springmvc使用jQuery.datatable时遇到的错误

springmvc使用jQuery.datatable时遇到的错误

 1正确时返回 josn结果：

 {"aaData":[{"age":,"id":,"name":"wwecs","sex":"man"},{"age":,"id":,"name":"second","sex":"man"},{"age":,"id":,"name":"secondone","sex":"man"},{"age":,"id":,"name":"thridone","sex":"man"},{"age":,"id":,"name":"eeeeee","sex":"man"},{"age":,"id":,"name":"t80aaa","sex":"man"},{"age":,"id":,"name":"test0001","sex":"man"}],"iTotalDisplayRecords":,"iTotalRecords":,"sEcho":""}

   页面显示处理中（processing），列表空白，其实有返回数据，josn结果：
 {"aaData":[{\"age\":31,\"id\":100000,\"name\":\"wwecs\",\"sex\":\"man\"},{\"age\":1,\"id\":100001,\"name\":\"second\",\"sex\":\"man\"},{\"age\":2,\"id\":100002,\"name\":\"secondone\",\"sex\":\"man\"},{\"age\":3,\"id\":100003,\"name\":\"thridone\",\"sex\":\"man\"},{\"age\":3,\"id\":100004,\"name\":\"eeeeee\",\"sex\":\"man\"},{\"age\":32,\"id\":100005,\"name\":\"t80aaa\",\"sex\":\"man\"},{\"age\":100,\"id\":100006,\"name\":\"test0001\",\"sex\":\"man\"}],"iTotalDisplayRecords":10,"iTotalRecords":10,"sEcho":""}

  同上一致
 {"aaData":"[{"age":31,"id":100000,"name":"wwecs","sex":"man"},{"age":1,"id":100001,"name":"second","sex":"man"},{"age":2,"id":100002,"name":"secondone","sex":"man"},{"age":3,"id":100003,"name":"thridone","sex":"man"},{"age":3,"id":100004,"name":"eeeeee","sex":"man"},{"age":32,"id":100005,"name":"t80aaa","sex":"man"},{"age":100,"id":100006,"name":"test0001","sex":"man"}]","iTotalDisplayRecords":,"iTotalRecords":,"sEcho":""}

 A1  提示“ DataTables warning (table id = 'example1'): Cannot reinitialise DataTable. To retrieve the DataTables object for this table, pass no arguments or...” 时
 A2  或者提示“  DataTables warning(table id='example1'):Requested unknown parameter '1' from the data source for row 0”

 时返回的json结果：

 {"aaData":"[{\"age\":31,\"id\":100000,\"name\":\"wwecs\",\"sex\":\"man\"},{\"age\":1,\"id\":100001,\"name\":\"second\",\"sex\":\"man\"},{\"age\":2,\"id\":100002,\"name\":\"secondone\",\"sex\":\"man\"},{\"age\":3,\"id\":100003,\"name\":\"thridone\",\"sex\":\"man\"},{\"age\":3,\"id\":100004,\"name\":\"eeeeee\",\"sex\":\"man\"},{\"age\":32,\"id\":100005,\"name\":\"t80aaa\",\"sex\":\"man\"},{\"age\":100,\"id\":100006,\"name\":\"test0001\",\"sex\":\"man\"}]","iTotalDisplayRecords":,"iTotalRecords":,"sEcho":""}

附加去掉   “\”  和“[” "]"的方法：

             returnstr=returnstr.replaceAll("\\\\", "");
             returnstr = returnstr.replace(Matcher.quoteReplacement("]\""), "]");
             returnstr = returnstr.replace(Matcher.quoteReplacement("\"["), "[");

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