springmvc入门二

回顾什么是springmvc，它与spring有什么关系

springmvc属于spring框架的后续产品，用在基于MVC的表现层开发，类似于struts2框架

参见<<springmvc与spring的关系.JPG>>

回顾springmvc工作流程

参见<< springmvc工作流.JPG>>

第十四章 springmvc快速入门（注解版本）

1）springmvc快速入门（注解版）

步一：创建javaee-springmvc-day02这么一个web应用

步二：导入springioc，springweb和springmvc相关的jar包

步三：在/WEB-INF/下创建web.xml文件

<servlet-name>DispatcherServlet</servlet-name>

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

<init-param>

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

<param-value>classpath:spring.xml</param-value>

</init-param>

</servlet>

<servlet-mapping>

<servlet-name>DispatcherServlet</servlet-name>

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

</servlet-mapping>

步四：创建HelloAction.java控制器类

@Controller

public class HelloAction{

@RequestMapping(value="/hello")

public String helloMethod(Model model) throws Exception{

System.out.println("HelloAction::helloMethod()");

model.addAttribute("message","这是我的第二个springmvc应用程序");

return "/success.jsp";

}

步五：在/WebRoot/下创建success.jsp

<%@ page language="java" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>这是我的第二个springmvc应用程序</title>

</head>

<body>

success.jsp<br/>

${message}

</body>

</html>

步六：在/src/目录下创建spring.xml配置文件

<?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:context="http://www.springframework.org/schema/context"

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

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

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="cn.itcast.javaee.springmvc.helloannotation"/>

</beans>

步七：部署web应用到tomcat中，通过浏览器访问如下URL：

http://127.0.0.1:8080/ javaee-springmvc-day02/hello.action

第十五章一个Action中，可以写多个类似的业务控制方法

1）通过模块根路径 + 功能子路径 = 访问模块下子功能的路径

@Controller

@RequestMapping(value="/user")

public class UserAction{

@RequestMapping(value="/add")

public String add(Model model) throws Exception{

System.out.println("HelloAction::add()");

model.addAttribute("message","增加用户");

return "/success.jsp";

}

@RequestMapping(value="/find")

public String find(Model model) throws Exception{

System.out.println("HelloAction::find()");

model.addAttribute("message","查询用户");

return "/success.jsp";

}

增加用户：http://127.0.0.1:8080/myspringmvc-day02/user/add.action

查询用户：http://127.0.0.1:8080/myspringmvc-day02/user/find.action

第十六章在业务控制方法中写入普通变量收集参数

1）可以在业务控制方法中，以参数形式收集客户端参数，springmvc采用方法参数形式的

@Controller

@RequestMapping(value="/user")

public class UserAction{

@RequestMapping(value="/add")

public String add(Model model,int id,String name,Double sal) throws Exception{

System.out.println("HelloAction::add()");

System.out.println(id + ":" + name + ":" + sal);

model.addAttribute("message","增加用户");

return "/success.jsp";

}

http://127.0.0.1:8080/myspringmvc-day02/user/add.action?id=1&name=zhaojun&sal=5000

第十七章限定某个业务控制方法，只允许GET或POST请求方式访问

1）可以在业务控制方法前，指明该业务控制方法只能接收GET或POST的请求

@Controller

@RequestMapping(value="/user")

public class UserAction{

@RequestMapping(value="/add",method=RequestMethod.POST)

public String add(Model model,int id,String name,double sal) throws Exception{

System.out.println("HelloAction::add()::POST");

System.out.println(id + ":" + name + ":" + sal);

model.addAttribute("message","增加用户");

return "/success.jsp";

}

如果不书写method=RequestMethod.POST的话，GET和POST请求都支持

</form>

第十八章在业务控制方法中写入Request，Response等传统web参数

1）可以在业务控制方法中书写传统web参数，这种方式我们不提倡，耦合了

@Controller

@RequestMapping(value="/user")

public class UserAction{

@RequestMapping(value="/add",method=RequestMethod.POST)

public void add(HttpServletRequest request,HttpServletResponse response) throws Exception{

System.out.println("HelloAction::add()::POST");

int id = Integer.parseInt(request.getParameter("id"));

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

double sal = Double.parseDouble(request.getParameter("sal"));

System.out.println(id + ":" + name + ":" + sal);

request.getSession().setAttribute("id",id);

request.getSession().setAttribute("name",name);

request.getSession().setAttribute("sal",sal);

response.sendRedirect(request.getContextPath()+"/register.jsp");

}

第十九章在业务控制方法中写入模型变量收集参数，且使用@InitBind来解决字符串转日期类型

1）在默认情况下，springmvc不能将String类型转成java.util.Date类型，所以我们只能在Action

中自定义类型转换器

编号：<input type="text" name="id" value="${id}"/><br/>

姓名：<input type="text" name="name" value="${name}"/><br/>

薪水：<input type="text" name="sal" value="${sal}"/><br/>

入职时间：<input type="text" name="hiredate" value='<fmt:formatDate value="${hiredate}" type="date"/>'/><br/>

</form>

@Controller

@RequestMapping(value = "/user")

public class UserAction {

@InitBinder

protected void initBinder(HttpServletRequest request,ServletRequestDataBinder binder) throws Exception {

binder.registerCustomEditor(

Date.class,

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

}

@RequestMapping(value = "/add", method = RequestMethod.POST)

public String add(int id, String name, double sal, Date hiredate,

Model model) throws Exception {

System.out.println("HelloAction::add()::POST");

model.addAttribute("id", id);

model.addAttribute("name", name);

model.addAttribute("sal", sal);

model.addAttribute("hiredate", hiredate);

return "/register.jsp";

}

第二十章在业务控制方法中写入User，Admin多个模型收集参数

1）可以在业务控制方法中书写1个模型来收集客户端的参数

2）模型中的属性名必须和客户端参数名一一对应，且提供set/get方法

3）这里说的模型不是Model对象，Model是向视图中封装的数据

User:<br/>

</form>

<hr/>

Admin:<br/>

</form>

public class User {

private int empno;

private String ename;

private int sal;

public class Admin {

private int empno;

private String ename;

private int tel;

@Controller

@RequestMapping(value="/user")

public class UserAction {

@RequestMapping(value="/add",method=RequestMethod.POST)

public String add(User user,Admin admin,Model model) throws Exception{

model.addAttribute("user",user);

model.addAttribute("admin",admin);

model.addAttribute("message","增加成功");

return "/jsp07/success.jsp";

}

第二十一章在业务控制方法中写入包装User的模型来收集参数

可以在业务控制方法中书写0个或多个模型来收集客户端的参数

1）如果多个模型中有相同的属性时，可以用user.name或admin.name来收集客户端参数

2）用一个新的模型将User和Admin再封装一次

public class User {

private int empno;

private String ename;

private int sal;

public class Admin {

private int empno;

private String ename;

private int tel;

public class Bean {

private User user;

private Admin admin;

UserAction.java

@Controller

@RequestMapping(value="/user")

public class UserAction {

@RequestMapping(value="/add",method=RequestMethod.POST)

public String add(Bean bean,Model model) throws Exception{

model.addAttribute("bean",bean);

model.addAttribute("message","增加成功");

return "/jsp08/success.jsp";

}

user.jsp

User:<br/>

</form>

<hr/>

Admin:<br/>

</form>

success.jsp

${requestScope.message}<p/>

<hr/>

User:<br/>

${requestScope.bean.user.empno}<p/>

${requestScope.bean.user.ename}<p/>

${requestScope.bean.user.sal}<p/>

<hr/>

Admin:<br/>

${requestScope.bean.admin.empno}<p/>

${requestScope.bean.admin.ename}<p/>

${requestScope.bean.admin.tel}<p/>

第二十二章在业务控制方法中收集数组参数

批量删除用户

@Controller

@RequestMapping(value="/user")

public class UserAction {

@RequestMapping(value="/add")

public String add(int[] ids,Model model) throws Exception{

model.addAttribute("message","批量删除用户成功");

model.addAttribute("ids",ids);

return "/jsp09/success.jsp";

}

success.jsp

${requestScope.message}<br/>

删除员工的编号分别为:

<c:forEach var="id" items="${ids}">

${id}   

</c:forEach>

http://127.0.0.1:8080/javaee-springmvc-day02/user/add.action?ids=1&ids=2&ids=3

第二十三章在业务控制方法中收集List<JavaBean>参数

批量注册用户

UserAction.java

@Controller

@RequestMapping(value="/user")

public class UserAction {

@RequestMapping(value="/addAll")

public String addAll(Bean bean,Model model) throws Exception{

for(User user : bean.getUserList()){

System.out.println(user.getName()+":"+user.getGender());

}

model.addAttribute("message","批量增加用户成功");

return "/success.jsp";

}

Bean.java

public class Bean {

private List<User> userList = new ArrayList<User>();

public Bean(){}

public List<User> getUserList() {

return userList;

}

public void setUserList(List<User> userList) {

this.userList = userList;

}

registerAll.java

姓名：<input type="text" name="userList[0].name" value="哈哈"/>

性别：<input type="text" name="userList[0].gender" value="男"/>

<hr/>

姓名：<input type="text" name="userList[1].name" value="呵呵"/>

性别：<input type="text" name="userList[1].gender" value="男"/>

<hr/>

姓名：<input type="text" name="userList[2].name" value="嘻嘻"/>

性别：<input type="text" name="userList[2].gender" value="女"/>

<hr/>

</form>

第二十四章结果的转发和重定向

1）在转发情况下，共享request域对象，会将参数从第一个业务控制方法传入第二个业务控制方法，

反之，重定向则不行

删除id=10号的用户，再查询用户

@Controller

@RequestMapping(value="/user")

public class UserAction {

@RequestMapping(value="/delete")

public String delete(int id) throws Exception{

System.out.println("删除用户->" + id);

//转发到find()

return "forward:/user/find.action";

//重定向到find()

//return "redirect:/user/find.action";

}

@RequestMapping(value="/find")

public String find(int id) throws Exception{

System.out.println("查询用户->" + id);

return "/success.jsp";

}

@Controller

@RequestMapping(value="/user")

public class UserAction {

@RequestMapping(value="/addAll")

public String add(Bean bean,Model model) throws Exception{

model.addAttribute("message","批量注册用户成功");

model.addAttribute("bean",bean);

return "redirect:/jsp11/success.jsp";

//return "forward:/jsp11/success.jsp";

}

第二十五章异步发送表单数据到JavaBean，并响应JSON文本返回

1）提交表单后，将JavaBean信息以JSON文本形式返回到浏览器

user.jsp

<form>

</form>

$(":button").click(function(){

var empno = $("input[name='empno']").val();

var ename = $("input[name='ename']").val();

var sal = $("input[name='sal']").val();

var url = "${pageContext.request.contextPath}/user/add.action?id="+new Date().getTime();

var sendData = {

"empno":empno,

"ename":ename,

"sal":sal

};

$.post(url,sendData,function(backData){

alert(backData.empno+"#"+backData.ename+"#"+backData.sal);

});

</script>

User.java

public class User {

private Integer id;

private String name;

private Double sal;

public User(){}

public Integer getId() {

return id;

}

public void setId(Integer id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Double getSal() {

return sal;

}

public void setSal(Double sal) {

this.sal = sal;

}

UserAction.java

@Controller

@RequestMapping(value="/user")

public class UserAction {

@RequestMapping(value="/add")

public @ResponseBody User add(User user) throws Exception{

System.out.println(user.getId()+":"+user.getName()+":"+user.getSal());

return user;

}

spring.xml

<context:component-scan base-package="cn.itcast.javaee.springmvc.app12" />

<bean

class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">

<list>

<bean

class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />

</list>

</property>

</bean>

第二十六章上传单个中文名文件

1）上传本质是文件从客户端复制到服务器端的过程

upload.jsp

<form

action="${pageContext.request.contextPath}/upload.action"

method="POST"

enctype="multipart/form-data">

</form>

success.jsp

上传成功<br/>

UploadAction.java

@Controller

public class UploadAction {

@RequestMapping(value = "/upload")

public String uploadMethod(@RequestParam("uploadFile") MultipartFile uploadFile) throws Exception{

System.out.println("上传文件");

if(!uploadFile.isEmpty()){

String uploadFileName = uploadFile.getOriginalFilename();

byte[] data = uploadFile.getBytes();

OutputStream os = new FileOutputStream("E:/upload/"+uploadFileName);

os.write(data);

os.flush();

os.close();

}

return "/jsp13/success.jsp";

}

第二十七章上传多个中文名文件

1）作业题

第二十八章下载中文名文件

1）下载本质上是文件从服务器端复制到客户端的过程

@Controller

public class DownloadAction {

@RequestMapping(value="/download")

public void downloadMethod(HttpServletRequest request,HttpServletResponse response){

try {

String fileName = "问题解答.txt";

String fileNameEncoder = URLEncoder.encode(fileName,"UTF-8");

response.setContentType("application/x-msdownload");

response.setHeader("content-disposition","attachment;filename="+fileNameEncoder);

InputStream is = request.getSession().getServletContext().getResourceAsStream("/jsp14/download/问题解答.txt");

OutputStream os = response.getOutputStream();

copy(is,os);

} catch (Exception e) {

e.printStackTrace();

}

private void copy(InputStream is,OutputStream os){

try{

byte[] buf = new byte[1024];

int len = 0;

while((len=is.read(buf))>0){

os.write(buf,0,len);

}

}catch(Exception e){

e.printStackTrace();

}finally{

if(is!=null){

try {

is.close();

} catch (IOException e) {

e.printStackTrace();

}

if(os!=null){

try {

os.close();

} catch (IOException e) {

e.printStackTrace();

}

第二十九章表单手工验证

编号：<input type="text" name="empno" value=""/>${requestScope.errorMap.empno_is_null}<br/>

姓名：<input type="text" name="ename" value=""/>${requestScope.errorMap.ename_is_null}<br/>

薪水：<input type="text" name="sal" value=""/>${requestScope.errorMap.sal_is_null}<br/>

</form>

public class User {

private Integer empno;

private String ename;

private Integer sal;

@Controller

public class UserAction {

@RequestMapping(value="/login")

public String loginMethod(User user,Model model) throws Exception{

Map<String,String> errorMap = validateUser(user);

if(errorMap.size()>0){

model.addAttribute("errorMap",errorMap);

return "/jsp15/user.jsp";

}else{

model.addAttribute("message","验证成功");

return "/jsp15/success.jsp";

}

private Map<String,String> validateUser(User user){

Map<String,String> errorMap = new LinkedHashMap<String, String>();

if(user.getEmpno()==null){

errorMap.put("empno_is_null","编号不能为空");

}

if(user.getEname()==null || user.getEname().trim().length()==0){

errorMap.put("ename_is_null","姓名不能为空");

}

if(user.getSal()==null){

errorMap.put("sal_is_null","薪水不能为空");

}

return errorMap;

}

第三十章员工管理系统--查询员工

1）EasyUI + Springmvc + Spring + Jdbc + Oracle

posted @ 2016-02-19 01:28 帅如风阅读(136) 评论(0) 编辑收藏举报

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