错误 com.fasterxml.jackson.core.JsonParseException:无法识别的令牌
Error com.fasterxml.jackson.core.JsonParseException: Unrecognized token
试图读取一个JSON文件并将其序列化为java对象,我写了一个方法:
public static PostPojo readFile(String titleFile){
String pathJSONFile = "src/main/resources/"+titleFile+".json";
ObjectMapper objectMapper = new ObjectMapper();
try {
objectMapper.readValue(pathJSONFile,PostPojo.class);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return postPojo;
}
但它产生错误:
com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'src': was expecting (JSON
String, Number, Array, Object or token 'null', 'true' or 'false')
at [Source: (String)"src/main/resources/ninetyNinthPost.json"; line: 1, column: 4]
at utils.ApiUtils.readFile(ApiUtils.java:71)
at ApiApplicationRequest.getValue(ApiApplicationRequest.java:31)
我的 JSON 计算值的文件
[ {
"userId" : 10,
"id" : 99,
"title" : "temporibus sit alias delectus eligendi possimus magni",
"body" : "quo deleniti praesentium dicta non quod\naut est
molestias\nmolestias et officia quis nihil\nitaque dolorem quia"
} ]
我的java对象class
public class PostPojo {
private int userId;
private int id;
private String title;
private String body;
public PostPojo() {
}
public PostPojo(int userId, int id, String title, String body) {
this.userId = userId;
this.id = id;
this.title = title;
this.body = body;
}
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getBody() {
return body;
}
public void setBody(String body) {
this.body = body;
}
@Override
public String toString() {
return "PostModel{" +
"userId=" + userId +
", id=" + id +
", title='" + title + '\'' +
", body='" + body + '\'' +
'}';
}
}
我真的不明白什么是reason.As我明白了,在文档中阅读,它应该读取文件并将其呈现在java class中。有什么建议吗?
没有方法签名应该获取文件路径作为第一个参数。您可以传递一个 JSON 字符串作为第一个参数,或者您可以使用带有文件对象的方法签名作为第一个参数,如下所示:
public static PostPojo[] readFile(String titleFile){
String pathJSONFile = "src/main/resources/"+titleFile+".json";
ObjectMapper objectMapper = new ObjectMapper();
File jsonFile = new File(pathJSONFile);
PostPojo[] postPojo = null;
try {
postPojo = objectMapper.readValue(jsonFile, PostPojo[].class);
} catch (IOException e) {
e.printStackTrace();
}
return postPojo;
}
编辑:由于您的文件在对象周围定义了一个包装数组,因此您必须将其解析为数组。之后你可以 return 它作为一个数组,就像我在我编辑的答案中所做的那样,或者你只是 return 第一个数组记录。
试图读取一个JSON文件并将其序列化为java对象,我写了一个方法:
public static PostPojo readFile(String titleFile){
String pathJSONFile = "src/main/resources/"+titleFile+".json";
ObjectMapper objectMapper = new ObjectMapper();
try {
objectMapper.readValue(pathJSONFile,PostPojo.class);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
return postPojo;
}
但它产生错误:
com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'src': was expecting (JSON
String, Number, Array, Object or token 'null', 'true' or 'false')
at [Source: (String)"src/main/resources/ninetyNinthPost.json"; line: 1, column: 4]
at utils.ApiUtils.readFile(ApiUtils.java:71)
at ApiApplicationRequest.getValue(ApiApplicationRequest.java:31)
我的 JSON 计算值的文件
[ {
"userId" : 10,
"id" : 99,
"title" : "temporibus sit alias delectus eligendi possimus magni",
"body" : "quo deleniti praesentium dicta non quod\naut est
molestias\nmolestias et officia quis nihil\nitaque dolorem quia"
} ]
我的java对象class
public class PostPojo {
private int userId;
private int id;
private String title;
private String body;
public PostPojo() {
}
public PostPojo(int userId, int id, String title, String body) {
this.userId = userId;
this.id = id;
this.title = title;
this.body = body;
}
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getBody() {
return body;
}
public void setBody(String body) {
this.body = body;
}
@Override
public String toString() {
return "PostModel{" +
"userId=" + userId +
", id=" + id +
", title='" + title + '\'' +
", body='" + body + '\'' +
'}';
}
}
我真的不明白什么是reason.As我明白了,在文档中阅读,它应该读取文件并将其呈现在java class中。有什么建议吗?
没有方法签名应该获取文件路径作为第一个参数。您可以传递一个 JSON 字符串作为第一个参数,或者您可以使用带有文件对象的方法签名作为第一个参数,如下所示:
public static PostPojo[] readFile(String titleFile){
String pathJSONFile = "src/main/resources/"+titleFile+".json";
ObjectMapper objectMapper = new ObjectMapper();
File jsonFile = new File(pathJSONFile);
PostPojo[] postPojo = null;
try {
postPojo = objectMapper.readValue(jsonFile, PostPojo[].class);
} catch (IOException e) {
e.printStackTrace();
}
return postPojo;
}
编辑:由于您的文件在对象周围定义了一个包装数组,因此您必须将其解析为数组。之后你可以 return 它作为一个数组,就像我在我编辑的答案中所做的那样,或者你只是 return 第一个数组记录。