Spring Form Tags
2013-12-06 11:06
295 查看
在这个例子里你将会看到如何使用动态值来填充表单。
注册表单registration.jsp页面.
[html] view
plaincopy
<span style="font-size:16px;"><%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<!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=ISO-8859-1">
<title>Registration Page</title>
</head>
<body>
<form:form method="post" commandName="user">
User Name :<form:input path="name"/><br>
Password :<form:password path="password"/><br>
Gender :<form:radiobutton path="gender" value="Male" label="Male"/>
<form:radiobutton path="gender" value="Female" label="Female"/><br>
Country :<form:select path="country">
<form:option value="0" label="Select" />
<form:options items="${countryList}" itemValue="countryId" itemLabel="countryName"/>
</form:select><br>
About you :<form:textarea path="aboutYou"/><br>
Community :<form:checkboxes path="communityList" items="${communityList}" itemValue="key" itemLabel="value" /> <br>
<form:checkbox path="mailingList" label="Would you like to join our mailinglist?"/><br>
<input type="submit" value="Register">
</form:form>
</body>
</html></span>
在表单里我们从后台填充countryList和communityList。items属性持有他们的集合。itemValue 和itemValue 分别持用key和对应的value。
表单中我们有三个动态对象User，Country和Community，User对象是和表单相关联的》
User类：
[java] view
plaincopy
package com.zcl.spring.formtag;
import java.util.List;
@SuppressWarnings("unchecked")
public class User {
private String name ;
private String password ;
private String gender ;
private String country ;
private List countryList ;
private String aboutYou ;
private String[] community ;
private List communityList ;
private boolean mailingList ;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public List getCountryList() {
return countryList;
}
public void setCountryList(List countryList) {
this.countryList = countryList;
}
public String getAboutYou() {
return aboutYou;
}
public void setAboutYou(String aboutYou) {
this.aboutYou = aboutYou;
}
public String[] getCommunity() {
return community;
}
public void setCommunity(String[] community) {
this.community = community;
}
public List getCommunityList() {
return communityList;
}
public void setCommunityList(List communityList) {
this.communityList = communityList;
}
public boolean isMailingList() {
return mailingList;
}
public void setMailingList(boolean mailingList) {
this.mailingList = mailingList;
}
}
User对象中countryList和communityList分别持有countries和communities的list集合。
CountryList包含了一系列Country对象
[java] view
plaincopy
package com.zcl.spring.formtag;
public class Country {
private int countryId ;
private String countryName ;
public Country(int countryId, String countryName) {
this.countryId = countryId;
this.countryName = countryName;
}
public int getCountryId() {
return countryId;
}
public void setCountryId(int countryId) {
this.countryId = countryId;
}
public String getCountryName() {
return countryName;
}
public void setCountryName(String countryName) {
this.countryName = countryName;
}
}
contryId用于在后台找到country而countryName 用于在前台显示country。
相似的communityList包含了一系列community对象
[java] view
plaincopy
package com.zcl.spring.formtag;
public class Community {
private String key ;
private String value ;
public Community(String key, String value) {
this.key = key;
this.value = value;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
}
同样的这儿value用于在前台显示而key用于后台。
在控制器里需要覆写referenceData()方法，在这个方法里你能指定默认值当表单加载给用户时，这个方法被自动的调用。
[html] view
plaincopy
package com.zcl.spring.formtag;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import com.sun.xml.internal.ws.developer.UsesJAXBContext;
@SuppressWarnings("deprecation")
public class UserController extends SimpleFormController {
private UserService userService ;
public UserController(){
setCommandClass(User.class) ;
setCommandName("user") ;
}
public void setUserService(UserService userService) {
this.userService = userService;
}
@SuppressWarnings("unchecked")
@Override
protected Map referenceData(HttpServletRequest request)throws Exception{
Map referenceDate = new HashMap() ;
referenceDate.put("countryList",userService.getAllCountries()) ;
referenceDate.put("communityList", userService.getAllCommunities()) ;
return referenceDate ;
}
@Override
protected ModelAndView onSubmit(Object command) throws Exception{
User user = (User)command ;
userService.add(user) ;
return new ModelAndView("userSuccess","user",user) ;
}
}
这儿我们需要在UserService和UserServiceImpl里增加相应的方法，设置相应的值。
[html] view
plaincopy
package com.zcl.spring.formtag;
import java.util.List;
public interface UserService {
public void add(User user) ;
public List<Country> getAllCountries();
public List<Community> getAllCommunities();
}
[java] view
plaincopy
package com.zcl.spring.formtag;
import java.util.ArrayList;
import java.util.List;
public class UserServiceImpl implements UserService {
@Override
public void add(User user) {
System.out.println("User added successfully") ;
}
@SuppressWarnings("unchecked")
@Override
public List getAllCountries() {
List countryList = new ArrayList();
countryList.add(new Country(1,"India"));
countryList.add(new Country(2,"USA"));
countryList.add(new Country(3,"UK"));
return countryList;
}
@SuppressWarnings("unchecked")
@Override
public List getAllCommunities() {
List communityList = new ArrayList();
communityList.add(new Community("Spring","Spring"));
communityList.add(new Community("Hibernate","Hibernate"));
communityList.add(new Community("Struts","Struts"));
return communityList;
}
}
配置dispatcher-servlet.xml文件
[html] view
plaincopy
<?xml version="1.0" encoding="UTF-8"?>
<beans xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans">
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean id="userService" class="com.zcl.spring.formtag.UserServiceImpl" />
<!-- <context:component-scan base-package="com.zcl.spring.simpleform" />
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />-->
<bean class="com.zcl.spring.formtag.UserController" p:successView="userSuccess" p:formView="userForm" p:userService-ref="userService" name="/userRegistration.html"/>
</beans>
修改显示页面，使用jstl标签。下载jstl包将c.tld拷贝到WEB-INF下，然后就可以直接使用了，在jsp文件里加上<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>表示支持他的核心标签库。
[html] view
plaincopy
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!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=ISO-8859-1">
<title>Success page</title>
</head>
<body>
User Details
<hr>
User Name : <c:out value="${user.name}"></c:out> <br />
Gender : <c:out value="${user.gender}"></c:out> <br />
Country : <c:out value="${user.country}"></c:out> <br />
About You : <c:out value="${user.aboutYou}"></c:out> <br />
Community : <c:forEach var="community" items="${user.communityList}">
<c:out value="${community}"></c:out>
</c:forEach> <br />
Mailing List: <c:out value="${user.mailingList} "></c:out>
</body>
</html>
运行结果和前面一样，注意要通过首页“response.sendRedirect("userRegistration.html"); ”跳转过去。
注册表单registration.jsp页面.
[html] view
plaincopy
<span style="font-size:16px;"><%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Registration Page</title>
</head>
<body>
<form:form method="post" commandName="user">
User Name :<form:input path="name"/><br>
Password :<form:password path="password"/><br>
Gender :<form:radiobutton path="gender" value="Male" label="Male"/>
<form:radiobutton path="gender" value="Female" label="Female"/><br>
Country :<form:select path="country">
<form:option value="0" label="Select" />
<form:options items="${countryList}" itemValue="countryId" itemLabel="countryName"/>
</form:select><br>
About you :<form:textarea path="aboutYou"/><br>
Community :<form:checkboxes path="communityList" items="${communityList}" itemValue="key" itemLabel="value" /> <br>
<form:checkbox path="mailingList" label="Would you like to join our mailinglist?"/><br>
<input type="submit" value="Register">
</form:form>
</body>
</html></span>
在表单里我们从后台填充countryList和communityList。items属性持有他们的集合。itemValue 和itemValue 分别持用key和对应的value。
表单中我们有三个动态对象User，Country和Community，User对象是和表单相关联的》
User类：
[java] view
plaincopy
package com.zcl.spring.formtag;
import java.util.List;
@SuppressWarnings("unchecked")
public class User {
private String name ;
private String password ;
private String gender ;
private String country ;
private List countryList ;
private String aboutYou ;
private String[] community ;
private List communityList ;
private boolean mailingList ;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public List getCountryList() {
return countryList;
}
public void setCountryList(List countryList) {
this.countryList = countryList;
}
public String getAboutYou() {
return aboutYou;
}
public void setAboutYou(String aboutYou) {
this.aboutYou = aboutYou;
}
public String[] getCommunity() {
return community;
}
public void setCommunity(String[] community) {
this.community = community;
}
public List getCommunityList() {
return communityList;
}
public void setCommunityList(List communityList) {
this.communityList = communityList;
}
public boolean isMailingList() {
return mailingList;
}
public void setMailingList(boolean mailingList) {
this.mailingList = mailingList;
}
}
User对象中countryList和communityList分别持有countries和communities的list集合。
CountryList包含了一系列Country对象
[java] view
plaincopy
package com.zcl.spring.formtag;
public class Country {
private int countryId ;
private String countryName ;
public Country(int countryId, String countryName) {
this.countryId = countryId;
this.countryName = countryName;
}
public int getCountryId() {
return countryId;
}
public void setCountryId(int countryId) {
this.countryId = countryId;
}
public String getCountryName() {
return countryName;
}
public void setCountryName(String countryName) {
this.countryName = countryName;
}
}
contryId用于在后台找到country而countryName 用于在前台显示country。
相似的communityList包含了一系列community对象
[java] view
plaincopy
package com.zcl.spring.formtag;
public class Community {
private String key ;
private String value ;
public Community(String key, String value) {
this.key = key;
this.value = value;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
}
同样的这儿value用于在前台显示而key用于后台。
在控制器里需要覆写referenceData()方法，在这个方法里你能指定默认值当表单加载给用户时，这个方法被自动的调用。
[html] view
plaincopy
package com.zcl.spring.formtag;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import com.sun.xml.internal.ws.developer.UsesJAXBContext;
@SuppressWarnings("deprecation")
public class UserController extends SimpleFormController {
private UserService userService ;
public UserController(){
setCommandClass(User.class) ;
setCommandName("user") ;
}
public void setUserService(UserService userService) {
this.userService = userService;
}
@SuppressWarnings("unchecked")
@Override
protected Map referenceData(HttpServletRequest request)throws Exception{
Map referenceDate = new HashMap() ;
referenceDate.put("countryList",userService.getAllCountries()) ;
referenceDate.put("communityList", userService.getAllCommunities()) ;
return referenceDate ;
}
@Override
protected ModelAndView onSubmit(Object command) throws Exception{
User user = (User)command ;
userService.add(user) ;
return new ModelAndView("userSuccess","user",user) ;
}
}
这儿我们需要在UserService和UserServiceImpl里增加相应的方法，设置相应的值。
[html] view
plaincopy
package com.zcl.spring.formtag;
import java.util.List;
public interface UserService {
public void add(User user) ;
public List<Country> getAllCountries();
public List<Community> getAllCommunities();
}
[java] view
plaincopy
package com.zcl.spring.formtag;
import java.util.ArrayList;
import java.util.List;
public class UserServiceImpl implements UserService {
@Override
public void add(User user) {
System.out.println("User added successfully") ;
}
@SuppressWarnings("unchecked")
@Override
public List getAllCountries() {
List countryList = new ArrayList();
countryList.add(new Country(1,"India"));
countryList.add(new Country(2,"USA"));
countryList.add(new Country(3,"UK"));
return countryList;
}
@SuppressWarnings("unchecked")
@Override
public List getAllCommunities() {
List communityList = new ArrayList();
communityList.add(new Community("Spring","Spring"));
communityList.add(new Community("Hibernate","Hibernate"));
communityList.add(new Community("Struts","Struts"));
return communityList;
}
}
配置dispatcher-servlet.xml文件
[html] view
plaincopy
<?xml version="1.0" encoding="UTF-8"?>
<beans xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans">
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean id="userService" class="com.zcl.spring.formtag.UserServiceImpl" />
<!-- <context:component-scan base-package="com.zcl.spring.simpleform" />
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />-->
<bean class="com.zcl.spring.formtag.UserController" p:successView="userSuccess" p:formView="userForm" p:userService-ref="userService" name="/userRegistration.html"/>
</beans>
修改显示页面，使用jstl标签。下载jstl包将c.tld拷贝到WEB-INF下，然后就可以直接使用了，在jsp文件里加上<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>表示支持他的核心标签库。
[html] view
plaincopy
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!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=ISO-8859-1">
<title>Success page</title>
</head>
<body>
User Details
<hr>
User Name : <c:out value="${user.name}"></c:out> <br />
Gender : <c:out value="${user.gender}"></c:out> <br />
Country : <c:out value="${user.country}"></c:out> <br />
About You : <c:out value="${user.aboutYou}"></c:out> <br />
Community : <c:forEach var="community" items="${user.communityList}">
<c:out value="${community}"></c:out>
</c:forEach> <br />
Mailing List: <c:out value="${user.mailingList} "></c:out>
</body>
</html>
运行结果和前面一样，注意要通过首页“response.sendRedirect("userRegistration.html"); ”跳转过去。
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
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