如何告诉Jackson跳过未打开的子POJO字段，这样当我解析为CSV时，它会跳过整个列？
这是一个完整的代码示例：
-vvv 请注意，我无法以任何方式修改课程public class FooTest {
class Foo {
String something = "value";
@JsonUnwrapped(prefix = "bar.")
@JsonIgnoreProperties({ "toBeIgnored" })
Bar bar;
public String getSomething() {
return something;
}
public Bar getBar() {
return bar;
}
}
class Bar {
String toBeIgnored;
public String getToBeIgnored() {
return toBeIgnored;
}
}
@Test
public void fooTest() throws IOException {
CsvMapper mapper = new CsvMapper();
CsvSchema schema = mapper.schemaFor(Foo.class).withHeader();
ObjectWriter csvWriter = mapper.writer(schema);
OutputStream outputStream = new ByteArrayOutputStream();
SequenceWriter writer = csvWriter.writeValues(outputStream);
Foo foo = new Foo();
foo.bar = new Bar();
String toBeIgnored = "should not be parsed";
foo.bar.toBeIgnored = toBeIgnored;
writer.write(foo);
String result = outputStream.toString();
assertThat(result).doesNotContain(toBeIgnored);
assertThat(result).contains("something");
assertThat(result).doesNotContain("bar.toBeIgnored");
}
}
。
如何在课程Bar中指定我要忽略Foo？
bar.toBeIgnored有助于跳过值而不是整列。当前代码将输出具有空值的列JsonIgnoreProperties的CSV。我只是想跳过这一栏。
答案 0 :(得分：1)
使用：@JsonIgnoreProperties({ "toBeIgnoredA", "toBeIgnoredB" })
public class ToSerialize {
@JsonUnwrapped(prefix = "toBeUnwrapped")
@JsonIgnoreProperties({ "toBeIgnoredA", "toBeIgnoredB" })
public ToBeUnwrapped toBeUnwrapped;
}
或（很长的路）为ToBeUnwrapped创建包装类，您可以在其中自由配置JSON注释，而不会触及实际的ToBeUnwrapped类