在Java中解析连接在一个字符串中的所有JSON
我将许多json对象连接成一个字符串，需要解析所有这些对象。简单的例子：在Java中解析连接在一个字符串中的所有JSON,java,json,jackson,Java,Json,Jackson,我将许多json对象连接成一个字符串，需要解析所有这些对象。简单的例子： String jsonStr = "{"name":"peter","age":40}{"name":"laura","age":50}" 当使用jackson的ObjectMapper来解析这个时，它会正确地查找并读取第一个json，并删除字符串的其余部分 ObjectMapper objectMapper = new ObjectMapper(); JsonNode rootNode = objectMapper.r
String jsonStr = "{"name":"peter","age":40}{"name":"laura","age":50}"
ObjectMapperObjectMapper objectMapper = new ObjectMapper();
JsonNode rootNode = objectMapper.readTree(jsonStr);
System.out.println(rootNode);
{“name”：“peter”，“age”：20}JsonNode我在和中发现了具有相同目标的问题，其中建议使用
}{{}结尾}[]"[
{"name":"peter","age":40},
{"name":"laura","age":50}
]"
您可以将输入用括号括起来
[]}{}，{String input = "{\"name\":\"peter\",\"age\":40}{\"name\":\"laura\",\"age\":50}"
String jsonArray = "[" + input.replace("}{", "},{") + "]";
ObjectMapper mapper = new ObjectMapper();
JsonNode parsedJsonArray = mapper.readTree(jsonArray);
您必须修改JSON
String jsonStr = "[{\"name\":\"peter\",\"age\":40},{\"name\":\"laura\",\"age\":50}]";
public JsonNode convertIntoJsonNode(String jsonStr)
{
ObjectMapper objectMapper = new ObjectMapper();
JsonNode rootNode = null;
try {
rootNode = objectMapper.readTree(jsonStr);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return rootNode;
}
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
// User Model
class User{
private String name;
private Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "User [name=" + name + ", age=" + age + "]";
}
}
//Coversion Method
public List<User> convertIntoObject(String jsonStr)
{
ObjectMapper objectMapper = new ObjectMapper();
User[] myObjects = null;
try {
myObjects = objectMapper.readValue(jsonStr, User[].class);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return Arrays.asList(myObjects);
}
import java.io.IOException；
导入java.util.array；
导入java.util.List；
导入com.fasterxml.jackson.databind.JsonNode；
导入com.fasterxml.jackson.databind.ObjectMapper；
//用户模型
类用户{
私有字符串名称；
私人整数年龄；
公共字符串getName（）{
返回名称；
}
公共void集合名（字符串名）{
this.name=名称；
}
公共整数getAge（）{
回归年龄；
}
公共无效设置（整数期限）{
这个。年龄=年龄；
}
@凌驾
公共字符串toString（）{
返回“User[name=“+name+”，age=“+age+”]”；
}
}
//转换法
公共列表CONVERTINTOBJECT（字符串jsonStr）
{
ObjectMapper ObjectMapper=新的ObjectMapper（）；
用户[]myObjects=null；
试一试{
myObjects=objectMapper.readValue（jsonStr，User[].class）；
}捕获（IOE异常）{
//TODO自动生成的捕捉块
e、 printStackTrace（）；
}
返回array.asList（myObjects）；
}
public List<User> convertIntothirdway(String jsonStr)
{
ObjectMapper objectMapper = new ObjectMapper();
List<User> userList = null;
try {
userList = objectMapper.readValue(jsonStr, new TypeReference<List<User>>(){});
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return userList;
}
公共列表转换为第三种方式（字符串jsonStr）
{
ObjectMapper ObjectMapper=新的ObjectMapper（）；
List userList=null；
试一试{
userList=objectMapper.readValue（jsonStr，newtypereference（）{}）；
}捕获（IOE异常）{
//TODO自动生成的捕捉块
e、 printStackTrace（）；
}
返回用户列表；
}
List<User> userList = mapper.readValue(jsonInput, mapper.getTypeFactory().constructCollectionType(List.class, User.class));
List userList=mapper.readValue（jsonInput，mapper.getTypeFactory（）.constructioncollectiontype（List.class，User.class））；
public static void main(String[] args) throws IOException {
ObjectMapper mapper = new ObjectMapper();
JsonFactory factory = new JsonFactory(mapper);
JsonParser parser = factory.createParser(new File("config.json"));
// factory.createParser(String) and many other overload methods
// available, byte[], char[], InputStream etc.
Iterator<Person> persons = parser.readValuesAs(Person.class);
while(persons.hasNext()) {
Person p = persons.next();
System.out.printf("%s: %d%n", p.getName(), p.getAge());
}
}
peter: 40
laura: 50
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.5</version>
</dependency>
{"name":"peter","age":40}{"name":"laura","age":50}
public static void main(String[] args) throws IOException {
ObjectMapper mapper = new ObjectMapper();
JsonFactory factory = new JsonFactory(mapper);
JsonParser parser = factory.createParser(new File("config.json"));
// factory.createParser(String) and many other overload methods
// available, byte[], char[], InputStream etc.
Iterator<Person> persons = parser.readValuesAs(Person.class);
while(persons.hasNext()) {
Person p = persons.next();
System.out.printf("%s: %d%n", p.getName(), p.getAge());
}
}
peter: 40
laura: 50
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.5</version>
</dependency>
public static void main(String[] args) throws IOException {
ObjectMapper mapper = new ObjectMapper();
JsonFactory factory = new JsonFactory(mapper);
JsonParser parser = factory.createParser(new File("config.json"));
// factory.createParser(String) and many other overload methods
// available, byte[], char[], InputStream etc.
Iterator<Person> persons = parser.readValuesAs(Person.class);
while(persons.hasNext()) {
Person p = persons.next();
System.out.printf("%s: %d%n", p.getName(), p.getAge());
}
}
peter: 40
laura: 50
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.5</version>
</dependency>
com.fasterxml.jackson.core
杰克逊数据绑定
2.9.5
][[{“name”：“peter”，“age”：40}，{“name”：“劳拉”，“age”：50}]{“name”：“peter”，“age”：40}{“name”：“lau