段对第一阶段冲刺3总结
作者：互联网
今天冲刺任务就是完成dao层的编写
package com.supercook.dao;
import com.supercook.dButils.JdbcUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;
public class BaseDao {
//使用dButils操作数据库
private QueryRunner queryRunner = new QueryRunner();
/**
* update()用来执行：Insert\Update\Delete语句
*
* @return 如果返回-1，说明执行失败<br/>返回其他表所示影响的行数
*/
public int update(String sql,Object... args){
Connection connection =
JdbcUtils.getConnection();
try {
return queryRunner.update(connection, sql,args);
} catch (SQLException e)
{
e.printStackTrace();
}finally {
JdbcUtils.close(connection);
}
return -1;
}
/**
* 查询返回一个JavaBean的sql语句
*
* @param type 返回对象的类型
* @param sql 执行的sql语句
* @param args sql对应的参数值
* @param <T>
返回的类型的泛型
* @return
*/
public <T> T queryForOne(Class<T> type,String sql,Object... args){
Connection con = JdbcUtils.getConnection();
try {
return queryRunner.query(con,sql,new BeanHandler<T>(type),args);
} catch (SQLException e)
{
e.printStackTrace();
}finally {
JdbcUtils.close(con);
}
return null;
}
/**
* 查询返回多个JavaBean的sql语句
*
* @param type 返回对象的类型
* @param sql 执行的sql语句
* @param args sql对应的参数值
* @param <T>
返回的类型的泛型
* @return
*/
public <T> List<T> queryForList(Class<T> type, String sql, Object... args){
Connection con = JdbcUtils.getConnection();
System.out.println(con);
try {
return queryRunner.query(con,sql,new BeanListHandler<T>(type),args);
} catch (SQLException e)
{
e.printStackTrace();
}finally {
JdbcUtils.close(con);
}
return null;
}
/**
* 执行返回一行一列的sql语句
* @param sql 执行的sql语句
* @param args sql对应的参数值
* @return
*/
public Object queryForSingleValue(String sql,Object... args){
Connection conn = JdbcUtils.getConnection();
try {
return queryRunner.query(conn,sql,new ScalarHandler(),args);
} catch (SQLException e)
{
e.printStackTrace();
} finally {
JdbcUtils.close(conn);
}
return null;
}
}
package com.supercook.dao;
import com.supercook.bean.Food;
import com.supercook.bean.Food2;
import com.supercook.bean.Windows;
import java.util.List;
public interface FoodDao {
/**
* 根据food名查询food信息
*
* @param foodname food名
* @return 如果返回null, 说明没有这个food。反之亦然
*/
public List<Food> queryxiaochi(String foodname);
/**
* 根据food名查询food信息
* @param foodname food名
* @return 如果返回null,说明没有这个food。反之亦然
*/
public List<Food> querynoodle(String foodname);
/**
* 根据food名查询food信息
* @param foodname food名
* @return 如果返回null,说明没有这个food。反之亦然
*/
public List<Food> queryrice(String foodname);
/**
* 根据food名查询food信息
* @param foodname food名
* @return 如果返回null,说明没有这个food。反之亦然
*/
public List<Food> querypastry(String foodname);
/**
* 根据food名查询food信息
* @param foodname food名
* @return 如果返回null,说明没有这个food。反之亦然
*/
public List<Food> querydish(String foodname);
/**
* 根据food名查询food信息
* @param foodname food名
* @return 如果返回null,说明没有这个food。反之亦然
*/
public List<Food> querysimplesnack(String foodname);
/**
* 根据food名查询food信息
* @param foodname food名
* @return 如果返回null,说明没有这个food。反之亦然
*/
public List<Food> querydrink(String foodname);
/**
* 根据food名查询food信息
* @param foodname food名
* @return 如果返回null,说明没有这个food。反之亦然
*/
public List<Food> querysoup(String foodname);
/**
* 根据kind名查询food信息
* @param kind food名
* @return 如果返回null,说明没有这个food。反之亦然
*/
public List<Food> querykind(String kind);
/**
* 根据foodname名查询food信息
* @param foodname food名
* @return 如果返回null,说明没有这个food。反之亦然
*/
public List<Food2> search(String foodname);
public int dianzan(String name);
public int dianzan1(String name);
public Windows querysrc(String name);
}
package com.supercook.dao;
public interface UserDao {
public int adduser(String username,String password,String number,String email,String sex,String age,String weight);
public int login(String name,String paw);
}
package com.supercook.dao;
import com.supercook.bean.Food;
import com.supercook.bean.Food2;
import com.supercook.bean.Windows;
import com.supercook.dButils.JdbcUtils;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
public class FoodDaoImpl extends BaseDao implements FoodDao {
@Override
public List<Food> queryxiaochi(String foodname) {
String sql = "select * from food join windows on food.position=windows.WPosition where foodname = ? and kind = '小吃'";
return queryForList(Food.class,sql,foodname);
}
@Override
public List<Food> querynoodle(String foodname) {
String sql = "select * from food where foodname = ? and kind = '面食'";
return queryForList(Food.class,sql,foodname);
}
@Override
public List<Food> queryrice(String foodname) {
String sql = "select * from food join windows on food.position=windows.WPosition where foodname = ? and kind = '米饭'";
return queryForList(Food.class,sql,foodname);
}
@Override
public List<Food> querypastry(String foodname) {
String sql = "select * from food where foodname = ? and kind = '面点'";
return queryForList(Food.class,sql,foodname);
}
@Override
public List<Food> querydish(String foodname) {
String sql = "select * from food where foodname = ? and kind = '面食配菜'";
return queryForList(Food.class,sql,foodname);
}
@Override
public List<Food> querysimplesnack(String foodname) {
String sql = "select * from food where foodname = ? and kind = '中式简餐'";
return queryForList(Food.class,sql,foodname);
}
@Override
public List<Food> querydrink(String foodname) {
String sql = "select * from food where foodname = ? and kind = '饮品'";
return queryForList(Food.class,sql,foodname);
}
@Override
public List<Food> querysoup(String foodname) {
String sql = "select * from food where foodname = ? and kind = '汤'";
return queryForList(Food.class,sql,foodname);
}
@Override
public List<Food> querykind(String kind) {
String sql = "select * from food where kind = ?";
return queryForList(Food.class,sql,kind);
}
@Override
public List<Food2> search(String name) {
String sql = "select * from food join windows on food.position=windows.WPosition where foodname like '%"+name+"%' or WName like '%"+name+"%'";
Connection connection = JdbcUtils.getConnection();
Statement statement = null;
ResultSet rs = null;
List<Food2> list = new ArrayList<>();
try {
statement = connection.createStatement();
rs = statement.executeQuery(sql);
Food2 kc=null;
while(rs.next())
{
int WId=rs.getInt("WId");
String WPosition=rs.getString("WPosition");
String WName=rs.getString("WName");
int id=rs.getInt("id");
String foodname=rs.getString("foodname");
double price=rs.getDouble("price");
String kind=rs.getString("kind");
//String img=rs.getString("img");
int score=rs.getInt("score");
kc =new Food2(WId,WPosition,price,WName,id,kind,foodname,score);
System.out.println(kc);
list.add(kc);
}
} catch (SQLException e) {
e.printStackTrace();
}finally {
JdbcUtils.close(connection);
}
return list;
}
@Override
public int dianzan(String name) {
String sql = "update windows set score=score+1 where WName='"+name+"'";
Connection connection = JdbcUtils.getConnection();
Statement statement = null;
ResultSet resultSet = null;
int flag = 0;
try {
statement = connection.createStatement();
int i = statement.executeUpdate(sql);
if(i>0){
System.out.println("点赞成功");
}else {
System.out.println("点赞失败");
}
} catch (SQLException e) {
throw new RuntimeException(e);
}finally {
JdbcUtils.close(connection);
}
return flag;
}
@Override
public int dianzan1(String name) {
String sql = "update windows set score=score+1 where WPosition='"+name+"'";
Connection connection = JdbcUtils.getConnection();
Statement statement = null;
ResultSet resultSet = null;
int flag = 0;
try {
statement = connection.createStatement();
int i = statement.executeUpdate(sql);
if(i>0){
System.out.println("点赞成功");
}else {
System.out.println("点赞失败");
}
} catch (SQLException e) {
throw new RuntimeException(e);
}finally {
JdbcUtils.close(connection);
}
return flag;
}
@Override
public Windows querysrc(String name) {
String sql = "select * from windows where WPosition = ?";
return queryForOne(Windows.class,sql,name);
}
}
package com.supercook.dao;
import com.supercook.bean.User;
import java.util.List;
public class UserDaoImpl extends BaseDao implements UserDao{
@Override
public int adduser(String username, String password, String number, String email, String sex, String age, String weight) {
String sql = "insert into user(username,password,number,email,sex,age,weight)values('"+username+"','"+password+"','"+number+"','"+email+"','"+sex+"','"+age+"','"+weight+"')";
return update(sql,username,password,number,email,sex,age,weight);
}
@Override
public int login(String name, String paw) {
int flag = 0;
String sql = "select * from user";
List<User> users = queryForList(User.class, sql);
for(int i = 0;i < users.size();i++){
if(users.get(i).getUsername().equals(name)&&users.get(i).getPassword().equals(paw)){
flag = 1;
}
}
if(flag == 1){
System.out.println("登陆成功");
}else {
System.out.println("登陆失败");
}
return flag;
}
}
标签：总结,return,String,food,冲刺,public,sql,foodname,第一阶段 来源： https://www.cnblogs.com/20203923rensaihang/p/16373348.html