Java调用web服务问题-javax.servlet.servletException：Java.lang.NullPointerException

Question

当我调用服务时，我会得到一个错误。我尝试了所有我能找到的解决办法

错误全文：

@GET
@Path("/getAnalyzedMatches")
@Produces(MediaType.APPLICATION_XML)
public static AnalyzeResponseModel getAnalyzedMatches() throws ClassNotFoundException, SQLException {
    AnalyzeResponseModel response = new AnalyzeResponseModel();
    List<AnalyseResultModel> analyzedMatches = SoveMatchesUtil.getAnalyzedMatches();
    /* try to set object */
    List<Object> objectList = new ArrayList<>();
    for (AnalyseResultModel item : analyzedMatches) {
        objectList.add(item);
    }
    response.setList(objectList);
    return response;
}

package com.sove.model;

import java.util.List;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "list")
public class AnalyzeResponseModel {
    List<Object> list;

    public AnalyzeResponseModel() {
    }

    public List<Object> getList() {
        return list;
    }

    @XmlAttribute
    public void setList(List<Object> list) {
        this.list = list;
    }

}

<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>sove</groupId>
<artifactId>sove</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.5.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <version>3.0.0</version>
            <configuration>
                <warSourceDirectory>WebContent</warSourceDirectory>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>

    <dependency>
        <groupId>javax.ws.rs</groupId>
        <artifactId>javax.ws.rs-api</artifactId>
        <version>2.0.1</version>
    </dependency>
    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>jaxrs-api</artifactId>
        <version>3.0.12.Final</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish.jersey.bundles</groupId>
        <artifactId>jaxrs-ri</artifactId>
        <version>2.17</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.lucee/postgresql -->
    <dependency>
        <groupId>org.lucee</groupId>
        <artifactId>postgresql</artifactId>
        <version>8.3-606.jdbc4</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/log4j/log4j -->
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>

</dependencies>

<?xml version = "1.0" encoding = "UTF-8"?> 
<web-app xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"  
   xmlns = "http://java.sun.com/xml/ns/javaee"  
   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee  
   http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"  
   id = "WebApp_ID" version = "3.0"> 
   <display-name>sove</display-name> 
   <servlet> 
      <servlet-name>Jersey RESTful Application</servlet-name> 
      <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class> 
      <init-param> 
         <param-name>jersey.config.server.provider.packages</param-name> 
         <param-value>com.sove.service</param-value> 
      </init-param> 
   </servlet> 
   <servlet-mapping> 
      <servlet-name>Jersey RESTful Application</servlet-name> 
      <url-pattern>/*</url-pattern> 
   </servlet-mapping>   
</web-app>

Answer 1

通过在响应模型（AnalyseResultModel）中将公共属性变为私有属性来解决该问题。