简单的gson对boolean转换的test(作为备注)

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GsonBooleanTest.java

package com.test;import java.io.IOException;import com.google.gson.Gson;import com.google.gson.GsonBuilder;import com.google.gson.JsonSyntaxException;import com.google.gson.TypeAdapter;import com.google.gson.stream.JsonReader;import com.google.gson.stream.JsonToken;import com.google.gson.stream.JsonWriter;/** * @author John Kenrinus Lee * @version 2016-08-19 */public class GsonBooleanTest {    public static void main(String[] args) {        Mod mod = null;        // see isTd        String xx1 = "{\"isTd\":\"0\", \"mDd\":\"hello\"}"; // false        String xx2 = "{\"isTd\":\"1\", \"mDd\":\"hello\"}"; // false        String xx3 = "{\"isTd\":true, \"mDd\":\"hello\"}"; // true        String xx4 = "{\"isTd\":\"true\", \"mDd\":\"hello\"}"; // true        String xx5 = "{\"isTd\":false, \"mDd\":\"hello\"}"; // false        String xx6 = "{\"isTd\":\"false\", \"mDd\":\"hello\"}"; // false        String xx7 = "{\"isTd\":1, \"mDd\":\"hello\"}"; // throw; if use adapter, then true        String xx8 = "{\"isTd\":0, \"mDd\":\"hello\"}"; // throw; if use adapter, then false        String xx9 = "{\"isTd\":\"Yes\", \"mDd\":\"hello\"}"; // false        String xx10 = "{\"isTd\":\"No\", \"mDd\":\"hello\"}"; // false        Gson gson = new Gson();        mod = gson.fromJson(xx1, Mod.class);        System.out.println(mod.isTd);        mod = gson.fromJson(xx2, Mod.class);        System.out.println(mod.isTd);        mod = gson.fromJson(xx3, Mod.class);        System.out.println(mod.isTd);        mod = gson.fromJson(xx4, Mod.class);        System.out.println(mod.isTd);        mod = gson.fromJson(xx5, Mod.class);        System.out.println(mod.isTd);        mod = gson.fromJson(xx6, Mod.class);        System.out.println(mod.isTd);        gson = new GsonBuilder().registerTypeAdapter(Mod.class, new TypeAdapter<Mod>() {            @Override            public void write(JsonWriter out, Mod value) throws IOException {                out.beginObject();                out.name("isTd").value(value.isTd);                out.name("mDd").value(value.mDd);                out.endObject();            }            @Override            public Mod read(JsonReader in) throws IOException {                if (in.peek() == JsonToken.NULL) {                    in.nextNull();                    return null;                }                in.beginObject();                final Mod mod = new Mod();                while (in.hasNext()) {                    switch (in.nextName()) {                        case "isTd":                            if (in.peek() == JsonToken.BOOLEAN) {                                mod.isTd = in.nextBoolean();                            } else if (in.peek() == JsonToken.NUMBER) {                                mod.isTd = in.nextInt() != 0;                            } else if (in.peek() == JsonToken.STRING) {                                String bool = in.nextString();                                try {                                    if (bool.equalsIgnoreCase("true") || bool.equalsIgnoreCase("yes")                                            || Integer.parseInt(bool) != 0) {                                        mod.isTd = true;                                    }                                } catch (Exception ignored) {                                   // Do nothing                                }                            } else {                                throw new JsonSyntaxException("Unknown type for isTd");                            }                            break;                        case "mDd":                            mod.mDd = in.nextString();                            break;                    }                }                in.endObject();                return mod;            }        }).create();        mod = gson.fromJson(xx7, Mod.class);        System.out.println(mod.isTd);        mod = gson.fromJson(xx8, Mod.class);        System.out.println(mod.isTd);        mod = gson.fromJson(xx9, Mod.class);        System.out.println(mod.isTd);        mod = gson.fromJson(xx10, Mod.class);        System.out.println(mod.isTd);    }}

Mod.java

public class Mod {    public boolean isTd;    public String mDd;}

php中0, 1, ios中Yes, No, 可能都算是boolean, 但在java的gson中转换失灵, 需要adapter.

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