通过 AJAX CALL 从 SPRING MVC 3 CONTROLLER 获取 JAVA LIST 到 JQUERY 的示例程序

发布于 2024-11-09 09:33:58 字数 749 浏览 0 评论 0原文

JQUERY：

$.ajax({
        datatype:"json",
        url:"<%=request.getContextPath()%>/appendStudentView.page",
    type: 'post',
    success: function(data, status) {
        alert("status=="+data)
        },
    error: function(xhr, desc, err) {
        alert("xhr=="+xhr+"Desc: " + desc + "\nErr:" + err);
        }
    });

SPRING CONTROLLER

/**
 * Handles request for adding two numbers
 */
@RequestMapping(value = "/appendStudentView.page")
public @ResponseBody String appendStudentField() {

    List xx=new ArrayList();
    xx.add("CONTROLLER");
return xx;
}

我正在通过 JQUERY AJAX 调用appendStudentField() 方法并返回一个列表。我没有在 AJAX 调用的响应中获取列表 xx。

请帮助它。

谢谢兰迪

原文

JQUERY:

$.ajax({
        datatype:"json",
        url:"<%=request.getContextPath()%>/appendStudentView.page",
    type: 'post',
    success: function(data, status) {
        alert("status=="+data)
        },
    error: function(xhr, desc, err) {
        alert("xhr=="+xhr+"Desc: " + desc + "\nErr:" + err);
        }
    });

SPRING CONTROLLER

/**
 * Handles request for adding two numbers
 */
@RequestMapping(value = "/appendStudentView.page")
public @ResponseBody String appendStudentField() {

    List xx=new ArrayList();
    xx.add("CONTROLLER");
return xx;
}

I am calling the appendStudentField() method through JQUERY AJAX and returning a list .I am not getting the List xx in the response of the AJAX Call.

Kindly help it .

Thx
Randy

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熊抱啵儿 2024-11-16 09:33:58

你的类路径上有 Jackson 吗？ Spring需要Jackson来输出JSON。

该标签注册
DefaultAnnotationHandlerMapping 和
AnnotationMethodHandlerAdapter bean
Spring MVC 所需的
将请求分派给@Controllers。这
标签配置这两个 bean
合理的默认值基于什么
存在于你的类路径中。这
默认值是：
...
支持读写 JSON，
如果杰克逊在场
类路径。

来源：
配置 Spring MVC> 15.12.1。 mvc:注解驱动

回复收藏 0 原文

夜雨飘雪 2024-11-16 09:33:58

难道你不能只使用模型并以这种方式传递变量吗？这是我使用的代码示例。

@Controller
@Scope("prototype")
@RequestMapping("/favorites")
public class FavoritesController {

    protected final Log logger = LogFactory.getLog(getClass());

    @Autowired
    FavoriteService favoriteService;

        @RequestMapping(method = RequestMethod.POST)
        public void handle(String circuit, String customer, String action, Model model) {

        String userid = SecurityContextHolder.getContext().getAuthentication().getName();

        List<Map<String, String>> favorites = null;

        if (action.equals("save")) {
            favoriteService.setFavorite(userid, circuit, customer);
            favorites = favoriteService.getFavorites(userid);
        }

        if (action.equals("delete")) {
            favoriteService.deleteFavorite(userid, circuit);
            favorites = favoriteService.getFavorites(userid);
        }

        model.addAttribute("userid", userid);
        model.addAttribute("circuit", circuit);
        model.addAttribute("customer", customer);
        model.addAttribute("favorites", favorites);
    }
}

[编辑以添加其中的 jquery 部分]

   // **************************************** 
//  SAVE TO FAVORITES 
// ****************************************
$("#save-to-favorite").live("click", function() {
    var saveCircuit = $(this).attr('circuit');
    var saveCustomer = $(this).attr('customer');

    var data = "action=save&circuit=" + saveCircuit + "&customer=" + saveCustomer;
    $.ajax( {
        type : "POST",
        url : "favorites.html",
        data : data,
        success : function(xhr) {
            $("#favorite-list").html(xhr);
        },
        error : function(xhr) {
            var response = xhr.responseText;
            response = response.replace(/<html>.+<body>/i, "")
            response = response.replace(/<\/body><\/html>/i, "")

            alert(response);
        }
    });
});

// ****************************************
// DELETE FROM FAVORITES
// ****************************************
$(".delete-favorite-icon").live("click", function() {
    var deleteCircuit = $(this).attr('circuit');

    var data = "action=delete&circuit=" + deleteCircuit;
    $.ajax( {
        type : "POST",
        url : "favorites.html",
        data : data,
        success : function(xhr) {
            $("#favorite-list").html(xhr);
        },
        error : function(xhr) {
            var response = xhr.responseText;
            response = response.replace(/<html>.+<body>/i, "")
            response = response.replace(/<\/body><\/html>/i, "")

            alert(response);
        }
    });
});

Couldn't you just use a Model and pass your variables that way? Here is an example bit of code I use.

@Controller
@Scope("prototype")
@RequestMapping("/favorites")
public class FavoritesController {

    protected final Log logger = LogFactory.getLog(getClass());

    @Autowired
    FavoriteService favoriteService;

        @RequestMapping(method = RequestMethod.POST)
        public void handle(String circuit, String customer, String action, Model model) {

        String userid = SecurityContextHolder.getContext().getAuthentication().getName();

        List<Map<String, String>> favorites = null;

        if (action.equals("save")) {
            favoriteService.setFavorite(userid, circuit, customer);
            favorites = favoriteService.getFavorites(userid);
        }

        if (action.equals("delete")) {
            favoriteService.deleteFavorite(userid, circuit);
            favorites = favoriteService.getFavorites(userid);
        }

        model.addAttribute("userid", userid);
        model.addAttribute("circuit", circuit);
        model.addAttribute("customer", customer);
        model.addAttribute("favorites", favorites);
    }
}

[Edited to add the jquery portion of this]

   // **************************************** 
//  SAVE TO FAVORITES 
// ****************************************
$("#save-to-favorite").live("click", function() {
    var saveCircuit = $(this).attr('circuit');
    var saveCustomer = $(this).attr('customer');

    var data = "action=save&circuit=" + saveCircuit + "&customer=" + saveCustomer;
    $.ajax( {
        type : "POST",
        url : "favorites.html",
        data : data,
        success : function(xhr) {
            $("#favorite-list").html(xhr);
        },
        error : function(xhr) {
            var response = xhr.responseText;
            response = response.replace(/<html>.+<body>/i, "")
            response = response.replace(/<\/body><\/html>/i, "")

            alert(response);
        }
    });
});

// ****************************************
// DELETE FROM FAVORITES
// ****************************************
$(".delete-favorite-icon").live("click", function() {
    var deleteCircuit = $(this).attr('circuit');

    var data = "action=delete&circuit=" + deleteCircuit;
    $.ajax( {
        type : "POST",
        url : "favorites.html",
        data : data,
        success : function(xhr) {
            $("#favorite-list").html(xhr);
        },
        error : function(xhr) {
            var response = xhr.responseText;
            response = response.replace(/<html>.+<body>/i, "")
            response = response.replace(/<\/body><\/html>/i, "")

            alert(response);
        }
    });
});

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