基于SSH2增删改查_工具类Util(5)
删除文件的工具类：↓DeleteFileUtil.java
package com.ssh02.util;
import java.io.File;
public class DeleteFileUtil {
public static boolean deleteFilePath(String path,String[] paths){
File f= null;
if(path != null){
f= new File(path);
if(f.exists()){
f.delete();
return true;
}
}
if(paths.length >= 1){
for(int i=0; i<paths.length; i++){
f = new File(paths[i]);
if(f.exists()){
f.delete();
}
}
return true;
}
return false;
}
}
随机文件名工具：IPTimeRandom.java （这工具不陌生
）
package com.ssh02.util;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
public class IPTimeRandom {
private SimpleDateFormat sdf = null;
private String ip = null;
public IPTimeRandom(){
}
public IPTimeRandom(String ip){
this.ip = ip;
}
public String getIPTimeRandom(){
StringBuffer buf = new StringBuffer();
if(this.ip != null){
String s[] = this.ip.split("\\:");
for(int i=0; i<s.length; i++)
{
buf.append(this.addZero(s[i], 4));
}
}
buf.append(this.getDate());
Random r = new Random();
for(int i=0; i<3; i++)
{
buf.append(r.nextInt(10));
}
return buf.toString();
}
public String addZero(String str,int len){
StringBuffer s = new StringBuffer();
s.append(str);
while(s.length() < len){
s.insert(0, "0");
}
return s.toString();
}
public String getDate(){
this.sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
return this.sdf.format(new Date());
}
}
Md5加密处理工具：↓Md5Util.java
package com.ssh02.util;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class Md5Util {
public static String md5s(String newstr){
String str = null;
MessageDigest md = null;
try {
md = MessageDigest.getInstance("MD5");
md.update(newstr.getBytes());
byte[] b = md.digest();
int i;
StringBuffer buf = new StringBuffer("");
for(int j = 0; j<b.length; j++){
i = b[j];
if(i<0)i+=256;
if(i<16)buf.append("0");
buf.append(Integer.toHexString(i));
}
str = buf.toString().toUpperCase();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return str;
}
public static void main(String[] args){
System.out.println(Md5Util.md5s("123"));
}
}
文件上传工具：↓Upload.java
package com.ssh02.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
public class Upload {
public static void is(File file, String uploadPath, String newFileName) throws Exception{
FileInputStream is = new FileInputStream(file);
FileOutputStream os = new FileOutputStream(uploadPath + "/" + newFileName);
byte[] buff = new byte[1024];
int newint = 0;
while((newint = is.read(buff))> 0){
os.write(buff, 0, newint);
}
is.close();
os.close();
}
}
连接mysql工具：↓Upload.java
package com.itjiandan.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class DBManager {
static
{
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
public static Connection getConnection(){
Connection conn = null;
try {
conn = DriverManager.getConnection("jdbc:mysql://localhost/itjiandan?useUnicode=true&characterEncoding=utf-8",
"root","root");
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
public static void close(Connection conn,Statement pre,ResultSet set){
try {
if(conn != null)conn.close();
if(pre != null)pre.close();
if(set != null)set.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
利用上传插件：commons-fileupload-1.3.jar commons-io-2.4.jar
package com.itjiandan.util;
import java.io.File;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.tomcat.util.http.fileupload.FileItem;
import org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory;
import org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload;
public class FileLoadUtil {
public static Map<String,String> fileLoad(HttpServletRequest req, String path){
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
Map<String,String> myFMap = new HashMap<String, String>();
try {
List<FileItem> items = upload.parseRequest(req);
Iterator<FileItem> iter = items.iterator();
while(iter.hasNext()){
FileItem item = iter.next();
if(item.isFormField()){
System.out.println("表单参数名:" + item.getFieldName() + "，表单参数值:" + item.getString("utf-8"));
myFMap.put(item.getFieldName(), item.getString("utf-8"));
}else{
myFMap.put("imagename", item.getName().split("\\.")[1]);
//System.out.println(item.getName().split("\\.")[1]);
File newfile = new File(path + item.getName().split("\\.")[1]);
item.write(newfile);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return myFMap;
}
}