将HashMap解析为Json

这是我正在尝试解析的HashMap:

HashMap map = new HashMap();  
map.put("bowser", "b=mozilla");  
map.put("car", "car=Ford");
map.put("model","model=Mustang");
map.put("Year", 2014);
map.put("dealer", "Dealer=AKHI");

首先我尝试了Gson,然后是Jackson,但他们都有一个共同的问题.他们将"="解析为"\ u003d"

ObjectMapper mapper = new ObjectMapper();

try {
    String json = mapper.writeValueAsString(map);
    System.out.println("---------------------Parsed HashMap---------------------------:"+json); 
}
catch (JsonGenerationException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} 
catch (JsonMappingException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}
catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

我得到的输出是:

--------------------- Parsed HashMap --------------------------- :{"经销商":"Dealer\u003dAKHI","car":"car\u003dFord","Year":2014,"model":"model\u003dMustang","bowser":"b\u003dmozilla"}

我已经浏览了很少的其他博客,并发现API中存在一个小问题,但是我们可以通过其他方法解决这个问题.