文章目录
Spring MVC Hibernate验证器
- 创建一个名称为 HibernateValidator 的动态WEB项目
- 在 com.yiibai.springmvc 包下创建三个Java类:Student和StudentController
- 在jsp子文件夹下创建两个视图文件:addStudent.jsp, result.jsp
- 下载Hibernate Validator库 - Hibernate Validator。解压缩hibernate-validator-5.3.4.Final.jar和所需的依赖关系存并将它们放在CLASSPATH中
- 在src文件夹下创建属性文件messages.properties
Student.java
package com.yiibai.springmvc;
import org.hibernate.validator.constraints.NotEmpty;
import org.hibernate.validator.constraints.Range;
public class Student {
@Range(min = 1, max = 150)
private Integer age;
@NotEmpty
private String name;
private Integer id;
public void setAge(Integer age) {
this.age = age;
}
public Integer getAge() {
return age;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getId() {
return id;
}
}
StudentController.java
package com.yiibai.springmvc;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class StudentController {
@RequestMapping(value = "/addStudent", method = RequestMethod.GET)
public ModelAndView student() {
return new ModelAndView("addStudent", "command", new Student());
}
@ModelAttribute("student")
public Student createStudentModel() {
return new Student();
}
@RequestMapping(value = "/addStudent", method = RequestMethod.POST)
public String addStudent(@ModelAttribute("student") @Validated Student student,
BindingResult bindingResult, Model model) {
if (bindingResult.hasErrors()) {
return "addStudent";
}
model.addAttribute("name", student.getName());
model.addAttribute("age", student.getAge());
model.addAttribute("id", student.getId());
return "result";
}
}
message.properties配置
NotEmpty.student.name = Name is required!
Range.student.age = Age value must be between 1 and 150!
- 这里的键可以是
<Annotation>
.<object-name>
.<attribute>
。 - Value是要显示的消息
HibernateValidator-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:component-scan base-package="com.yiibai.springmvc" />
<mvc:annotation-driven />
<bean class="org.springframework.context.support.ResourceBundleMessageSource"
id="messageSource">
<property name="basename" value="messages" />
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
- 第一个服务方法
student()
,已经在ModelAndView对象中传递了一个名称为“command”的空对象 - 如果在JSP文件中使用<form:form>标签,spring框架需要一个名称为“command”的对象。 所以当调用student()方法时,返回addStudent.jsp视图。
- 服务方法addStudent()将在URL: HibernateValidator/addStudent 上的POST方法被调用。
- addStudent()将根据提交的信息准备模型对象。 最后从服务方法返回“result”视图,这将渲染result.jsp。
- 如果使用validator生成错误,则返回相同的视图“addStudent”,则Spring自动从视图中的BindingResult注入错误消息并显示出来。
addStudent.jsp
<%@ page contentType="text/html; charset=UTF-8" %>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
<title>Spring MVC Form Handling</title>
</head>
<style>
.error {
color: #ff0000;
}
.errorblock {
color: #000;
background-color: #ffEEEE;
border: 3px solid #ff0000;
padding: 8px;
margin: 16px;
}
</style>
<body>
<h2>学生信息</h2>
<form:form method="POST" action="/HibernateValidator/addStudent" commandName="student">
<form:errors path="*" cssClass="errorblock" element="div" />
<table>
<tr>
<td><form:label path="name">姓名:</form:label></td>
<td><form:input path="name" /></td>
<td><form:errors path="name" cssClass="error" /></td>
</tr>
<tr>
<td><form:label path="age">年龄:</form:label></td>
<td><form:input path="age" /></td>
<td><form:errors path="age" cssClass="error" /></td>
</tr>
<tr>
<td><form:label path="id">编号:</form:label></td>
<td><form:input path="id" /></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="提交"/>
</td>
</tr>
</table>
</form:form>
</body>
</html>
<form:errors />
标记,其中path =“*”
来呈现错误消息。
<form:errors path="*" cssClass="errorblock" element="div" />
- 上诉代码将呈现所有输入验证的错误消息
- 使用带有·
path =“name”的<form:errors />
标记来渲染name字段的错误消息
<form:errors path="name" cssClass="error" />
<form:errors path="age" cssClass="error" />
- 上诉代码将呈现姓名(name)和年龄(age)字段验证的错误消息
result.jsp
<%@ page contentType="text/html; charset=UTF-8" %>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
<title>Spring MVC Form Handling</title>
</head>
<body>
<h2>提交的学生信息如下 -</h2>
<table>
<tr>
<td>姓名:</td>
<td>${
name}</td>
</tr>
<tr>
<td>年龄:</td>
<td>${
age}</td>
</tr>
<tr>
<td>编号:</td>
<td>${
id}</td>
</tr>
</table>
</body>
</html>
Spring MVC生成RSS源
- 创建一个名称为 GenerateRSSFeed 的动态WEB项目
- 在 com.yiibai.springmvc 包下创建三个Java类:RSSMessage, RSSFeedViewer 和 RSSController
- 下载配置 Rome 库及其依赖项rome-utils,jdom和slf4j。和所需的依赖关系存并将它们放在CLASSPATH中
- 在src文件夹下创建属性文件messages.properties
RSSMessage.java
package com.yiibai.springmvc;
import java.util.Date;
public class RSSMessage {
String title;
String url;
String summary;
Date createdDate;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getSummary() {
return summary;
}
public void setSummary(String summary) {
this.summary = summary;
}
public Date getCreatedDate() {
return createdDate;
}
public void setCreatedDate(Date createdDate) {
this.createdDate = createdDate;
}
}
RSSFeedViewer.java
package com.yiibai.springmvc;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.view.feed.AbstractRssFeedView;
import com.rometools.rome.feed.rss.Channel;
import com.rometools.rome.feed.rss.Content;
import com.rometools.rome.feed.rss.Item;
public class RSSFeedViewer extends AbstractRssFeedView {
@Override
protected void buildFeedMetadata(Map<String, Object> model, Channel feed,
HttpServletRequest request) {
feed.setTitle("YiibaiPoint Dot Com");
feed.setDescription("Java Yiibai and Examples");
feed.setLink("http://www.yiibai.com");
super.buildFeedMetadata(model, feed, request);
}
@Override
protected List<Item> buildFeedItems(Map<String, Object> model,
HttpServletRequest request, HttpServletResponse response) throws Exception {
List<RSSMessage> listContent = (List<RSSMessage>) model.get("feedContent");
List<Item> items = new ArrayList<Item>(listContent.size());
for(RSSMessage tempContent : listContent ){
Item item = new Item();
Content content = new Content();
content.setValue(tempContent.getSummary());
item.setContent(content);
item.setTitle(tempContent.getTitle());
item.setLink(tempContent.getUrl());
item.setPubDate(tempContent.getCreatedDate());
items.add(item);
}
return items;
}
}
RSSController.java
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class RSSController {
@RequestMapping(value="/rssfeed", method = RequestMethod.GET)
public ModelAndView getFeedInRss() {
List<RSSMessage> items = new ArrayList<RSSMessage>();
RSSMessage content = new RSSMessage();
content.setTitle("Spring教程");
content.setUrl("http://www.yiibai/spring");
content.setSummary("Spring tutorial summary...");
content.setCreatedDate(new Date());
items.add(content);
RSSMessage content2 = new RSSMessage();
content2.setTitle("Spring MVC教程");
content2.setUrl("http://www.yiibai/spring_mvc");
content2.setSummary("Spring MVC tutorial summary...");
content2.setCreatedDate(new Date());
items.add(content2);
ModelAndView mav = new ModelAndView();
mav.setViewName("rssViewer");
mav.addObject("feedContent", items);
return mav;
}
}
GenerateRSSFeed-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="com.yiibai.springmvc" />
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />
<bean id="rssViewer" class="com.yiibai.springmvc.RSSFeedViewer" />
</beans>
Spring MVC生成XML样例
- 创建一个名称为 GenerateXML 的动态WEB项目
- 在 com.yiibai.springmvc 包下创建三个Java类:User 和 UserController
User.java 的代码
package com.yiibai.springmvc;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name = "user")
public class User {
private String name;
private int id;
public String getName() {
return name;
}
@XmlElement
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
@XmlElement
public void setId(int id) {
this.id = id;
}
}
UserController.java
package com.yiibai.springmvc;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping(value="{name}", method = RequestMethod.GET)
public @ResponseBody User getUser(@PathVariable String name) {
User user = new User();
user.setName(name);
user.setId(1);
return user;
}
}
GenerateXML-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:component-scan base-package="com.yiibai.springmvc" />
<mvc:annotation-driven />
</beans>/
- 创建了一个XML映射的POJO用户,在UserController中返回了User对象
- Spring基于RequestMapping自动处理XML转换。
Spring MVC生成JSON数据
- 创建一个名称为 GenerateJson 的动态WEB项目。
- 在 com.yiibai.springmvc 包下创建三个Java类:User 和 UserController。
- 从Maven仓库页面下载Jackson库:Jackson Core,Jackson Databind和Jackson Annotations。把它们放在CLASSPATH中。
User.java
package com.yiibai.springmvc;
public class User {
private String name;
private int id;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}
UserController.java
package com.yiibai.springmvc;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping(value="{name}", method = RequestMethod.GET)
public @ResponseBody User getUser(@PathVariable String name) {
User user = new User();
user.setName(name);
user.setId(1100);
return user;
}
}
GenerateJson-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:component-scan base-package="com.yiibai.springmvc" />
<mvc:annotation-driven />
</beans>
- 创建了一个简单的POJO用户,在UserController中返回了User对象
- Spring基于类路径中的RequestMapping和Jackson jar自动处理JSON转换。
SpringMVC生成PDF文件
- 创建Spring Web Framework开发基于动态表单的Web应用程序:
- 创建一个名称为 GeneratePdf 的动态WEB项目。
- 在 com.yiibai.springmvc 包下创建三个Java类:UserPDFView 和 PDFController。
- 从maven存储库页面下载Apache iText库:Apache iText。
PDFController.java
package com.yiibai.springmvc;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;
public class PDFController extends AbstractController {
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
//user data
Map<String,String> userData = new HashMap<String,String>();
userData.put("100", "Xiao.Lu");
userData.put("102", "User 102");
userData.put("301", "User 301");
userData.put("400", "User 400");
return new ModelAndView("UserSummary","userData",userData);
}
}
UserPDFView.java
package com.yiibai.springmvc;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.view.document.AbstractPdfView;
import com.lowagie.text.Document;
import com.lowagie.text.Table;
import com.lowagie.text.pdf.PdfWriter;
public class UserPDFView extends AbstractPdfView {
protected void buildPdfDocument(Map<String, Object> model, Document document,
PdfWriter pdfWriter, HttpServletRequest request, HttpServletResponse response)
throws Exception {
Map<String,String> userData = (Map<String,String>) model.get("userData");
Table table = new Table(2);
table.addCell("No.");
table.addCell("User Name");
for (Map.Entry<String, String> entry : userData.entrySet()) {
table.addCell(entry.getKey());
table.addCell(entry.getValue());
}
document.add(table);
}
}
GeneratePdf-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<bean
class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />
<bean class="com.yiibai.springmvc.PDFController" />
<bean class="org.springframework.web.servlet.view.XmlViewResolver">
<property name="location">
<value>/WEB-INF/views.xml</value>
</property>
</bean>
</beans>
views.xml 文件中的配置如下所示 -
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean id="UserSummary" class="com.yiibai.springmvc.UserPDFView"></bean>
</beans>
Spring MVC集成Log4j
- 使用Spring Web MVC框架集成LOG4J
- 创建一个名称为 IntegrateLog4j 的动态WEB项目
- 在 com.yiibai.springmvc 包下创建一个Java类:HelloController 。
HelloController.java
package com.yiibai.springmvc;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.ui.ModelMap;
@Controller
@RequestMapping("/hello")
public class HelloController{
private static final Logger LOGGER = Logger.getLogger(HelloController.class);
@RequestMapping(method = RequestMethod.GET)
public String printHello(ModelMap model) {
LOGGER.info("printHello started.");
//logs debug message
if(LOGGER.isDebugEnabled()){
LOGGER.debug("Inside: printHello");
}
//logs exception
LOGGER.error("Logging a sample exception", new Exception("Testing"));
model.addAttribute("message", "Hello Spring MVC Framework!");
LOGGER.info("printHello ended.");
return "hello";
}
}
log4j.properties
# Root logger option
log4j.rootLogger=DEBUG, stdout, file
# Redirect log messages to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{
yyyy-MM-dd HH:mm:ss} %-5p %c{
1}:%L - %m%n
# Redirect log messages to a log file
log4j.appender.file=org.apache.log4j.RollingFileAppender
#outputs to Tomcat home
log4j.appender.file.File=${
catalina.home}/logs/myapp.log
log4j.appender.file.MaxFileSize=5MB
log4j.appender.file.MaxBackupIndex=10
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{
yyyy-MM-dd HH:mm:ss} %-5p %c{
1}:%L - %m%n
IntegrateLog4j-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:component-scan base-package="com.yiibai.springmvc" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
hello.jsp
<%@ page contentType="text/html; charset=UTF-8" %>
<html>
<head>
<title>Hello World</title>
</head>
<body>
<h2>${
message}</h2>
</body>
</html>