##Simple json tool
JSONparser is used to convert string to json object
parser 1
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Object obj = null;
try {
obj = parser.parse(new FileReader("C:/Users/Envy/Documents/company.json"));
} catch (Exception e) {
// Handle possible exceptions
e.printStackTrace();
}
// If the parsed string was a single json object
if (obj instanceof JSONObject) {
JSONObject jsonObject = (JSONObject) obj;
// Do something with jsonObject, in this example it prints the content of jsonObject
System.out.println(jsonObject);
}
// Or else if the parsed string was a json array
else if (obj instanceof JSONArray) {
JSONArray jsonArray = (JSONArray) obj;
// Do something with jsonArray, in this example it prints the content of jsonArray
System.out.println(jsonArray);
}
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convert the JASONObject to string
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JSONObject obj = new JSONObject();
obj.put("name","foo");
obj.put("num",100);
obj.put("balance",1000);
obj.put("is_vip",true);
StringWriter out = new StringWriter();
try {
obj.writeJSONString(out);
}catch(IOException e ){
System.out.println(e);
}
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##Spring boot framework -json support
references
http://json-b.net/docs/user-guide.html
spring boot support three different json libs
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| Spring Boot provides integration with three JSON mapping libraries:
Gson
Jackson
JSON-B
Jackson is the preferred and default library.
spring.http.converters.preferred-json-mapper=jsonb
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| @Bean
public Jackson2ObjectMapperBuilderCustomizer customJson()
{
return builder -> {
builder.indentOutput(true);
builder.propertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
};
}
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