jakarta-ee

问题 I am new in JAVA EE. My question is, why do we need jackson databind? Because We can receive the Request Params by @ModelAttribute and requests through http PUT or POST by @RequestBody . I can't find a reason why we need jackson databind to convert json/xml to POJO or vice versa. Thanks. 回答1: Why do we need jackson databind? Because representing structured data is much easier using XML (or JSON) than using simple name-value pairs. Because it is more convenient to send and receive JSON from

问题 I am using Eclipse Juno v4.2 R2, an eclipse-internal GlassFish 3.1.2 (had the same problem with 3.1.2.2 before) and Apache CXF 2.7.1, trying to implement RESTful web services via JAX-RS. While the GlassFish server was starting up and deployment of the application was successful, the application cannot be deployed anymore since I restarted the IDE. When Eclipse tried to publish the application on GlassFish, I keep getting this error: Severe: wsdl file classpath:/org/apache/cxf/ws/discovery

问题 I am using Eclipse Juno v4.2 R2, an eclipse-internal GlassFish 3.1.2 (had the same problem with 3.1.2.2 before) and Apache CXF 2.7.1, trying to implement RESTful web services via JAX-RS. While the GlassFish server was starting up and deployment of the application was successful, the application cannot be deployed anymore since I restarted the IDE. When Eclipse tried to publish the application on GlassFish, I keep getting this error: Severe: wsdl file classpath:/org/apache/cxf/ws/discovery

问题 I am using Eclipse Juno v4.2 R2, an eclipse-internal GlassFish 3.1.2 (had the same problem with 3.1.2.2 before) and Apache CXF 2.7.1, trying to implement RESTful web services via JAX-RS. While the GlassFish server was starting up and deployment of the application was successful, the application cannot be deployed anymore since I restarted the IDE. When Eclipse tried to publish the application on GlassFish, I keep getting this error: Severe: wsdl file classpath:/org/apache/cxf/ws/discovery

问题 Iam forced to apply this question because everything else documented is not working. Goal: To log SQL statements as they are executed in the DB along with their bounded variables. Environment: Payara 5.182, Hibernate 5.3.2, SLF4j with Logback. It seems that the official approach is NOT to touch the persistence.xml to enable hibernate logging but to properly configure the logging framework. pom.xml <!-- Logging --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic<

问题 Iam forced to apply this question because everything else documented is not working. Goal: To log SQL statements as they are executed in the DB along with their bounded variables. Environment: Payara 5.182, Hibernate 5.3.2, SLF4j with Logback. It seems that the official approach is NOT to touch the persistence.xml to enable hibernate logging but to properly configure the logging framework. pom.xml <!-- Logging --> <dependency> <groupId>ch.qos.logback</groupId> <artifactId>logback-classic<

问题 I am developing an application using Struts 2 and Hibernate. On a JSP page I have one form in which all CRUD operations I am performing. I want my Form data to be persisted, which is temporarily entered in the form fields. One approach which I tried is to bind all the data into an Object and store that object in a session or cache but I know there is some limitation of storing data like this. My form is having the functionality to add n number of rows which means I have to store large amount

问题 I am developing an application using Struts 2 and Hibernate. On a JSP page I have one form in which all CRUD operations I am performing. I want my Form data to be persisted, which is temporarily entered in the form fields. One approach which I tried is to bind all the data into an Object and store that object in a session or cache but I know there is some limitation of storing data like this. My form is having the functionality to add n number of rows which means I have to store large amount

问题 What is the difference between these two Automatic value generation strategies? 1. @GeneratedValue 2. @GeneratedValue(strategy=IDENTITY) 回答1: This is like following: AUTO Indicates that the persistence provider should pick an appropriate strategy for the particular database. IDENTITY Indicates that the persistence provider must assign primary keys for the entity using database identity column. SEQUENCE Indicates that the persistence provider must assign primary keys for the entity using

问题 What is the difference between these two Automatic value generation strategies? 1. @GeneratedValue 2. @GeneratedValue(strategy=IDENTITY) 回答1: This is like following: AUTO Indicates that the persistence provider should pick an appropriate strategy for the particular database. IDENTITY Indicates that the persistence provider must assign primary keys for the entity using database identity column. SEQUENCE Indicates that the persistence provider must assign primary keys for the entity using