一、概述。
在很多企业的开法中常常用到springmvc+spring+hibernate(mybatis)这样的架构,springmvc相当于struts是页面到contorller直接的交互的框架也是界面把信息传输到contorller层的一种架构,通过这个架构可以让我们把页面和contorller层解耦,使得开发人员的分工更加明确。
二、代码演示。
1、首先配置springmvc环境。
1.1导入jar。
值得注意的是红色标记的commons-logging这个jar包一定得引入进去不然会报错。
1.2、xml配置文件。
web.xml
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
<?xml version= "1.0" encoding= "utf-8" ?>
<web-app xmlns:xsi= "http://www.w3.org/2001/xmlschema-instance" xmlns= "http://xmlns.jcp.org/xml/ns/javaee" xsi:schemalocation= "http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id= "webapp_id" version= "3.1" >
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet- class >org.springframework.web.servlet.dispatcherservlet</servlet- class >
<load-on-startup> 1 </load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.spring</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
|
springmvc-servlet.xml
1
2
3
4
5
6
7
8
9
10
11
|
<?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">
<context:component-scan base- package = "com.gaowei.controller" />
</beans>
|
2、前台界面代码。
login.jsp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
<%@ 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>
<form action= "login.spring" method= "post" >
username:<input type= "text" name= "username" >
<br/>
password:<input type= "text" name= "password" >
<br/>
<input type= "submit" value= "登录" >
</form>
</body>
</html>
|
no.jsp
1
2
3
4
5
6
7
8
9
10
11
12
|
<%@ 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>
no!
</body>
</html>
|
ok.jsp
1
2
3
4
5
6
7
8
9
10
11
12
|
<%@ 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>
ok! welcome:${username}
</body>
</html>
|
3、contorller层接收前台的两种方式。
方式一:
利用@requestparam这个注解
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
package com.gaowei.controller;
import org.springframework.stereotype.controller;
import org.springframework.ui.model;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestparam;
@controller
public class login {
//方式一
@requestmapping ( "/login" )
public string login( @requestparam ( "username" ) string username,
@requestparam ( "password" ) string password,model model){
if (username.equals(password))
{
model.addattribute( "username" , username);
return "ok.jsp" ;
} else {
return "no.jsp" ;
}
}
}
|
方式二:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
package com.gaowei.controller;
import org.springframework.stereotype.controller;
import org.springframework.ui.model;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestparam;
@controller
public class login {
@requestmapping ( "/login" )
public string login(string username,string password,model model){
if (username.equals(password))
{
model.addattribute( "username" , username);
return "ok.jsp" ;
} else {
return "no.jsp" ;
}
}
}
|
4、界面结果。
第一种传值方式:
第二种传值方式:
三、总结。
这里体现出了springmvc传值方式的多样性满足了开发人员的不同需求。第一种用来表单的提交。第二种用来界面间相互传值,也为了方便开发人员利用ajax。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://blog.csdn.net/gwblue/article/details/42966017