目标：php
基于契约优先的webservice功能开发html
服务端java
1、编写xsd和wsdl文件（validate必需要经过，注意命名空间要一致），放到WEB-INF/wsdl目录下web
2、项目中引入jaxws-ri的相关jar包；WEB-INF下增长sun-jaxws.xml（配置服务的实现类）；在web.xml中配置jaxws-ri提供的监听器WSServletContextListener；在web.xml中配置jaxws-ri提供的Servlet：WSServlet浏览器
3、使用wsimport命令将本地wsdl转换为java文件，拷贝服务接口源文件到服务端（删除@XmlSeeAlso({ObjectFactory.class}) ，将异常类改成自定义的异常---该异常应该继承自Exception，若是是runtimeexception，服务端也会抛出异常）tomcat
4、编写实现类，配置一些注解endpointInterface，wsdlLocation，targetNamespace，serviceName，portName等app
5、部署项目到tomcat并启动。eclipse
备注：在wsdl中经过include或者import引入xsd文件，经过wsimport获取服务端的接口以及客户端生成的java文件，有可能会出现问题，如，客户端调用list()在服务端返回时有对象，可是客户端获取到的就是null。jsp
若是将schema的定义所有放到wsdl中，客户端访问webservice的list()就不会出现问题。这是怎么回事呢？ide
若是都正常了，则能够将schema的定义单独放到xsd文件中，又没事了！因此，先将schema的定义放到wsdl中，这样经过wsdl生成的客户端代码才能与服务端顺利的进行沟通！若是分离开，启动服务，生成的客户端代码调用服务是有问题的，切记！！！
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://service.hqh.com" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="UserService" targetNamespace="http://service.hqh.com"> <wsdl:types> <!-- <xsd:schema targetNamespace="http://service.hqh.com"> <xsd:include schemaLocation="user.xsd"/> </xsd:schema> --> <!-- <xsd:schema> <xsd:import namespace="http://service.hqh.com" schemaLocation="user.xsd" /> </xsd:schema> --> <xsd:schema targetNamespace="http://service.hqh.com"> <xsd:element name="add" type="tns:add" /> <xsd:element name="addResponse" type="tns:addResponse" /> <xsd:element name="delete" type="tns:delete" /> <xsd:element name="deleteResponse" type="tns:deleteResponse" /> <xsd:element name="list" type="tns:list" /> <xsd:element name="listResponse" type="tns:listResponse" /> <xsd:element name="login" type="tns:login" /> <xsd:element name="loginResponse" type="tns:loginResponse" /> <xsd:element name="UserException" type="tns:UserException"></xsd:element> <xsd:complexType name="UserException"> <xsd:sequence> <xsd:element name="error" type="xsd:string" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="add"> <xsd:sequence> <xsd:element name="user" type="tns:user" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="addResponse"> <xsd:sequence /> </xsd:complexType> <xsd:complexType name="delete"> <xsd:sequence> <xsd:element name="id" type="xsd:int"></xsd:element> </xsd:sequence> </xsd:complexType> <xsd:complexType name="deleteResponse"> <xsd:sequence /> </xsd:complexType> <xsd:complexType name="list"> <xsd:sequence /> </xsd:complexType> <xsd:complexType name="listResponse"> <xsd:sequence minOccurs="1" maxOccurs="unbounded"> <xsd:element name="users" type="tns:user" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="login"> <xsd:sequence> <xsd:element name="name" type="xsd:string" /> <xsd:element name="pwd" type="xsd:string" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="loginResponse"> <xsd:sequence> <xsd:element name="user" type="tns:user" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="user"> <xsd:sequence> <xsd:element name="id" type="xsd:int" /> <xsd:element name="name" type="xsd:string" /> <xsd:element name="pwd" type="xsd:string" /> </xsd:sequence> </xsd:complexType> </xsd:schema> </wsdl:types> <!-- 添加异常 消息 --> <wsdl:message name="UserException"> <wsdl:part name="fault" element="tns:UserException" /> </wsdl:message> <wsdl:message name="add"> <wsdl:part element="tns:add" name="parameters" /> </wsdl:message> <wsdl:message name="addResponse"> <wsdl:part element="tns:addResponse" name="parameters" /> </wsdl:message> <wsdl:message name="delete"> <wsdl:part element="tns:delete" name="parameters" /> </wsdl:message> <wsdl:message name="deleteResponse"> <wsdl:part element="tns:deleteResponse" name="parameters" /> </wsdl:message> <wsdl:message name="list"> <wsdl:part element="tns:list" name="parameters" /> </wsdl:message> <wsdl:message name="listResponse"> <wsdl:part element="tns:listResponse" name="parameters" /> </wsdl:message> <wsdl:message name="login"> <wsdl:part element="tns:login" name="parameters" /> </wsdl:message> <wsdl:message name="loginResponse"> <wsdl:part element="tns:loginResponse" name="parameters" /> </wsdl:message> <!-- 指定接口和方法 --> <wsdl:portType name="IUserService"> <wsdl:operation name="add"> <wsdl:input message="tns:add" /> <wsdl:output message="tns:addResponse" /> <!-- 异常 --> <wsdl:fault name="UserException" message="tns:UserException"></wsdl:fault> </wsdl:operation> <wsdl:operation name="delete"> <wsdl:input message="tns:delete" /> <wsdl:output message="tns:deleteResponse" /> </wsdl:operation> <wsdl:operation name="list"> <wsdl:input message="tns:list" /> <wsdl:output message="tns:listResponse" /> </wsdl:operation> <wsdl:operation name="login"> <wsdl:input message="tns:login" /> <wsdl:output message="tns:loginResponse" /> <!-- 异常 --> <wsdl:fault name="UserException" message="tns:UserException"></wsdl:fault> </wsdl:operation> </wsdl:portType> <!-- 编码格式 --> <wsdl:binding name="userServiceSOAP" type="tns:IUserService"> <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" /> <wsdl:operation name="add"> <wsdl:input> <soap:body use="literal" /> </wsdl:input> <wsdl:output> <soap:body use="literal" /> </wsdl:output> <!-- 异常 --> <wsdl:fault name="UserException"> <soap:fault name="UserException" use="literal" /> </wsdl:fault> </wsdl:operation> <wsdl:operation name="delete"> <wsdl:input> <soap:body use="literal" /> </wsdl:input> <wsdl:output> <soap:body use="literal" /> </wsdl:output> </wsdl:operation> <wsdl:operation name="list"> <wsdl:input> <soap:body use="literal" /> </wsdl:input> <wsdl:output> <soap:body use="literal" /> </wsdl:output> </wsdl:operation> <wsdl:operation name="login"> <wsdl:input> <soap:body use="literal" /> </wsdl:input> <wsdl:output> <soap:body use="literal" /> </wsdl:output> <!-- 异常 --> <wsdl:fault name="UserException"> <soap:fault name="UserException" use="literal" /> </wsdl:fault> </wsdl:operation> </wsdl:binding> <!-- 服务 --> <wsdl:service name="UserService"> <wsdl:port binding="tns:userServiceSOAP" name="userServicePort"> <!-- 经过jaxws-ri.jax中的servlet对访问进行监听，这里配置的地址很关键，根目录后跟servlet的url-pattern，保持一致 --> <soap:address location="http://localhost:8080/Demo/service" /> </wsdl:port> </wsdl:service> </wsdl:definitions>
客户端
1、客户端经过服务端发布的地址获得wsdl并使用wsdl转换为java文件。
2、客户端将全部转换的java文件拷贝至项目中（字节码文件不要拷贝到项目中，不然启动会报错）
3、获取port，访问服务端对外公布的方法
须要注意的地方：
服务端的接口文件，来源：经过本地wsdl文件使用wsimport命令转换而来
客户端的java文件，来源：服务端启动服务，经过可访问的url地址使用wsimport命令转换而来
服务端与客户端的版本必须保持一致，即服务端一旦有变化，客户端使用的访问服务端的java文件必须根据新的wsdl来生成，不然访问服务端的方法有可能得不到正确的返回值！！！
尽可能保持命名的一致性，不少地方是有对应关系的，不能一边大写一边小写
服务端
1.将编写好的user.xsd和user.wsdl文件放到WEB-INF/wsdl目录下
<?xml version="1.0" encoding="UTF-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://service.hqh.com" xmlns:tns="http://service.hqh.com" elementFormDefault="qualified"> <xsd:element name="add" type="tns:add" /> <xsd:element name="addResponse" type="tns:addResponse" /> <xsd:element name="delete" type="tns:delete" /> <xsd:element name="deleteResponse" type="tns:deleteResponse" /> <xsd:element name="list" type="tns:list" /> <xsd:element name="listResponse" type="tns:listResponse" /> <xsd:element name="login" type="tns:login" /> <xsd:element name="loginResponse" type="tns:loginResponse" /> <xsd:element name="UserException" type="tns:UserException"></xsd:element> <xsd:complexType name="UserException"> <xsd:sequence> <xsd:element name="error" type="xsd:string"/> </xsd:sequence> </xsd:complexType> <xsd:complexType name="add"> <xsd:sequence> <xsd:element name="user" type="tns:user" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="addResponse"> <xsd:sequence /> </xsd:complexType> <xsd:complexType name="delete"> <xsd:sequence> <xsd:element name="id" type="xsd:int"></xsd:element> </xsd:sequence> </xsd:complexType> <xsd:complexType name="deleteResponse"> <xsd:sequence /> </xsd:complexType> <xsd:complexType name="list"> <xsd:sequence /> </xsd:complexType> <xsd:complexType name="listResponse"> <xsd:sequence minOccurs="1" maxOccurs="unbounded"> <xsd:element name="users" type="tns:user"/> </xsd:sequence> </xsd:complexType> <xsd:complexType name="login"> <xsd:sequence> <xsd:element name="name" type="xsd:string" /> <xsd:element name="pwd" type="xsd:string" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="loginResponse"> <xsd:sequence> <xsd:element name="user" type="tns:user" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="user"> <xsd:sequence> <xsd:element name="id" type="xsd:int" /> <xsd:element name="name" type="xsd:string" /> <xsd:element name="pwd" type="xsd:string" /> </xsd:sequence> </xsd:complexType> </xsd:schema>
<?xml version="1.0" encoding="UTF-8" standalone="no"?> <wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://service.hqh.com" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="UserService" targetNamespace="http://service.hqh.com"> <wsdl:types> <!-- <xsd:schema targetNamespace="http://service.hqh.com"> <xsd:include schemaLocation="user.xsd"/> </xsd:schema> --> <!-- --> <xsd:schema> <xsd:import namespace="http://service.hqh.com" schemaLocation="user.xsd" /> </xsd:schema> </wsdl:types> <!-- 添加异常 消息 --> <wsdl:message name="UserException"> <wsdl:part name="fault" element="tns:UserException" /> </wsdl:message> <wsdl:message name="add"> <wsdl:part element="tns:add" name="parameters" /> </wsdl:message> <wsdl:message name="addResponse"> <wsdl:part element="tns:addResponse" name="parameters" /> </wsdl:message> <wsdl:message name="delete"> <wsdl:part element="tns:delete" name="parameters" /> </wsdl:message> <wsdl:message name="deleteResponse"> <wsdl:part element="tns:deleteResponse" name="parameters" /> </wsdl:message> <wsdl:message name="list"> <wsdl:part element="tns:list" name="parameters" /> </wsdl:message> <wsdl:message name="listResponse"> <wsdl:part element="tns:listResponse" name="parameters" /> </wsdl:message> <wsdl:message name="login"> <wsdl:part element="tns:login" name="parameters" /> </wsdl:message> <wsdl:message name="loginResponse"> <wsdl:part element="tns:loginResponse" name="parameters" /> </wsdl:message> <!-- 指定接口和方法 --> <wsdl:portType name="IUserService"> <wsdl:operation name="add"> <wsdl:input message="tns:add" /> <wsdl:output message="tns:addResponse" /> <!-- 异常 --> <wsdl:fault name="UserException" message="tns:UserException"></wsdl:fault> </wsdl:operation> <wsdl:operation name="delete"> <wsdl:input message="tns:delete" /> <wsdl:output message="tns:deleteResponse" /> </wsdl:operation> <wsdl:operation name="list"> <wsdl:input message="tns:list" /> <wsdl:output message="tns:listResponse" /> </wsdl:operation> <wsdl:operation name="login"> <wsdl:input message="tns:login" /> <wsdl:output message="tns:loginResponse" /> <!-- 异常 --> <wsdl:fault name="UserException" message="tns:UserException"></wsdl:fault> </wsdl:operation> </wsdl:portType> <!-- 编码格式 --> <wsdl:binding name="userServiceSOAP" type="tns:IUserService"> <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" /> <wsdl:operation name="add"> <wsdl:input> <soap:body use="literal" /> </wsdl:input> <wsdl:output> <soap:body use="literal" /> </wsdl:output> <!-- 异常 --> <wsdl:fault name="UserException"> <soap:fault name="UserException" use="literal" /> </wsdl:fault> </wsdl:operation> <wsdl:operation name="delete"> <wsdl:input> <soap:body use="literal" /> </wsdl:input> <wsdl:output> <soap:body use="literal" /> </wsdl:output> </wsdl:operation> <wsdl:operation name="list"> <wsdl:input> <soap:body use="literal" /> </wsdl:input> <wsdl:output> <soap:body use="literal" /> </wsdl:output> </wsdl:operation> <wsdl:operation name="login"> <wsdl:input> <soap:body use="literal" /> </wsdl:input> <wsdl:output> <soap:body use="literal" /> </wsdl:output> <!-- 异常 --> <wsdl:fault name="UserException"> <soap:fault name="UserException" use="literal" /> </wsdl:fault> </wsdl:operation> </wsdl:binding> <!-- 服务 --> <wsdl:service name="UserService"> <wsdl:port binding="tns:userServiceSOAP" name="userServicePort"> <!-- 经过jaxws-ri.jax中的servlet对访问进行监听，这里配置的地址很关键，根目录后跟servlet的url-pattern，保持一致 --> <soap:address location="http://localhost:8080/Demo/service" /> </wsdl:port> </wsdl:service> </wsdl:definitions>
2.项目中引入jaxws-ri压缩包下的lib包中的jar
3.WEB-INF下新建一个sun-jaxws.xml
<?xml version="1.0" encoding="UTF-8"?> <endpoints xmlns="http://java.sun.com/xml/ns/jax-ws/ri/runtime" version="2.0"> <!-- name配置服务的名称 implementation配置对应的实现类 url-pattern配置浏览器中访问本服务的地址--> <endpoint name="UserService" implementation="com.hqh.service.UserServiceImpl" url-pattern="/service"/> </endpoints>
4.配置web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <!-- 配置webservice，使用 jaxws-ri.jar 进行支持--> <!-- 监听器 --> <listener> <!-- 引入jaxws-ri.jar中的监听器 --> <listener-class>com.sun.xml.ws.transport.http.servlet.WSServletContextListener</listener-class> </listener> <servlet> <!-- servlet-name与sun-jaxws.xml中的name一致 --> <servlet-name>UserService</servlet-name> <!-- 使用jaxws-ri.jar中的servlet --> <servlet-class>com.sun.xml.ws.transport.http.servlet.WSServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>UserService</servlet-name> <!-- servlet-name与sun-jaxws.xml中的url-pattern一致 --> <url-pattern>/service</url-pattern> </servlet-mapping> </web-app>
使用wsimort将本地wsdl文件转换为java文件
wsimport -d destination_folder -keep xxx.wsdl
5.接口(事先已经编写好wsdl文件，经过wsimport能够将其转换为java文件，此时将转换后的接口文件拷贝到项目中做为接口使用，因为已经在接口中定义好了各类注解，因此可以很好的帮助完成服务于wsdl的映射)
package com.hqh.service;
import java.util.List;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;
import javax.xml.bind.annotation.XmlSeeAlso;
import javax.xml.ws.RequestWrapper;
import javax.xml.ws.ResponseWrapper;
import com.hqh.model.User;
/**
* This class was generated by the JAX-WS RI.
* JAX-WS RI 2.1.6 in JDK 6
* Generated source version: 2.1
*
*/
@WebService(name = "IUserService", targetNamespace = "http://service.hqh.com")
public interface IUserService {
/**
*
* @param user
* @throws UserException_Exception
*/
@WebMethod
@RequestWrapper(localName = "add", targetNamespace = "http://service.hqh.com", className = "com.hqh.service.Add")
@ResponseWrapper(localName = "addResponse", targetNamespace = "http://service.hqh.com", className = "com.hqh.service.AddResponse")
public void add(
@WebParam(name = "user", targetNamespace = "")
User user)
throws UserException
;
/**
*
* @param id
*/
@WebMethod
@RequestWrapper(localName = "delete", targetNamespace = "http://service.hqh.com", className = "com.hqh.service.Delete")
@ResponseWrapper(localName = "deleteResponse", targetNamespace = "http://service.hqh.com", className = "com.hqh.service.DeleteResponse")
public void delete(
@WebParam(name = "id", targetNamespace = "")
int id);
/**
*
* @return
* returns java.util.List<com.hqh.service.User>
*/
@WebMethod
@WebResult(name = "users", targetNamespace = "")
@RequestWrapper(localName = "list", targetNamespace = "http://service.hqh.com", className = "com.hqh.service.List")
@ResponseWrapper(localName = "listResponse", targetNamespace = "http://service.hqh.com", className = "com.hqh.service.ListResponse")
public List<User> list();
/**
*
* @param pwd
* @param name
* @return
* returns com.hqh.service.User
* @throws UserException_Exception
*/
@WebMethod
@WebResult(name = "user", targetNamespace = "")
@RequestWrapper(localName = "login", targetNamespace = "http://service.hqh.com", className = "com.hqh.service.Login")
@ResponseWrapper(localName = "loginResponse", targetNamespace = "http://service.hqh.com", className = "com.hqh.service.LoginResponse")
public User login(
@WebParam(name = "name", targetNamespace = "")
String name,
@WebParam(name = "pwd", targetNamespace = "")
String pwd)
throws UserException
;
}
6.实现类
package com.hqh.service;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.jws.WebService;
import com.hqh.model.User;
/**必须指定targetNamespace，不然服务没法启动*/
/*file:/E:/technology-hqh/proj/webservice/JAX-WS/Demo/build/classes/META-INF/wsdl/user.wsdl
has the following services [{http://service.hqh.com}UserService]
but not {http://service.hqh.com/}UserService.
Maybe you forgot to specify a service name in @WebService/@WebServiceProvider?*/
@WebService(endpointInterface="com.hqh.service.IUserService",
wsdlLocation="WEB-INF/wsdl/user.wsdl",
serviceName="UserService",
portName="userServicePort",
targetNamespace="http://service.hqh.com")
public class UserServiceImpl implements IUserService {
private static List<User> users = new ArrayList<User>();
static {
users.add(new User(1,"zs","zs"));
}
@Override
public void add(User user) throws UserException{
for(User u:users) {
if(u.getName().equals(user.getName())) {
throw new UserException("用户已存在!",null);
}
}
users.add(user);
}
@Override
public void delete(int id) {
for (Iterator iterator = users.iterator(); iterator.hasNext();) {
User user = (User) iterator.next();
if(id==user.getId()) {
users.remove(user);
break;
}
}
}
@Override
public List<User> list() {
return users;
}
@Override
public User login(String name, String pwd) throws UserException{
for(User user : users) {
if(name.equals(user.getName()) && pwd.equals(user.getPwd())) {
return user;
}
}
throw new UserException("用户不存在",null);
}
}
模型
package com.hqh.model;
public class User {
private int id;
private String name;
private String pwd;
public User() {
super();
}
public User(int id, String name, String pwd) {
super();
this.id = id;
this.name = name;
this.pwd = pwd;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
}
异常类
package com.hqh.service;
public class UserException extends Exception {
public UserException() {
super();
}
public UserException(String message, Throwable cause) {
super(message, cause);
}
public UserException(String message) {
super(message);
}
public UserException(Throwable cause) {
super(cause);
}
}
部署web项目到tomcat并启动，访问http://localhost:8080/Demo/service?wsdl就能看到wsdl文件
成功！
客户端
经过服务端提供的服务地址，转换wsdl为本地java文件，将全部java文件拷贝至客户端项目中
经过getXXXServicePort()获取到接口的实现类，便可调用服务！
客户端Servlet
package com.hqh.service.servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.hqh.service.IUserService;
import com.hqh.service.User;
import com.hqh.service.UserService;
/**
* Servlet implementation class UserServlet
*/
public class UserServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private IUserService service;
private UserService serviceImpl;
public UserServlet() {
super();
System.out.println("UserServlet.UserServlet()");
//初始化服务端口调用类
serviceImpl = new UserService();
service = serviceImpl.getUserServicePort();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String method = request.getParameter("method");
if(method==null || "".equals(method)) {
list(request,response);
}
}
private void list(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
List<User> users = service.list();
request.setAttribute("users", users);
request.getRequestDispatcher("/list.jsp").forward(request, response);
}
}
index.jsp 调用servlet，在servlet中访问webservice服务
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="/Demo_client/userServlet">查看user list</a>
</body>
</html>
list.jsp 显示从服务端传递回来的对象信息
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<c:forEach items="${users}" var="user">
${user.id}---${user.name }---${user.pwd } <br/>
</c:forEach>
</body>
</html>
备注：eclipse中使用JSTL标签须要引入两个jar包，jstl.jar和standard.jar；将tld中的c.tld,fn.tld,fmt.tld三个最经常使用的tld文件拷贝至WEB-INF目录下任意位置，在jsp中引入taglib标签后，便可使用。