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厦门商城网站建设,营业推广的方式,mvc5 网站开发之美 pdf,莘县网站建设目录 一、基类BaseDao 二、对dog表的批量增删改操作 (一)Dog类 (二)DogDao接口 (三)DogDaoImpl实现类 1.批量新增 2.批量删除 3.批量修改 (四)Test测试 1.新增 2.删除 3.修改 三、对master表进行批量增删改 (一)Master类 (二)MasterDao接口 (三)MasterDaoImpl实…

目录

一、基类BaseDao

二、对dog表的批量增删改操作

(一)Dog类

(二)DogDao接口

(三)DogDaoImpl实现类

1.批量新增

2.批量删除

3.批量修改

(四)Test测试

1.新增

2.删除

3.修改

三、对master表进行批量增删改

(一)Master类

(二)MasterDao接口

(三)MasterDaoImpl实现类

1.批量新增

2.批量删除

3.批量修改

(四)Test测试

1.新增

2.删除

3.修改

一、基类BaseDao

package nj.zb.kb21.dao;import nj.zb.kb21.dao3.ConnectionPoolImpl;
import nj.zb.kb21.utils.C3p0Util;
import nj.zb.kb21.utils.DbConfig;import java.io.IOException;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;/*** 加载properties文件，实例化Connection对象，释放资源，执行公共方法*/
public class BaseDao {private static String driver;private static String url;private static String user;private static String pwd;static {Properties properties = new Properties();InputStream inputStream =          BaseDao.class.getClassLoader().getResourceAsStream("database.properties");try {properties.load(inputStream);} catch (IOException e) {e.printStackTrace();}driver = properties.getProperty("mysqldriver");url = properties.getProperty("mysqlurl");user = properties.getProperty("mysqluser");pwd = properties.getProperty("mysqlpwd");System.out.println(driver);System.out.println(url);System.out.println(user);System.out.println(pwd);}public Connection getConnection(){Connection connection = null;try {Class.forName(driver);connection = DriverManager.getConnection(url, user, pwd);} catch (ClassNotFoundException e) {e.printStackTrace();} catch (SQLException e) {e.printStackTrace();}return connection;}public void close(PreparedStatement preparedStatement, Connection connection, ResultSet resultSet){try {if(null != preparedStatement){preparedStatement.close();}if(null != connection){connection.close();}if(null != resultSet){resultSet.close();}} catch (SQLException e) {e.printStackTrace();}}public void close(PreparedStatement preparedStatement, Connection connection){try {if(null != preparedStatement){preparedStatement.close();}if(null != connection){connection.close();}} catch (SQLException e) {e.printStackTrace();}}public void close(Connection connection){try {if(null != connection){connection.close();}} catch (SQLException e) {e.printStackTrace();}}public int executeUpdate(String sqlStr,Object... params){Connection connection = this.getConnection();PreparedStatement preparedStatement = null;int num = -1;try {preparedStatement = connection.prepareStatement(sqlStr);if(null != params){for (int i = 0;i < params.length;i++){preparedStatement.setObject(i+1,params[i]);}}num = preparedStatement.executeUpdate();}catch (SQLException e) {e.printStackTrace();}finally {this.close(preparedStatement,connection);}return num;}public static void main(String[] args) {BaseDao baseDao = new BaseDao();Connection connection = baseDao.getConnection();System.out.println(connection+"连接成功！");System.out.println("over");}
}

二、对dog表的批量增删改操作

(一)Dog类

package nj.zb.kb21.pojo;import java.util.Date;
import java.util.List;public class Dog {// 数据库中的每一个字段映射为java类// name,health,love,private Integer id;private String name;private Integer health;private Integer love;private String strain;private Date lytime;private List<Master> master;// 当前狗狗对象有过的主人信息    一对多public List<Master> getMaster() {return master;}public void setMaster(List<Master> master) {this.master = master;}public Dog() {}public Dog(Integer id, String name, Integer health, Integer love, String strain, Date lytime) {this.id = id;this.name = name;this.health = health;this.love = love;this.strain = strain;this.lytime = lytime;}public Dog(String name, Integer health, Integer love, String strain) {this.name = name;this.health = health;this.love = love;this.strain = strain;}@Overridepublic String toString() {return "Dog{" +"id=" + id +", name='" + name + '\'' +", health=" + health +", love=" + love +", strain='" + strain + '\'' +", lytime=" + lytime +'}';}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getHealth() {return health;}public void setHealth(Integer health) {this.health = health;}public Integer getLove() {return love;}public void setLove(Integer love) {this.love = love;}public String getStrain() {return strain;}public void setStrain(String strain) {this.strain = strain;}public Date getLytime() {return lytime;}public void setLytime(Date lytime) {this.lytime = lytime;}
}

(二)DogDao接口

package nj.zb.kb21.dao;import nj.zb.kb21.pojo.Dog;
import java.util.List;public interface DogDao {/**** @param dogs 要新增的狗狗集合* @return*/Integer batchSaveDog(List<Dog> dogs);/**** @param ids 要删除的狗狗id集合* @return*/Integer batchDelDog(List<Integer> ids);/**** @param dogs 要批量修改的狗狗集合* @return*/Integer batchUpdateDog(List<Dog> dogs);}

(三)DogDaoImpl实现类

1.批量新增

package nj.zb.kb21.dao;import nj.zb.kb21.pojo.Dog;
import nj.zb.kb21.pojo.Master;import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;public class DogDaoImpl extends BaseDao implements DogDao{
// 批量新增@Overridepublic Integer batchSaveDog(List<Dog> dogs) {String sql = "insert into dog(name,health,love,strain,lytime) values";for (Dog dog :dogs) {sql += "('"+dog.getName()+"',"+dog.getHealth()+","+dog.getLove()+",'"+dog.getStrain()+"',now()),";}System.out.println(sql);sql = sql.substring(0,sql.length()-1);int num = super.executeUpdate(sql);return num;}
}

2.批量删除

    // 批量删除@Overridepublic Integer batchDelDogById(List<Integer> ids) {String sql = "delete from dog where id in (";for (Integer idss :ids) {sql += idss+",";}sql = sql.substring(0,sql.length()-1);sql +=");";System.out.println(sql);int num = super.executeUpdate(sql);System.out.println("根据id批量删除成功！"+num);return num;}

3.批量修改

// 批量修改@Overridepublic Integer batchUpdateDog(List<Dog> dogs) {
//        String sql = "update dog set name = n1,health = 20,love = 30 where id = 1";String sql = "";int num = 0;for (Dog dog :dogs) {sql = "update dog set";if(dog.getName()!=null&dog.getName()!=""){sql += " name='"+dog.getName()+"',";}if(dog.getHealth()!=null){sql += " health="+dog.getHealth()+",";}if(dog.getLove()!=null){sql += " love="+dog.getLove()+",";}if(dog.getStrain()!=null&dog.getStrain()!=""){sql += " strain='"+dog.getStrain()+"',";}sql = sql.substring(0,sql.length()-1)+" where id="+dog.getId()+";";System.out.println(sql);num += super.executeUpdate(sql);}return num;}

(四)Test测试

1.新增

    @Testpublic void testBatchSaveDog(){DogDaoImpl dogDao = new DogDaoImpl();Dog dog1 = new Dog("a1", 100, 100, "t1");Dog dog2 = new Dog("b1", 100, 90, "t2");Dog dog3 = new Dog("c1", 100, 80, "t3");ArrayList<Dog> dogs = new ArrayList<>();dogs.add(dog1);dogs.add(dog2);dogs.add(dog3);dogDao.batchSaveDog(dogs);}

运行结果

2.删除

    @Testpublic void testBatchDelDog(){DogDaoImpl dogDao = new DogDaoImpl();ArrayList<Integer> ids = new ArrayList<>();ids.add(2);ids.add(3);ids.add(7);ids.add(8);dogDao.batchDelDogById(ids);}

3.修改

    @Testpublic void testBatchUpdateDog(){DogDaoImpl dogDao = new DogDaoImpl();Dog dog1 = new Dog();dog1.setId(54);dog1.setName("www");dog1.setHealth(40);Dog dog2 = new Dog();dog2.setId(55);dog2.setName("eee");Dog dog3 = new Dog();dog3.setId(56);dog3.setLove(77);dog3.setStrain("哈士奇");ArrayList<Dog> dogs = new ArrayList<>();dogs.add(dog1);dogs.add(dog2);dogs.add(dog3);Integer integer = dogDao.batchUpdateDog(dogs);System.out.println(integer);}

运行结果 

三、对master表进行批量增删改

(一)Master类

package nj.zb.kb21.pojo;public class Master {private Integer pid;private String name;private Integer age;private String gender;private Integer yearnum;private Integer did;private Dog dog;public Master(String name, Integer age, String gender, Integer yearnum, Integer did) {this.name = name;this.age = age;this.gender = gender;this.yearnum = yearnum;this.did = did;}public Master(Integer pid, String name, Integer age, String gender, Integer yearnum, Integer did, Dog dog) {this.pid = pid;this.name = name;this.age = age;this.gender = gender;this.yearnum = yearnum;this.did = did;this.dog = dog;}public Master() {}@Overridepublic String toString() {return "Master{" +"pid=" + pid +", name='" + name + '\'' +", age=" + age +", gender='" + gender + '\'' +", yearnum=" + yearnum +", did=" + did +", dog=" + dog +'}';}public Integer getPid() {return pid;}public void setPid(Integer pid) {this.pid = pid;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}public Integer getYearnum() {return yearnum;}public void setYearnum(Integer yearnum) {this.yearnum = yearnum;}public Integer getDid() {return did;}public void setDid(Integer did) {this.did = did;}public Dog getDog() {return dog;}public void setDog(Dog dog) {this.dog = dog;}
}

(二)MasterDao接口

package nj.zb.kb21.dao;import nj.zb.kb21.pojo.Master;
import java.util.List;public interface MasterDao {Integer batchSaveMaster(List<Master> masters);Integer batchDelMasterById(List<Integer> ids);Integer batchUpdateMaster(List<Master> masters);
}

(三)MasterDaoImpl实现类

1.批量新增

package nj.zb.kb21.dao;import nj.zb.kb21.pojo.Dog;
import nj.zb.kb21.pojo.Master;import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.List;public class MasterDaoImpl extends BaseDao implements MasterDao{@Overridepublic Integer batchSaveMaster(List<Master> masters) {String sql = "insert into master(name,age,gender,yearnum,did) values";for (Master master :masters) {sql += "('"+master.getName()+"',"+master.getAge()+",'"+master.getGender()+"',"+master.getYearnum()+","+master.getDid()+"),";}sql = sql.substring(0,sql.length()-1);System.out.println(sql);int num = super.executeUpdate(sql);System.out.println("批量新增成功"+num);return num;}
}

2.批量删除

    @Overridepublic Integer batchDelMasterById(List<Integer> ids) {String sql = "delete from master where pid in (";for (Integer idss :ids) {sql += idss+",";}sql = sql.substring(0,sql.length()-1);sql +=");";System.out.println(sql);int num = super.executeUpdate(sql);System.out.println("根据pid批量删除成功！"+num);return num;}

3.批量修改

    @Overridepublic Integer batchUpdateMaster(List<Master> masters) {String sql = "";int num = 0;for (Master master :masters) {sql = "update master set";if(master.getName()!=null&master.getName()!=""){sql += " name='"+master.getName()+"',";}if(master.getAge()!=null){sql += " age="+master.getAge()+",";}if(master.getGender()!=null&master.getGender()!=""){sql += " gender='"+master.getGender()+"',";}if(master.getYearnum()!=null){sql += " yearnum="+master.getYearnum()+",";}if(master.getDid()!=null){sql += " did="+master.getDid()+",";}sql = sql.substring(0,sql.length()-1)+" where pid="+master.getPid()+";";System.out.println(sql);num += super.executeUpdate(sql);}System.out.println("更新成功！");return num;}

(四)Test测试

1.新增

    @Testpublic void testBatchSaveMaster(){MasterDaoImpl masterDao = new MasterDaoImpl();Master master1 = new Master("m1", 20, "男", 2, 3);Master master2 = new Master("m2", 20, "男", 2, 3);Master master3 = new Master("m3", 20, "男", 2, 3);ArrayList<Master> masters = new ArrayList<>();masters.add(master1);masters.add(master2);masters.add(master3);masterDao.batchSaveMaster(masters);}

运行结果

2.删除

  @Testpublic void testBatchDelMaster(){MasterDaoImpl masterDao = new MasterDaoImpl();ArrayList<Integer> ids = new ArrayList<>();ids.add(10);ids.add(11);ids.add(12);masterDao.batchDelMasterById(ids);}

3.修改

    @Testpublic void testBatchUpdateMaster(){MasterDaoImpl masterDao = new MasterDaoImpl();Master master1 = new Master();master1.setPid(13);master1.setName("name1");master1.setYearnum(10);Master master2 = new Master();master2.setPid(14);master2.setName("name2");master2.setGender("女");Master master3 = new Master();master3.setPid(15);master3.setName("name3");master3.setDid(60);ArrayList<Master> masters = new ArrayList<>();masters.add(master1);masters.add(master2);masters.add(master3);Integer integer = masterDao.batchUpdateMaster(masters);System.out.println(integer);}

运行结果

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