直接在方法上使用List<Bean>报不能实例化错误！
必须将List<Bean>放在某个对象里作为属性方可接收。具体见如下例子
前端代码
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>page</title> </head> <body> <h1>数组传参数测试</h1> <script src="/webpagetest/js/jquery-2.0.3.min.js"></script> <script type="text/javascript"> function test() { $.ajax({ url:‘/webpagetest/pageData‘, data:{ ‘id‘:1, ‘order[0].column‘:‘name‘, ‘order[0].dir‘:‘asc‘, ‘order[1].column‘:‘phone‘, ‘order[1].dir‘:‘desc‘ }, success:function (rt) { alert(rt); }, error:function () { alert(‘error‘); } }); } function test2() { $.ajax({ url:‘/webpagetest/pageData2‘, data:{ ‘id‘:1, ‘order[0][column]‘:‘name‘, ‘order[0][dir]‘:‘asc‘, ‘order[1][column]‘:‘phone‘, ‘order[1][dir]‘:‘desc‘ }, success:function (rt) { alert(rt); }, error:function () { alert(‘error‘); } }); } </script> <button onclick="test()">测试</button> <button onclick="test2()">测试2</button> </body> </html>
后台代码
@RequestMapping("/pageData")
@ResponseBody
public String index(@RequestParam(value="order[0].column",required = false) String order0column,
HttpServletRequest request,
MyVO vo){
System.out.println("获取单个参数：");
System.out.println(order0column);
System.out.println("获取所有参数：");
Map<String,String[]> params = request.getParameterMap();
for(Map.Entry<String,String[]> entry:params.entrySet()){
System.out.println("key:"+entry.getKey()+" value:"+ Arrays.asList(entry.getValue()));
}
System.out.println("获取VO");
System.out.println("id:"+vo.getId());
System.out.println("orders:");
for(Order o:vo.getOrder()) {
System.out.println("column:" + o.getColumn()+" dir:"+o.getDir());
}
return "ok";
}
@RequestMapping("/pageData2")
@ResponseBody
public String index(@RequestParam(value="order[0][column]",required = false) String order0column,
HttpServletRequest request /*,
MyVO2 vo2*/){
System.out.println("获取单个参数：");
System.out.println(order0column);
System.out.println("获取所有参数：");
Map<String,String[]> params = request.getParameterMap();
for(Map.Entry<String,String[]> entry:params.entrySet()){
System.out.println("key:"+entry.getKey()+" value:"+ Arrays.asList(entry.getValue()));
}
// System.out.println("获取VO2");
// System.out.println("id:"+vo2.getId());
// System.out.println("orders:");
// for(List<String> o:vo2.getOrder()) {
// System.out.println("column:" + o.get(0)+" dir:"+o.get(1));
// }
return "ok";
}
两个实体对象（必须是独立的文件中的类，否则一直报找不到构造函数的错误）
public class MyVO{ private int id; private List<Order> order = new ArrayList<Order>(); public int getId() { return id; } public void setId(int id) { this.id = id; } public List<Order> getOrder() { return order; } public void setOrder(List<Order> order) { this.order = order; } }
public class Order{ private String column; private String dir; public String getColumn() { return column; } public void setColumn(String column) { this.column = column; } public String getDir() { return dir; } public void setDir(String dir) { this.dir = dir; } }
原文：https://www.cnblogs.com/hdwang/p/9122877.html