private String toJson(Map<String, String> areas) {
JsonFactory f = new JsonFactory();
StringWriter out = new StringWriter();
try {
JsonGenerator g = f.createJsonGenerator(out);
ObjectMapper m = new ObjectMapper();
m.writeValue(g, areas);
return out.toString();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}1.这个 JsonFactory()是什么 怎么百度不到! 他有api可以看么?
2.ObjectMapper() 这个呢?
JsonFactory f = new JsonFactory();
StringWriter out = new StringWriter();
try {
JsonGenerator g = f.createJsonGenerator(out);
ObjectMapper m = new ObjectMapper();
m.writeValue(g, areas);
return out.toString();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}1.这个 JsonFactory()是什么 怎么百度不到! 他有api可以看么?
2.ObjectMapper() 这个呢?
解决方案 »
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