使用杰克逊的ObjectMapper的JSON对象的顺序
使用杰克逊的ObjectMapper的JSON对象的顺序
提问于 2013-10-09 21:01:35
我正在使用ObjectMapper进行java-json映射。
ObjectWriter ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
ow.writeValue(new File( fileName +".json"), jsonObj);这是我的java类：
public class Relation {
private String id;
private String source;
private String target;
private String label;
private List<RelAttribute> attributes;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getSource() {
return source;
}
public void setSource(String source) {
this.source = source;
}
public String getTarget() {
return target;
}
public void setTarget(String target) {
this.target = target;
}
public String getLabel() {
return label;
}
public void setLabel(String label) {
this.label = label;
}
public void setAttributes(List<RelAttribute> attributes) {
this.attributes = attributes;
}
public List<RelAttribute> getAttributes() {
return attributes;
}
}这是我得到的：
{
"id" : "-75da69d3-79c8-4000-a3d8-b10350a57a7e",
"attributes" : [ {
"attrName" : "ID",
"attrValue" : ""
}, {
"attrName" : "Description",
"attrValue" : "Primary Actor"
}, {
"attrName" : "Status",
"attrValue" : ""
} ],
"label" : "new Label",
"target" : "-46b238ac-b8b3-4230-b32c-be9707f8b691",
"source" : "-daa34638-061a-45e0-9f2e-35afd6c271e0"
}所以我现在的问题是，我如何才能获得这个json输出：
{
"id" : "-75da69d3-79c8-4000-a3d8-b10350a57a7e",
"label" : "new Label",
"target" : "-46b238ac-b8b3-4230-b32c-be9707f8b691",
"source" : "-daa34638-061a-45e0-9f2e-35afd6c271e0",
"attributes" : [ {
"attrName" : "ID",
"attrValue" : ""
}, {
"attrName" : "Description",
"attrValue" : "Primary Actor"
}, {
"attrName" : "Status",
"attrValue" : ""
} ]
}我希望它的顺序与我的java声明中的顺序相同。有没有一种方法来指定它？也许用注解或类似的东西？
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原文链接：
https://stackoverflow.com/questions/19272830
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