标签:integer xmla turn 数据库 lap .class java etc 使用
package com.yiibai.customer.model; import java.sql.ResultSet; import java.sql.SQLException; import org.springframework.jdbc.core.RowMapper; public class CustomerRowMapper implements RowMapper { public Object mapRow(ResultSet rs, int rowNum) throws SQLException { Customer customer = new Customer(); customer.setCustId(rs.getInt("CUST_ID")); customer.setName(rs.getString("NAME")); customer.setAge(rs.getInt("AGE")); return customer; } }
public Customer findByCustomerId(int custId){ String sql = "SELECT * FROM CUSTOMER WHERE CUST_ID = ?"; Customer customer = (Customer)getJdbcTemplate().queryForObject( sql, new Object[] { custId }, new CustomerRowMapper()); return customer; }
在Spring2.5中,带有一个方便 RowMapper 实现所谓“BeanPropertyRowMapper”,它可以通过匹配行的名字的列值映射到一个属性。只要确保这两个属性和列具有相同的名称,如属性“CUSTID‘将匹配到列名为:”CUSTID‘或下划线“CUST_ID”。
public Customer findByCustomerId2(int custId){ String sql = "SELECT * FROM CUSTOMER WHERE CUST_ID = ?"; Customer customer = (Customer)getJdbcTemplate().queryForObject( sql, new Object[] { custId }, new BeanPropertyRowMapper(Customer.class)); return customer; }
public List<Customer> findAll(){ String sql = "SELECT * FROM CUSTOMER"; List<Customer> customers = new ArrayList<Customer>(); List<Map> rows = getJdbcTemplate().queryForList(sql); for (Map row : rows) { Customer customer = new Customer(); customer.setCustId((Long)(row.get("CUST_ID"))); customer.setName((String)row.get("NAME")); customer.setAge((Integer)row.get("AGE")); customers.add(customer); } return customers; }
public List<Customer> findAll(){ String sql = "SELECT * FROM CUSTOMER"; List<Customer> customers = getJdbcTemplate().query(sql, new BeanPropertyRowMapper(Customer.class)); return customers; }
public String findCustomerNameById(int custId){ String sql = "SELECT NAME FROM CUSTOMER WHERE CUST_ID = ?"; String name = (String)getJdbcTemplate().queryForObject( sql, new Object[] { custId }, String.class); return name; }
public int findTotalCustomer(){ String sql = "SELECT COUNT(*) FROM CUSTOMER"; int total = getJdbcTemplate().queryForInt(sql); return total; }
运行它
package com.yiibai.common; import java.util.ArrayList; import java.util.List; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.yiibai.customer.dao.CustomerDAO; import com.yiibai.customer.model.Customer; public class JdbcTemplateApp { public static void main( String[] args ) { ApplicationContext context = new ClassPathXmlApplicationContext("Spring-Customer.xml"); CustomerDAO customerDAO = (CustomerDAO) context.getBean("customerDAO"); Customer customerA = customerDAO.findByCustomerId(1); System.out.println("Customer A : " + customerA); Customer customerB = customerDAO.findByCustomerId2(1); System.out.println("Customer B : " + customerB); List<Customer> customerAs = customerDAO.findAll(); for(Customer cust: customerAs){ System.out.println("Customer As : " + customerAs); } List<Customer> customerBs = customerDAO.findAll2(); for(Customer cust: customerBs){ System.out.println("Customer Bs : " + customerBs); } String customerName = customerDAO.findCustomerNameById(1); System.out.println("Customer Name : " + customerName); int total = customerDAO.findTotalCustomer(); System.out.println("Total : " + total); } }
标签:integer xmla turn 数据库 lap .class java etc 使用
原文地址:http://www.cnblogs.com/soundcode/p/6367558.html