在Java中,你可以使用Jackson库实现Java对象和Map类的转换。
1.获取Jackson
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.6.3</version>
</dependency>
2.实现转换
1)实体类
package com.inspur.neo4j.domain;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.inspur.neo4j.util.Neo4JCustomIdStrategy;
import org.neo4j.ogm.annotation.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* 图谱节点:动态增加属性
*/
@NodeEntity
public class GraphNode {
@Id
@GeneratedValue(strategy = Neo4JCustomIdStrategy.class)
private String id;
private String label;
private String labelName;
private String typeUri;
private Double x;
private Double y;
private boolean active;
@Properties
private Map<String, Object> icon = new HashMap<>();
@Properties
private Map<String, Object> properties = new HashMap<>();
@JsonIgnoreProperties({"startNode", "endNode"})
@Relationship(type = "EDGE")
private List<Edge> edges = new ArrayList<>();
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getLabel() {
return label;
}
public void setLabel(String label) {
this.label = label;
}
public String getLabelName() {
return labelName;
}
public void setLabelName(String labelName) {
this.labelName = labelName;
}
public String getTypeUri() {
return typeUri;
}
public void setTypeUri(String typeUri) {
this.typeUri = typeUri;
}
public Double getX() {
return x;
}
public void setX(Double x) {
this.x = x;
}
public Double getY() {
return y;
}
public void setY(Double y) {
this.y = y;
}
public boolean isActive() {
return active;
}
public void setActive(boolean active) {
this.active = active;
}
public Map<String, Object> getIcon() {
return icon;
}
public void setIcon(Map<String, Object> icon) {
this.icon = icon;
}
public Map<String, Object> getProperties() {
return properties;
}
public void setProperties(Map<String, Object> properties) {
this.properties = properties;
}
public List<Edge> getEdges() {
return edges;
}
public void setEdges(List<Edge> edges) {
this.edges = edges;
}
}
2)转换过程
ObjectMapper m = new ObjectMapper();
Map<String, Object> node = m.convertValue(graphNode, Map.class);
References
- Java – Convert Object to Map example;
- How to convert a Java object (bean) to key-value pairs (and vice versa)?;
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