首先謝謝樓主，讓我們這些初學(xué)者受益非淺！我認(rèn)真看過本集的錄像，也按樓主的操作無誤，可是在UserDAOImp類中的方法處總是出錯(cuò)：
package com.test;
import java.util.List;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import com.test.hibernate.User;
public class UserDAOImp extends HibernateDaoSupport implements UserDAO {

private static String hql = "from User u where u.username=? and password=?";
public boolean isValidUser(String username, String password) {

String[] userlist=new String[2];
userlist[0]=username;
userlist[1]=password;
List userList = this.getHibernateTemplate().find(hql,userlist);

if (userList.size() > 0) {
return true;
}
return false;
}
}
最后運(yùn)行導(dǎo)致以下錯(cuò)誤：
javax.servlet.ServletException: Hibernate operation: could not execute query; uncategorized SQLException for SQL [select user0_.ID as ID, user0_.USERNAME as USERNAME0_, user0_.PASSWORD as PASSWORD0_ from user user0_ where USERNAME=?]; SQL state [HY000]; error code [1266]; Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='; nested exception is java.sql.SQLException: Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:523)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root cause

org.springframework.jdbc.UncategorizedSQLException: Hibernate operation: could not execute query; uncategorized SQLException for SQL [select user0_.ID as ID, user0_.USERNAME as USERNAME0_, user0_.PASSWORD as PASSWORD0_ from user user0_ where USERNAME=?]; SQL state [HY000]; error code [1266]; Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='; nested exception is java.sql.SQLException: Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='
org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.translate(SQLStateSQLExceptionTranslator.java:96)
org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.translate(SQLErrorCodeSQLExceptionTranslator.java:257)
org.springframework.orm.hibernate3.HibernateAccessor.convertJdbcAccessException(HibernateAccessor.java:424)
org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:411)
org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:363)
org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:800)
org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:796)
com.test.UserDAOImp.isValidUser(UserDAOImp.java:27)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:324)
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:292)
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:155)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:122)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:174)
$Proxy1.isValidUser(Unknown Source)
com.test.struts.action.LoginAction.execute(LoginAction.java:58)
org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:106)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

請樓主或各位同仁幫忙解決哦！此問題讓我郁悶了一整天了哦！
我屏蔽這個(gè)isValidUser函數(shù)之后，就沒有這個(gè)問題了哦！而且我在此基礎(chǔ)上配置了續(xù)集，均成功！！！新增、刪除、瀏覽都正確哦！

先謝了哦！