Web|WebService开发 - CXF(4) - 服务端返回Map类型数据 CXF|服务

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前言 【Web|WebService开发 - CXF(4) - 服务端返回Map类型数据】之前说完了JavaBean的传递今天来说一下Map类型的传递
Map类型传递其实主要的还是针对的服务端的类型转换所以主要修改的代码时在服务端的我们还是按照正常的思路在扩充方法来看一下会出现什么错误吧
还是在我们的接口中新增一个方法返回一个Map类型的结构
代码如下

/* 获取所有用户角色 */ Map,List> getAllUserRole();

然后在实现类实现对应的方法

@Override public Map, List> getAllUserRole() { // 声明Map存储用户角色信息 Map,List> myMap = new HashMap<>(); // 创建第一个用户角色列表 List list1 = new ArrayList<>(); list1.add(new Role(1,"root")); list1.add(new Role(1,"guest")); myMap.put("lwx",list1); // 创建第二个用户角色列表 List list2 = new ArrayList<>(); list1.add(new Role(1,"guest")); myMap.put("jack",list2); return myMap; }

然后呢我们还是开心的去发布我们的服务端代码
会发现报如下错误

Exception in thread "main" org.apache.cxf.service.factory.ServiceConstructionException at org.apache.cxf.jaxb.JAXBDataBinding.initialize(JAXBDataBinding.java:354) at org.apache.cxf.service.factory.AbstractServiceFactoryBean.initializeDataBindings(AbstractServiceFactoryBean.java:86) at org.apache.cxf.wsdl.service.factory.ReflectionServiceFactoryBean.buildServiceFromClass(ReflectionServiceFactoryBean.java:469) at org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.buildServiceFromClass(JaxWsServiceFactoryBean.java:693) at org.apache.cxf.wsdl.service.factory.ReflectionServiceFactoryBean.initializeServiceModel(ReflectionServiceFactoryBean.java:529) at org.apache.cxf.wsdl.service.factory.ReflectionServiceFactoryBean.create(ReflectionServiceFactoryBean.java:262) at org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.create(JaxWsServiceFactoryBean.java:199) at org.apache.cxf.frontend.AbstractWSDLBasedEndpointFactory.createEndpoint(AbstractWSDLBasedEndpointFactory.java:103) at org.apache.cxf.frontend.ServerFactoryBean.create(ServerFactoryBean.java:168) at org.apache.cxf.jaxws.JaxWsServerFactoryBean.create(JaxWsServerFactoryBean.java:211) at top.liwenxiang.server.main.main.main(main.java:20) Caused by: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions java.util.List是接口, 而 JAXB 无法处理接口。 this problem is related to the following location: at java.util.List at private java.util.Map top.liwenxiang.server.service.jaxws_asm.GetAllUserRoleResponse._return at top.liwenxiang.server.service.jaxws_asm.GetAllUserRoleResponse at com.sun.xml.bind.v2.runtime.IllegalAnnotationsException$Builder.check(IllegalAnnotationsException.java:76) at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.java:441) at com.sun.xml.bind.v2.runtime.JAXBContextImpl.(JAXBContextImpl.java:273) at com.sun.xml.bind.v2.runtime.JAXBContextImpl.(JAXBContextImpl.java:109) at com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1126) at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:135) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:247) at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:234) at javax.xml.bind.ContextFinder.find(ContextFinder.java:441) at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:641) at org.apache.cxf.common.jaxb.JAXBContextCache$2.run(JAXBContextCache.java:345) at org.apache.cxf.common.jaxb.JAXBContextCache$2.run(JAXBContextCache.java:343) at java.security.AccessController.doPrivileged(Native Method) at org.apache.cxf.common.jaxb.JAXBContextCache.createContext(JAXBContextCache.java:343) at org.apache.cxf.common.jaxb.JAXBContextCache.getCachedContextAndSchemas(JAXBContextCache.java:245) at org.apache.cxf.jaxb.JAXBDataBinding.createJAXBContextAndSchemas(JAXBDataBinding.java:497) at org.apache.cxf.jaxb.JAXBDataBinding.initialize(JAXBDataBinding.java:352) ... 10 more

这个错误就是不能够识别我们接口对应方法的返回类型而抛出的错误信息我们需要解决并且让cxf能够识别这个类型所以我们需要进行一个适配的操作
首先我们在我们对应返回map的方法上面加上一个注解 @XmlJavaTypeAdapter(MyMapAdapter.class)
MyMapAdapter 这个类使我们一会自己需要新建的

/* 获取所有用户角色 */ @XmlJavaTypeAdapter(MyMapAdapter.class) Map,List> getAllUserRole();

新建MyMapAdapter类并继承XmlAdapter类实现其中的方法并编写对应代码进行转换
XmlAdapter 第一个是转换的类第二个是绑定的参数类型
实现两个方法进行相互转换一个是从 Map 转换到 MyRole 一个是从MyRole转换到Map
我们的MyRole是需要进行创建的借助这么一个中间实体类进行值得设置

MyRole 代码

package top.liwenxiang.server.entity; import java.util.List; public class MyRole {private String key; private List value; public String getKey() { return key; }public void setKey(String key) { this.key = key; }public List getValue() { return value; }public void setValue(List value) { this.value = https://www.it610.com/article/value; } }

MyMapAdapter 代码

package top.liwenxiang.server.adapter; import top.liwenxiang.server.entity.MyRole; import top.liwenxiang.server.entity.Role; import javax.xml.bind.ValidationEventHandler; import javax.xml.bind.annotation.adapters.XmlAdapter; import java.util.HashMap; import java.util.List; import java.util.Map; public class MyMapAdapter extends XmlAdapter>> {/** * Convert a value type to a bound type. * * @param v The value to be converted. Can be null. * @throws Exception if there's an error during the conversion. The caller is responsible for *reporting the error to the user through {@link ValidationEventHandler}. *//* 这里通过遍历得到Map并返回 */ @Override public Map, List> unmarshal(MyRole[] v) throws Exception { Map, List> map = new HashMap<>(); for (int i = 0 ; i < v.length ; i++){ map.put(v[i].getKey(),v[i].getValue()); } return map; }/** * Convert a bound type to a value type. * * @param v The value to be convereted. Can be null. * @throws Exception if there's an error during the conversion. The caller is responsible for *reporting the error to the user through {@link ValidationEventHandler}. */ /* 通过遍历得到MyRole数组并返回 */ @Override public MyRole[] marshal(Map, List> v) throws Exception { MyRole[] roles = new MyRole[v.size()]; int i = 0; for(String key : v.keySet()){ MyRole m = new MyRole(); roles[i] = m; roles[i].setKey(key); roles[i].setValue(v.get(key)); i++; } return roles; } }

编写完毕之后呢再次去发布咱们的服务端服务就成功了
接下来还是去生成咱们的客户端代码和之前一样
执行对应命令

Web|WebService开发 - CXF(4) - 服务端返回Map类型数据

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生成完毕之后编写客户端代码对应的类都会生成出来

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客户端代码
通过getItem方法就可以得到一个List集合返回我们的MyRole实体在里面遍历可以获取到对应的用户名称和角色

package client; import top.liwenxiang.server.service.*; import java.io.UnsupportedEncodingException; import java.util.List; public class invoke { public static void main(String[] args) throws UnsupportedEncodingException, UnsupportedEncodingException_Exception { HelloWebServiceService helloWebServiceService = new HelloWebServiceService(); HelloWebService helloWebServicePort = helloWebServiceService.getHelloWebServicePort(); MyRoleArray allUserRole = helloWebServicePort.getAllUserRole(); List item = allUserRole.getItem(); System.out.println(item); } }

输出结果