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解決okhttp3提示java.lang.IllegalStateException:closed異常問題

更新時(shí)間：2025年07月16日 08:42:46 作者：一縷純氧

使用OkHttp3時(shí),response.body().string()只能調(diào)用一次,重復(fù)調(diào)用會(huì)導(dǎo)致流關(guān)閉異常,解決方法是保存響應(yīng)體內(nèi)容到變量或重新構(gòu)建Response對(duì)象,避免多次讀取

okhttp3提示java.lang.IllegalStateException:closed異常

使用okhttp3的response.body().string()時(shí)候提示java.lang.IllegalStateException: closed異常

原因?yàn)閛khttp3請(qǐng)求回調(diào)中response.body().string()只能有效調(diào)用一次，而我使用了兩次，所以在第二次時(shí)調(diào)用時(shí)提示已關(guān)閉流的異常。

		Response response = httpClient.newCall(request).execute();
        logger.info(response.body().string()); //一次
        Map<String,Object> resMap=objectMapper.readValue(response.body().string(),Map.class); //兩次

解決辦法

將返回的值保存在對(duì)象中，重復(fù)使用對(duì)象即可。(或者重新builder一個(gè)Response對(duì)象)

    public void pushOrder(RecordPushRequest pushRequest) throws Exception {
        //TODO:構(gòu)造builder
        Request.Builder builder = new Request.Builder()
                .url(URL)
                .header("Content_Type", "application/json");
        //TODO:構(gòu)造請(qǐng)求體
        RequestBody requestBody = RequestBody.create(MediaType.parse("application/json"),
                objectMapper.writeValueAsString(pushRequest));
        //TODO:構(gòu)造請(qǐng)求
        Request request = builder.post(requestBody).build();
        //TODO:發(fā)起請(qǐng)求
        Response response = httpClient.newCall(request).execute();
        String res = response.body().string();
//        logger.info(response.body().string()); //打印時(shí)重復(fù)使用了一次
        Map<String,Object> resMap=objectMapper.readValue(res,Map.class);
        logger.info("得到的響應(yīng)解析結(jié)果：{} ",resMap);
    }

深扒response.body().string()問題原因

查看源碼Response.class：

private final ResponseBody body;

發(fā)現(xiàn)body是一個(gè)ResponseBody 對(duì)象。繼續(xù)查看ResponseBody 類的源碼：

public abstract class ResponseBody implements Closeable

ResponseBody類實(shí)現(xiàn)Closeable接口，感覺有點(diǎn)找到問題的源泉了，繼續(xù)點(diǎn)進(jìn)去看看Closeable接口是干嘛的：

public interface Closeable extends AutoCloseable {

    /**
     * Closes this stream and releases any system resources associated
     * with it. If the stream is already closed then invoking this
     * method has no effect.
     *
     * <p> As noted in {@link AutoCloseable#close()}, cases where the
     * close may fail require careful attention. It is strongly advised
     * to relinquish the underlying resources and to internally
     * <em>mark</em> the {@code Closeable} as closed, prior to throwing
     * the {@code IOException}.
     *
     * @throws IOException if an I/O error occurs
     */
    public void close() throws IOException;
}

Closeable接口繼承AutoCloseable類，有一個(gè)close方法，官方標(biāo)注：“關(guān)閉此流并釋放與之關(guān)聯(lián)的任何系統(tǒng)資源。

如果流已關(guān)閉，則調(diào)用此方法無效。”大概就是這個(gè)原因了。所以不要多次調(diào)用response.body().string()；語句。