jstl

hibernate 报错大全

由 怎甘沉沦 提交于 2019-12-22 12:10:41
日志 使用JDK的自定义Comparator对Cllections进行排序 oracle数据库拼音排序及NLS_SORT配置 Hibernate常见错误合集 2012-05-23 19:04:05| 分类： SSH | 标签：hibernate 一对多 |举报|字号 订阅 下载LOFTER我的照片书 | 1．错误：object references an unsaved transient instance - save the transient instance before flushing: com.xxxx.bean.java.Sysblog; nested exception is org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.xxx.bean.java.Sysblog 解决方法：没有可预期的实例，当然就要实例化对象咯 2．错误：Exceptionobject references an unsaved transient instance - save the transient instance before flushing: src

If-else (nested) or when condition in JSTL

由 老子叫甜甜 提交于 2019-12-22 12:07:25
问题 I have a program that populates a table and depending on the type of value in each cell, I change the formatting - like percentage, decimal places, grouping etc. I have a table that is the default view and I allow the user to filter those results by entering a document number and the table then changes to add 2 columns - document number and the corresponding document name. So, if the number of columns retrieved is say, 10, then some behaviour. If if it is 12, then, some other behaviour. Date

你对jstl了解多少----JSTL标签之函数（慎用）

由 南楼画角 提交于 2019-12-22 11:03:57
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 今天遇到一个很纳闷的事情，就是使用jstl的split函数。 split方法：fn:split(string, separator) 返回一个数组，以参数separator 为分割符分割参数string，分割后的每一部分就是数组的一个元素 。 实 现原理：jstl的split方法在org.apache.taglibs.standard.functions.Functions中实现。其中对 separator进行了如下处理setMaxDelimCodePoint()，该方法是求出separator中字符中ASCII码最大的字符。如 separator = ‘AB’ 则separator = ‘B’。 使用最大ASCII码最大的字符进行字符串拆分。 例如：String ss = "asdXsdsSXfghfXsdfsdf"; String[] s = split(ss, "SX"); //此处split方法为jstl的原生方法 拆出来的s的值为[asd, sds, fghf, sdfsdf]，而并非[asdXsds,fghfXsdfsdf] 按jstl的实现原理不难解释：S的ASCII码83，X的ASCII码88，于是jstl使用X来对字符ss进行拆分。 总结

How to print a java String in a jsp file [duplicate]

由 跟風遠走 提交于 2019-12-22 08:29:19
问题 This question already has answers here : How to access objects in EL expression language ${} (3 answers) Closed 4 years ago . I'm trying to print a string variable via my jsp file, here is my code: <%@ page contentType="text/html;charset=UTF-8" language="java"%> <%@ page import="java.sql.*"%> <%@ page import="java.lang.*;"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <!DOCTYPE html> <html> <head> <title>why are you not working</title> <meta charset="utf-8" /> </head>

Call javascript function with if JSTL

由 我的梦境 提交于 2019-12-22 05:41:25
问题 Is there a way to call a javascript function inside an if with JSTL? Here's the code <c:choose> <c:when test="${orderUploadAction.errors.size()==0}"> CALL JS FUNCTION HERE </c:when> <c:otherwise> CALL JS FUNCTION HERE </c:otherwise> </c:choose> 回答1: Try this <c:choose> <c:when test="${orderUploadAction.errors.size()==0}"> <script> yourFunctionName() </script> </c:when> <c:otherwise> <script> yourAnotherFunctionName() </script> </c:otherwise> </c:choose> 来源： https://stackoverflow.com/questions

Adding JSTL to jsp (Tomcat 8) [duplicate]

由 99封情书 提交于 2019-12-22 05:17:25
问题 This question already has answers here : How to install JSTL? The absolute uri: http://java.sun.com/jstl/core cannot be resolved (13 answers) Closed 3 years ago . I want to use the JSTL library in my jsp's. Now I followed a tutorial and it told me to add this line to the jsp page: <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> It gives me the error cannot resolve taglib with uri and then the URL. I'm running tomcat 8. My web.xml is like this: <web-app version="2.4" xmlns=

Populating checkboxes in JSP page with data from a JavaBean

由 天涯浪子 提交于 2019-12-22 05:11:45
问题 I have a JSP page with checkboxes inside an HTML form as below Now while editing user Skill I want to take the comma separated values from the table and populate the checkboxes in JSP. The following code brings the CSV Skills from the database table. List<UserDetails> Skills = new ArrayList<UserDetails>(); pstmt = (PreparedStatement) conn.prepareStatement(strSQL); rs = pstmt.executeQuery(); String strSkills = rs.getString("Skills"); List<String> items = Arrays.asList(strSkills.split("\\s*,\\s

有趣的Javaee

由 百般思念 提交于 2019-12-22 04:39:57
<dependency> <groupId>org.apache.geronimo.specs</groupId> <artifactId>geronimo-servlet_2.5_spec</artifactId> <version>1.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> <!-- 加上这个provided属性,代表不部署,只是开发用 --> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp.jstl</groupId> <artifactId>jstl-api</artifactId> <version>1.2</version> <!-- 排除添加依赖 --> <exclusions> <exclusion> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> </exclusion> <exclusion>

Difference between c:out and print the output using $

由 荒凉一梦 提交于 2019-12-22 04:36:26
问题 In JSTL there are two ways to print the output - <H1><c:out value="${theOutput}" /></H1> AND <H1>${theOutput}</H1> What is the difference? And which one is preferred way? Thanks. 回答1: Both methods c:out and JSP EL will display output to the page, however there is one major difference. The c:out tag will automatically escape xml output which can prevent cross site scripting. Using JSP EL (the second option) will not escape the output. When displaying data which has been inputted by a user use

converting strings to Title case in JSTL

由 こ雲淡風輕ζ 提交于 2019-12-22 03:53:01
问题 Is there any way to convert a string to Title case, using JSTL tags? Thanks in Advance. 回答1: An alternative to transforming the string on the server is to let CSS do the work: text-transform: capitalize 回答2: An idea: In a class, create a simple method that uses the WordUtils from Apache Commons Lang that will manipulate your String: import org.apache.commons.lang.WordUtils; ... public static String titleCase(String input){ return WordUtils.capitalize(input);; } And now, create your own tag
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