1.错误描写叙述 java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.util.Map at service.impl.BillServiceImpl.exportBillExcel(BillServiceImpl.java:336) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeM
org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'logging.level' to java.util.Map<java.lang.String, java.lang.String> at org.springframework.boot.context.properties.bind.Binder.handleBindError(Binder.ja
java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125) at org.springframework.test.context.suppo
问题: 在整合spring+cxf时报错java.util.Map is an interface, and JAXB can't handle interfaces. 解决方法: 将服务端的services接口返回的Map类型的值改为HashMap. 因为在做webService复杂类型值传递时,返回值的类型不要用接口类型.例如List应该改为ArrayList,Map改为HashMap等.
错误信息 org.apache.ibatis.builder.IncompleteElementException: Could not find parameter map java.util.Map at org.apache.ibatis.builder.MapperBuilderAssistant.setStatementParameterMap(MapperBuilderAssistant.java:319) at org.apache.ibatis.builder.MapperBui
java.util.Map.Entry接口主要就是在遍历map的时候用到,给你个例子:package test;import java.util.*;import java.util.Map.Entry;public class B { public static void main(String[] args) { Map<Integer,Integer> mm = new HashMap<Integer,Integer>(); for(int i=0;i<10;i++)
eclipse出现错误:he type java.util.Map$Entry cannot be resolved. It is indirectly referenced jre 换成6的就好了选中项目->右键->java build path ->找到jre system library ->选择edit->进入界面选择alternate jre ->在后面的installed jres..里选择jdk1.6的目录上的jre ->ok 之后 清除 构建下就好