I have 2 records in mySql database and I am not able to retrieve 2 values from a column called origin. I am only able to retrieve the value in the first row but not the second. my code is in a method below:
public String[] sequences(){
String[] origins=new String[2];
Connection con = null;
Statement st = null;
ResultSet rs = null;
String url = "jdbc:mysql://localhost:3306/geneBank";
String user = "technoGangster";
String password = "configurationn";
try {
con = DriverManager.getConnection(url, user, password);
st = con.createStatement();
String query=null;
query ="SELECT Origin from T1DAlleles";
rs = st.executeQuery(query);
int rowCount=0;
if (rs.next()) {
origins[rowCount]=rs.getString("Origin");
rowCount++;
}
} catch (SQLException ex) {
Logger lgr = Logger.getLogger(Version.class.getName());
lgr.log(Level.SEVERE, ex.getMessage(), ex);
} finally {
try {
if (rs != null) {
rs.close();
}
if (st != null) {
st.close();
}
if (con != null) {
con.close();
}
} catch (SQLException ex) {
Logger lgr = Logger.getLogger(Version.class.getName());
lgr.log(Level.WARNING, ex.getMessage(), ex);
}
}
int i=0;
for(i=0;i<origins.length;i++){
JOptionPane.showMessageDialog(null,origins[i]);
}
return origins;
}
代替if,您应该使用while循环,如下所示:
while (rs.next()) {
If you only need the values of this column, change the condition 'if' for the loop 'while'
eg
while (rs.next()) {
origins[rowCount]=rs.getString("Origin");
rowCount++;
}
}
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