GSON issue with String | 易学教程

问题

    String s = "m\\"+"/m\\/m/m/m/m/m";

    LinkedHashMap<String, String> hm = new LinkedHashMap<>();

    hm.put("test", s);

    System.out.println(hm+"  Hash map = "+hm.toString());

Fine Output is {test=m\/m\/m/m/m/m/m} Hash map = {test=m\/m\/m/m/m/m/m}

    String s2 = new Gson().toJson(hm.toString());

    System.out.println("Json result is "+s2);

Not Fine Output is Json result is "{test\u003dm\\/m\\/m/m/m/m/m}"

Is GSON going mad or is it something that I am doing wrong? What is happening to with Back Slashes and from where does this u003d appears? I knew that there exists a bug of this nature a long time ago but it was resolved. How can I resolve this issue? Thanks in advance.

回答1:

The = sign is encoded to \u003d. Hence you need to use disableHtmlEscaping().

You can use

Gson gson = new GsonBuilder().disableHtmlEscaping().create();
String s2 = gson.toJson(hm.toString());

For \/ turning into \\/ issue, the solution is

s2.replace("\\\\", "\\");

回答2:

Since some people like to nitpick, I'll add the answer to the question (even though it was already answered and chosen as the correct answer) ...

I agree with the chose answer to this question, use the following code:

Gson gson = new GsonBuilder().disableHtmlEscaping().create();
String s2 = gson.toJson(hm.toString());
s2.replace("\\\\", "\\");

@Bajrang Hudda has asked about \n ... I hit this issue recently ... I was able to solve it using:

Gson gson = new Gson();
String json = (gson.toJson(data)).replaceAll("\\\\n", "\\n");

来源：https://stackoverflow.com/questions/16558709/gson-issue-with-string

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java

gson

linkedhashmap