增加mybatis生成分页的插件

common/pom.xml

@@ -57,9 +57,9 @@
             <version>${mybatis-spring.version}</version>
         </dependency>
         <dependency>
-            <groupId>com.github.pagehelper</groupId>
-            <artifactId>pagehelper</artifactId>
-            <version>4.1.6</version>
+            <groupId>org.mybatis.generator</groupId>
+            <artifactId>mybatis-generator-core</artifactId>
+            <version>1.3.5</version>
         </dependency>
         <!-- 缓存 -->
         <dependency>

common/src/main/java/com/zheng/common/plugin/PaginationPlugin.java

@@ -0,0 +1,99 @@
+package com.zheng.common.plugin;
+
+import org.mybatis.generator.api.IntrospectedTable;
+import org.mybatis.generator.api.PluginAdapter;
+import org.mybatis.generator.api.dom.java.*;
+import org.mybatis.generator.api.dom.xml.Attribute;
+import org.mybatis.generator.api.dom.xml.TextElement;
+import org.mybatis.generator.api.dom.xml.XmlElement;
+
+import java.util.List;
+
+/**
+ * MySQL分页插件
+ * Created by ZhangShuzheng on 2016/10/17.
+ */
+public class PaginationPlugin extends PluginAdapter {
+
+	@Override
+	public boolean validate(List<String> list) {
+		return true;
+	}
+
+	/**
+	 * 为每个Example类添加limit和offset属性已经set、get方法
+	 */
+	@Override
+	public boolean modelExampleClassGenerated(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {
+
+		PrimitiveTypeWrapper integerWrapper = FullyQualifiedJavaType.getIntInstance().getPrimitiveTypeWrapper();
+
+		Field limit = new Field();
+		limit.setName("limit");
+		limit.setVisibility(JavaVisibility.PRIVATE);
+		limit.setType(integerWrapper);
+		topLevelClass.addField(limit);
+
+		Method setLimit = new Method();
+		setLimit.setVisibility(JavaVisibility.PUBLIC);
+		setLimit.setName("setLimit");
+		setLimit.addParameter(new Parameter(integerWrapper, "limit"));
+		setLimit.addBodyLine("this.limit = limit;");
+		topLevelClass.addMethod(setLimit);
+
+		Method getLimit = new Method();
+		getLimit.setVisibility(JavaVisibility.PUBLIC);
+		getLimit.setReturnType(integerWrapper);
+		getLimit.setName("getLimit");
+		getLimit.addBodyLine("return limit;");
+		topLevelClass.addMethod(getLimit);
+
+		Field offset = new Field();
+		offset.setName("offset");
+		offset.setVisibility(JavaVisibility.PRIVATE);
+		offset.setType(integerWrapper);
+		topLevelClass.addField(offset);
+
+		Method setOffset = new Method();
+		setOffset.setVisibility(JavaVisibility.PUBLIC);
+		setOffset.setName("setOffset");
+		setOffset.addParameter(new Parameter(integerWrapper, "offset"));
+		setOffset.addBodyLine("this.offset = offset;");
+		topLevelClass.addMethod(setOffset);
+
+		Method getOffset = new Method();
+		getOffset.setVisibility(JavaVisibility.PUBLIC);
+		getOffset.setReturnType(integerWrapper);
+		getOffset.setName("getOffset");
+		getOffset.addBodyLine("return offset;");
+		topLevelClass.addMethod(getOffset);
+
+		return true;
+	}
+
+	/**
+	 * 为Mapper.xml的selectByExample添加limit
+	 */
+	@Override
+	public boolean sqlMapSelectByExampleWithoutBLOBsElementGenerated(XmlElement element,
+	                                                                 IntrospectedTable introspectedTable) {
+
+		XmlElement ifLimitNotNullElement = new XmlElement("if");
+		ifLimitNotNullElement.addAttribute(new Attribute("test", "limit != null"));
+
+		XmlElement ifOffsetNotNullElement = new XmlElement("if");
+		ifOffsetNotNullElement.addAttribute(new Attribute("test", "offset != null"));
+		ifOffsetNotNullElement.addElement(new TextElement("limit ${offset}, ${limit}"));
+		ifLimitNotNullElement.addElement(ifOffsetNotNullElement);
+
+		XmlElement ifOffsetNullElement = new XmlElement("if");
+		ifOffsetNullElement.addAttribute(new Attribute("test", "offset == null"));
+		ifOffsetNullElement.addElement(new TextElement("limit ${limit}"));
+		ifLimitNotNullElement.addElement(ifOffsetNullElement);
+
+		element.addElement(ifLimitNotNullElement);
+
+		return true;
+	}
+
+}

common/src/main/java/com/zheng/common/util/Paginator.java

@@ -0,0 +1,229 @@
+package com.zheng.common.util;
+
+
+/**
+ * 分页实体类
+ * @author shuzheng
+ * @date 2016年7月6日 下午6:05:00
+ */
+public class Paginator {
+
+	private long total = 0l;			// 总记录数
+	private int page = 1;				// 当前页数
+	private long totalPage = 1;			// 总页数
+	private int rows = 10;				// 每页记录数
+	private int step = 5;				// 最多显示分页页码数
+	private String param = "page";		// 分页参数名称，用于支持一个页面多个分页功能
+	private String url = "";			// 项目路径
+	private String query = "";			// 当前页所有参数
+	
+	public long getTotal() {
+		return total;
+	}
+
+	public void setTotal(long total) {
+		this.total = total;
+		this.initTotalPage();
+	}
+
+	public int getPage() {
+		return page;
+	}
+
+	public void setPage(int page) {
+		this.page = page;
+	}
+
+	public long getTotalPage() {
+		return totalPage;
+	}
+
+	public void setTotalPage(long totalPage) {
+		this.totalPage = totalPage;
+	}
+
+	public int getRows() {
+		return rows;
+	}
+
+	public void setRows(int rows) {
+		// 设置个最大记录数，限制单页记录过多
+		if (rows > 10000) {
+			rows = 10000;
+		}
+		this.rows = rows;
+		this.initTotalPage();
+	}
+
+	public int getStep() {
+		return step;
+	}
+
+	public void setStep(int step) {
+		this.step = step;
+	}
+
+	public String getParam() {
+		return param;
+	}
+
+	public void setParam(String param) {
+		this.param = param;
+	}
+
+	public String getUrl() {
+		return url;
+	}
+
+	public void setUrl(String url) {
+		this.url = url;
+	}
+
+	public String getQuery() {
+		return query;
+	}
+
+	public void setQuery(String query) {
+		this.query = query;
+	}
+	
+	/**
+	 * 初始化分页信息
+	 */
+	public void initTotalPage() {
+		totalPage = (total % rows) == 0 ? (total / rows) : ((total / rows) + 1);
+		if (page > totalPage) {
+			page = (int) totalPage;
+		}
+		if (page < 1) {
+			page = 1;
+		}
+	}
+
+	/**
+	 * 生成简单的分页页面内容
+	 * @return
+	 */
+	public String getHtml() {
+		// 根据request获取当前url，包括参数，如果有已存在名称未paramname的参数，剔除掉，后面会追加新的参数
+		//String contextPath = request.getContextPath();
+		//String requestURI = request.getRequestURI();
+		//String url = contextPath + requestURI;
+		//String url = request.getRequestURI();
+		//String query = request.getQueryString();
+		if (query != null) {
+			String params = "";
+			String[] querys = query.split("&");
+			for (int i = 0; i < querys.length; i++) {
+				if (querys[i].startsWith(param))
+					continue;
+				if (params.equals(""))
+					params += querys[i];
+				else
+					params += "&" + querys[i];
+			}
+			if (!params.equals(""))
+				url += "?" + params;
+		}
+		// 结果html
+		String pages = "";
+
+		int pageCount = (int) Math.ceil((double) total / rows);// 求总页数
+		if (pageCount <= 1) {
+			return pages;
+		}
+		if (page > pageCount) {
+			page = pageCount;// 如果分页变量大总页数，则将分页变量设计为总页数
+		}
+		if (page <= 0) {
+			page = 1;// 如果分页变量小于１,则将分页变量设为１
+		}
+
+		// 显示上一页
+		if (page > 1) {
+			if (url.contains("?")) {
+				pages = pages.concat("<a class=\"prev\" href=\"" + url + "&" + param + "=" + (page - 1) + "\">上一页</a>\n");
+			} else {
+				pages = pages.concat("<a class=\"prev\" href=\"" + url + "?" + param + "=" + (page - 1) + "\">上一页</a>\n");
+			}
+		} else {
+			// pages =
+			// pages.concat("<a class=\"prev\" href=\"javascript:;\" style=\"color:#ccc\">上一页</a>\n");
+		}
+		// 如果总页数大于要显示的个数，则拼接显示
+		if (pageCount > step) {
+			// 显示分页码
+			int listBegin = (page - (int) Math.floor((double) step / 2));// 从第几页开始显示分页信息
+			if (listBegin < 1) {
+				listBegin = 1;
+			}
+			// 显示第1页
+			if (listBegin >= 2) {
+				if (url.contains("?")) {
+					pages = pages.concat("<a href=\"" + url + "&" + param + "=1\">1</a> ... \n");
+				} else {
+					pages = pages.concat("<a href=\"" + url + "?" + param + "=1\">1</a> ... \n");
+				}
+			}
+			// 当前页数右侧还有未显示页码时
+			if (pageCount - page >= page - listBegin) {
+				for (int i = listBegin; i < (listBegin + step); i++) {
+					if (i != page) {
+						if (url.contains("?")) {
+							pages = pages.concat("<a href=\"" + url + "&" + param + "=" + i + "\">" + i + "</a>\n");
+						} else {
+							pages = pages.concat("<a href=\"" + url + "?" + param + "=" + i + "\">" + i + "</a>\n");
+						}
+					} else {
+						pages = pages.concat("<span class=\"current\">" + i + "</span>\n");
+					}
+				}
+				// 显示最后1页
+				if (listBegin + step <= pageCount) {
+					if (url.contains("?")) {
+						pages = pages.concat(" ... <a href=\"" + url + "&" + param + "=" + pageCount + "\">" + pageCount + "</a>\n");
+					} else {
+						pages = pages.concat(" ... <a href=\"" + url + "?" + param + "=" + pageCount + "\">" + pageCount + "</a>\n");
+					}
+				}
+			} else { // 显示最后剩余的几个页码
+				for (int i = (pageCount - step) + 1; i <= pageCount; i++) {
+					if (i != page) {
+						if (url.contains("?")) {
+							pages = pages.concat("<a href=\"" + url + "&" + param + "=" + i + "\">" + i + "</a>\n");
+						} else {
+							pages = pages.concat("<a href=\"" + url + "?" + param + "=" + i + "\">" + i + "</a>\n");
+						}
+					} else {
+						pages = pages.concat("<span class=\"current\">" + i + "</span>\n");
+					}
+				}
+			}
+		} else { // 总页数小于等于step时，直接显示
+			for (int i = 1; i <= pageCount; i++) {
+				if (i != page) {
+					if (url.contains("?")) {
+						pages = pages.concat("<a href=\"" + url + "&" + param + "=" + i + "\">" + i + "</a>\n");
+					} else {
+						pages = pages.concat("<a href=\"" + url + "?" + param + "=" + i + "\">" + i + "</a>\n");
+					}
+				} else {
+					pages = pages.concat("<span class=\"current\">" + i + "</span>\n");
+				}
+			}
+		}
+		// 显示下一页
+		if (page < pageCount) {
+			if (url.contains("?")) {
+				pages = pages.concat("<a class=\"next\" href=\"" + url + "&" + param + "=" + (page + 1) + "\">下一页</a>\n");
+			} else {
+				pages = pages.concat("<a class=\"next\" href=\"" + url + "?" + param + "=" + (page + 1) + "\">下一页</a>\n");
+			}
+		} else {
+			// pages =
+			// pages.concat("<a class=\"next\" href=\"javascript:;\" style=\"color:#ccc\">下一页</a>\n");
+		}
+		return pages;
+	}
+
+}