java - 使用自定义分隔符列解析 CSV 未正确映射到 POJO

Question

使用自定义列分隔符“;”解析 CSV 时并使用:

import com.fasterxml.jackson.dataformat.csv.CsvMapper;
import com.fasterxml.jackson.dataformat.csv.CsvSchema;

我收到以下错误:

com.fasterxml.jackson.databind.JsonMappingException: Can not instantiate value of type [simple type, class Author] from String value ('Email;FirstName;LastName'); no single-String constructor/factory method

这是我的解析代码:

public static <T> List<T> loadObjectList(Class<T> type, String fileName) {
     CsvSchema bootstrapSchema = CsvSchema.emptySchema();
     bootstrapSchema.withColumnSeparator(';').withoutQuoteChar();
     CsvMapper mapper = new CsvMapper();
     File file = new File(fileName);
     MappingIterator<T> readValues = 
         mapper.reader(type)
            .with(bootstrapSchema)
            .readValues(new InputStreamReader(new FileInputStream(file), "ISO-8859-1"));
     return readValues.readAll();
}

这是我想要映射到 CSV 的模型:

@JsonPropertyOrder({ "Email", "FirstName", "LastName" })
public class Author {

    String Email;
    String FirstName;
    String LastName;

    public String getEmail() {
        return Email;
    }

    public void setEmail(String Email) {
        this.Email = Email;
    }

    public String getFirstName() {
        return FirstName;
    }

    public void setFirstName(String firstName) {
        FirstName = firstName;
    }

    public String getLastName() {
        return LastName;
    }

    public void setLastName(String lastName) {
        LastName = lastName;
    }

    public Author(String email, String firstName, String lastName) {
        Email = email;
        FirstName = firstName;
        LastName = lastName;
    }

}

Answer 1

CsvSchema bootstrapSchema = CsvSchema.emptySchema();
bootstrapSchema.withColumnSeparator(';').withoutQuoteChar();

我不确定这部分 - 它不是构建器模式。

尝试

CsvSchema bootstrapSchema = CsvSchema.emptySchema().bootstrapSchema.withColumnSeparator(';').withoutQuoteChar();

相反。