java批量更新小记录

1.  public void addEmployees(Connection conn, List<Employee> empList, int batchSize)  
2.             throws SQLException {  
3.         long bt = System.currentTimeMillis();  
4.         PreparedStatement stmt = null;  
5.         try {  
6.             String sql = SqlParser.getInstance().getSql("Employee.insert");  
7.             stmt = conn.prepareStatement(sql);  
8.             int count = 0;  
9.             for (Employee emp : empList) {  
10.                 stmt.setInt(1, emp.getId());  
11.                 stmt.setString(2, emp.getName());  
12.                 stmt.setInt(3, emp.getDepartment().getId());  
13.                 stmt.setString(4, emp.getDescription());  
14.                 stmt.addBatch();  
15.                   
16.                 count++;                  
17.                 if (count % batchSize == 0) {  
18.                     stmt.executeBatch();  
19.                 }  
20.             }  
21.               
22.             stmt.executeBatch();  
23.   
24.         } finally {  
25.             long et = System.currentTimeMillis();  
26.             System.out.println(String.format("用时%dms", et-bt));  
27.             DBUtil.close(stmt);  
28.             DBUtil.close(conn);  
29.         }  
30.     }  
31.