DbutilHelper
为更方便的进行数据库操作
package com.gg.core.dbutil;
import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.MapListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;
import org.apache.log4j.Logger;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Created by Administrator on 2015/1/10.
*/
public class DbutilHelper {
private static Logger logger = Logger.getLogger(DbutilHelper.class);
private static Connection conn = null;
private static String url = "jdbc:mysql://192.168.1.124:3306/hunqing?useUnicode=true&characterEncoding=UTF-8";
private static String jdbcDriver = "com.mysql.jdbc.Driver";
private static String user = "zhiqiao";
private static String password = "zhendebuxing($!";
/**
* 查询 支持?占位�?
* @param sql
* @param args
* @return
*/
public static List<Map<String,Object>> query(String sql,Object... args){
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
List<Map<String,Object>> results = (List<Map<String,Object>>) qr.query(conn, sql, new MapListHandler(),args);
return results;
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
return null;
}
/**
* 根据ID获取对象
* @param tableName
* @param id
* @return
*/
public static Map<String,Object> getObjectById(String tableName,int id){
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
String sql = "select * from "+tableName+" where id=?";
List<Map<String,Object>> results = (List<Map<String,Object>>) qr.query(conn, sql, new MapListHandler(),id);
logger.info(sql);
return results.size()>0?results.get(0):null;
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
return null;
}
/**
* 修改 支持占位�?
* @param sql
* @param args
* @return 被更改的条数，如果更改失败返�-1
*/
public static int update(String sql,Object... args){
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
return qr.update(conn,sql,args);
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
return -1;
}
/**
* 根据ID来修�?
* @param tableName
* @param map
* @param id
* @return
*/
public static int updateById(String tableName,Map<String,Object> map,int id){
Map<String,String> rp = DbutilHelper.getClumonProperty(tableName);
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
StringBuffer sb = new StringBuffer("update ");
sb.append(tableName);
sb.append(" set ");
for (String s : map.keySet()) {
String type = rp.get(s);
if(type.indexOf("char")>=0 || type.indexOf("text")>=0){
String str = (String) map.get(s);
str = str==null?"":str;
sb.append(s+"='"+str+"',");
}else if(type.indexOf("datetime") >=0){
sb.append(s+"='"+map.get(s)+"',");
}else{
sb.append(s+"="+map.get(s)+",");
}
}
sb.deleteCharAt(sb.length()-1);
sb.append(" where id=");
sb.append(id);
logger.info(sb.toString());
return qr.update(conn,sb.toString());
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
return -1;
}
/**
* 插入数据
* @param tableName
* @param map
* @return ID
*/
public static Integer insertReturnId(String tableName,Map<String,Object> map){
Map<String,String> rp = DbutilHelper.getClumonProperty(tableName);
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
StringBuffer sb = new StringBuffer("insert into "+tableName+"(");
for (String s : map.keySet()) {
sb.append(s+",");
}
sb.append("created_at,updated_at,is_delete) values(");
for (String s : map.keySet()) {
String type = rp.get(s);
if(type.indexOf("char")>=0 || type.indexOf("text")>=0){
sb.append("'"+map.get(s)+"',");
}else{
sb.append(map.get(s)+",");
}
}
sb.append("now(),now(),0)");
logger.info(sb.toString());
qr.update(conn,sb.toString());
Object oid = qr.query(conn, "SELECT LAST_INSERT_ID()", new ScalarHandler(1));
int id = Integer.parseInt(oid.toString());
return id;
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
return -1;
}
/**
* 插入数据
* @param tableName
* @param map
* @return 更新条数
*/
public static Integer insert(String tableName,Map<String,Object> map){
Map<String,String> rp = DbutilHelper.getClumonProperty(tableName);
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
StringBuffer sb = new StringBuffer("insert into "+tableName+"(");
for (String s : map.keySet()) {
sb.append(s+",");
}
sb.append("created_at,updated_at,is_delete) values(");
for (String s : map.keySet()) {
String type = rp.get(s);
if(type.indexOf("char")>=0 || type.indexOf("text")>=0){
sb.append("'"+map.get(s)+"',");
}else{
sb.append(map.get(s)+",");
}
}
sb.append("now(),now(),0)");
logger.info(sb.toString());
return qr.update(conn,sb.toString());
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
return -1;
}
/**
* 删除
* @param sql 原生态SQL
* @param args
* @return
*/
public static int delete(String sql,Object... args){
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
return qr.update(conn,sql,args);
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
return -1;
}
/**
* 删除
* @param tableName
* @param map
* @return
*/
public static int delete(String tableName,Map<String,Object> map){
Map<String,String> rp = DbutilHelper.getClumonProperty(tableName);
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
StringBuffer sb = new StringBuffer("delete from "+tableName+" where ");
for (String s : map.keySet()) {
if(rp.get(s).indexOf("char")>=0){
sb.append(" "+s+"='"+map.get(s)+"' and");
}else{
sb.append(" "+s+"="+map.get(s)+" and");
}
}
int n = sb.length();
sb.delete(n-3,n);
logger.info(sb.toString());
return qr.update(conn,sb.toString());
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
return -1;
}
/**
* 根据ID删除
* @param tableName
* @param id
* @return
*/
public static int deleteById(String tableName,int id){
DbUtils.loadDriver(jdbcDriver);
try {
conn = DriverManager.getConnection(url, user, password);
QueryRunner qr = new QueryRunner();
StringBuffer sb = new StringBuffer("delete from "+tableName+" where id="+id);
logger.info(sb.toString());
return qr.update(conn,sb.toString());
} catch (SQLException e) {
e.printStackTrace();
} finally {
DbUtils.closeQuietly(conn);
}
return -1;
}
/**
* 获取表格单元属�?
* @param tableName
* @return
*/
public static Map<String,String> getClumonProperty(String tableName){
List<Map<String,Object>> map = DbutilHelper.select("desc " + tableName);
Map<String,String> result_map = new HashMap<String,String>();
for (Map<String, Object> sm : map) {
String cName = (String)sm.get("COLUMN_NAME");
String cType =(String)sm.get("COLUMN_TYPE");
result_map.put(cName,cType);
}
return result_map;
}
}
maven:
<dependencies> <dependency> <groupId>commons-dbutils</groupId> <artifactId>commons-dbutils</artifactId> <version>1.5</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.30</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.2</version> </dependency> </dependencies>