This commit is contained in:
admin
2022-11-11 12:18:54 +08:00
parent c843272f03
commit 5b2586112a

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@@ -1,274 +0,0 @@
package sc545.pay.utils;
import java.lang.reflect.Field;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class DBUtil {
// 四大金刚
String driver = "com.mysql.jdbc.Driver";// 驱动名称
String url = "jdbc:mysql://"+ReadTxt.getSetting(null, "setting.ini", "MySqlIP","127.0.0.1")+":"+ReadTxt.getSetting(null, "setting.ini", "MySqlPort","3306")+"/"+ReadTxt.getSetting(null, "setting.ini", "MySqlName","test")+"?useUnicode=true&characterEncoding=UTF-8&useOldAliasMetadataBehavior=true&autoReconnect=true&useSSL=false";// 连接
String username = ReadTxt.getSetting(null, "setting.ini", "MySqlUserName","root");// 用户名
String password = ReadTxt.getSetting(null, "setting.ini", "MySqlPassWord","cheng355217");// 密码
// 三剑客
Connection con = null;// 连接对象
PreparedStatement pstmt = null;// 语句对象
ResultSet rs = null;// 结果集对象
/**
* 获得连接对象
*
* @return 连接对象
* @throws ClassNotFoundException
* @throws SQLException
*/
public Connection getConnection() {
try {
Class.forName(driver);
con = DriverManager.getConnection(url, username, password);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return con;
}
/**
* 关闭三剑客
*
* @throws SQLException
*/
public void close(ResultSet rs, PreparedStatement pstmt, Connection con) {
try {
if (rs != null)
rs.close();
if (pstmt != null)
pstmt.close();
if (con != null)
con.close();
} catch (SQLException e) {
// TODO: handle exception
e.printStackTrace();
}
}
/**
* 执行更新
*
* @param sql
* 传入的预设的 sql语句
* @param params
* 问号参数列表
* @return 影响行数
*/
public int execUpdate(String sql, Object[] params) {
try {
this.getConnection();// 获得连接对象
this.pstmt = this.con.prepareStatement(sql);// 获得预设语句对象
if (params != null) {
// 设置参数列表
for (int i = 0; i < params.length; i++) {
// 因为问号参数的索引是从1开始所以是i+1将所有值都转为字符串形式好让setObject成功运行
this.pstmt.setObject(i + 1, params[i] + "");
}
}
return this.pstmt.executeUpdate(); // 执行更新,并返回影响行数
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
this.close(this.rs, this.pstmt, this.con);
}
return 0;
}
/**
* 执行查询sql,返回记录条数
*
* @param sql
* @param params
* @return
*/
public int execSql(String sql, Object[] params) {
try {
this.getConnection();// 获得连接对象
this.pstmt = this.con.prepareStatement(sql);// 获得预设语句对象
if (params != null) {
// 设置参数列表
for (int i = 0; i < params.length; i++) {
// 因为问号参数的索引是从1开始所以是i+1将所有值都转为字符串形式好让setObject成功运行
this.pstmt.setObject(i + 1, params[i] + "");
}
}
int i = 0;
rs = this.pstmt.executeQuery();
while (rs.next()) {
i++;
}
return i; // 执行更新,并返回影响行数
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
this.close(this.rs, this.pstmt, this.con);
}
return 0;
}
/**
* 执行查询
*
* @param sql
* 传入的预设的 sql语句
* @param params
* 问号参数列表
* @return 查询后的结果
*/
public List<Map<String, Object>> execQuery(String sql, Object[] params) {
try {
this.getConnection();// 获得连接对象
this.pstmt = this.con.prepareStatement(sql);// 获得预设语句对象
if (params != null) {
// 设置参数列表
for (int i = 0; i < params.length; i++) {
// 因为问号参数的索引是从1开始所以是i+1将所有值都转为字符串形式好让setObject成功运行
this.pstmt.setObject(i + 1, params[i] + "");
}
}
// 执行查询
ResultSet rs = pstmt.executeQuery();
List<Map<String, Object>> al = new ArrayList<Map<String, Object>>();
// 获得结果集元数据(元数据就是描述数据的数据,比如把表的列类型列名等作为数据)
ResultSetMetaData rsmd = rs.getMetaData();
// 获得列的总数
int columnCount = rsmd.getColumnCount();
// 遍历结果集
while (rs.next()) {
Map<String, Object> hm = new HashMap<String, Object>();
for (int i = 0; i < columnCount; i++) {
// 根据列索引取得每一列的列名,索引从1开始
String columnName = rsmd.getColumnName(i + 1);
// 根据列名获得列值
Object columnValue = rs.getObject(columnName);
// 将列名作为key列值作为值放入 hm中每个 hm相当于一条记录
hm.put(columnName, columnValue);
}
// 将每个 hm添加到al中, al相当于是整个表每个 hm是里面的一条记录
al.add(hm);
}
return al;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
this.close(this.rs, this.pstmt, this.con);
}
return null;
}
/**
* 搜索统计
*
* @param search
* @return
*/
public boolean searchCount(String search) {
String resid = "0";
List<Map<String, Object>> res = execQuery(
"select id from byx_count where searchstr =?",
new String[] { search });
if (res != null && res.size() > 0) {
resid = res.get(0).get("id").toString();
int i = execUpdate(
"update byx_count set countsum = countsum+1 where id = "
+ resid, null);
return i > 0 ? true : false;
} else {
int i1 = execUpdate(
"insert into byx_count(countsum,searchstr) values(1,?)",
new String[] { search });
return i1 > 0 ? true : false;
}
}
/**
* 获取对象的属性,返回键值对
* @param obj
* @return
*/
public static HashMap<String, Object[]> reflect(Object obj) {
if (obj == null) return null;
Field[] fields = obj.getClass().getDeclaredFields();
String name="";
Object[] value=new Object[fields.length];
for (int j = 0; j < fields.length; j++) {
fields[j].setAccessible(true);
// 字段名
name+="`"+fields[j].getName() + "`,";
// 字段值
if (fields[j].getType().getName().equals(java.lang.String.class.getName())) {//String
try {
value[j]=(fields[j].get(obj));
} catch (Exception e) {e.printStackTrace();
}
} else if (fields[j].getType().getName().equals(java.lang.Long.class.getName()) || fields[j].getType().getName().equals("long")) {//int/long
try {
value[j]=(fields[j].getLong(obj));
} catch (Exception e) {e.printStackTrace();}
}else if (fields[j].getType().getName().equals(java.lang.Float.class.getName()) || fields[j].getType().getName().equals("float")) {//float/double
try {
value[j]=(fields[j].getFloat(obj));
} catch (Exception e) {e.printStackTrace();}
}else{// 其他类型。。。
try {
value[j]=(fields[j].get(obj));
} catch (Exception e) {e.printStackTrace();}
}
}
HashMap<String, Object[]> m=new HashMap<>();
m.put("name", new Object[]{name});
m.put("value", value);
return m;
}
}