自由编程打卡,请老师检查!
来源:9-2 自由编程
Mycheol
2020-08-28 00:35:47
package com.imooc.jdbc.goodsapp;
import java.util.Date;
/**
* Goods实体类
*/
public class Goods {
public Goods(){
}
private String name;
private float price;
private String desp;
private Date create_time;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public float getPrice() {
return price;
}
public void setPrice(float price) {
this.price = price;
}
public String getDesp() {
return desp;
}
public void setDesp(String desp) {
this.desp = desp;
}
public Date getCreate_time() {
return create_time;
}
public void setCreate_time(Date create_time) {
this.create_time = create_time;
}
@Override
public String toString() {
return "Goods [name=" + name + ", price=" + price +
", desp=" + desp + ", create_time=" + create_time + ']';
}
}package com.imooc.jdbc.goodsapp;
import com.alibaba.druid.pool.DruidDataSourceFactory;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import javax.sql.DataSource;
import java.io.FileInputStream;
import java.net.URLDecoder;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;
import java.util.Properties;
public class GoodsQuery {
private static void update() {
Properties properties = new Properties();
String propertyFlie = GoodsQuery.class.getResource("/druid-config.properties").getPath();
Connection conn = null;
try {
propertyFlie = new URLDecoder().decode(propertyFlie, "UTF-8");
properties.load(new FileInputStream(propertyFlie));
DataSource dataSource = DruidDataSourceFactory.createDataSource(properties);
conn = dataSource.getConnection();
conn.setAutoCommit(false);
String sql = "insert into goods (name,price,desp,create_time) values (?,?,?,?)";
QueryRunner qr = new QueryRunner();
qr.update(conn, sql, new Object[]{"照相机", 5000, "放水,索尼", "1999/01/30"});
conn.commit();
query();
} catch (Exception e) {
e.printStackTrace();
try {
if (conn != null && !conn.isClosed()) {
conn.rollback();
System.out.println("添加失败!");
}
} catch (SQLException e1) {
e1.printStackTrace();
}
} finally {
try {
if (conn != null && !conn.isClosed()) {
conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
private static void query() {
Properties properties = new Properties();
String propertyFlie = GoodsQuery.class.getResource("/druid-config.properties").getPath();
Connection conn = null;
String str = null;
try {
propertyFlie = new URLDecoder().decode(propertyFlie, "UTF-8");
properties.load(new FileInputStream(propertyFlie));
DataSource dataSource = DruidDataSourceFactory.createDataSource(properties);
QueryRunner qr = new QueryRunner(dataSource);
List<Goods> list = qr.query("select * from goods",
new BeanListHandler<>(Goods.class));
for (Goods gds : list) {
System.out.println(gds.toString());
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
update();
}
}1回答
同学你好,练习题完成的不错,很棒,继续加油
祝学习愉快
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