Question

I have two arraylists to insert into 2 columns in a database table as follows:

arraylist1: 123444, 324555, 6423643, 532326
arraylist2: jkfdsl, nkjfsdlj, jdslkfjdlkj, jfsldjfsk, fjdlskjfs

I wrote the following code to insert the arraylists but it is not working. I will appreciate your help.

try {
// Prepare a statement to insert a record

String sql = "INSERT INTO soundsdata.splog (arraylist1, arraylist2) VALUES(?,?)";
pstmt = (PreparedStatement) con.prepareStatement(sql);

pstmt.setArray(1,sptospring);
pstmt.setString(2,eachList.toString());

// Insert the row
pstmt.executeUpdate();
}finally {
pstmt.close();
}

Answer 1

Here’s something that you can do:

Assuming that you’re trying to create one row, where the 1st column will contain the content of the first ArrayList in comma-separated format and the 2nd column will contain the content of the secondArrayList

StringBuilder buffer = new StringBuilder();
boolean processedFirst = false;
String firstParam = null, secondParam = null;

try{
    for(String record: arrayList1){
        if(processedFirst)
            buffer.append(",");
        buffer.append(record);
        processedFirst = true;
    }
    firstParam = buffer.toString();
}finally{
    buffer = null;
}
processedFirst = false;
buffer = new StringBuilder();
try{
    for(String record: arrayList2){
        if(processedFirst)
            buffer.append(",");
        buffer.append(record);
        processedFirst = true;
    }
    secondParam = buffer.toString();
}finally{
    buffer = null;
}
secondParam = buffer.toString();

String sql = "INSERT INTO soundsdata.splog (arraylist1, arraylist2) VALUES(?,?)";
try{
    psmt = (PreparedStatement) con.prepareStatement(sql);
    pstmt.setString(1,firstParam);
    pstmt.setString(2,secondParam);
    pstmt.executeUpdate();
}finally {
    pstmt.close();
}