Too many connections!what can i do?help :)

Question

Hello,everyone!
I am a programmer in China,I like java,During working I met a question,please give me some indicate!
//the main program
public void actionPerformed(ActionEvent e){
mysqldatabean mysqldata=new mysqldatabean();
String sql1="select*from talbe1";
ResultSet rs1=mysqldata.mysqlexecuteQuery(sql1);
try{
while(rs1.next()){
String id=rs1.getString("id");
String sql2="select*from table2 where id='"+id+"'";
ResultSet rs2=mysqldata.mysqlexecuteQuery(sql2);
try{
while(){
catch(SQLException ex){}
mysqldata.destroyconnection();
catch(Exception ex){}
mysqldata.destroyconnection();
//the class
class mysqldatabean {
String mysqlDBDriver = "sun.jdbc.odbc.JdbcOdbcDriver";
String mysqlConnStr = "jdbc:odbc:mysqldata";
Connection mysqlconn = null;
ResultSet mysqlrs = null;
Statement mysqlstmt=null;
public mysqldatabean() {
try {
Class.forName(mysqlDBDriver);
catch(java.lang.ClassNotFoundException e) {
System.err.println("mysqlexecuteQuery: " + e.getMessage());
public ResultSet mysqlexecuteQuery(String mysqlsql) {
try {
mysqlconn = DriverManager.getConnection(mysqlConnStr);
mysqlstmt = mysqlconn.createStatement();
mysqlrs = mysqlstmt.executeQuery(mysqlsql);
catch(SQLException ex) {
System.err.println("mysqlexecuteQuery: " + ex.getMessage());
return mysqlrs;
public void destroyconnection(){
boolean connboolean=false;
try{
mysqlconn.close();
connboolean=mysqlconn.isClosed();
catch(SQLException ex){}
Question:
because of large number of datas,while execute,Exception:mysql server, odbcdriver too many connections, getSQLState:s1000
how can i change this program?please give me the anwser(code),I need it immediately!
Help!!:)
[email protected]

Answer 1

// You are trying to establish connection for all statements.
// You only need connection per database connection not per statement.
// Try to create connection outside of mysqlexecuteQuery()
mysqldatabean mysqldata=new mysqldatabean();
String sql1="select*from talbe1";
mysqlconn = DriverManager.getConnection(mysqlConnStr);
ResultSet rs1=mysqldata.mysqlexecuteQuery(sql1);
public ResultSet mysqlexecuteQuery(String mysqlsql) {
try {
mysqlstmt = mysqlconn.createStatement();
mysqlrs = mysqlstmt.executeQuery(mysqlsql);
catch(SQLException ex) {
System.err.println("mysqlexecuteQuery: " + ex.getMessage());
return mysqlrs;