/Test")
+public class sqlTest extends HttpServlet {
+	private static final long serialVersionUID = 1L;
+
+	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+		Context ctx = null;
+		Connection con = null;
+		Statement stmt = null;
+		ResultSet rs = null;
+		try{
+			ctx = new InitialContext();
+			DataSource ds = (DataSource) ctx.lookup("java:/comp/env/jdbc/LocalStudentAdminDB");
+			con = ds.getConnection();
+			stmt = con.createStatement();
+			rs = stmt.executeQuery("SELECT * FROM SA_Development.TERM");
+			PrintWriter out = response.getWriter();
+
+			String resultantJSON = "[";
+			ResultSetMetaData rsmd = rs.getMetaData();
+			int columnCount = rsmd.getColumnCount();				
+			int x = 0;
+
+			while(rs.next()){
+				if (x!=0) {resultantJSON += ",";}
+				resultantJSON += "\"" + rs.getString("TERM_NAME") + "\"";
+				x += 1;
+			}
+			resultantJSON += "]";
+			response.setContentType("application/json");
+			out.print(resultantJSON);
+		}catch(NamingException e){
+			e.printStackTrace();
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}finally{
+			try {
+				rs.close();
+				stmt.close();
+				con.close();
+				ctx.close();
+			} catch (SQLException e) {
+				System.out.println("Exception in closing DB resources");
+			} catch (NamingException e) {
+				System.out.println("Exception in closing Context");
+			}
+
+		}
+	}
+
+}