将arraylist写入数据库java

Question

我有两个arraylists插入数据库表中的2列,如下所示:

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

我编写了以下代码来插入arraylists,但它不起作用.我将感谢你的帮助.

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

这是你可以做的事情:

假设您正在尝试创建一行,其中1st column将以ArrayList逗号分隔格式包含第一行的内容,而第二column行将包含第二行的内容ArrayList

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();
}