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 } |
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; } |
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; } |
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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@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" ); } |
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