springmvc提供的modelandview可以很方便的将后台的值传到前台,前台页面直接使用el表达式进行获取,获取方式:
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@requestmapping (value = "/home" )
public modelandview home(httpservletrequest request, httpservletresponse response){
list<string> list= new arraylist<string>();
list.add( "aaa" );
list.add( "bbb" );
list.add( "ccc" );
return new modelandview( "back/index" , "list" , list); //直接将值和路径放到构造方法中返回
}
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2、
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@requestmapping (value = "/home" )
public modelandview home(httpservletrequest request, httpservletresponse response){
list<string> list= new arraylist<string>();
list.add( "aaa" );
list.add( "bbb" );
list.add( "ccc" );
modelandview mav= new modelandview();
mav.setviewname( "back/index" ); //返回路径
mav.addobject( "list" , list); //使用modelandview的addobject方法将list放进去
return mav;
}
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1和2返回的都是一个list,也可以返回单个值,如下是代码实现:
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@requestmapping (value = "/home" )
public modelandview home(httpservletrequest request, httpservletresponse response){
modelandview mav= new modelandview();
mav.setviewname( "back/index" ); //返回路径
mav.addobject( "msg" , "我要返回值" );
return mav;
}
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3、也可以返回一个map
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@requestmapping (value = "/home" )
public modelandview home(httpservletrequest request, httpservletresponse response){
map<string, string> map= new hashmap<string, string>();
map.put( "pk" , "北京" );
map.put( "sh" , "上海" );
modelandview mav= new modelandview();
mav.setviewname( "back/index" ); //返回路径
mav.addobject( "map" , map);
return mav;
}
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4、
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@requestmapping (value = "/home" )
public modelandview home(httpservletrequest request, httpservletresponse response){
map<string, string> map= new hashmap<string, string>();
map.put( "pk" , "北京" );
map.put( "sh" , "上海" );
return new modelandview( "back/index" , "map" , map).addobject( "msg" , "我要返回值" );
}
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以上四种返回方法,在项目中都是很有用的,希望可以帮助到大家,谢谢!
这篇springmvc的modelandview传值方法就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/carse/article/details/61920028