java - 从 Java servlet 中获取 Ajax 参数

Question

我的数据:

var test = {cars : []};

var cars = []
cars.push({
    "name" : "Ford",
    "year" : "2000"
});

    cars.push({
    "name" : "Audi",
    "year" : "2002"
});

test.cars = cars;   

var json = JSON.stringify(test);

$.get('/myservlet/', json, function(data) { // also tried .getJSON , .post
            alert('Success');                               
})

在 Java 中，我得到“json”变量作为参数键，但没有值。

public void doPost(...) // TRIED BOTH
public void doGet(HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException {           
    for(Object a : req.getParameterMap().keySet()) {
        System.out.println(a + " - " + req.getParameter((String)a));
    }
//prints out
{"cars":[{"name":"Ford","year":"30"},{"name":"Audi","year":"2002"}]} - 

这是不可用的结果，因为 key 总是在变化，而且每次都对参数进行 for 循环是荒谬的。我需要一个特定的 key :req.getParameter("cars")

Answer 1

将其更改为:

$.get('/myservlet/', 'cars='+ json, function(data) { // also tried .getJSON , .post
        alert('Success');