passing java string variable in mysql query

Question

How to pass java string variable in sql query .I have done all the JDBC connection .

My sql database query is

sql = \"Select * 
       from productio         


        

Answer 1

Passing variable is quiet simple in mysql query using java.

• Write your query
• and write the variable in ""
• In my case i am passing 'conition' and 'tablename' dynamically.

• Thank you very much have a good day.

  @Override public LinkedList getNameList(String condition, String tableName, String projectName) { // TODO Auto-generated method stub

  String query = "select distinct("+condition+") as name  from "+tableName+" ";
  
  //System.out.println(query);
  
  ResultSet rs = null;
  PreparedStatement preparedStatement = null;
  Connection connection = null;
  
  LinkedList finalList = new LinkedList();
  try{
      connection = dataSourceAbacus.getConnection();
      preparedStatement = connection.prepareStatement(query);
      rs= preparedStatement.executeQuery();
      while(rs.next()){
  
          finalList.add(rs.getString("name"));
      }
  }catch(Exception e){
      e.printStackTrace();
  }finally{
      if(connection !=null){
          try {
              connection.close();
          } catch (SQLException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          }
      }
      if(preparedStatement != null){
          try{
              preparedStatement.close();
          }catch(Exception e){
              e.printStackTrace();
          }
      }
      if(rs != null){
          try{
              rs.close();
          }catch(Exception e){
              e.printStackTrace();
          }
      }
  }
  
  return finalList;
  

  }