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Ich habe ein Java-Projekt mit Apache Olingo, in denen ich Daten aus MySQL-Datenbank zu holen versuchen entwickelt, aber ich bin immer folgende Fehlerjdbc Anschluss für Apache Olingo
erhielt eine Ausnahme! com.mysql.jdbc.Driver
Welche Bibliothek soll in Apache olingo dafür importiert werden? Unten ist mein Java-Klasse
private EntityCollection getData(EdmEntitySet edmEntitySet){
EntityCollection productsCollection = new EntityCollection();
// check for which EdmEntitySet the data is requested
if(DemoEdmProvider.ES_PRODUCTS_NAME.equals(edmEntitySet.getName())) {
List<org.apache.olingo.commons.api.data.Entity> productList = productsCollection.getEntities();
try
{
// create our mysql database connection
//String myDriver = "org.gjt.mm.mysql.Driver";
String myDriver ="com.mysql.jdbc.Driver";
String myUrl = "jdbc:mysql://localhost:3306/testDB";
Class.forName(myDriver);
Connection conn = DriverManager.getConnection(myUrl, "root", "test1234");
// our SQL SELECT query.
// if you only need a few columns, specify them by name instead of using "*"
String query = "SELECT * FROM Employee";
// create the java statement
Statement st = conn.createStatement();
// execute the query, and get a java resultset
ResultSet rs = st.executeQuery(query);
// iterate through the java resultset
while (rs.next())
{
String NAME = rs.getString("NAME");
String CITY = rs.getString("CITY");
int AGE = rs.getInt("AGE");
// print the results
final Entity e1 = new Entity()
.addProperty(new Property(null, "NAME", ValueType.PRIMITIVE, NAME))
.addProperty(new Property(null, "CITY", ValueType.PRIMITIVE, CITY))
.addProperty(new Property(null, "AGE", ValueType.PRIMITIVE,
AGE));
e1.setId(createId("Products", 1));
productList.add(e1);
}
st.close();
}
catch (Exception e)
{
System.err.println("Got an exception! ");
System.err.println(e.getMessage());
}
}