在这篇文章中，我们将从性能的角度比较两个著名的 JSON 特定 API，即 Gson 和 Jackson：

代码

包装纸

此类用于转换为 JSON

 public class MeasurementRecord {
private String measurementId;
private long duration;
private long time;
private MeasurementType type=MeasurementType.METHOD_CALL;
/**
*

@param measurementId
@param duration
@param time
@param type
*/
public MeasurementRecord(String measurementId, long duration, long time,
MeasurementType type) {
super();
this.measurementId = measurementId;
this.duration = duration;
this.time = time;
this.type = type;
}
//getters and setters
}

public enum MeasurementType {
WEB_REQUEST,SQL,EXCEPTION,METHOD_CALL
}

创建列表的代码

 public class MeasurementRecord {
private String measurementId;
private long duration;
private long time;
private MeasurementType type=MeasurementType.METHOD_CALL;
/**
*

@param measurementId
@param duration
@param time
@param type
*/
public MeasurementRecord(String measurementId, long duration, long time,
MeasurementType type) {
super();
this.measurementId = measurementId;
this.duration = duration;
this.time = time;
this.type = type;
}
//getters and setters
}

public enum MeasurementType {
WEB_REQUEST,SQL,EXCEPTION,METHOD_CALL
}

杰克逊API

 public class MeasurementRecord {
private String measurementId;
private long duration;
private long time;
private MeasurementType type=MeasurementType.METHOD_CALL;
/**
*

@param measurementId
@param duration
@param time
@param type
*/
public MeasurementRecord(String measurementId, long duration, long time,
MeasurementType type) {
super();
this.measurementId = measurementId;
this.duration = duration;
this.time = time;
this.type = type;
}
//getters and setters
}

public enum MeasurementType {
WEB_REQUEST,SQL,EXCEPTION,METHOD_CALL
}

开发者接口

 public class MeasurementRecord {
private String measurementId;
private long duration;
private long time;
private MeasurementType type=MeasurementType.METHOD_CALL;
/**
*

@param measurementId
@param duration
@param time
@param type
*/
public MeasurementRecord(String measurementId, long duration, long time,
MeasurementType type) {
super();
this.measurementId = measurementId;
this.duration = duration;
this.time = time;
this.type = type;
}
//getters and setters
}

public enum MeasurementType {
WEB_REQUEST,SQL,EXCEPTION,METHOD_CALL
}

结果

结论

对于中小型列表的转换，与 Jackson 相比，Gson 提供了更好的响应。对于大型列表，Jackson 提供了比 Gson 更好的响应。基于这一结果，我们可以得出结论，为了将中小型列表转换为 JSON，可以使用 Gson 以获得更好的性能。