PreparedStatement使用批處理多個更新20.15.2.Use Batch Multiple Updates with PreparedStatement

 

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSetMetaData;
import java.sql.Statement;

import java.sql.ResultSet;


public class BatchMultiplePreparedStatement {

	public static void main(String[] args) throws Exception{
		Connection con = getConnection();
		con.setAutoCommit(false);
		Statement st = con.createStatement();
		st.executeUpdate("create table survey1(id int , name varchar(30));");
		String INSERT_RECORD = "insert into survey1(id,name) values(?,?)";
		
		PreparedStatement psmt = con.prepareStatement(INSERT_RECORD);
		psmt.setString(1, "1");
		psmt.setString(2,"name1");
		psmt.addBatch();
		
		psmt.setString(1, "2");
	    psmt.setString(2, "name2");
	    psmt.addBatch();
	    
	    int[] updateCounts = psmt.executeBatch();
	    checkUpdateCounts(updateCounts);
	    
	    con.commit();
	    ResultSet rs = st.executeQuery("select * from survey1");
	    outputResultSet(rs);
	    rs.close();
	    st.close();
	    con.close();

	}

	private static void outputResultSet(ResultSet rs) throws Exception{
		ResultSetMetaData rsmd = rs.getMetaData();
		int numberOfColumns = rsmd.getColumnCount();
		for(int i = 1; i < numberOfColumns + 1; i++){
			String columnName = rsmd.getColumnName(i);
			System.out.println(columnName + "   ");
		}
		
		System.out.println();
	    System.out.println("----------------------");


	    while(rs.next()){
	    	for(int i = 1; i < numberOfColumns +1 ; i++){
	    		System.out.println(rs.getString(i) + " ");
	    	}
	    	System.out.println();
	    }
		
	}

	private static void checkUpdateCounts(int[] updateCounts) {
		for(int i = 0; i < updateCounts.length; i++){
			if(updateCounts[i] > 0){
				System.out.println("OK; updateCount =" + updateCounts[i]);
			}
			else if(updateCounts[i] == Statement.SUCCESS_NO_INFO){
				System.out.println("OK; updateCount = Statement.SUCCESS_NO_INFO");
			}
			else if(updateCounts[i] == Statement.EXECUTE_FAILED){
				System.out.println("Failure;updateCount = Statement.EXECUTE_FAILED");
			}
		}
		
	}

	public static Connection getConnection() throws Exception{
		Connection con = null;
		Class.forName("com.mysql.jdbc.Driver");
		con = DriverManager.getConnection("jdbc:mysql://localhost/bookshop","root","");
		return con;
	}
}

OK; updateCount =1
OK; updateCount =1
id  
name  

----------------------
1
name1

2
name2