基于J2EE平臺(tái)的Web Service服務(wù)
開發(fā)方便，配置簡(jiǎn)單
- 設(shè)計(jì)接口
- 實(shí)現(xiàn)服務(wù)
- 配置暴露接口
- XFire將自動(dòng)生成對(duì)應(yīng)的wsdl
- 支持高級(jí)詳細(xì)配置
與Spring無縫集成

運(yùn)行環(huán)境

JDK 1.4+
Tomcat 4.0+ / WebLogic 8.1 （需要特殊配置，見附錄）未測(cè)試其他環(huán)境
其他包依賴參看 http://xfire.codehaus.org/Dependency+Guide

開發(fā)平臺(tái)

Eclipse WTP 1.5 平臺(tái)IDE：www.eclipse.org/webtools/
XFire 1.2.6 http://xfire.codehaus.org/Home
可以選擇安裝XFire for Eclipse插件，可以添加XFire相關(guān)類庫(kù)，根據(jù)WSDL生成代碼。http://xfire.codehaus.org/Eclipse+Plugin
JDK 1.4.2 http://java.sun.com/products/archive/
Tomcat 5.0.28 http://tomcat.apache.org/download-55.cgi#5.0.28

實(shí)施步驟

概述

建立一個(gè)Java Project用于Domain實(shí)體和Web Service接口，這個(gè)工程的輸出是一個(gè)jar包，為Web Service工程和Web Service Client共享。
建立WTP動(dòng)態(tài)WEB工程部署Web Service
建立Java Project使用Web Service (Web Service Client)

新建Java Project

建立普通Java Project 以下稱為common工程
如果使用Maven，項(xiàng)目依賴

<groupId>javax.mail</groupId>

</dependency>

普通情況需要加入如下lib

activation-1.1.jar

mail-1.4.jar

編寫類 org.ave7.xfire.domain.User

org.ave7.xfire.domain.User.java

package org.ave7.xfire.domain;

import java.io.Serializable;

import java.util.Date;

public class User implements Serializable {

private static final long serialVersionUID = 6517808321041980976L;

private Long userId;

private String accountId;

private String userName;

private Date lastLogin;

public String getAccountId() {

return accountId;

}

public void setAccountId(String accountId) {

this.accountId = accountId;

}

public Date getLastLogin() {

return lastLogin;

}

public void setLastLogin(Date lastLogin) {

this.lastLogin = lastLogin;

}

public Long getUserId() {

return userId;

}

public void setUserId(Long userId) {

this.userId = userId;

}

public String getUserName() {

return userName;

}

public void setUserName(String userName) {

this.userName = userName;

}

}

編寫接口 org.ave7.xfire.ws.UserService

org.ave7.xfire.ws.UserService.java

package org.ave7.xfire.ws;

import org.ave7.xfire.domain.User;

public
interface UserService {

public User queryUserByAccoutId(String accountId);

public
void createUser(User user);

}

新建WTP動(dòng)態(tài)WEB工程

配置WTP加入Tomcat Server Runtime
1. 選擇Windows -> Preference
2. 在左側(cè)選擇Server->Installed Runtime 添加Tomcat
新建工程，選擇Dynamic Web Project 輸入Project Name: XFireService
設(shè)置運(yùn)行環(huán)境為Dynamic Web Module 2.3 , JDK 1.4
如果需要結(jié)合Maven，請(qǐng)如下配置，否則使用默認(rèn)即可
如果使用Maven請(qǐng)注入如下依賴以及之前的Common工程，否則根據(jù)后面的列表復(fù)制lib文件到對(duì)應(yīng)目錄

<groupId>org.codehaus.xfire</groupId>

<artifactId>xfire-aegis</artifactId>

</dependency>

<groupId>org.codehaus.xfire</groupId>

<artifactId>xfire-spring</artifactId>

<groupId>xalan</groupId>

<artifactId>xalan</artifactId>

</dependency>

Lib文件列表

xbean-2.2.0.jar

qdox-1.5.jar

commons-attributes-api-2.1.jar

ant-1.5.jar

wstx-asl-3.2.0.jar

stax-utils-20040917.jar

commons-httpclient-3.0.jar

spring-1.2.6.jar

XmlSchema-1.1.jar

stax-api-1.0.1.jar

jaxen-1.1-beta-9.jar

xfire-annotations-1.2.4.jar

xfire-aegis-1.2.4.jar

xfire-core-1.2.4.jar

xfire-spring-1.2.4.jar

xfire-xmlbeans-1.2.4.jar

jdom-1.0.jar

xbean-spring-2.7.jar

wsdl4j-1.6.1.jar

commons-beanutils-1.7.0.jar

activation-1.1.jar

mail-1.4.jar

commons-codec-1.3.jar

xmlParserAPIs-2.6.2.jar

xercesImpl-2.6.2.jar

junit-3.8.1.jar

commons-logging-1.0.4.jar
xalan-2.7.0.jar

實(shí)現(xiàn)服務(wù)

org.ave7.xfire.ws.UserServiceImpl.java

package org.ave7.xfire.ws;

import java.rmi.RemoteException;

import java.util.Date;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.ave7.xfire.domain.User;

public
class UserServiceImpl implements UserService {

private
static
final Log log = LogFactory.getLog(UserServiceImpl.class);

public
void createUser(User user) throws RemoteException {

log.debug(“createUser user=” + user);

}

public User queryUserByAccoutId(String accountId) throws
RemoteException {

log.debug(“accountId=” + accountId);

User user = new User();

user.setAccountId(“testAccount”);

user.setLastLogin(new Date());

user.setUserName(“測(cè)試用戶“);

user.setUserId(new Long(123L));

return user;

}

}

利用Spring、XFire裝配與暴露服務(wù)

在web.xml配置相關(guān)組件

<?xml version=“1.0″ encoding=“UTF-8″?>

<!DOCTYPE web-app PUBLIC “-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN”
“http://java.sun.com/dtd/web-app_2_3.dtd”>

<web-app id=“WebApp_ID”>

<display-name>XFireService</display-name>

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:applicationContext*.xml</param-value>

</context-param>

<listener>

<listener-class>

org.springframework.web.context.ContextLoaderListener

</listener-class>

</listener>

<servlet>

<servlet-name>xfire</servlet-name>

<servlet-class>

org.codehaus.xfire.spring.XFireSpringServlet

</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>xfire</servlet-name>

<url-pattern>/service/*</url-pattern>

</servlet-mapping>

</web-app>

在applicationContext.xml配置相關(guān)服務(wù)

<?xml version=“1.0″ encoding=“UTF-8″?>

<!DOCTYPE beans PUBLIC “-//SPRING//DTD BEAN//EN”

“http://www.springframework.org/dtd/spring-beans.dtd”>

<beans>

<import resource=“classpath:org/codehaus/xfire/spring/xfire.xml” />

<bean id=“baseWebService”

class=“org.codehaus.xfire.spring.remoting.XFireExporter”

lazy-init=“false” abstract=“true”>

<property name=“serviceFactory” ref=“xfire.serviceFactory” />

<property name=“xfire” ref=“xfire” />

</bean>

<bean id=“userWS” class=“org.ave7.xfire.ws.UserServiceImpl”></bean>

<bean id=“userService” parent=“baseWebService”>

<property name=“serviceBean” ref=“userWS” />

<property name=“serviceClass”

value=“org.ave7.xfire.ws.UserService” />

</bean>

</beans>

測(cè)試并訪問服務(wù)

檢查lib文件夾，Maven用戶注意添加對(duì)common工程的依賴，其他情況請(qǐng)把common工程導(dǎo)出的jar包復(fù)制到web-inf/lib目錄
在WTP中添加服務(wù)器，部署應(yīng)用
在瀏覽器中輸入類似 http://localhost:8080/XFireService/service 應(yīng)看到
點(diǎn)擊wsdl http://localhost:8080/XFireService/service/UserService?wsdl 看到

如果這一步出現(xiàn)500錯(cuò)誤，請(qǐng)檢查是否有xalan.jar包
在WTP中利用Web Service Explore測(cè)試SOAP方式，在WTP工具欄選擇最右側(cè)按鈕
點(diǎn)擊右上角進(jìn)入WSDL page
點(diǎn)擊WSDL Main節(jié)點(diǎn)輸入服務(wù)wsdl地址，點(diǎn)擊
列出所有的可用服務(wù)，選擇服務(wù)測(cè)試
測(cè)試queryUserByAccountId
點(diǎn)擊結(jié)果中的Source可以看到SOAP報(bào)文

利用XFire實(shí)現(xiàn)客戶端

新建一個(gè)普通Java工程，lib中引用XFire相關(guān)包

如果使用Maven添加如下依賴以及對(duì)common工程的引用

<groupId>org.codehaus.xfire</groupId>

<artifactId>xfire-aegis</artifactId>

</dependency>

普通Java工程添加如下lib以及對(duì)common工程的引用

activation-1.1.jar

commons-codec-1.3.jar

commons-httpclient-3.0.jar

commons-logging-1.0.4.jar

jaxen-1.1-beta-9.jar

jdom-1.0.jar

junit-3.8.1.jar

mail-1.4.jar

stax-api-1.0.1.jar

stax-utils-20040917.jar

wsdl4j-1.6.1.jar

wstx-asl-3.2.0.jar

xercesImpl-2.6.2.jar

xfire-aegis-1.2.4.jar

xfire-core-1.2.4.jar

xmlParserAPIs-2.6.2.jar

XmlSchema-1.1.jar

編寫客戶端程序

org.ave7.xfire.client.MyClient.java

package org.ave7.xfire.client;

import java.net.MalformedURLException;

import java.rmi.RemoteException;

import org.ave7.xfire.domain.User;

import org.ave7.xfire.ws.UserService;

import org.codehaus.xfire.client.XFireProxyFactory;

import org.codehaus.xfire.service.Service;

import org.codehaus.xfire.service.binding.ObjectServiceFactory;

public
class MyClient {

public
static
void main(String[] args) {

try {

Service serviceModel = new ObjectServiceFactory()

.create(UserService.class);

UserService service = (UserService) new XFireProxyFactory().create(

serviceModel,

“http://localhost:8080/XFireService/service/UserService”);

User user = service.queryUserByAccoutId(“123″);

System.out

.println(“userId=” + user.getUserId() + “, userName=”

+ user.getUserName() + “, lastLogin=”

+ user.getLastLogin());

} catch (MalformedURLException e) {

e.printStackTrace();

} catch (RemoteException e) {

e.printStackTrace();

}

}

}

運(yùn)行。控制臺(tái)打印輸出

2007-8-16 10:25:52 org.codehaus.xfire.aegis.type.DefaultTypeMappingRegistry crea

teTypeCreator

信息: Couldn’t find Java 5 module on classpath. Annotation mappings will not be su

pported.

userId=123, userName=測(cè)試用戶, lastLogin=Thu Aug 16 10:25:53 CST 2007

擴(kuò)展主題

利用MTOM傳輸二進(jìn)制對(duì)象（文件）

MTOM是XFire的一個(gè)組件，可以協(xié)助利用壓縮等手段更快的在網(wǎng)絡(luò)上傳輸base64的SOAP對(duì)象

MTOM以及aegis默認(rèn)支持如下幾種java對(duì)象的數(shù)據(jù)

byte[]
javax.activation.DataHandler
javax.activation.DataSource

配置啟用MTOM

在Spring配置文件中需要MTOM的服務(wù)中加入如下配置

在客戶端編寫傳輸程序

Service serviceModel = new ObjectServiceFactory()

.create(UserService.class);

UserService service = (UserService) new XFireProxyFactory().create(

serviceModel,

“http://localhost:8080/XFireService/service/UserService”);

Client client = Client.getInstance(service);

client.setProperty(“mtom-enabled”, “true”);

client.setProperty(HttpTransport.CHUNKING_ENABLED, “true”);

User user = service.queryUserByAccoutId(“123″);

System.out

.println(“userId=” + user.getUserId() + “, userName=”

+ user.getUserName() + “, lastLogin=”

+ user.getLastLogin());

ByteArrayDataSource byteData = new ByteArrayDataSource(

“Test Sending Byte”.getBytes(), “text/plain; charset=UTF-8″);

service.transferDataSource(byteData);

附錄

XFire在WebLogic 8.1中的配置

Add the QName JAR file (qname.jar) into the WEB-INF/lib folder in your WAR file
Add a file weblogic.xml into the WEB-INF folder in your WAR file

<!DOCTYPE weblogic-web-app PUBLIC

“-//BEA Systems, Inc.//DTD Web Application 8.1//EN”

“http://www.bea.com/servers/wls810/dtd/weblogic810-web-jar.dtd”>

<weblogic-web-app>

<container-descriptor>

<prefer-web-inf-classes>true</prefer-web-inf-classes>

</container-descriptor>

</weblogic-web-app>

QName JAR file (qname.jar) http://docs.codehaus.org/download/attachments/27836/qname.jar?version=1

參考

File Transfers using SOAP XFire http://blogs.opensymphony.com/plightbo/2006/04/file_transfers_using_soap_xfir.html
XFire生火指南
http://wiki.springside.org.cn/display/springside/XFire
XFire官方網(wǎng)站
http://xfire.codehaus.org/Home

XFire On WebLogic 8.1
http://docs.codehaus.org/display/XFIRE/XFire+on+WebLogic+8.1

posted @ 2007-08-16 13:15 HIMMEL 閱讀(13567) | 評(píng)論 (10) | 編輯收藏

JSF Sucks

呃，我從來沒有這么討厭過某項(xiàng)技術(shù)，即使是面對(duì)錯(cuò)綜復(fù)雜的MFC，即使是傳說是不超過一百個(gè)人明白的DCOM。

我不明白，服務(wù)器端的程序就老大么？
為什么都跑來對(duì)JavaScript動(dòng)一堆手腳。

有人說的好，JSF就是ASP.net in JAVA。
難道把前臺(tái)后臺(tái)混為一談，提供些預(yù)定義的控件就是良好的框架么？

posted @ 2007-07-31 16:10 HIMMEL 閱讀(947) | 評(píng)論 (2) | 編輯收藏

IE BLOG 公布免費(fèi)的Develop Tool bar

http://blogs.msdn.com/ie/archive/2005/09/16/469686.aspx

一些功能列表：

explore the DOM tree and find elements on the page
disable IE settings, view information
outline elements,
control images
resize pages to common screen resolutions
validate against existing standards and provides pointers to W3C specs

下載地址
http://www.microsoft.com/downloads/details.aspx?FamilyID=e59c3964-672d-4511-bb3e-2d5e1db91038&displaylang=en

posted @ 2007-05-18 15:29 HIMMEL 閱讀(1949) | 評(píng)論 (0) | 編輯收藏

Ageci Notes: Authentication

摘要: Most of this article and degist from Ageci User Guide. CORE SecurityContextHolder, to provide any type access to the SecurityContext. SecurityContext, to hold the Authentication and... 閱讀全文

posted @ 2007-05-17 22:52 HIMMEL 閱讀(1543) | 評(píng)論 (2) | 編輯收藏

Java Notes: Data types and Operators

Comprehend

A variable holds a value, while an object reference variable points to the memory that holds the object.
The short-circuit logical operators && and || operate only on boolean operands. For example, the expression
9&&7 will not compile. Understand the difference between short-circuit logical operators and bitwise
operators.
If the first expression of a && operator is false, the second expression is not evaluated, and if the first
expression of a || operator is true, the second expression is not evaluated.

Look Out

Be on guard for words that are only slightly different from the Java keywords, such as synchronize instead of synchronized, implement instead of implements, and protect instead of protected.
Whether an array stores primitive variables or object references, the array itself is always an object.
It is illegal to include the array size in the array declaration.
Division by zero generates a runtime ArithmeticException only if the operands are integers. In case of float and double, the result of division by zero is infinity.
The result of the modulo operator always carries the sign of the first operand (i.e. the one before the operator);
you can ignore the sign of the second operand.
You cannot instantiate an enum by using the new operator.

Memorize

Know the Java language keywords.
Know the range of values for all primitive data types.
All primitive data types except boolean and char are signed.
The first character of an identifier must be a letter, a dollar sign ($), or an underscore (_). Characters other than the first character in an identifier may be a letter, a dollar sign, an underscore, or a digit.

posted @ 2007-05-17 22:48 HIMMEL 閱讀(872) | 評(píng)論 (0) | 編輯收藏

Java Notes: Classes, Methods, and Interface

Comprehend

The method name and return type are mandatory in a method declaration. Even though you are not required to specify a modifier in a method declaration, the default modifier is assigned to the method, if you don’t declare one.
A static variable belongs to the class and not to a particular instance of the class, and therefore is initialized when the class is loaded, and before the class is instantiated.
Because a static method belongs to a class and not to a particular instance of the class, it cannot access the nonstatic methods and variables of the class in which it is defined.
An instance of an inner class can only exist in an instance of the outer class, and has direct access to all the instance variables and methods of the outer instance.
If you make a super call or a this call, it must be in the beginning of a constructor. That means you can make either a super call or a this call, but not both.

Look Out

The variable-length parameters list must appear last in the parentheses of a method and it consists of a data type, three dots, and a name, in that order.
A Java class cannot inherit from more than one class, but it can inherit from one class and one or more interfaces.
The class that inherits from an interface must provide implementation for all the methods that are declared in the interface if the class is not abstract.
An interface can extend another interface but it cannot implement another interface or a class.

Memorize

If you do not provide any constructor for a class you write, the compiler provides the default constructor for that class. If you write at least one constructor for the class, the compiler provides no constructor.
If you don not make a this or a super call in the beginning of a constructor, the compiler places a super() call there.
You use the keyword extends to write a derived class that inherits from a parent class, and use the keyword implements to write a class that inherits from an interface.
The methods in an interface are inherently public and abstract, and the variables in the interface are inherently public, final, and static.

posted @ 2007-05-17 22:47 HIMMEL 閱讀(983) | 評(píng)論 (0) | 編輯收藏

Microsoft Software Basic Process

Plan an agenda.
Define key business drivers.
Define key success facts.
Work out persona.
Work out Scenario.
High level architecture
High level design
Development
QA
Deployment

posted @ 2007-05-17 22:37 HIMMEL 閱讀(686) | 評(píng)論 (0) | 編輯收藏

數(shù)值方法筆記1

關(guān)于這個(gè)筆記

也許你已經(jīng)學(xué)會(huì)了一門計(jì)算機(jī)語言，也許你會(huì)寫一段不錯(cuò)的程序。

也許你在嘈雜的環(huán)境用不費(fèi)力的就可以用熟悉的IDE完成一個(gè)項(xiàng)目。

不過，你還在用+ - * /和%做所有的計(jì)算么？

這個(gè)筆記就是為了寫出更加正確的程序，小小的一個(gè)學(xué)習(xí)過程。

我不總結(jié)復(fù)雜的道理，只記錄用得上的方案。

出現(xiàn)的一切代碼都使用Java語言。

正確的計(jì)算過程導(dǎo)致錯(cuò)誤的計(jì)算結(jié)果

關(guān)于基本數(shù)值計(jì)算中的一些陷阱

浮點(diǎn)數(shù)和實(shí)數(shù)

當(dāng)早期的Fortran和algol創(chuàng)造出real這個(gè)關(guān)鍵字時(shí)，你還真以為那么是實(shí)數(shù)，不過說真的，你被騙了。

所以到了C，我們擁有了float。

那么他們到底有什么不同呢？

簡(jiǎn)單地說

System.out.println(”Value of 1/3: ” + (1/3f))

將輸出

Value of 1/3: 0.33333334

很簡(jiǎn)單，這是很早之前您就知道的四舍五入。當(dāng)時(shí)我們只是那無法寫完的循環(huán)在紙上劃下一個(gè)”≈”，然后非常開心可以少寫幾個(gè)字符。如果你有一個(gè)負(fù)責(zé)任的數(shù)學(xué)老師，他（她）就會(huì)反復(fù)的叮嚀你，要小心，計(jì)算時(shí)候要保留結(jié)果精度往后一位的數(shù)值。

當(dāng)這一切輪到了計(jì)算機(jī)，我們叫它：

舍入誤差

舍入誤差有時(shí)相當(dāng)驚人。對(duì)1/3連加840次，你會(huì)得到279.9915（本應(yīng)當(dāng)為280），如何驚人，我們會(huì)在下面看到。

不過有意思的事情，和小時(shí)候的情形不一樣，舍入誤差并不是由于不能除盡或者是無理數(shù)造成的，類似于1/5的數(shù)字連加之后也有誤差。這是因?yàn)榻^大多數(shù) 計(jì)算機(jī)是基于2進(jìn)制體系的，所以IBM有用于商業(yè)計(jì)算的10進(jìn)制計(jì)算機(jī)。簡(jiǎn)單的事實(shí)是利用float表達(dá)的2的冪次，在精度范圍是沒有舍入誤差的。

給出常用定義：

作如下計(jì)算，你會(huì)期待怎樣的結(jié)果呢？

別偷懶，用你久遠(yuǎn)的口算能力，很容易就可以得出，它本來應(yīng)該是0。而事實(shí)上，我們偉大的計(jì)算機(jī)的答案是3222784.0

為什么？

因?yàn)椋?0000001/20000000的時(shí)候，答案本應(yīng)該是0.50000005，由于舍入誤差，我們得到了0.5000006。

接下來我們減去0.5的時(shí)候，得到的應(yīng)當(dāng)是0.00000006，這樣，我們就丟失了所有的正確的數(shù)。

更糟糕的是，計(jì)算機(jī)中實(shí)際得到的值是5.9604645e-8。

因此，您的存款戶頭上可能會(huì)平白無故減少3222784元。只因?yàn)殂y行決定向你支付利息之后，調(diào)整了匯率。

呃，這一次，我們叫它：

相消誤差——兩個(gè)非常相近的值相減時(shí)，如果消去了絕大多數(shù)有效數(shù)值，那么就會(huì)發(fā)生相消誤差。
舍入誤差——是精確值和其可表達(dá)值之間的差值。

如果還有什么要說的，那就是：

Double比float 更接近實(shí)數(shù)，貌似不需要我說。
浮點(diǎn)運(yùn)算不遵守代數(shù)定理

比如：a = 1.0, b = 3.0e-8, c = 4.0e-8

那么： (a+b)+c = 1.0

a+(b+c) = 1.0000001

不過加法和乘法還是滿足交換律的。

下一次：輪到了整數(shù)。

posted @ 2007-05-17 22:34 HIMMEL 閱讀(1045) | 評(píng)論 (0) | 編輯收藏

JavaMail API 實(shí)例匯總

呃，好吧，我只寫過三個(gè)JavaMail的程序。

都是批量郵件守護(hù)程序。決定總結(jié)一下，希望非常幸運(yùn)找到這篇文章的人不會(huì)再對(duì)這個(gè)困惑。

必須明白的基礎(chǔ)知識(shí)

STMP協(xié)議是如何工作的
協(xié)議的標(biāo)準(zhǔn)在這里 http://www.ietf.org/rfc/rfc2821.txt?number=2821
下面是扼要說明（http://www.freesoft.org/CIE/Topics/94.htm ）：

Simple Mail Transfer Protocol (SMTP), documented in RFC 821, is Internet’s standard host-to-host mail transport protocol and traditionally operates over TCP, port 25. In other words, a UNIX user can type telnet hostname 25 and connect with an SMTP server, if one is present.

SMTP uses a style of asymmetric request-response protocol popular in the early 1980s, and still seen occasionally, most often in mail protocols. The protocol is designed to be equally useful to either a computer or a human, though not too forgiving of the human. From the server’s viewpoint, a clear set of commands is provided and well-documented in the RFC. For the human, all the commands are clearly terminated by newlines and a HELP command lists all of them. From the sender’s viewpoint, the command replies always take the form of text lines, each starting with a three-digit code identifying the result of the operation, a continuation character to indicate another lines following, and then arbitrary text information designed to be informative to a human.

事實(shí)上，你可以像使用DOS命令一樣發(fā)送電子郵件。http://bbs.stcore.com/archiver/tid-8024.htm 當(dāng)然因?yàn)楦鞣N原因，你的嘗試不可能成功。事實(shí)上SMTP工作的時(shí)候就是簡(jiǎn)單的發(fā)送命令。取得認(rèn)證，發(fā)送數(shù)據(jù)。得到反饋。確認(rèn)退出這么簡(jiǎn)單。
SMTP中用于發(fā)送的數(shù)據(jù)
SMTP中發(fā)送的數(shù)據(jù)，遵從Multipurpose Internet Mail Extensions (MIME)標(biāo)準(zhǔn)，呃，我不得不說，這是這個(gè)星球上最重要的標(biāo)準(zhǔn)之一。所有的互聯(lián)網(wǎng)通信基本都是基于這個(gè)標(biāo)準(zhǔn)的演化。除了電子郵件，常見的應(yīng)用還包括HTTP報(bào)文等（也就是所有網(wǎng)頁了），另外即使在20年后發(fā)展的XML，其2進(jìn)制數(shù)據(jù)發(fā)送仍然實(shí)用的MIME中的編碼方式。
恩，這里就涉及到郵件附件如何處理的問題。恩，簡(jiǎn)單地說就是BASE64編碼

Table 1: The Base64 Alphabet

Value Encoding  Value Encoding  Value Encoding  Value Encoding

0 A            17 R            34 i            51 z

1 B            18 S            35 j            52 0

2 C            19 T            36 k            53 1

3 D            20 U            37 l            54 2

4 E            21 V            38 m            55 3

5 F            22 W            39 n            56 4

6 G            23 X            40 o            57 5

7 H            24 Y            41 p            58 6

8 I            25 Z            42 q            59 7

9 J            26 a            43 r            60 8

10 K            27 b            44 s            61 9

11 L            28 c            45 t            62 +

12 M            29 d            46 u            63 /

13 N            30 e            47 v

14 O            31 f            48 w         (pad) =

15 P            32 g            49 x

16 Q            33 h            50 y

在這種編碼中，我們將字符或者二進(jìn)制編碼以6個(gè)比特位為一組，替換成相應(yīng)的字符形式。比如

100110111010001011101001

轉(zhuǎn)換結(jié)果就是

100110 -> 38

111010 -> 58

001011 -> 11

101001 -> 41

38 -> m

58 -> 6

11 -> L

41 -> p

m6Lp

于是，我們就可以以文本的方式編碼二進(jìn)制流以及擴(kuò)展ASCII字符，比如中文字符。

基礎(chǔ)知識(shí)完畢，下面是FAQ

Java發(fā)送電子郵件需要哪些軟件包

mail.jar 通常還會(huì)需要 activation.jar

下載地址
http://java.sun.com/products/javabeans/jaf/downloads/index.html
https://maven-repository.dev.java.net/nonav/repository/javax.mail/

如何發(fā)送郵件

關(guān)于：

如何發(fā)送郵件
如何發(fā)送帶有附件的郵件
如何發(fā)送中文郵件
郵件中文標(biāo)題亂碼怎么辦
郵件附件亂碼怎么辦等等問題

請(qǐng)查看以下代碼

	public static synchronized void sendMail(Properties settings)
 
 		throws Exception {
 
 	Properties props = new Properties();
 
 	props.put("mail.smtp.host", settings.get(StartCore.MAIL_SERVER));
 
 	props.put("mail.smtp.user", settings.get(StartCore.USER_NAME));
 
 	props.put("mail.smtp.auth", "true");
 
//SMTP服務(wù)器用戶驗(yàn)證
 
 	Authenticator auth = new SMTPAuthenticator((String) settings
 
 		.get(StartCore.USER_NAME), (String) settings
 
 		.get(StartCore.PASSWORD));
 
 	Session session = Session.getDefaultInstance(props, auth);
 
if ("true".compareToIgnoreCase((String) settings.get("DEBUG")) == 0) {
 
 		session.setDebug(true);
 
 	}
 
//創(chuàng)建消息體
 
 	MimeMessage msg = new MimeMessage(session);
 
//設(shè)置發(fā)送人郵件
 
 	msg.setFrom(new InternetAddress((String) settings
 
 		.get(StartCore.USER_MAIL)));
 
//設(shè)置接收人郵件
 
 	address = new InternetAddress[] { new InternetAddress(rs
 
 		.getString("GRE_mail")) };
 
 	msg.setRecipients(Message.RecipientType.TO, address);
 
//設(shè)置主題，中文編碼
 
 	msg.setSubject(subject, "gbk");
 
 	msg.setSentDate(new Date());
 
String content = "郵件正文";
 
 	MimeBodyPart mbp1 = new MimeBodyPart();
 
 	mbp1.setText(content, "gbk");
 
//郵件附件
 
MimeBodyPart attachFilePart = new MimeBodyPart();
 
File file = new File("中文附件.txt");
 
FileDataSource fds = new FileDataSource(file.getName());
 
attachFilePart.setDataHandler(new DataHandler(fds));
 
 	sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
 
 	//解決中文附件名稱
 
 	attachFilePart.setFileName("=?gbk?B?"
 
 		+ enc.encode(file.getName().getBytes("gbk")) + "?=");
 
Multipart mp = new MimeMultipart();
 
 	mp.addBodyPart(mbp1);
 
 	mp.addBodyPart(attachFilePart);
 
msg.setContent(mp);
 
// send the message
 
 	msg.saveChanges();
 
 	Transport.send(msg);
 
}

這是上面用戶驗(yàn)證用到的類

class SMTPAuthenticator extends javax.mail.Authenticator {

	private String username;
 
	private String password;
 
	/**
 
  	* @param username
 
 	* @param password
 
  	*/
 
 	public SMTPAuthenticator(String username, String password) {
 
 		this.username = username;
 
 		this.password = password;
 
	}
 
	public PasswordAuthentication getPasswordAuthentication() {
 
 		return new PasswordAuthentication(username, password);
 
 	}
 
}

郵件發(fā)送出錯(cuò)

What causes an “javax.activation.UnsupportedDataTypeException: no object DCH for MIME type xxx/xxxx javax.mail.MessagingException: IOException while sending message;” to be sent and how do I fix this? [This happens for known MIME types like text/htm

事實(shí)上這個(gè)是郵件發(fā)送時(shí)驗(yàn)證組件設(shè)置不當(dāng)引起的，這個(gè)組件配置方法如下

(http://java.sun.com/j2ee/1.4/docs/api/javax/activation/MailcapCommandMap.html)

The MailcapCommandMap looks in various places in the user’s system for mailcap file entries. When requests are made to search for commands in the MailcapCommandMap, it searches mailcap files in the following order:

1) Programatically added entries to the MailcapCommandMap instance.
2) The file .mailcap in the user’s home directory.
3) The file /lib/mailcap.
4) The file or resources named META-INF/mailcap.
5) The file or resource named META-INF/mailcap.default (usually found only in the activation.jar file).

我選用了第四種方法，在生成的Jar文件中加入了 META-INF/mailcap.

#
# This is a very simple 'mailcap' file
#
image/gif;;		x-java-view=com.sun.activation.viewers.ImageViewer
image/jpeg;;		x-java-view=com.sun.activation.viewers.ImageViewer
text/*;;		x-java-view=com.sun.activation.viewers.TextViewer
text/*;;		x-java-edit=com.sun.activation.viewers.TextEditor
text/html;; 	x-java-content-handler=com.sun.mail.handlers.text_html
text/xml;; 		x-java-content-handler=com.sun.mail.handlers.text_xml
text/plain;; 	x-java-content-handler=com.sun.mail.handlers.text_plain
multipart/*;; 	x-java-content-handler=com.sun.mail.handlers.multipart_mixed
message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822

posted @ 2007-05-17 22:30 HIMMEL 閱讀(3864) | 評(píng)論 (1) | 編輯收藏

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運(yùn)行環(huán)境

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新建Java Project

新建WTP動(dòng)態(tài)WEB工程

實(shí)現(xiàn)服務(wù)

利用Spring、XFire裝配與暴露服務(wù)

測(cè)試并訪問服務(wù)

利用XFire實(shí)現(xiàn)客戶端

擴(kuò)展主題

利用MTOM傳輸二進(jìn)制對(duì)象（文件）

附錄

XFire在WebLogic 8.1中的配置

參考

Comprehend

Look Out

Memorize

Comprehend

Look Out

Memorize

關(guān)于這個(gè)筆記

正確的計(jì)算過程導(dǎo)致錯(cuò)誤的計(jì)算結(jié)果

浮點(diǎn)數(shù)和實(shí)數(shù)

必須明白的基礎(chǔ)知識(shí)

Java發(fā)送電子郵件需要哪些軟件包

如何發(fā)送郵件

郵件發(fā)送出錯(cuò)

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