封装basedao

package com.huawei.common;

import java.sql.ResultSet;
import java.sql.SQLException;

public interface CallBack {

void execute(ResultSet rs) throws SQLException;
}

 

package com.huawei.utils;

import java.lang.reflect.Field;

import com.huawei.domain.Address;
import com.huawei.domain.Users;

/**
* bean 工具
* @author Administrator
*
*/
public class BeanUtil {

/**
* 获取set方法名
* 获取标名
* @param clazz
*/
public static String getTableName(Class clazz){
//获取类名
String name = clazz.getSimpleName();
name = name.substring(0, 1).toLowerCase()+name.substring(1);
return name;
}

/**
* @param field
* @return
*/
public static String setter(Field field){
String name = field.getName();
return "set"+name.substring(0,1).toUpperCase()+name.substring(1);
}
public static String getter(Field field){
String name = field.getName();
return "get"+name.substring(0,1).toUpperCase()+name.substring(1);
}

public static void main(String[] args) {
System.out.println(getTableName(Address.class));
}

public static String getColumnName(Field field){
String name = field.getName();
return name.substring(0,1).toLowerCase()+name.substring(1);
}
}

 

 

package com.huawei.utils;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

/**
* @author Administrator
*
*/
public class DBUtil {

/**
* 得到数据库连接
* @return
*/
public static Connection getConnection(){
//显示加载驱动
try {
Class.forName("com.mysql.jdbc.Driver");
Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "123456");
return connection;
} catch (ClassNotFoundException e) {
e.printStackTrace();
}catch (SQLException e) {
e.printStackTrace();
}
return null;
}

/**
*
* 释放资源
* @param objects
*/
public static void close(Object ...objects){
if(objects!=null && objects.length>0){
try {
for(Object o:objects){
if(o instanceof ResultSet){
((ResultSet)o).close();
}else if(o instanceof Statement){
((Statement)o).close();
}else if(o instanceof Connection){
((Connection)o).close();
}
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}

public static void main(String[] args) {
System.out.println(getConnection());
}
}

 

 

 

package com.huawei.base;

import java.io.Serializable;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import com.huawei.common.CallBack;
import com.huawei.domain.Users;
import com.huawei.utils.BeanUtil;
import com.huawei.utils.DBUtil;

/**
* @author Administrator
*
*
* void executeQuery(String sql,Object[] parmas,CallBack callback) 通用的查询
* void executeUpdate(String sql,Object[] parmas) //通用的执行
*
* List