java - H2:executeBatch 不起作用

Question

我有以下代码

String query = "INSERT INTO student (age,name) VALUES (?,?)";
conn.setAutoCommit(true);  
ps = conn.prepareStatement(query);            
for (Student student:list) {
     ps.setInt(1, student.getAge());
     ps.setString(2, student.getName());
}
int[]temp=ps.executeBatch();
System.out.println("TEMP:"+temp.length);//returns 0

执行的代码。没有错误没有异常(exception)。但是学生表是空的。我在嵌入式模式下使用 h2 1.3.176。怎么了？

Answer 1

您忘记添加批量参数集:

String query = "INSERT INTO student (age,name) VALUES (?,?)";
conn.setAutoCommit(true);  
ps = conn.prepareStatement(query);            
for (Student student:list) {
    ps.setInt(1, student.getAge());
    ps.setString(2, student.getName());
    ps.addBatch(); // <--
}
int[]temp=ps.executeBatch();
System.out.println("TEMP:"+temp.length);