2021-3-10-JAVA通用工具类封装
发送邮件功能、JSON解析、压缩包处理
发送邮件功能
1）依赖
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.6.0</version>
</dependency>
2）定义发送对象
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.MimeMessage;
public class MultiMimeSender {
private Transport transport;
/**
* 构建sender对象
* @param smtpHost 服务地址
* @param smtpPort 端口
* @param userName 用户名
* @param password 密码
* @param isAuth 是否开启auth验证
*/
public MultiMimeSender(String smtpHost, int smtpPort, final String userName, final String password, boolean isAuth)
throws MessagingException {
Properties props = System.getProperties();
props.put("mail.smtp.host", smtpHost);
props.put("mail.smtp.port", smtpPort);
props.put("mail.smtp.auth", isAuth);
Session session = Session.getInstance(props, new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName, password);
}
});
this.transport = session.getTransport("smtp");
}
/**
* 发送邮件
* @param mimeMessage 邮件消息对象
* @param addresses 目标地址
*/
public void doSend(MimeMessage mimeMessage, Address[] addresses) throws MessagingException {
transport.connect();
transport.sendMessage(mimeMessage, addresses);
transport.close();
}
}
3）定义工具类
package com.koal.modules.resume.util;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
import cn.hutool.core.util.ArrayUtil;
import org.apache.commons.lang.ArrayUtils;
import org.apache.commons.lang.StringUtils;
public class MailForwardUtil {
public static void forwardMail(MultiMimeSender sender,String from,String[] recipients,
String emlFilePath) throws Exception {
recipients = ArrayUtil.removeBlank(recipients);
//从文件中读取出MimeMessage对象
MimeMessage fileMessage = getMimeMessageFromFile(emlFilePath);
Multipart msgMultpart = (Multipart) fileMessage.getContent();
MimeMessage mimeMessage = new MimeMessage(Session.getInstance(new Properties()));
//基本信息
mimeMessage.setHeader("X-Mailer", "LOTONtechEmail");
mimeMessage.setSentDate(new Date());
mimeMessage.setFrom(new InternetAddress(from));
mimeMessage.setRecipients(Message.RecipientType.TO, getAdresses(recipients));
//主题
String oldSubject = getSubjectFromMimeMessage(fileMessage);
String newSubject = "转发: " + oldSubject;
mimeMessage.setSubject(newSubject);
//正文文本
MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setContent(msgMultpart);
Multipart mp = new MimeMultipart();
mp.addBodyPart(mbp1);
mimeMessage.setContent(mp,msgMultpart.getBodyPart(0).getContentType());
sender.doSend(mimeMessage,getAdresses(recipients));
}
/**
* 从eml文件中读取出MimeMessage对象
* @param emlFilePath 文件地址
*/
public static MimeMessage getMimeMessageFromFile(String emlFilePath) throws IOException, MessagingException {
return MailUtils.decodeMimeMessage(new File(emlFilePath));
}
/**
* 从MimeMessage对象中读取出主题
* @param mimeMessage MimeMessage对象
*/
public static String getSubjectFromMimeMessage(MimeMessage mimeMessage) throws Exception {
return MailUtils.getSubject(mimeMessage);
}
/**
* 发送邮件
* @param sender 邮件消息对象
* @param from 发送者
* @param recipients 接收者
* @param cc 抄送者
* @param subject 主题
* @param text 正文
* @param attachFilePaths 目标地址
*/
public static void sendMail(MultiMimeSender sender, String from, String[] recipients,String[] cc ,
String subject, String text, String[] attachFilePaths)
throws MessagingException, UnsupportedEncodingException {
MimeMessage mimeMessage = new MimeMessage(Session.getInstance(new Properties()));
recipients = ArrayUtil.removeBlank(recipients);
cc = ArrayUtil.removeBlank(cc);
//所有接收者
String[] allRecipients = (String[]) ArrayUtils.addAll(recipients,cc);
//邮件基本信息
mimeMessage.setHeader("X-Mailer", "LOTONtechEmail");
mimeMessage.setSentDate(new Date());
mimeMessage.setFrom(new InternetAddress(from));
mimeMessage.setRecipients(Message.RecipientType.TO, getAdresses(recipients));
if(cc.length>=1){
mimeMessage.setRecipients(Message.RecipientType.CC, getAdresses(cc));
}
//邮件主题
mimeMessage.setSubject(subject);
//正文文本
MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setText(text);
Multipart mp = new MimeMultipart();
mp.addBodyPart(mbp1);
//附件
if(attachFilePaths!=null){
for (String filePath : attachFilePaths) {
BodyPart filebp = new MimeBodyPart();
FileDataSource fileds = new FileDataSource(filePath);
filebp.setDataHandler(new DataHandler(fileds));
filebp.setFileName(MimeUtility.encodeText(fileds.getName()));
mp.addBodyPart(filebp);
}
}
mimeMessage.setContent(mp);
sender.doSend(mimeMessage, getAdresses(allRecipients));
}
/**
* 将字符串数组转换成地址数组
* @param strArray 字符串数组
*/
private static Address[] getAdresses(String[] strArray) throws AddressException {
ArrayList<Address> list = new ArrayList<>();
for (int i = 0; i < strArray.length; i++) {
list.add(new InternetAddress(strArray[i]));
}
return (Address[]) list.toArray(new Address[strArray.length]);
}
}
JSON解析
1）依赖
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.72</version>
</dependency>
2）工具类
package com.koal.modules.resume.util;
import com.alibaba.fastjson.JSON;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Stack;
public class JsonUtils {
/**
* 从json字符串中读取出属性值
*
* @param jsonstr json字符串
* @param key 属性，如 "result.college"
*/
public static String getValueFromJsonString(String jsonstr, String key) {
String[] stringArray = key.split("\\.");
String str = jsonstr;
try {
for (int i = 0; i < stringArray.length; i++) {
Map<?, ?> map = getMapFromJsonString(str);
str = map.get(stringArray[i]).toString();
}
} catch (Exception e) {
str = "";
}
return str;
}
/**
* 从json文件中读取出json字符串
*
* @param jsonFileDir json文件路径
*/
public static String getJsonStringFromJsonFile(String jsonFileDir) throws Exception {
String jo = null;
StringBuilder result = new StringBuilder();
// 构造一个BufferedReader类来读取文件
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(jsonFileDir), "UTF-8"));
String s = null;
while ((s = br.readLine()) != null) {
// 使用readLine方法，一次读一行
result.append(System.lineSeparator() + s);
}
br.close();
jo = result.toString();
return jo;
}
/**
* 将json字符串转换成map对象
*
* @param jsonstr json字符串
*/
private static Map<?, ?> getMapFromJsonString(String jsonstr) {
return (Map<?, ?>) JSON.parse(jsonstr);
}
/**
* 把json对象数据存储在map以键值对的形式存储，只存储叶节点
* @param stObj
* @param resultMap
*/
private static void JsonToMap(Stack<JSONObject> stObj, Map<String, Object> resultMap) throws Exception {
if(stObj == null && stObj.pop() == null){
return ;
}
JSONObject json = stObj.pop();
Iterator it = json.keys();
while(it.hasNext()){
String key = (String) it.next();
//得到value的值
Object value = json.get(key);
//System.out.println(value);
if(value instanceof JSONObject)
{
stObj.push((JSONObject)value);
//递归遍历
JsonToMap(stObj,resultMap);
}
else {
resultMap.put(key, value);
}
}
}
/**
* 把json字符串完全转换成map
* @param jsonStr json字符串
*/
public static Map<String,Object> JsonToMap(String jsonStr) throws Exception {
//转换成map对象
JSONObject obj = new JSONObject(jsonStr);
Stack<JSONObject> stObj = new Stack<JSONObject>();
stObj.push(obj);
Map<String ,Object> resultMap = new HashMap<>();
JsonToMap(stObj,resultMap);
return resultMap;
}
}
压缩包处理
1）依赖
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-compress -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.20</version>
</dependency>
2）工具类
package com.koal.modules.resume.util;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.compress.archivers.zip.*;
import org.apache.commons.compress.utils.IOUtils;
import org.apache.commons.lang.StringUtils;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
/**
* 解压Zip文件工具类
*
*/
@Slf4j
public class ZipUtils
{
public static int BUFFER_SIZE = 2048;
public static List<String> unZip(File zipfile, String destDir)
throws Exception {
if (StringUtils.isBlank(destDir)) {
destDir = zipfile.getParent();
}
destDir = destDir.endsWith(File.separator) ? destDir : destDir
+ File.separator;
ZipArchiveInputStream is = null;
List<String> fileNames = new ArrayList<String>();
try {
is = new ZipArchiveInputStream(new BufferedInputStream(
new FileInputStream(zipfile), BUFFER_SIZE),"utf8");
unzipProccess(is,fileNames,destDir);
} catch (Exception e) {
try {
log.info("解压过程：utf8报错，使用gbk");
is = new ZipArchiveInputStream(new BufferedInputStream(
new FileInputStream(zipfile), BUFFER_SIZE),"gbk");
unzipProccess(is,fileNames,destDir);
} catch (IOException exception) {
log.error("解压过程报错：" + exception);
throw exception;
}
} finally {
IOUtils.closeQuietly(is);
}
return fileNames;
}
private static void unzipProccess(ZipArchiveInputStream is, List<String> fileNames, String destDir) throws IOException {
ZipArchiveEntry entry = null;
while ((entry = is.getNextZipEntry()) != null) {
fileNames.add(entry.getName());
if (entry.isDirectory()) {
File directory = new File(destDir, entry.getName());
directory.mkdirs();
} else {
OutputStream os = null;
File entryFile = new File(destDir, entry.getName());
File path = new File(entryFile.getParent());
path.mkdirs();
try {
os = new BufferedOutputStream(new FileOutputStream(
new File(destDir, entry.getName())),
BUFFER_SIZE);
IOUtils.copy(is, os);
} finally {
IOUtils.closeQuietly(os);
}
}
}
}
/**
* 解压Zip文件
* @param zipfile 文件目录
* @param destDir 文件解压的目标目录
*/
public static List<String> unZip(String zipfile, String destDir) throws Exception {
File zipFile = new File(zipfile);
return unZip(zipFile, destDir);
}
public static void compressFiles2Zip(File[] files, String zipFilePath) {
if (files != null && files.length > 0) {
ZipArchiveOutputStream zaos = null;
File f = new File(zipFilePath);
if(f.isDirectory())
{
System.out.println("isDirectory");
return;
}
if(f.exists())
{
f.delete();
}
try {
File zipFile = new File(zipFilePath);
zaos = new ZipArchiveOutputStream(zipFile);
zaos.setUseZip64(Zip64Mode.AsNeeded);
int index = 0;
for (File file : files) {
if (file != null) {
ZipArchiveEntry zipArchiveEntry = new ZipArchiveEntry(
file, new File(file.getParent()).getName()+File.separator+file.getName());
zaos.putArchiveEntry(zipArchiveEntry);
InputStream is = null;
try {
is = new BufferedInputStream(new FileInputStream(
file));
byte[] buffer = new byte[1024 * 5];
int len = -1;
while ((len = is.read(buffer)) != -1) {
// 把缓冲区的字节写入到ZipArchiveEntry
zaos.write(buffer, 0, len);
}
// Writes all necessary data for this entry.
zaos.closeArchiveEntry();
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
if (is != null)
is.close();
}
}
}
zaos.finish();
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
try {
if (zaos != null) {
zaos.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
}
}
浙公网安备 33010602011771号