2017.07.07
報錯信息
com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "conditionQuantity" (class objectMapper.NewInteger), not marked as ignorable (7 known properties: "reduceFee", "perReduceFee", "priority", "match", "reduceDiscount", "conditionFee", "per"])
at [Source: [{"conditionQuantity":30,"reduceDiscount":90.5,"priority":1}]; line: 1, column: 25] (through reference chain: java.util.ArrayList[0]->objectMapper.NewInteger["conditionQuantity"])
一直顯示的錯誤是沒有匹配的conditionQuantity字段
Class源碼
public class NewInteger implements Serializable{
private static final long serialVersionUID = 4878434867152140447L;
private Long conditionFee;
private Long per;
private Long perReduceFee;
private Integer conditionQuantity;
private Long reduceFee;
private Integer reduceDiscount;
private Integer priority;
private Boolean isMatch;
}
很明顯class類中是有conditionQuantity字段的，于是思考過去成功的案例鞭铆。
發(fā)現(xiàn)唯一失敗的可能就是沒有設(shè)置setter和getter方法或衡。
于是修改class類的代碼。
修改后Class
public class NewInteger implements Serializable{
private static final long serialVersionUID = 4878434867152140447L;
private Long conditionFee;
private Long per;
private Long perReduceFee;
private Integer conditionQuantity;
private Long reduceFee;
private Integer reduceDiscount;
private Integer priority;
private Boolean isMatch;
public Long getConditionFee() {
return conditionFee;
}
public void setConditionFee(Long conditionFee) {
this.conditionFee = conditionFee;
}
public Long getPer() {
return per;
}
public void setPer(Long per) {
this.per = per;
}
public Long getPerReduceFee() {
return perReduceFee;
}
public void setPerReduceFee(Long perReduceFee) {
this.perReduceFee = perReduceFee;
}
public Integer getConditionQuantity() {
return conditionQuantity;
}
public void setConditionQuantity(Integer conditionQuantity) {
this.conditionQuantity = conditionQuantity;
}
public Long getReduceFee() {
return reduceFee;
}
public void setReduceFee(Long reduceFee) {
this.reduceFee = reduceFee;
}
public Integer getReduceDiscount() {
return reduceDiscount;
}
public void setReduceDiscount(Integer reduceDiscount) {
this.reduceDiscount = reduceDiscount;
}
public Integer getPriority() {
return priority;
}
public void setPriority(Integer priority) {
this.priority = priority;
}
public Boolean getMatch() {
return isMatch;
}
public void setMatch(Boolean match) {
isMatch = match;
}
}
ObjectMapper解析代碼
public class ObejctMapperTest {
public List<NewInteger> parse() throws IOException {
ObjectMapper objectMapper = new ObjectMapper();
String json = "[{\"conditionQuantity\":30,\"reduceDiscount\":90.5,\"priority\":1}]";
return objectMapper.readValue(json, new TypeReference<List<NewInteger>>(){});
}
public static void main(String[] args) {
ObejctMapperTest run = new ObejctMapperTest();
try {
System.out.println("before parse");
List<NewInteger> result = run.parse();
System.out.println(result.get(0).getReduceDiscount());
} catch (IOException e) {
System.out.println("catch parse error");
System.out.println(e.toString());
}
}
}
[解析結(jié)果]
解析結(jié)果
從結(jié)果來看车遂，很明顯踩到另一個坑了封断。
在拿Integer類型的字段reduceDiscount時，相對的實(shí)際參數(shù)是90.5舶担，這種情況下缤苫，objectMapper并不會報錯猴凹，而是直接精度丟失了。
