獲取java.io.IOException：服務器返回的HTTP響應代碼：URL為400，但可以在瀏覽器中正常訪問

Question

我嘗試傳遞的參數是“ Submitted_By：test2或Submitted_By：test”。 如果我將確切的URL復制並粘貼到錯誤消息中，則可以正常訪問該URL。 當傳遞諸如“ Submitted_By：test2”之類的參數時，它可以正常工作，但是在添加“ OR”時，它將引發錯誤。 有任何想法嗎？

12:51:53,246 ERROR [stderr] (default task-1) java.io.IOException: Server returned HTTP response code: 400 for URL: http://localhost:1234/solr/STINGRA/select/?q=Submitted_By:test2 OR Submitted_By:test&fl=Submission_ID,Submitted_By,File_Name,TOT&version=2.2&start=0&rows=50&indent=on&wt=xml&callback=?&json.wrf=on_data
12:51:53,247 ERROR [stderr] (default task-1)    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1839)
12:51:53,247 ERROR [stderr] (default task-1)    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1440)
12:51:53,247 ERROR [stderr] (default task-1)    at java.net.URL.openStream(URL.java:1038)
12:51:53,247 ERROR [stderr] (default task-1)    at webapp.Search.getResultsBeta(Search.java:144)
12:51:53,247 ERROR [stderr] (default task-1)    at webapp.WebappController.searchResultsBeta(WebappController.java:87)
12:51:53,248 ERROR [stderr] (default task-1)    at webapp.WebappController$$FastClassBySpringCGLIB$$b0db6f6a.invoke(<generated>)

它引用的行144是所提供的代碼段中的最后一行。 Search.getResultsBeta方法：

public static Integer[] getResultsBeta(String query) {
    String inputLine;
    ArrayList<Integer> subId = new ArrayList<>();
    int numOfResults = 0;
    try {
        URL temp;
        temp = new URL("http://localhost:1234/solr/STINGRA/select/?q=" + query + "&fl=Submission_ID,Submitted_By,File_Name,TOT&version=2.2&start=0&rows=50&indent=on&wt=xml&callback=?&json.wrf=on_data");
        BufferedReader in;
        InputStreamReader sr = new InputStreamReader(temp.openStream());

Answer 1

您應該使用url = url.replaceAll(" ", "%20");空格編碼為'％20' url = url.replaceAll(" ", "%20");

Answer 2

通過編碼查詢變量解決了該問題。

更改我的代碼從：

URL temp;
temp = new URL("http://localhost:1234/solr/STINGRA/select/?q=" + query + "&fl=Submission_ID,Submitted_By,File_Name,TOT&version=2.2&start=0&rows=50&indent=on&wt=xml&callback=?&json.wrf=on_data");

對此：

URL temp;
query = URLEncoder.encode(query);
temp = new URL("http://localhost:1234/solr/STINGRA/select/?q=" + query + "&fl=Submission_ID,Submitted_By,File_Name,TOT&version=2.2&start=0&rows=50&indent=on&wt=xml&callback=?&json.wrf=on_data");