“线程中的异常”；“主要”；com.sun.jersey.api.client.clienthandler异常：java.net.ConnectException:连接被拒绝：连接
我使用neo4j 2.2.4 我尝试了这个程序，这是我的测试代码“线程中的异常”；“主要”；com.sun.jersey.api.client.clienthandler异常：java.net.ConnectException:连接被拒绝：连接,java,neo4j,Java,Neo4j,我使用neo4j 2.2.4 我尝试了这个程序，这是我的测试代码 package neo4j.rest.client; import javax.ws.rs.core.MediaType; import org.json.JSONObject; import com.sun.jersey.api.client.Client; import com.sun.jersey.api.client.ClientResponse; import com.sun.jersey.api.client.WebR
package neo4j.rest.client;
import javax.ws.rs.core.MediaType;
import org.json.JSONObject;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
public class MyRestClient {
public static void main(String[] args) {
MyRestClient jersey = new MyRestClient();
jersey.createNode();
jersey.sendCypher();
}
public void createNode(){
//Create a REST Client
Client client = Client.create();
//Define a resource (REST Endpoint) which needs to be Invoked
//for creating a Node
WebResource resource = client.resource("http://localhost:7474").path("/db/data/node");
//Define properties for the node.
JSONObject node = new JSONObject();
node.append("Name", "John");
System.out.println(node.toString());
//Invoke the rest endpoint as JSON request
ClientResponse res = resource.accept(MediaType.APPLICATION_JSON)
.entity(node.toString())
.post(ClientResponse.class);
//Print the URI of the new Node
System.out.println("URI of New Node = " + res.getLocation());
}
public void sendCypher() {
//Create a REST Client
Client client = Client.create();
//Define a resource (REST Endpoint) which needs to be Invoked
//for executing Cypher Query
WebResource resource = client.resource("http://localhost:7474").path("/db/data/cypher");
//Define JSON Object and Cypher Query
JSONObject cypher = new JSONObject();
cypher.accumulate("query", "match n return n limit 10");
//Invoke the rest endpoint as JSON request
ClientResponse res = resource.accept(MediaType.APPLICATION_JSON).entity(cypher.toString())
.post(ClientResponse.class);
//Print the response received from the Server
System.out.println(res.getEntity(String.class));
}
}
- 检查Neo4j服务器是否已启动并正在运行。只需在浏览器中打开即可
- 如果您使用Neo4j的默认设置，您的代码将正常工作。因为默认情况下启用了授权。您有两个选择：
- 将授权标头添加到您的请求中
addFilter（新的HTTPBasicAuthFilter（“neo4j”，“您的_密码”））
- 禁用授权
# Disable authorization
dbms.security.auth_enabled=false
您确定您的服务器正在运行并且可以访问吗？