如何在 Java 中将 String 转换为 jsonObject？
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How to convert String to jsonObject in Java?
提问by Java
This is string from jsonObject
这是来自 jsonObject 的字符串
{"no":1000,"name":"xxx","code":345}
I want convert to this string to JSONObject. Code here
我想将此字符串转换为 JSONObject。代码在这里
try {
URL url = new URL("http://localhost:8090/search?numer="+no);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Accept", "application/json");
if (conn.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : "+ conn.getResponseCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));
String output ;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);//output:{"no":1000,"name":"xxx","code":345}
}
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
回答by Prabhav
Step 1: Add these two lines
第一步：添加这两行
JSONParser parser = new JSONParser();
JSONObject json = (JSONObject) parser.parse(output);
Step 2: Add below dependency to pom.xml
第 2 步：将以下依赖项添加到 pom.xml
<!-- https://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple -->
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1</version>
</dependency>
回答by Hyman Flamp
I have used Hymanson. Example here: https://www.mkyong.com/java/Hymanson-2-convert-java-object-to-from-json/
我用过Hyman逊。这里的例子：https: //www.mkyong.com/java/Hymanson-2-convert-java-object-to-from-json/
Create a POJO. I don't know what the type is but since it has name as field nameI will call it User.
创建一个 POJO。我不知道类型是什么，但由于它有名称作为字段，name我将称之为User。
public class User {
private int no;
private String name;
private int code;
//getters setters
}
Then something like this:
然后是这样的：
User user = mapper.readValue(output, User.class);
