struts-json
Struts2序列化的属性,该属性在action中必须有对应的getter方法
如果action的属性很多,我们想要从Action返回到调用页面的数据。这个时候配置includeProperties或者 excludeProperties拦截器即可。而这2个拦截器的定义都在struts2的json-default包内,所以要使用该拦截器的包都要继承自json-default。
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< struts > < constant value = "spring" name = "struts.objectFactory" /> < include file = "struts-admin.xml" ></ include > < package name = "default" extends = "json-default" > < action class = "com.person.PersonAction" name = "person" method = "view" > < result type = "json" > < param name = "includeProperties" >person\.name,persoon\.age,person\.gender </ param > </ result > </ action > </ package > </ struts > |
经过测试,下面的设置也是可以的,就是在includeProperties里面直接写你所在Action的属性
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< struts > < constant value = "spring" name = "struts.objectFactory" /> < include file = "struts-admin.xml" ></ include > < package name = "default" extends = "json-default" > < action class = "com.person.PersonAction" name = "person" method = "view" > < result type = "json" > < param name = "includeProperties" >name,age,gender </ param > </ result > </ action > </ package > </ struts > |
利用Struts 2的支持的可配置结果,可以达到过滤器的效果。Action的处理结果配置支持正则表达式。但是如果返回的对象是一个数组格式的Json数据。比如 peson Bean中有对象persion1…person9,而我只要JSON插件,则可以用如下的正则表达式。
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< struts > < constant value = "spring" name = "struts.objectFactory" /> < include file = "struts-admin.xml" ></ include > < package name = "default" extends = "json-default" > < action class = "com.person.PersonAction" name = "person" method = "view" > < result type = "json" > < param name = "includeProperties" >person\.name,persoon\.age,person\.gender </ param > </ result > </ action > </ package > </ struts > <!--利用Struts 2的支持的可配置结果,可以达到过滤器的效果。Action的处理结果配置支持正则表达式。 但是如果返回的对象是一个数组格式的Json数据。比如peson Bean中有对象persion1...person9,而我只要person1的json数据, 则可以用如下的正则表达式。 --> < struts > < constant value = "spring" name = "struts.objectFactory" /> < include file = "struts-admin.xml" ></ include > < package name = "default" extends = "json-default" > < action class = "com.person.PersonAction" name = "person" method = "view" > < result type = "json" > < param name = "includeProperties" >person\[\d+\]\.person1 </ param > </ result > </ action > </ package > </ struts > <!--excludeProperties拦截器的用法与此类同,如果拦截的仅仅是一个对象,如果拦截掉person Bean的整个对象。 --> < struts > < constant value = "spring" name = "struts.objectFactory" /> < include file = "struts-admin.xml" ></ include > < package name = "default" extends = "json-default" > < action class = "com.person.PersonAction" name = "person" method = "view" > < result type = "json" > < param name = "excludeProperties" >person </ param > </ result > </ action > </ package > </ struts > |
传递List或者对象是,后面要加上 .* 代表全部的意思。
<param name="includeProperties">topicList.*</param>
需要注意的是,如果用JSON插件把返回结果定为JSON。而JSON的原理是在ACTION中的get方法都会序列化,所以前面是get的方法只要没指定不序列化,都会执行,那么可以在该方法的前面加注解声明该方法不做序列化。
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@JSON (serialize = false ) public User getUser() { return this .User; } @JSON (format = "yyyy-MM-dd" ) public Date getStartDate() { return this .startDate; }
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