Spring MVC在接收集合请求参数时,需要在Controller方法的集合参数里前添加@RequestBody,而@RequestBody默认接收的enctype (MIME编码)是application/json,因此发送POST请求时需要设置请求报文头信息,否则Spring MVC在解析集合请求参数时不会自动的转换成JSON数据再解析成相应的集合。以下列举接收List<String>、List<User>、List<Map<String,Object>>、User[]、User(bean里面包含List)几种较为复杂的集合参数示例:
第一种类型:直接接收list 接收List<String>集合参数
前台通过ajax传输数据
var allFilePaths = new Array();
for (var i = 0; i < 10; i++) {
allFilePaths.push("xx"+i);
}
$.ajax({
url : url,
type : 'POST',
dataType: 'json',
contentType: "application/json", //ajax默认是application/x-www-form-urlencoded 需要注意
data : JSON.stringify(allFilePaths),//转为json格式
success : function(col) {
}
},
error : function(col){
}
});
controller层
@RequestMapping("/delFileInfo")
@ResponseBody
public void delFileInfo(@RequestBody List<String> macroPath) throws IOException
{
for(String sPath :macroPath)
{
System.out.println(sPath);
}
}
第二种类型:把要传递的集合封装成一个List对象或其他,可以达到传递List的目的
js层: Order.delOrders({orderIds: $scope.ids}, function () { Flash.success('删除成功!'); $state.reload(); }); viewmodel层: public class ListObj { private List<String> orderIds ; public List<String> getOrderIds() { return orderIds; } public void setOrderIds(List<String> orderIds) { this.orderIds = orderIds; } } Controller层: @RequestMapping(value = "/delOrders") @ResponseBody public ViewData deleteOrders(@RequestBody ListObj orderIds, HttpServletRequest request) { ViewData viewData = new ViewData(); for (String orderId:orderIds.getOrderIds()){ System.out.println(orderId); } // String[] arr = orderIds.split(","); // ViewData viewData = adminOrderService.deleteOrders(Arrays.asList(arr),getLoginInfo(request)); return viewData; }
第三种类型:接收List<User>、User[]集合参数:
User实体类: public class User { private String name; private String pwd; //省略getter/setter } 页面js代码: var userList = new Array(); userList.push({name: "李四",pwd: "123"}); userList.push({name: "张三",pwd: "332"}); $.ajax({ type: "POST", url: "<%=path%>/catalog.do?fn=saveUsers", data: JSON.stringify(userList),//将对象序列化成JSON字符串 dataType:"json", contentType : 'application/json;charset=utf-8', //设置请求头信息 success: function(data){ … }, error: function(res){ … } }); Controller方法: @Controller @RequestMapping("/catalog.do") public class CatalogController { @RequestMapping(params = "fn=saveUsers") @ResponseBody public AjaxJson saveUsers(@RequestBody List<User> userList) { … } } 如果想要接收User[]数组,只需要把saveUsers的参数类型改为@RequestBody User[] userArray就行了。
第4种类型:接收List<Map<String,Object>>集合参数:
页面js代码(不需要User对象了): var userList = new Array(); userList.push({name: "李四",pwd: "123"}); userList.push({name: "张三",pwd: "332"}); $.ajax({ type: "POST", url: "<%=path%>/catalog.do?fn=saveUsers", data: JSON.stringify(userList),//将对象序列化成JSON字符串 dataType:"json", contentType : 'application/json;charset=utf-8', //设置请求头信息 success: function(data){ … }, error: function(res){ … } }); Controller方法: @Controller @RequestMapping("/catalog.do") public class CatalogController { @RequestMapping(params = "fn=saveUsers") @ResponseBody public AjaxJson saveUsers(@RequestBody List<Map<String,Object>> listMap) { … } }
第五种类型:接收User(bean里面包含List)集合参数:
User实体类: public class User { private String name; private String pwd; private List<User> customers;//属于用户的客户群 //省略getter/setter } 页面js代码: var customerArray = new Array(); customerArray.push({name: "李四",pwd: "123"}); customerArray.push({name: "张三",pwd: "332"}); var user = {}; user.name = "李刚"; user.pwd = "888"; user. customers = customerArray; $.ajax({ type: "POST", url: "<%=path%>/catalog.do?fn=saveUsers", data: JSON.stringify(user),//将对象序列化成JSON字符串 dataType:"json", contentType : 'application/json;charset=utf-8', //设置请求头信息 success: function(data){ … }, error: function(res){ … } }); Controller方法: @Controller @RequestMapping("/catalog.do") public class CatalogController { @RequestMapping(params = "fn=saveUsers") @ResponseBody public AjaxJson saveUsers(@RequestBody User u