jar

一、JsonArrayName

import java.lang.annotation.*;
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface JsonArrayName {
    public String name();
}
二、JsonFieldName

import java.lang.annotation.*;
/**
 * 普通字段注解
 */
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface JsonFieldName {
    public String name();
}
三、JsonObjectName

import java.lang.annotation.*;
/**
 * Object字段注解
 */
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface JsonObjectName {
    public String name();
}
四、JsonNameBinding

import com.alibaba.fastjson.JSON;
import com.xxx.annotations.JsonArrayName;
import com.xxx.annotations.JsonFieldName;
import com.xxx.annotations.JsonObjectName;
import org.apache.commons.lang3.StringUtils;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;


/**
 * 标签处理器
 * 默认对象的成员变量所处的先后顺序进行排序
 * 默认没有注解的类将按字段名命名（集合类型中的形参的字段名亦不解析）
 */
public class JsonNameBinding {

    public static String getJson(Object object) throws Exception {
        return JSON.toJSONString(JsonNameBinding.convert(object));
    }

    private static LinkedHashMap<Object, Object> convert(Object object) throws IllegalAccessException {
        LinkedHashMap<Object, Object> linkedHashMap = new LinkedHashMap<Object, Object>();
        Class objectClass = object.getClass();
        Field[] fields = objectClass.getDeclaredFields();
        for (Field field : fields) {
            JsonArrayName jsonListName = field.getAnnotation(JsonArrayName.class);
            JsonFieldName jsonFieldName = field.getAnnotation(JsonFieldName.class);
            JsonObjectName jsonObjectName = field.getAnnotation(JsonObjectName.class);
            Class type = field.getType();
            field.setAccessible(true);
            Object value = field.get(object);
            if (value != null) {
                if (jsonListName != null) {
                    List list = new ArrayList();
                    List list1 = (List) value;
                    for (Object o : list1) {
                        list.add(JsonNameBinding.convert(o));
                    }
                    linkedHashMap.put(jsonListName.name(), list);
                } else if (jsonFieldName != null) {
                    boolean f=(value!=null && !StringUtils.isBlank(value.toString()));
                    if(value!=null && !StringUtils.isBlank(value.toString())){
                        linkedHashMap.put(jsonFieldName.name(), value);
                    }

                   // if (!"".equals(String.valueOf(value))) {
                   //     linkedHashMap.put(jsonFieldName.name(), value);
                   // }
                } else if (jsonObjectName != null) {
                    linkedHashMap.put(jsonObjectName.name(), JsonNameBinding.convert(value));
                }
            }
        }
        return linkedHashMap;
    }

}
五、pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.xxx.annotation</groupId>
    <artifactId>annotation</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.47</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.3.2</version>
        </dependency>
    </dependencies>

    <build>
        <finalName>annotation</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>3.0.0</version>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id> <!-- this is used for inheritance merges -->
                        <phase>package</phase> <!-- 指定在打包节点执行jar包合并操作 -->
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>7</source>
                    <target>7</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>