struts.xml配置返回json數(shù)據(jù)

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1、Struts.xml配置返回JSON數(shù)據(jù)測(cè)試struts.xml中result參數(shù)的不同返回不同的json數(shù)據(jù)目的是為了比較result中type不同和result中參數(shù)的不同所產(chǎn)生的效果如果查詢的是所有的數(shù)據(jù)，在action中定義的類型如下：privateListentities;publicListgetEntities(){returnentities;}1．第一種：在xml文件中如果沒有param，內(nèi)容如下：

2、esulttype="json"/>它得到的是json數(shù)據(jù)，但是autocomplete解析不出這樣的json格式，所以讀取不出來，結(jié)果為：{"entities":[{"id":2,"name":"老王","price":222.0},{"id":1,"name":"老王","price":222.0},{"id":3,"name":"老王","price":222.0},{"id":4,"name":"老王","price":222.0},{"id":5,"name":"老王","price":222.0}].2．第二種：如果加上param

3、的name為多的那個(gè)對(duì)象，則可以返回的是json數(shù)據(jù)entities返回的數(shù)據(jù)為：[{"id":2,"name":"老王","price":222.0},{"id":1,"name":"老王","price":222.0},{"id":3,"name":"老王","price":222.0},{"id":4,"name":"

4、老王","price":222.0},{"id":5,"name":"老王","price":222.0}]可見返回的是json數(shù)據(jù)，并且在智能提示中可以提取出來，可以得知：entities的意思是從根節(jié)點(diǎn)為entities的開始遍歷，所有看到的數(shù)據(jù)就是json數(shù)據(jù)了。1．如果在action中封裝的是一個(gè)實(shí)體，也就是查詢的是一條數(shù)據(jù)，則代碼為：privateGoodsentity;publicGoodsgetEntity(){returnentity;}響應(yīng)的數(shù)據(jù)為：{"entity":{"id":1,"na

5、me":"老王2","price":222.0}}2．如果加上param參數(shù)，則返回的是entity結(jié)果為：{"id":1,"name":"老王2","price":222.0}3．如果在action中的數(shù)據(jù)為：privateListentities;privateGoodsentity;publicList<

6、Goods>getEntities(){returnentities;}publicGoodsgetEntity(){returnentity;}在xml文件中的數(shù)據(jù)為：entity則返回的只是entity對(duì)應(yīng)的實(shí)體{"id":1,"name":"老王2","price":222.0}1．如果為：

7、oods"class="cn.csdn.hr.action.GoodsAction">entities則返回的只是entities的實(shí)體，為[{"id":2,"name":"老王","price":222.0},{"id":1,"name":"老王","price":222.0},{"id":3,"name":"老王","price":222.0},{"id":4,"name":"老王","price":222.0},{"id":5,"

8、name":"老王","price":