JDBC插入大量数据问题

Question

我用的mysql

public class Main {
public static void main(String[] args) {
int count = 0;
PreparedStatement pstmt =null;
Connection conn = JDBCUtil.getConnection();
String sql = "insert into mobile_place(number,place) values(?,?)";
try {
InputStreamReader is = new InputStreamReader(new FileInputStream(new File("D:/CC.txt")),"utf-8");
BufferedReader br = new BufferedReader(is);
while(br.readLine() != null){
conn.setAutoCommit(false);
count++;
String str = br.readLine().toString().trim();
String s1 = str.substring(0, str.indexOf(","));
String s2 = str.substring(str.indexOf(",")+1,str.length());
pstmt = conn.prepareStatement(sql);
pstmt.setString(1, s1);
pstmt.setString(2, s2);
pstmt.addBatch();
if(count%500 == 0){
pstmt.executeBatch();
conn.commit();
}
System.out.println("已插入"+count+"条数据");
}
pstmt.close();
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

1899952 ,新疆-克拉玛依

1899954 ,新疆-昌吉

1899956 ,新疆-昌吉

1899958 ,新疆-伊犁

1899960 ,新疆-库尔勒

1899962 ,新疆-库尔勒

1899964 ,新疆-喀什

1899966 ,新疆-阿克苏

1899968 ,新疆-哈密

1899970 ,新疆-奎屯

1899972 ,新疆-奎屯

1899974 ,新疆-塔城

1899976 ,新疆-博乐
。。。。。。。。。。。。。。。。。。。。。。。。。。。。
有很多这样格式的数据，读取出来存入数据库，但是数据库中根本就没有插入这么多数据，只有很少的一部分插进去了，这是为什么？

Answer 1

逻辑写的不对

改成

pstmt = conn.prepareStatement(sql);
while(br.readLine() != null){
conn.setAutoCommit(false);
count++;
String str = br.readLine().toString().trim();
String s1 = str.substring(0, str.indexOf(","));
String s2 = str.substring(str.indexOf(",")+1,str.length());
pstmt.setString(1, s1);
pstmt.setString(2, s2);
pstmt.addBatch();
if(count%500 == 0){
pstmt.executeBatch();
conn.commit();
}
System.out.println("已插入"+count+"条数据");
}

if(count%500!=0) {
pstmt.executeBatch();
conn.commit();
}

你之前的逻辑会每次循环创建一个pstmt 这样只有第500个可以插入