我有以下格式的POST查询字符串:
param1 = aaa&inners [0] [“innerParam”] = bbb&inners [1] [“innerParam”] = nnn
我需要轻松将其转换为地图或POJO。
public class pojo{
private String param1;
private List<OtherPojo> inners;//array is also ok
//getters etc
}
class OtherPojo{
private String innerParam.
//getters etc
}
我以为可以通过Jersey @BeanParam或其他方式完成,但不幸的是这是不可能的。所以我只有一个字符串,需要将其编译为map或pojo。请注意,我不清楚如何解析此构造
inners[0]["innerParam"]
我不想手动进行。因此,我需要将其解析为一行。
Pojo p=someHelper.compileToPojo(postString);// or map
使用哪个库(如果存在)?
最佳答案
您可以使用的库是:com.fasterxml.jackson
以及如何实现它:
public void checkAndSetChildValues(ObjectNode node, String field, String value, ObjectMapper mapper) {
int indexDot = field.indexOf('.');
if (indexDot > -1) {
String childFieldName = field.substring(0, indexDot);
ObjectNode child = node.with(childFieldName);
checkAndSetChildValues(child, field.substring(indexDot + 1), value, mapper);
} else {
try{
node.set(field, mapper.convertValue(value, JsonNode.class));
} catch(IllegalArgumentException ex){
logger.debug("could not parse value {} for field {}", value, field);
}
}
}
public Object parse(Class type, String entityString) throws UnsupportedEncodingException {
ObjectMapper mapper = mapperHolder.get();
ObjectNode node = mapper.createObjectNode();
Scanner s = new Scanner(entityString).useDelimiter("&|=");
while (s.hasNext()) {
String key = s.next();
String value = s.hasNext() ? URLDecoder.decode(s.next(), "UTF-8") : null;
checkAndSetChildValues(node, key, value, mapper);
}
Object result = mapper.convertValue(node, type);
return result;
}
因此,您应该能够实现自己的
javax.ws.rs.ext.MessageBodyReader
,请参见:https://jersey.java.net/documentation/latest/message-body-workers.html#d0e7151