JAVA学习知识点1.24之SpringMVC学习Day05

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SpringMVC参数传递

1.参数传递过程

页面输入参数

后台处理

public class DatarController {
/*方法的注解 value 是访问的url地址 method 数据传递方式*/
@RequestMapping("addUser")
public String addUser(String userName,String age,HttpServletRequest request){
request.setAttribute("userName", userName);
request.setAttribute("age", age);
return "/userManager";
}
@RequestMapping("/delUser" )
public String delUser(){
return "/userManager";
}
/*到页面*/
@RequestMapping("/toUser" )
public String toUser(){
return "/addUser";
}
}

最后在userManager.jsp页面用EL表达式获取值

2出现乱码

get方法的乱码改服务器的编码接收方式

tomcat/conf/server.xml 中<Connector +URIEncoding="UTF-8"

让服务器接收数据用UTF-8

post方法的乱码

在web.xml中配置

<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>

<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

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