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[英]how to send image through android REST Web services and save it and retrieve from mysql database
[英]unable to retrieve image from mysql through rest api using java
我的問題看似簡單,但我無法找到答案。 通過 Java 和 JDBI,我能夠從 MySQL 數據庫中檢索圖像並將其存儲在本地。 但是當我嘗試使用休息 api 時,它會在附加的屏幕截圖中給出錯誤。 我已經搜索了很多,但找不到解決方案。
堆棧跟蹤如下:
Type Exception Report
Message java.lang.IllegalStateException: No container builder available for java.sql.Blob
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
javax.servlet.ServletException: java.lang.IllegalStateException: No container builder available for java.sql.Blob
org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:489)
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause
java.lang.IllegalStateException: No container builder available for java.sql.Blob
org.skife.jdbi.v2.ContainerFactoryRegistry.createBuilderFor(ContainerFactoryRegistry.java:73)
org.skife.jdbi.v2.Query.first(Query.java:271)
org.skife.jdbi.v2.sqlobject.ResultReturnThing$SingleValueResultReturnThing.result(ResultReturnThing.java:110)
org.skife.jdbi.v2.sqlobject.ResultReturnThing.map(ResultReturnThing.java:46)
org.skife.jdbi.v2.sqlobject.QueryHandler.invoke(QueryHandler.java:43)
org.skife.jdbi.v2.sqlobject.SqlObject.invoke(SqlObject.java:212)
org.skife.jdbi.v2.sqlobject.SqlObject$3.intercept(SqlObject.java:127)
org.skife.jdbi.v2.sqlobject.CloseInternalDoNotUseThisClass$$EnhancerByCGLIB$$8d85a881.retrieveImage(<generated>)
com.sample.obs.factory.BooksFactory.retrieveImage(BooksFactory.java:188)
com.sample.obs.model.Books.listAllBooks(Books.java:378)
com.sample.obs.util.BooksRest.listAllBooks(BooksRest.java:29)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
org.glassfish.jersey.internal.Errors.process(Errors.java:315)
org.glassfish.jersey.internal.Errors.process(Errors.java:297)
org.glassfish.jersey.internal.Errors.process(Errors.java:267)
org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473)
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
在下面添加 rest api 和 listAllBooks 方法:
@GET
@Produces(MediaType.APPLICATION_JSON)
public final Books[] listAllBooks() {
Books b = new Books();
Books[] shelf = b.listAllBooks();
return shelf;
}
public final Books[] listAllBooks() {
Books[] bList = BooksFactory.listAllBooks();
for(Books b: bList) {
String path = "E:\\" + b.getBookId() + ".png";
Blob imageBlob = BooksFactory.retrieveImage(b.getBookId());
try {
byte[] image = handleBlob(imageBlob);
if (image != null) {
FileOutputStream fos = new FileOutputStream(path);
fos.write(image);
fos.close();
b.setImageUrl(path);
} else {
System.out.println("Image not available");
b.setImageUrl(null);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
int avail = BooksFactory.retrieveAvailableCopies(b.getBookId());
b.setAvailableCopies(avail);
}
return bList;
}
DAO 和 Factory 方法返回一個 Blob,我有一個用於從數據庫中獲取 Blob 的映射器。
請指導如何解決這個問題。
我終於找到了解決我的問題的方法。 我將以下代碼添加到 dbi 對象。
dbi.registerContainerFactory(new ContainerFactory<Blob>(){
@Override
public boolean accepts(Class<?> arg0) {
return false;
}
@Override
public ContainerBuilder<Blob> newContainerBuilderFor(Class<?> arg0) {
return newContainerBuilderFor(arg0);
}
});
我按照此鏈接獲取解決方案。
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