在 Java 中转义 JSON 字符串
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Escape JSON string in Java
提问by Tombart
I'm using Google's com.google.api.client.json.GenericJsonand com.fasterxml.Hymanson.core.JsonGenerator. I would like to serialize JSON object and escape quotes and backslashes so that I can pass that string in Bash. And afterwards deserialize that string.
我正在使用 Googlecom.google.api.client.json.GenericJson和com.fasterxml.Hymanson.core.JsonGenerator. 我想序列化 JSON 对象并转义引号和反斜杠，以便我可以在 Bash 中传递该字符串。然后反序列化该字符串。
GenericJson.toStringproduces simple JSON, but \netc. are not escaped:
GenericJson.toString产生简单的 JSON，但\n等不会被转义：
{commands=ls -laF\ndu -h, id=0, timeout=0}
is there a simple way how to get something like this:
有没有一种简单的方法来获得这样的东西：
"{commands=\"ls -laF\ndu -h\", id=0, timeout=0}"
I don't want to reinvent the wheel, so I'd like to use Hymanson or an existing API, if possible.
我不想重新发明轮子，所以如果可能的话，我想使用 Hymanson 或现有的 API。
采纳答案by Barett
No additional dependencies needed: You're looking for JsonStringEncoder#quoteAsString(String).
不需要额外的依赖项：您正在寻找JsonStringEncoder#quoteAsString(String).
Click for JsonStringEncoder javadoc
Example:
例子：
import com.fasterxml.Hymanson.core.io.JsonStringEncoder;
JsonStringEncoder e = JsonStringEncoder.getInstance();
String commands = "ls -laF\ndu -h";
String encCommands = new String(e.quoteAsString(commands));
String o = "{commands: \"" + encCommands + "\", id: 0, timeout: 0}"
参考：http: //fasterxml.github.io/Hymanson-core/javadoc/2.1.0/com/fasterxml/Hymanson/core/io/JsonStringEncoder.html
回答by Tombart
Using Gsonfor serialization proved to be quite easy and bulletproof. Afterwards Apache's commons-lang3 = 3.1escapeEcmaScriptis used. In 3.2there's also escapeJsonmethod.
使用Gson序列化被证明是很容易的，防弹。之后使用Apache的commons-lang3 = 3.1escapeEcmaScript。在3.2这里还有escapeJson方法。
import com.google.api.client.json.GenericJson;
import com.google.api.client.util.Key;
import com.google.gson.Gson;
import org.apache.commons.lang3.StringEscapeUtils;
public class MyJson extends GenericJson {
@Key("commands")
public String commands;
public String serialize() throws IOException {
Gson gson = new Gson();
String g = gson.toJson(this);
return StringEscapeUtils.escapeEcmaScript(g);
}
}
This produces escaped JSON:
这会产生转义的 JSON：
{\"commands\":\"ls -laF\ndu -h\"}
Deserialization is then quite simple:
反序列化非常简单：
protected MyJson deserialize(String str) throws IOException {
String json = StringEscapeUtils.unescapeEcmaScript(str);
JsonObjectParser parser = (new HymansonFactory()).createJsonObjectParser();
return parser.parseAndClose(new StringReader(json), MyJson.class);
}
The escapeEcmaScriptmethod isn't complicated, it does following replacement:
该escapeEcmaScript方法并不复杂，它做了以下替换：
{"'", "\'"},
{"\"", "\\""},
{"\", "\\"},
{"/", "\/"}
But at least is something I don't have to care about.
但至少是我不必关心的事情。
