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借助 BeanKeeper 快速实现对象持久化

 2010-06-18 00:00:00 来源:WEB开发网   
核心提示: packagecn.ac.iscas.beankeeper.sample;importjava.util.Date;publicclassEmployeeBean{Stringid;Stringname;intage;DateonBoardTime;publicStringgetId(){ret

package cn.ac.iscas.beankeeper.sample; 
 
import java.util.Date; 
 
public class EmployeeBean { 
  String id; 
  String name; 
  int age; 
  Date onBoardTime; 
 
  public String getId() { 
    return id; 
  } 
 
  public void setId(String id) { 
    this.id = id; 
  } 
 
  public String getName() { 
    return name; 
  } 
 
  public void setName(String name) { 
    this.name = name; 
  } 
 
  public int getAge() { 
    return age; 
  } 
 
  public void setAge(int age) { 
    this.age = age; 
  } 
 
  public Date getOnBoardTime() { 
    return onBoardTime; 
  } 
 
  public void setOnBoardTime(Date onBoardTime) { 
    this.onBoardTime = onBoardTime; 
  } 
 
} 

接下来存储 EmployeeBean 对象到数据库中。首先从 CSV 文件中一条条读出员工信息,然后将这些信息生成一个 EmployeeBean 对象,最后将 EmployeeBean 对象持久化到数据库。

清单 2. 保存 EmployeeBean 对象代码

package cn.ac.iscas.beankeeper.sample; 
 
import hu.netmind.persistence.Store; 
import java.io.File; 
import java.sql.Date; 
import java.util.List; 
import org.apache.commons.io.FileUtils; 
import org.apache.commons.logging.Log; 
import org.apache.commons.logging.LogFactory; 
 
public class EmployeeSave { 
  private static Log log; 
  /** 
  * @param args 
  */ 
  public static void main(String[] args) { 
    System.setProperty("log4j.configuration", "file:log4j.xml"); 
    log = LogFactory.getLog(EmployeeBean.class); 
    try { 
      String csvFile = args[0]; 
      // open store, uses MySQL driver 
      Store store = new Store("org.gjt.mm.mysql.Driver", 
        "jdbc:mysql://localhost:3306/lhq?user=root&password=sa"); 
      // read csv and generate beans 
      List historicalData = FileUtils.readLines(new File(csvFile)); 
      // remove first line (header) 
      historicalData.remove(0); 
      // store beans to database 
      for (Object _data : historicalData) { 
        String[] data = ((String) _data).split(","); 
        EmployeeBean bean = new EmployeeBean(); 
        bean.setId(data[0]); 
        bean.setName(data[1]); 
        bean.setAge(Integer.parseInt(data[2])); 
        bean.setOnBoardTime(Date.valueOf(data[3])); 
   
        // save stock bean to database 
        store.save(bean); 
      } 
    } catch (Exception e) { 
      log.error(e.getMessage(), e); 
      system.out.println("Usage: java sample.StockData " 
        + "<symbol name> <historical prices file> <query>"); 
    } 
  } 
} 

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