spring MVC笔记1

1.主流的mvc构架包括:

struts1, webwork, strut2, spring mvc, jsf

2.spring MVC特点:

@ 功能组件划分细致

@ 灵活、强大

@ 设计思想优秀

3.spring mvc的作用：

@、以Controller为中心完成对系统流程的控制管理

@、从请求中收集数据

@、对传入参数进行验证

@、根据请求调用相应业务逻辑完成数据处理

@、将处理结果返回给视图

@、国际化支持

@、针对不同视图技术提供不同解析支持方案

@、针对JSP视图技术提供标签库

@、通过拦截器链实现面向方面编程完成系统级控制

@、对文件上传、下载等常用功能的封装

4.Spring MVC框架的核心构件

Dispatcher Servlet (分发器、调度器)

Controller (控制器)

Handler Mapping (映射器)

ViewResolver & View (视图解析器及视图处理类)

Interceptors (拦截器)

LocalResolver

Validate

5.spring MVC示例1

spring-framework下载

Latest GA release: 3.0.1.RELEASE-A

spring-framework-3.0.1.RELEASE-A-dependencies.zip	(sha1)	133.3 MB
spring-framework-3.0.1.RELEASE-A-with-docs.zip	(sha1)	45.3 MB
spring-framework-3.0.1.RELEASE-A.zip	(sha1)	21.8 MB

加Jar包

下载spring 的jar包，包括:spring 本身之外还要下载： spring framework dependencies.zip 它所依赖的一些包。

首先新建一个个名为spring_mvc_test的web project,先导入以下几个包：

(找不到的jar包可以到jarvana去找)

springframework.beans-3.1.0.RELEASE.jar

springframework.context-3.1.0.RELEASE.jar

springframework.context.support-3.1.0.RELEASE.jar

springframework.core-3.1.0.RELEASE.jar

springframework.web.servlet-3.1.0.RELEASE.jar

commons-logging-1.1.1.jar

文件结构图

配置web.xml

<servlet-name>test</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>test</servlet-name>

<url-pattern>*.test</url-pattern>

</servlet-mapping>

spring mvc 特点

1.它是一个大的对象工厂，这是整个spring最核心、最基本的功能。spring mvc的核心功能，表现在在依赖注入。

2.dispatcher servlet在被初始化的时候，就会读取配置文件中的各个bean,完成对各个类型、各个构件的初始化过程。

3.如查没有指定dispatcher(调度器)读取哪一个配置文件，dispatcher会默认读取/WEB-INF/[servlet-name]-servlet.xml配置文件。

4.建一个名为StartController的java文件，再在WEB-INF/目录下建一个test-servlet.xml的配置文件。

StartController.java

package test;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.Controller;

/**

* @className:StartController.java

* @classDescription:

* @author:wei.luo

* @createTime:2012-2-12下午09:21:58

public class StartController implements Controller {

public ModelAndView handleRequest(HttpServletRequest request,

HttpServletResponse response) throws Exception {

System.out.println("start controller is working !");

return new ModelAndView("start"); //只指定一个视图的逻辑名称叫start

//使用控制器与视图名称完全分离，只返回一个名称叫start的视图，具体返回什么视图由后续配置决定。

}

test-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:context="http://www.springframework.org/schema/context"

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">

<props>

<prop key="start.test">startController</prop>

发布到tomcat启动，根据错误提示，添加缺少的对应的Jar包，有如下：

org.springframework.web-3.1.0.RELEASE.jar

org.springframework.asm-3.1.0.RELEASE.jar

org.springframework.expression-3.1.0.RELEASE.jar

start.jsp

<body>

This is my start jsp page. <br>

spring mvc常用controller

@、直接实现Controller 接口或AbstractController抽象类

@、ModelAndView对象

模型视图对象

@、用于直接跳转页面的

ParameterizableViewController, UrlFilenameViewController

参数化视图控制器，url文件名视图控制器

@、在同一控制器类中处理多个请求的MultiActionController.具体调用的方法通过MethodNameResolver决定

(InternalPathMethodResolver, ParameterMethodNameResolver, PropertiesMethodResolver)

按照请求路径名解析，按照参数方法名解析，按照属性方法名解析

方法签名：

public (ModelAndView | Map | String | void) actionName(HttpServletRequest request, HttpServletResponse response, [,HttpSession] [,AnyObject]);

@、能封装表单参数的CommondController、 FormController

如果一个控制器实现了CommandContrller 或FormController，那么它就可以直接接收一个表单对象。

import java.text.SimpleDateFormat;

import java.util.Date;

import javax.ejb.Handle;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.propertyeditors.CustomDateEditor;

import org.springframework.ui.Model;

import org.springframework.validation.BindException;

import org.springframework.web.bind.ServletRequestDataBinder;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.AbstractCommandController;

import org.springframework.web.servlet.mvc.AbstractController;

/**

* @className:EmpController.java

* @classDescription:Emp控制器

* @author:wei.luo

* @createTime:2012-2-13

/*public class EmpController extends AbstractController { //实现简单的Controller抽象类

@Override

protected ModelAndView handleRequestInternal(HttpServletRequest request,

HttpServletResponse response) throws Exception { //

String name=request.getParameter("name");

String phone=request.getParameter("phone");

Emp emp=new Emp();

emp.setName(name);

emp.setPhone(phone);

//empService.add(emp);

return null;

}

}*/

public class EmpController extends AbstractCommandController{

@Override

protected ModelAndView handle(HttpServletRequest request,

HttpServletResponse response, Object command, BindException errors)

throws Exception {

Emp emp=(Emp)command;

System.out.println(emp.toString());

return new ModelAndView("success");

protected void initBinder(HttpServletRequest request,

ServletRequestDataBinder binder) throws Exception {

//绑定日期数据，注册一个新的日期编辑器

binder.registerCustomEditor(Date.class, new CustomDateEditor(

new SimpleDateFormat("yyyy-MM-dd"), true));

}

Emp.java

package test;

import java.text.SimpleDateFormat;

import java.util.Date;

/**

* @className:Emp.java

* @classDescription:

* @author:wei.luo

* @createTime:2012-2-13

public class Emp {

private int empNo;

private String name;

private String phone;

private Date hireDate;

private String dept;

public int getEmpNo() {

return empNo;

}

public void setEmpNo(int empNo) {

this.empNo = empNo;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getPhone() {

return phone;

}

public void setPhone(String phone) {

this.phone = phone;

}

public Date getHireDate() {

return hireDate;

}

public void setHireDate(Date hireDate) {

this.hireDate = hireDate;

}

public String getDept() {

return dept;

}

public void setDept(String dept) {

this.dept = dept;

}

@Override

public String toString() {

return "Emp [empNo="+empNo+",name=" + name + ", phone=" + phone

+ ",hireDate="+new SimpleDateFormat("yyyy-MM-dd").format(hireDate)

+",dept="+dept+"]";

}

test-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:context="http://www.springframework.org/schema/context"

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">

<props>

<prop key="start.test">startController</prop>

<prop key="login.test">loginController</prop>

<prop key="add_emp.test">addEmpController</prop>

<prop key="add.test">addEmpSuccController</prop>

</props>

</property>

</bean>

<!---

自定义属性编辑器(MyEditor.java)

package test;

import java.beans.PropertyEditorSupport;

/**

* @className:MyEditor.java

* @classDescription:自定义一个属性编辑器

* @author:wei.luo

* @createTime:2012-2-13

public class MyEditor extends PropertyEditorSupport {

@Override

public String getAsText() {

// TODO Auto-generated method stub

return super.getAsText();

}

@Override

public void setValue(Object value) {

// TODO Auto-generated method stub

super.setValue(value);

}

@Override

public void setAsText(String text) throws IllegalArgumentException {

// TODO Auto-generated method stub

super.setAsText(text);

}

表单控制器

EmpFormController.java

package test;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.HashMap;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.propertyeditors.CustomDateEditor;

import org.springframework.validation.BindException;

import org.springframework.web.bind.ServletRequestDataBinder;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.SimpleFormController;

/**

* @className:EmpFormController.java

* @classDescription:表单控制器

* @author:wei.luo

* @createTime:2012-2-13上午02:41:45

public class EmpFormController extends SimpleFormController {

/**

* 当表单提交是执行

@Override

protected ModelAndView onSubmit(Object command) throws Exception {

Emp emp=(Emp)command; //注意，直接将command对象转换成Emp对象即可

System.out.println(emp.toString());

return new ModelAndView(getSuccessView());

protected Map referenceData(HttpServletRequest request) throws Exception {

Map<String,Object> model=new HashMap<String,Object>(); //建立一个模型

model.put("deptList", new String[]{"sales","manage"}); //向模型中放入一个列表

return model; //返回加入了deptList的模型

protected void initBinder(HttpServletRequest request,

ServletRequestDataBinder binder) throws Exception {

//绑定日期数据，注册一个新的日期编辑器

binder.registerCustomEditor(Date.class, new CustomDateEditor(

new SimpleDateFormat("yyyy-MM-dd"), true));

}

配置文件(test-servlet.xml)

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:context="http://www.springframework.org/schema/context"

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">

<props>

<prop key="start.test">startController</prop>

<prop key="login.test">loginController</prop>

<prop key="add_emp.test">addEmpController</prop>

</props>

</property>

</bean>

spring mvc 的controller控制器处理

绑定注册日期属性编辑器控件

处理模型

一个controller对应多个url的处理

MultiController

要点：

1.如果没有指定视图名称，那么spring mvc 它会按默认的方式来指定视图名称。

EmpMultiController.java

package test;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

/**

* @className:EmpMultiController.java

* @classDescription:

* @author:wei.luo

* @createTime:2012-2-14

public class EmpMultiController extends MultiActionController {

private ModelAndView toAdd() {

//viewName logic name :视图的逻辑名

//Model 隐含了Map对象

//构建模型的方法：

//1.直接在new的时候，传入模型名称

//ModelAndView mav=new ModelAndView("add_emp");

//2.先构建模型，再执行setViewName方法

//ModelAndView mav=new ModelAndView();

//mav.setViewName("add_emp");

//3.加入模型项

//mav.addObject(attributeValue);

//4.也可以一次性加入一个Map项

//Map model = new HashMap;

//mav.addAllObjects(modelMap);

ModelAndView mav = new ModelAndView();

mav.setViewName("add_emp");

mav.addObject("deptList",new String[]{"salse","manage"});

return mav;

}

//public ModelAndView addEmp(HttpServletRequest request,

public String addEmp(HttpServletRequest request,

HttpServletResponse response,HttpSession session,Emp emp){

System.out.println(emp);

//return new ModelAndView("success");

return "success"; //直接返回一个字符串，就是viewName

}

test-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:context="http://www.springframework.org/schema/context"

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">

<props>

<prop key="start.test">startController</prop>

<prop key="login.test">loginController</prop>

<prop key="to_add.test">addEmpController</prop>

<prop key="add_emp.test">addEmpController</prop>

</props>

</property>

</bean>

spring mvc 常用的Handler mapping

@、默认的ControllerClassNameHandlerMapping

按照控制器的类名来自动完成映射，在这需要使用拦截器的时候，它不需要配置任何属性。如下：

当发送一个以 abc.test 结尾的请求时，它会找一个名称为AbcController，直接根据控制器的类名匹配请求的路径来寻找控制器。

如果是multiController

@、常用的SimpleUrlHandlerMapping

按照简单的Url映射

@、BeanNameUrlHandlerMapping

按照beanName的Url来映射。

@、基于注解Controller时使用的DefaultAnnotationHandlerMapping

基于注解的MVC

要点：

基于xml文件配置的mvc的缺点：到项目到达一定程序是，就会有很多的配置文件，造成项目维护起来比较麻烦，优点：低侵入式，降低了耦合。
新建一个名为：@mvc 的项目，并把配置spring mvc需要的Jar都加到WEB-INF/lib目录下。
在项目中建两个源包，src/java , src/config ,源包在编译之后，都会跑到Tomcat相应的应用目录下的WEB-INF/classes目录下。
在config源包中建一个spring包，并在spring包中建一个servlet.xml,配置servlet.xml,如果要使用基于注解的spring mvc ，则在配置文件中必须加入一个 context 与 mvc 的命名空间。

5. controller类可以不定义requestMapping,但一个要请求路径的方法，就必须定义requestMapping。

配置文件的模式定义

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:mvc="http://www.springframework.org/schema/mvc"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:context="http://www.springframework.org/schema/context"

xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.1.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd

http://www.springframework.org/schema/util

http://www.springframework.org/schema/util/spring-util-3.1.xsd" >

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:mvc="http://www.springframework.org/schema/mvc"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:p="http://www.springframework.org/schema/p"

xmlns:util="http://www.springframework.org/schema/util"

xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.1.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-3.1.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd

http://www.springframework.org/schema/util

http://www.springframework.org/schema/util/spring-util-3.1.xsd" >

<context:component-scan base-package="test.controller" ></context:component-scan>

</bean>

</beans>

TestController.java

package test.controller;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

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;

/**

* @className:TestController.java

* @classDescription:

* @author:wei.luo

* @createTime:2012-2-15

@Controller //标记这个类为控制器

@RequestMapping("/test") //类的映射路径

public class TestController {

@RequestMapping("/start") //映射到start方法

public String start(HttpServletRequest request,HttpServletResponse response){

String nameString=request.getParameter("name");

System.out.println("name="+nameString);

return "start";

}

//restful风格

//http://localhost:8080/@mvc/test/start.do?name=zhangsan

//http://localhost:8080/@mvc/test/start.do?name=lisi

//http://localhost:8080/@mvc/test/start/zhangsan.do

//http://localhost:8080/@mvc/test/start/lisi.do

@RequestMapping("/start2/{name}/{age}") //name为url模板中取出的路径变量

public String start2(@PathVariable String name,@PathVariable("age") String age,

/*如果采用release模式，则需要定义为 @PathVariable("name") String name

因为release模式不保存变量名*/

HttpServletRequest request,HttpServletResponse response){

System.out.println("name="+name+" age="+age);

return "start";

}

//访问以下链接：

//http://localhost:8080/@mvc/test/start2/zhangsan/20.do

//以相同的路径，不同的请求方法访问

@RequestMapping(value="/start3",method=RequestMethod.POST) //映射到start方法

public String start_post(HttpServletRequest request,HttpServletResponse response){

System.out.println("RequestMethod.POST");

return "start_post";

}

@RequestMapping(value="/start3",method=RequestMethod.GET)

public String start_get(HttpServletRequest request,HttpServletResponse respose){

System.out.println("RequestMethod.GET");

return "start_get";

}

start.jsp

<body>

<h1>This is start JSP page. </h1><br>

<h1>This is start_get JSP page. </h1><br>

</body>

start_post.jsp

<body>

<h1>This is start_post JSP page. </h1><br>

@、@RequestMapping

请求映射

@、@RequestParam, @PathVariable, @CookieValue

@、Handler方法的可用参数与返回值

spring MVC 常用ViewResoler & View

要点

当映射的方法返回值为void的时候，则spring mvc框架会生成一个隐含的viewName,根据请求的路径，生成相应的视图名，如果请求的是 xxx.do,则返回的视图为 xxx.jsp ;
当映射的方法返回值的类型为String,则方法返回对应的视图名，在结果页面中同样还可以使用方法中的model;
当返回的是任意类型的对象时，则框架会将该类型的对象也存放到model中，例如：如果函数返回值是User类型的对象，则框架会自动向Model中设置一个属性：model.addAttribute("user",user) ;
如果返回List<User>,则框架会自动向Model中加入：model.addAttribute("userList",userList) ;
如果返回Set<User>,则框架会自动向Model中加入：model.addAttribute("userSet",userSet) ;
如果返回一个map<String,?>对象，则框架也会自动向Model中加入：model.addAllAttributes(map<String,?>) ;
也可以直接返回model;而视图名则按默认的策略解析，如果xxx.do解析成xxx.jsp ;
更完整的方式是直接返回ModelAndView。

示例1 (TestController.java)

package test.controller;

import java.io.PrintWriter;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.List;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.springframework.beans.propertyeditors.CustomDateEditor;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.validation.BindingResult;

import org.springframework.web.bind.annotation.CookieValue;

import org.springframework.web.bind.annotation.InitBinder;

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.support.WebRequestDataBinder;

import org.springframework.web.servlet.ModelAndView;

import test.entity.User;

/**

* @className:TestController.java

* @classDescription:

* @author:wei.luo

* @createTime:2012-2-15

@Controller //标记这个类为控制器

@RequestMapping("/test") //类的映射路径

public class TestController<AnyType> {

@RequestMapping("/start") //映射到start方法

public String start(HttpServletRequest request,HttpServletResponse response){

String nameString=request.getParameter("name");

System.out.println("name="+nameString);

return "start";

}

//restful风格

//http://localhost:8080/@mvc/test/start.do?name=zhangsan

//http://localhost:8080/@mvc/test/start.do?name=lisi

//http://localhost:8080/@mvc/test/start/zhangsan.do

//http://localhost:8080/@mvc/test/start/lisi.do

@RequestMapping("/start2/{name}/{age}") //name为url模板中取出的路径变量

public String start2(@PathVariable String name,@PathVariable("age") String age,

/*如果采用release模式，则需要定义为 @PathVariable("name") String name

因为release模式不保存变量名*/

HttpServletRequest request,HttpServletResponse response){

System.out.println("name="+name+" age="+age);

return "start";

}

//访问以下链接：

//http://localhost:8080/@mvc/test/start2/zhangsan/20.do

//以相同的路径，不同的请求方法访问

@RequestMapping(value="/start3",method=RequestMethod.POST) //映射到start方法

public String start_post(HttpServletRequest request,HttpServletResponse response){

System.out.println("RequestMethod.POST");

return "start_post";

}

@RequestMapping(value="/start3",method=RequestMethod.GET)

public String start_get(HttpServletRequest request,HttpServletResponse respose){

System.out.println("RequestMethod.GET");

return "start_get";

}

@RequestMapping(value="/{test}",method=RequestMethod.GET)

public void testPathVariable(@PathVariable("test") Date test){

}

@InitBinder

public void initBinder(WebRequestDataBinder binder){

binder.registerCustomEditor(Date.class,new CustomDateEditor(

new SimpleDateFormat("yyyyMMdd"),false));

}

//session前提条件，当前请求session可用,request.getSession(),session.setAttribute();

public void testAllArguments(HttpServletRequest request,HttpServletResponse response,

HttpSession session,@PathVariable AnyType xxx,@PathVariable AnyType id,

@CookieValue("user-Agent") AnyType cookieName){

}

@RequestMapping

public String testAllArguments(PrintWriter out,Map model){

//out = response.getWrite();

//out.print();

new ModelAndView();

//out.print("-----------");

return "viewName";

}

@RequestMapping

public String testCommand(User user,BindingResult result){

return "xxx";

}

@RequestMapping("/xxx")

public void testVoid(){

System.out.print("xxx");

//会生成一个隐含的viewName -- 按请求路径,如果请求是xxx.do 则返回的视图为 xxx.jsp

//${appName }/test/xxx.do --> test/xxx --> /WEB-INF/page/test/xxx.jsp

}

public User testuser(){ //model("user",user)

return null;

}

//除了可以单独返回一个User对象，我们也可以返回一个List对象

public List<User> testuser2(){

//model("userList",user) request.getAttribute("userList");

//即默认生成的key值为 userList

return null;

}

User.java

package test.entity;

/**

* @className:User.java

* @classDescription:

* @author:wei.luo

* @createTime:2012-2-15下午11:04:10

public class User {

private String name;

private String password;

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;

}

@、 InternalResourceViewResolver、 UrlBasedViewResolver

@、Redirect 重定向视图 (redirect:)

示例2 (UserController.java)

package test.controller;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import test.entity.User;

/**

* @className:UserController.java

* @classDescription:

* @author:wei.luo

* @createTime:2012-2-16上午12:59:17

@Controller

@RequestMapping("/user")

public class UserController {

@RequestMapping(method=RequestMethod.GET)

public String addForm(){

return "add_user";

}

@RequestMapping(method=RequestMethod.POST)

public String addUser(User user){

//返回一个重定向视图

return "redirect:/user_list";

}

//避免重复提交

//request.forward(); a -server -> b

//response.redirect a --> server --> client --> b

}

@、XmlViewResovler

@、视图链

@、JstlView, ExcelView及自定义view (JsperReport, Pdf, Excel)

package test.controller;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;

import org.springframework.web.servlet.ModelAndView;

/**

* @className:MyInteceptor.java

* @classDescription:

* @author:wei.luo

* @createTime:2012-2-16上午01:30:20

public class MyInteceptor implements HandlerInterceptor {

//释放资源

public void afterCompletion(HttpServletRequest request,

HttpServletResponse response, Object arg2, Exception arg3)

throws Exception {

}

//控制器执行完，生成视图之前可以做的动作，向模型中添加公共成员

public void postHandle(HttpServletRequest request, HttpServletResponse response,

Object handler, ModelAndView modelAndView) throws Exception {

}

//拦截之前执行的方法

public boolean preHandle(HttpServletRequest request, HttpServletResponse response,

Object handler) throws Exception {

return false;

}

servlet.xml

…………

<mvc:interceptors>

<mvc:interceptor>

<mvc:mapping path="/user/*"/>

新建几个properties文件，编辑内容如下：

mess.properties

welcome=welcome

mess_zh_CN.properties

welcome=\u6B22\u8FCE

mess_en_US.properties

welcome=(US)welcome

@、JSR-303 validate bean

框架验证

编辑UserController.java

package test.controller;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;

import org.springframework.validation.BindingResult;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import test.entity.User;

/**

* @className:UserController.java

* @classDescription:

* @author:wei.luo

* @createTime:2012-2-16上午12:59:17

@Controller

@RequestMapping("/user")

public class UserController {

@RequestMapping(method=RequestMethod.GET)

public String addForm(){

return "add_user";

}

@RequestMapping(method=RequestMethod.POST)

public String addUser(User user){

//返回一个重定向视图

return "redirect:/user_list";

}

//避免重复提交

//request.forward(); a -server -> b

//response.redirect a --> server --> client --> b

//spring mvc的bean验证,对user对象加入验证，并绑定到一个结果集上

@RequestMapping(method=RequestMethod.POST)

public String addUser2(@Valid User user,BindingResult result){

if(result.hasErrors()){ //如果验证发生错误

return "formView";

}

//返回一个重定向视图

return "redirect:/user_list";

}

//使用这个验证，要加入以下几个包：

//validation-api-1.0.0.GA.jar

//hibernate-validator-4.0.2.GA.jar

//slf4j-api-1.5.6.jar

//slf4j-log4j12-1.5.6.jar

}

参考技术文档

http://static.springsource.org/spring/docs/current/spring-framework-reference/html/mvc.html

posted @ 2012-02-16 22:05 维唯为为阅读(1507) 评论(0) 编辑收藏举报

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