基于ssm框架的分页插件

描述：需要配置自己数据库，数据方言，拦截mybatis 中标签中的id名datalistPage，默认为<select id="datalistPage" parameterType="page" resultType="pd">，需要在mybatis-config中配置插件就是第5的一条。

1、Page基础类

package com.easyeon.entity;

import com.easyeon.util.Const;
import com.easyeon.util.PageData;
import com.easyeon.util.Tools;

/**
* 分页类
* @author FH QQ 313596790[青苔]
* 创建时间：2014年6月28日
*/
public class Page {

private int showCount; //每页显示记录数
private int totalPage; //总页数
private int totalResult; //总记录数
private int currentPage; //当前页
private int currentResult; //当前记录起始索引
private boolean entityOrField; //true:需要分页的地方，传入的参数就是Page实体；false:需要分页的地方，传入的参数所代表的实体拥有Page属性
private String pageStr; //最终页面显示的底部翻页导航，详细见：getPageStr();
private PageData pd = new PageData();

public Page(){
try {
this.showCount = Integer.parseInt(Tools.readTxtFile(Const.PAGE));
} catch (Exception e) {
this.showCount = 15;
}
}

public int getTotalPage() {
if(totalResult%showCount==0)
totalPage = totalResult/showCount;
else
totalPage = totalResult/showCount+1;
return totalPage;
}

public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}

public int getTotalResult() {
return totalResult;
}

public void setTotalResult(int totalResult) {
this.totalResult = totalResult;
}

public int getCurrentPage() {
if(currentPage<=0)
currentPage = 1;
if(currentPage>getTotalPage())
currentPage = getTotalPage();
return currentPage;
}

public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}

//拼接分页页面及JS函数
public String getPageStr() {
StringBuffer sb = new StringBuffer();
if(totalResult>0){
sb.append(" <ul class=\"pagination pull-right no-margin\">\n");
if(currentPage==1){
sb.append(" <li><a>共<font color=red>"+totalResult+"</font>条</a></li>\n");
sb.append(" <li><input type=\"number\" value=\"\" id=\"toGoPage\" style=\"width:55px;text-align:center;float:left\" placeholder=\"页码\"/></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"toTZ();\" class=\"btn btn-mini btn-success\">跳转</a></li>\n");
sb.append(" <li><a>首页</a></li>\n");
sb.append(" <li><a>上页</a></li>\n");
}else{
sb.append(" <li><a>共<font color=red>"+totalResult+"</font>条</a></li>\n");
sb.append(" <li><input type=\"number\" value=\"\" id=\"toGoPage\" style=\"width:55px;text-align:center;float:left\" placeholder=\"页码\"/></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"toTZ();\" class=\"btn btn-mini btn-success\">跳转</a></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage(1)\">首页</a></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage("+(currentPage-1)+")\">上页</a></li>\n");
}
int showTag = 5;//分页标签显示数量
int startTag = 1;
if(currentPage>showTag){
startTag = currentPage-1;
}
int endTag = startTag+showTag-1;
for(int i=startTag; i<=totalPage && i<=endTag; i++){
if(currentPage==i)
sb.append("<li class=\"active\"><a><font color='white'>"+i+"</font></a></li>\n");
else
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage("+i+")\">"+i+"</a></li>\n");
}
if(currentPage==totalPage){
sb.append(" <li><a>下页</a></li>\n");
sb.append(" <li><a>尾页</a></li>\n");
}else{
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage("+(currentPage+1)+")\">下页</a></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage("+totalPage+")\">尾页</a></li>\n");
}
sb.append(" <li><a>共"+totalPage+"页</a></li>\n");
sb.append(" <li><select title='显示条数' style=\"width:55px;float:left;margin-top:1px;\" onchange=\"changeCount(this.value)\">\n");
sb.append(" <option value='"+showCount+"'>"+showCount+"</option>\n");
sb.append(" <option value='10'>10</option>\n");
sb.append(" <option value='20'>20</option>\n");
sb.append(" <option value='30'>30</option>\n");
sb.append(" <option value='40'>40</option>\n");
sb.append(" <option value='50'>50</option>\n");
sb.append(" <option value='60'>60</option>\n");
sb.append(" <option value='70'>70</option>\n");
sb.append(" <option value='80'>80</option>\n");
sb.append(" <option value='90'>90</option>\n");
sb.append(" <option value='99'>99</option>\n");
sb.append(" </select>\n");
sb.append(" </li>\n");

sb.append("</ul>\n");
sb.append("<script type=\"text/javascript\">\n");

//2018-02-06

sb.append("document.getElementById(\"toGoPage\").addEventListener(\"input\",function(event){");
sb.append("event.target.value = event.target.value.replace(/\\-/g,\"\");");
sb.append("});");
//换页函数
sb.append("function nextPage(page){");
//sb.append(" top.jzts();");
sb.append(" if(true && document.forms[0]){\n");
sb.append(" var url = document.forms[0].getAttribute(\"action\");\n");
sb.append(" if(url.indexOf('?')>-1){url += \"&"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" else{url += \"?"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" url = url + page + \"&" +(entityOrField?"showCount":"page.showCount")+"="+showCount+"\";\n");
sb.append(" document.forms[0].action = url;\n");
sb.append(" document.forms[0].submit();\n");
sb.append(" }else{\n");
sb.append(" var url = document.location+'';\n");
sb.append(" if(url.indexOf('?')>-1){\n");
sb.append(" if(url.indexOf('currentPage')>-1){\n");
sb.append(" var reg = /currentPage=\\d*/g;\n");
sb.append(" url = url.replace(reg,'currentPage=');\n");
sb.append(" }else{\n");
sb.append(" url += \"&"+(entityOrField?"currentPage":"page.currentPage")+"=\";\n");
sb.append(" }\n");
sb.append(" }else{url += \"?"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" url = url + page + \"&" +(entityOrField?"showCount":"page.showCount")+"="+showCount+"\";\n");
sb.append(" document.location = url;\n");
sb.append(" }\n");
sb.append("}\n");

//调整每页显示条数
sb.append("function changeCount(value){");
sb.append(" top.jzts();");
sb.append(" if(true && document.forms[0]){\n");
sb.append(" var url = document.forms[0].getAttribute(\"action\");\n");
sb.append(" if(url.indexOf('?')>-1){url += \"&"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" else{url += \"?"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" url = url + \"1&" +(entityOrField?"showCount":"page.showCount")+"=\"+value;\n");
sb.append(" document.forms[0].action = url;\n");
sb.append(" document.forms[0].submit();\n");
sb.append(" }else{\n");
sb.append(" var url = document.location+'';\n");
sb.append(" if(url.indexOf('?')>-1){\n");
sb.append(" if(url.indexOf('currentPage')>-1){\n");
sb.append(" var reg = /currentPage=\\d*/g;\n");
sb.append(" url = url.replace(reg,'currentPage=');\n");
sb.append(" }else{\n");
sb.append(" url += \"1&"+(entityOrField?"currentPage":"page.currentPage")+"=\";\n");
sb.append(" }\n");
sb.append(" }else{url += \"?"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" url = url + \"&" +(entityOrField?"showCount":"page.showCount")+"=\"+value;\n");
sb.append(" document.location = url;\n");
sb.append(" }\n");
sb.append("}\n");

//跳转函数
sb.append("function toTZ(){");
sb.append("var toPaggeVlue = document.getElementById(\"toGoPage\").value;");
sb.append("if(toPaggeVlue == ''){document.getElementById(\"toGoPage\").value=1;return;}");
sb.append("if(isNaN(Number(toPaggeVlue))){document.getElementById(\"toGoPage\").value=1;return;}");
sb.append("nextPage(toPaggeVlue);");
sb.append("}\n");
sb.append("</script>\n");
}
pageStr = sb.toString();
return pageStr;
}

public void setPageStr(String pageStr) {
this.pageStr = pageStr;
}

public int getShowCount() {
return showCount;
}

public void setShowCount(int showCount) {

this.showCount = showCount;
}

public int getCurrentResult() {
currentResult = (getCurrentPage()-1)*getShowCount();
if(currentResult<0)
currentResult = 0;
return currentResult;
}

public void setCurrentResult(int currentResult) {
this.currentResult = currentResult;
}

public boolean isEntityOrField() {
return entityOrField;
}

public void setEntityOrField(boolean entityOrField) {
this.entityOrField = entityOrField;
}

public PageData getPd() {
return pd;
}

public void setPd(PageData pd) {
this.pd = pd;
}

}

2、工具类

package com.easyeon.util;

import java.lang.reflect.Field;

/**
* 说明：反射工具
* 创建人：easyeon
* 修改时间：2014年9月20日
* @version
*/
public class ReflectHelper {
/**
* 获取obj对象fieldName的Field
* @param obj
* @param fieldName
* @return
*/
public static Field getFieldByFieldName(Object obj, String fieldName) {
for (Class<?> superClass = obj.getClass(); superClass != Object.class; superClass = superClass
.getSuperclass()) {
try {
return superClass.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
}
}
return null;
}

/**
* 获取obj对象fieldName的属性值
* @param obj
* @param fieldName
* @return
* @throws SecurityException
* @throws NoSuchFieldException
* @throws IllegalArgumentException
* @throws IllegalAccessException
*/
public static Object getValueByFieldName(Object obj, String fieldName)
throws SecurityException, NoSuchFieldException,
IllegalArgumentException, IllegalAccessException {
Field field = getFieldByFieldName(obj, fieldName);
Object value = null;
if(field!=null){
if (field.isAccessible()) {
value = field.get(obj);
} else {
field.setAccessible(true);
value = field.get(obj);
field.setAccessible(false);
}
}
return value;
}

/**
* 设置obj对象fieldName的属性值
* @param obj
* @param fieldName
* @param value
* @throws SecurityException
* @throws NoSuchFieldException
* @throws IllegalArgumentException
* @throws IllegalAccessException
*/
public static void setValueByFieldName(Object obj, String fieldName,
Object value) throws SecurityException, NoSuchFieldException,
IllegalArgumentException, IllegalAccessException {
Field field = obj.getClass().getDeclaredField(fieldName);
if (field.isAccessible()) {
field.set(obj, value);
} else {
field.setAccessible(true);
field.set(obj, value);
field.setAccessible(false);
}
}

}

3、tool工具类

package com.easyeon.util;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
* 说明：常用工具
* 创建人：easyeon
* 修改时间：2015年11月24日
* @version
*/
public class Tools {

/**
* 随机生成六位数验证码
* @return
*/
public static int getRandomNum(){
Random r = new Random();
return r.nextInt(900000)+100000;//(Math.random()*(999999-100000)+100000)
}

/**
* 检测字符串是否不为空(null,"","null")
* @param s
* @return 不为空则返回true，否则返回false
*/
public static boolean notEmpty(String s){
return s!=null && !"".equals(s) && !"null".equals(s);
}

/**
* 检测字符串是否为空(null,"","null")
* @param s
* @return 为空则返回true，不否则返回false
*/
public static boolean isEmpty(String s){
return s==null || "".equals(s) || "null".equals(s);
}

/**
* 字符串转换为字符串数组
* @param str 字符串
* @param splitRegex 分隔符
* @return
*/
public static String[] str2StrArray(String str,String splitRegex){
if(isEmpty(str)){
return null;
}
return str.split(splitRegex);
}

/**
* 用默认的分隔符(,)将字符串转换为字符串数组
* @param str 字符串
* @return
*/
public static String[] str2StrArray(String str){
return str2StrArray(str,",\\s*");
}

/**
* 按照yyyy-MM-dd HH:mm:ss的格式，日期转字符串
* @param date
* @return yyyy-MM-dd HH:mm:ss
*/
public static String date2Str(Date date){
return date2Str(date,"yyyy-MM-dd HH:mm:ss");
}

/**
* 按照yyyy-MM-dd HH:mm:ss的格式，字符串转日期
* @param date
* @return
*/
public static Date str2Date(String date){
if(notEmpty(date)){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
return sdf.parse(date);
} catch (ParseException e) {
e.printStackTrace();
}
return new Date();
}else{
return null;
}
}

/**
* 按照参数format的格式，日期转字符串
* @param date
* @param format
* @return
*/
public static String date2Str(Date date,String format){
if(date!=null){
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(date);
}else{
return "";
}
}

/**
* 把时间根据时、分、秒转换为时间段
* @param StrDate
*/
public static String getTimes(String StrDate){
String resultTimes = "";

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
java.util.Date now;

try {
now = new Date();
java.util.Date date=df.parse(StrDate);
long times = now.getTime()-date.getTime();
long day = times/(24*60*60*1000);
long hour = (times/(60*60*1000)-day*24);
long min = ((times/(60*1000))-day*24*60-hour*60);
long sec = (times/1000-day*24*60*60-hour*60*60-min*60);

StringBuffer sb = new StringBuffer();
//sb.append("发表于：");
if(hour>0 ){
sb.append(hour+"小时前");
} else if(min>0){
sb.append(min+"分钟前");
} else{
sb.append(sec+"秒前");
}

resultTimes = sb.toString();
} catch (ParseException e) {
e.printStackTrace();
}

return resultTimes;
}

/**
* 写txt里的单行内容
* @param filePath 文件路径
* @param content 写入的内容
*/
public static void writeFile(String fileP,String content){
String filePath = String.valueOf(Thread.currentThread().getContextClassLoader().getResource(""))+"../../"; //项目路径
filePath = (filePath.trim() + fileP.trim()).substring(6).trim();
if(filePath.indexOf(":") != 1){
filePath = File.separator + filePath;
}
try {
OutputStreamWriter write = new OutputStreamWriter(new FileOutputStream(filePath),"utf-8");
BufferedWriter writer=new BufferedWriter(write);
writer.write(content);
writer.close();


} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 验证邮箱
* @param email
* @return
*/
public static boolean checkEmail(String email){
boolean flag = false;
try{
String check = "^([a-z0-9A-Z]+[-|_|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
Pattern regex = Pattern.compile(check);
Matcher matcher = regex.matcher(email);
flag = matcher.matches();
}catch(Exception e){
flag = false;
}
return flag;
}
/**
* 验证折扣率：小于等于1大于0的两位小数
* @param email
* @return
*/
public static boolean checkRRate(String rrate){
boolean flag = false;
try{
String check = "^(?:0\\.\\d{0,2}|[01](?:\\.0{1,2})?)$";
Pattern regex = Pattern.compile(check);
Matcher matcher = regex.matcher(rrate);
flag = matcher.matches();
}catch(Exception e){
flag = false;
}
return flag;
}

/**
* 验证手机号码
* @param mobiles
* @return
*/
public static boolean checkMobileNumber(String mobileNumber){
boolean flag = false;
try{
Pattern regex = Pattern.compile("^(((13[0-9])|(15([0-3]|[5-9]))|(18[0,5-9]))\\d{8})|(0\\d{2}-\\d{8})|(0\\d{3}-\\d{7})$");
Matcher matcher = regex.matcher(mobileNumber);
flag = matcher.matches();
}catch(Exception e){
flag = false;
}
return flag;
}

/**
* 检测KEY是否正确
* @param paraname 传入参数
* @param FKEY 接收的 KEY
* @return 为空则返回true，不否则返回false
*/
public static boolean checkKey(String paraname, String FKEY){
paraname = (null == paraname)? "":paraname;
return MD5.md5(paraname+DateUtil.getDays()+",fh,").equals(FKEY);
}

/**
* 读取txt里的单行内容
* @param filePath 文件路径
*/
public static String readTxtFile(String fileP) {
try {

String filePath = String.valueOf(Thread.currentThread().getContextClassLoader().getResource(""))+"../../"; //项目路径
filePath = filePath.replaceAll("file:/", "");
filePath = filePath.replaceAll("%20", " ");
filePath = filePath.trim() + fileP.trim();
if(filePath.indexOf(":") != 1){
filePath = File.separator + filePath;
}
String encoding = "utf-8";
File file = new File(filePath);
if (file.isFile() && file.exists()) { // 判断文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file), encoding); // 考虑到编码格式
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while ((lineTxt = bufferedReader.readLine()) != null) {
return lineTxt;
}
read.close();
}else{
System.out.println("找不到指定的文件,查看此路径是否正确:"+filePath);
}
} catch (Exception e) {
System.out.println("读取文件内容出错");
}
return "";
}

//add by daiyz 2017-09-20判断日期是不是标准日期格式
public static boolean isValidDate(String str) {
boolean convertSuccess=true;
if(str.length()!=10){
convertSuccess=false;
}
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
try {
format.setLenient(false);
format.parse(str);
} catch (ParseException e) {
convertSuccess=false;
}
return convertSuccess;
}

public static boolean is18ByteIdCard(String idCard){
Pattern pattern1 = Pattern.compile("^(\\d{6})(19|20)(\\d{2})(1[0-2]|0[1-9])(0[1-9]|[1-2][0-9]|3[0-1])(\\d{3})(\\d|X|x)?$");
Matcher matcher = pattern1.matcher(idCard);
if(matcher.matches()){
return true;
}
return false;
}
//判断日期是否为 yyyy-MM-dd HH:mm:ss
public static boolean isValidDate1(String str) {
boolean convertSuccess=true;
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
format.setLenient(false);
format.parse(str);
} catch (ParseException e) {
convertSuccess=false;
}
return convertSuccess;
}

public static void main(String[] args) throws ParseException {
System.out.println(isValidDate1("2007-02-28 00:00:0"));
}

}

4、分页插件类

package com.easyeon.plugin;

import java.lang.reflect.Field;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.Properties;

import javax.xml.bind.PropertyException;

import org.apache.ibatis.executor.ErrorContext;
import org.apache.ibatis.executor.ExecutorException;
import org.apache.ibatis.executor.statement.BaseStatementHandler;
import org.apache.ibatis.executor.statement.RoutingStatementHandler;
import org.apache.ibatis.executor.statement.StatementHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.mapping.ParameterMode;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Plugin;
import org.apache.ibatis.plugin.Signature;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.property.PropertyTokenizer;
import org.apache.ibatis.scripting.xmltags.ForEachSqlNode;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.type.TypeHandler;
import org.apache.ibatis.type.TypeHandlerRegistry;

import com.easyeon.entity.Page;
import com.easyeon.util.ReflectHelper;
import com.easyeon.util.Tools;
/**
*
* 类名称：分页插件
* 类描述：
* @author FH
* 作者单位：
* 联系方式：qq313596790
* 修改时间：2016年2月1日
* @version 1.0
*/
@Intercepts({@Signature(type=StatementHandler.class,method="prepare",args={Connection.class})})
public class PagePlugin implements Interceptor {

private static String dialect = ""; //数据库方言
private static String pageSqlId = ""; //mapper.xml中需要拦截的ID(正则匹配)

public Object intercept(Invocation ivk) throws Throwable {
// TODO Auto-generated method stub
if(ivk.getTarget() instanceof RoutingStatementHandler){
RoutingStatementHandler statementHandler = (RoutingStatementHandler)ivk.getTarget();
BaseStatementHandler delegate = (BaseStatementHandler) ReflectHelper.getValueByFieldName(statementHandler, "delegate");
MappedStatement mappedStatement = (MappedStatement) ReflectHelper.getValueByFieldName(delegate, "mappedStatement");

if(mappedStatement.getId().matches(pageSqlId)){ //拦截需要分页的SQL
BoundSql boundSql = delegate.getBoundSql();
Object parameterObject = boundSql.getParameterObject();//分页SQL<select>中parameterType属性对应的实体参数，即Mapper接口中执行分页方法的参数,该参数不得为空
if(parameterObject==null){
throw new NullPointerException("parameterObject尚未实例化！");
}else{
Connection connection = (Connection) ivk.getArgs()[0];
String sql = boundSql.getSql();
//String countSql = "select count(0) from (" + sql+ ") as tmp_count"; //记录统计
String fhsql = sql;
String countSql = "select count(0) from (" + fhsql+ ") tmp_count"; //记录统计 == oracle 加 as 报错(SQL command not properly ended)
PreparedStatement countStmt = connection.prepareStatement(countSql);
BoundSql countBS = new BoundSql(mappedStatement.getConfiguration(),countSql,boundSql.getParameterMappings(),parameterObject);
setParameters(countStmt,mappedStatement,countBS,parameterObject);
ResultSet rs = countStmt.executeQuery();
int count = 0;
if (rs.next()) {
count = rs.getInt(1);
}
rs.close();
countStmt.close();
//System.out.println(count);
Page page = null;
if(parameterObject instanceof Page){ //参数就是Page实体
page = (Page) parameterObject;
page.setEntityOrField(true);
page.setTotalResult(count);
}else{ //参数为某个实体，该实体拥有Page属性
Field pageField = ReflectHelper.getFieldByFieldName(parameterObject,"page");
if(pageField!=null){
page = (Page) ReflectHelper.getValueByFieldName(parameterObject,"page");
if(page==null)
page = new Page();
page.setEntityOrField(false);
page.setTotalResult(count);
ReflectHelper.setValueByFieldName(parameterObject,"page", page); //通过反射，对实体对象设置分页对象
}else{
throw new NoSuchFieldException(parameterObject.getClass().getName()+"不存在 page 属性！");
}
}
String pageSql = generatePageSql(sql,page);
ReflectHelper.setValueByFieldName(boundSql, "sql", pageSql); //将分页sql语句反射回BoundSql.
}
}
}
return ivk.proceed();
}

/**
* 对SQL参数(?)设值,参考org.apache.ibatis.executor.parameter.DefaultParameterHandler
* @param ps
* @param mappedStatement
* @param boundSql
* @param parameterObject
* @throws SQLException
*/
private void setParameters(PreparedStatement ps,MappedStatement mappedStatement,BoundSql boundSql,Object parameterObject) throws SQLException {
ErrorContext.instance().activity("setting parameters").object(mappedStatement.getParameterMap().getId());
List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
if (parameterMappings != null) {
Configuration configuration = mappedStatement.getConfiguration();
TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
MetaObject metaObject = parameterObject == null ? null: configuration.newMetaObject(parameterObject);
for (int i = 0; i < parameterMappings.size(); i++) {
ParameterMapping parameterMapping = parameterMappings.get(i);
if (parameterMapping.getMode() != ParameterMode.OUT) {
Object value;
String propertyName = parameterMapping.getProperty();
PropertyTokenizer prop = new PropertyTokenizer(propertyName);
if (parameterObject == null) {
value = null;
} else if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
value = parameterObject;
} else if (boundSql.hasAdditionalParameter(propertyName)) {
value = boundSql.getAdditionalParameter(propertyName);
} else if (propertyName.startsWith(ForEachSqlNode.ITEM_PREFIX)&& boundSql.hasAdditionalParameter(prop.getName())) {
value = boundSql.getAdditionalParameter(prop.getName());
if (value != null) {
value = configuration.newMetaObject(value).getValue(propertyName.substring(prop.getName().length()));
}
} else {
value = metaObject == null ? null : metaObject.getValue(propertyName);
}
TypeHandler typeHandler = parameterMapping.getTypeHandler();
if (typeHandler == null) {
throw new ExecutorException("There was no TypeHandler found for parameter "+ propertyName + " of statement "+ mappedStatement.getId());
}
typeHandler.setParameter(ps, i + 1, value, parameterMapping.getJdbcType());
}
}
}
}

/**
* 根据数据库方言，生成特定的分页sql
* @param sql
* @param page
* @return
*/
private String generatePageSql(String sql,Page page){
if(page!=null && Tools.notEmpty(dialect)){
StringBuffer pageSql = new StringBuffer();
if("mysql".equals(dialect)){
pageSql.append(sql);
pageSql.append(" limit "+page.getCurrentResult()+","+page.getShowCount());
}
return pageSql.toString();
}else{
return sql;
}
}

public Object plugin(Object arg0) {
// TODO Auto-generated method stub
return Plugin.wrap(arg0, this);
}

public void setProperties(Properties p) {
dialect = p.getProperty("dialect");
if (Tools.isEmpty(dialect)) {
try {
throw new PropertyException("dialect property is not found!");
} catch (PropertyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
pageSqlId = p.getProperty("pageSqlId");
if (Tools.isEmpty(pageSqlId)) {
try {
throw new PropertyException("pageSqlId property is not found!");
} catch (PropertyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

}

5、mybatis 配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD SQL Map Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

<settings>
<setting name="cacheEnabled" value="true" />
<setting name="useGeneratedKeys" value="true" />
<setting name="defaultExecutorType" value="REUSE" />
</settings>

<typeAliases>

<typeAlias type="com.easyeon.util.PageData" alias="pd"/>

<typeAlias type="com.easyeon.entity.Page" alias="Page"/>
</typeAliases>

<plugins>
<plugin interceptor="com.easyeon.plugin.PagePlugin">
<property name="dialect" value="mysql"/>
<property name="pageSqlId" value=".*listPage.*"/>
</plugin>
</plugins>

</configuration>

基于ssm框架的分页插件

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