Apache CXF实战之三 Map类型绑定

大湖之子 · 发表于 2017-1-7 07:27:55

　　在CXF中，如果Web Service返回类型是Map的时候，比如方法签名如下
[java] view plaincopyprint?

@WebMethod
@WebResult Map<String, User> getUserMap();

　　此时如果运行程序会得到类似下面的异常
[java] view plaincopyprint?

...
Caused by: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 2 counts of IllegalAnnotationExceptions
java.util.Map is an interface, and JAXB can't handle interfaces.
this problem is related to the following location:
at java.util.Map
at private java.util.Map com.googlecode.garbagecan.cxfstudy.type.sample2.jaxws_asm.GetUserMapResponse._return
at com.googlecode.garbagecan.cxfstudy.type.sample2.jaxws_asm.GetUserMapResponse
java.util.Map does not have a no-arg default constructor.
this problem is related to the following location:
at java.util.Map
at private java.util.Map com.googlecode.garbagecan.cxfstudy.type.sample2.jaxws_asm.GetUserMapResponse._return
at com.googlecode.garbagecan.cxfstudy.type.sample2.jaxws_asm.GetUserMapResponse
at com.sun.xml.bind.v2.runtime.IllegalAnnotationsException$Builder.check(IllegalAnnotationsException.java:102)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.java:472)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:302)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1136)
at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:154)
at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:121)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at javax.xml.bind.ContextFinder.newInstance(Unknown Source)
at javax.xml.bind.ContextFinder.newInstance(Unknown Source)
at javax.xml.bind.ContextFinder.find(Unknown Source)
at javax.xml.bind.JAXBContext.newInstance(Unknown Source)
at org.apache.cxf.jaxb.JAXBDataBinding.createContext(JAXBDataBinding.java:560)
at org.apache.cxf.jaxb.JAXBDataBinding.createJAXBContextAndSchemas(JAXBDataBinding.java:500)
at org.apache.cxf.jaxb.JAXBDataBinding.initialize(JAXBDataBinding.java:320)
... 25 more
...

　　如果把方法签名改为如下时
[java] view plaincopyprint?

@WebMethod
@WebResult HashMap<String, User> getUserMap();

　　运行程序会发现返回的结果总是一个空的HashMap。
　　对于以上问题，此时需要对Map类型做一下数据绑定或者说转换，看下面详细例子
　　1. 首先是一个实体类
[java] view plaincopyprint?

package com.googlecode.garbagecan.cxfstudy.type.sample2;
public class User {
private String id;
private String name;
private String password;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}

　　2. 对Map类型做转换的类和适配器类
[java] view plaincopyprint?

package com.googlecode.garbagecan.cxfstudy.type.sample2;
import java.util.HashMap;
import java.util.Map;
import javax.xml.bind.annotation.adapters.XmlAdapter;
public class MapAdapter extends XmlAdapter<MapConvertor, Map<String, Object>> {
@Override
public MapConvertor marshal(Map<String, Object> map) throws Exception {
MapConvertor convertor = new MapConvertor();
for (Map.Entry<String, Object> entry : map.entrySet()) {
MapConvertor.MapEntry e = new MapConvertor.MapEntry(entry);
convertor.addEntry(e);
}
return convertor;
}
@Override
public Map<String, Object> unmarshal(MapConvertor map) throws Exception {
Map<String, Object> result = new HashMap<String, Object>();
for (MapConvertor.MapEntry e : map.getEntries()) {
result.put(e.getKey(), e.getValue());
}
return result;
}
}
package com.googlecode.garbagecan.cxfstudy.type.sample2;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlType;
@XmlType(name = "MapConvertor")
@XmlAccessorType(XmlAccessType.FIELD)
public class MapConvertor {
private List<MapEntry> entries = new ArrayList<MapEntry>();
public void addEntry(MapEntry entry) {
entries.add(entry);
}
public List<MapEntry> getEntries() {
return entries;
}
public static class MapEntry {
private String key;
private Object value;
public MapEntry() {
super();
}
public MapEntry(Map.Entry<String, Object> entry) {
super();
this.key = entry.getKey();
this.value = entry.getValue();
}
public MapEntry(String key, Object value) {
super();
this.key = key;
this.value = value;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public Object getValue() {
return value;
}
public void setValue(Object value) {
this.value = value;
}
}
}

　　3. 下面是WebService接口类，注意其中的@XmlJavaTypeAdapter注解部分
[java] view plaincopyprint?

package com.googlecode.garbagecan.cxfstudy.type.sample2;
import java.util.List;
import java.util.Map;
import javax.jws.WebMethod;
import javax.jws.WebResult;
import javax.jws.WebService;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
@WebService
public interface UserService {
@WebMethod
@WebResult List<User> getUserList();
@WebMethod
@XmlJavaTypeAdapter(MapAdapter.class)
@WebResult Map<String, User> getUserMap();
}

　　4. WebService接口实现类
[java] view plaincopyprint?

package com.googlecode.garbagecan.cxfstudy.type.sample2;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
public class UserServiceImpl implements UserService {
public List<User> getUserList() {
List<User> userList = new ArrayList<User>();
for (int i = 0; i < 10; i++) {
User user = new User();
user.setId("" + i);
user.setName("user_" + i);
user.setPassword("password_" + i);
userList.add(user);
}
return userList;
}
public Map<String, User> getUserMap() {
Map<String, User> userMap = new LinkedHashMap<String, User>();
for (int i = 0; i < 10; i++) {
User user = new User();
user.setId("" + i);
user.setName("user_" + i);
user.setPassword("password_" + i);
userMap.put(user.getId(), user);
}
return userMap;
}
}

　　5. 最后是一个单元测试类
[java] view plaincopyprint?

package com.googlecode.garbagecan.cxfstudy.type.sample2;
import java.util.List;
import java.util.Map;
import javax.xml.ws.Endpoint;
import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
public class UserServiceTest {
private static final String address = "http://localhost:9000/ws/type/sample2/userService";
private UserService userService;
@BeforeClass
public static void setUpBeforeClass() throws Exception {
Endpoint.publish(address, new UserServiceImpl());
}
@Before
public void setUp() throws Exception {
JaxWsProxyFactoryBean factoryBean = new JaxWsProxyFactoryBean();
factoryBean.setAddress(address);
factoryBean.setServiceClass(UserService.class);
Object obj = factoryBean.create();
userService = (UserService)obj;
}
@After
public void tearDown() throws Exception {
userService = null;
}
@Test
public void testGetUserList() {
Assert.assertNotNull(userService);
List<User> users = userService.getUserList();
Assert.assertNotNull(users);
Assert.assertEquals(10, users.size());
}
@Test
public void testGetUserMap() {
Assert.assertNotNull(userService);
Map<String, User> users = userService.getUserMap();
Assert.assertNotNull(users);
Assert.assertEquals(10, users.size());
}
}

　　6. 运行单元测试类验证上面的实现。

账号		自动登录	找回密码
密码			立即注册

c++ size_t 和 int 的区别

HERE 使用 AWS EF 和 JFrog Artifactory 打

C++ 指针大全：从基础到进阶，一篇快速上手

wirelessnetview好用的无线分析工具

Red Hat RHCE 8 (EX294) Cert Guide

亿图图示专家(EDraw Max) V7.9 中文破解版

zabbix3.4.1安装部署+微信推送信息+大屏显

[经验分享] Apache CXF实战之三 Map类型绑定

浏览过的版块

扫码加入运维网微信交流群