前言
本博文主要是记录我阅读过的SSH项目所学习到的知识，并不是相关系列教程。该SSH项目的gitHub地址：ERP项目地址
删除数据
实际业务中真正意义上的数据删除操作比较少见，多数情况是在数据中设置标记，通过标记的值来区分该数据是否可以用，而不是将数据真正的删除。
根据业务需求，为数据添加标记位，同时对数据的维护中添加启用/停用切换按钮，用于替换删除业务。所有的查询操作默认携带条件值为标记为可以的数据。除特殊业务外，标记为不可用的数据将不参与日常数据操作。
javaScript数值数据操作
javascript中如果需要对页面组件获取的值进行数字加操作，必须保障两个操作数据都是数字，否则将进行字符串连接运算。此处使用*1操作，将字符串快速转换为数字格式
代码生成器
由于我们的Dao、Service、Controller、配置文件都有很多重复的地方，我们可以通过“代码生成器”来将我们的文件生成出来。
- 主要是依靠反射和IO的技术来进行生成对应的文件
- 我个人认为它不够通用、如果使用SSM来进行开发的话，那这段代码的用处就不大了，并且还要遵循它固有的习惯开发。
- 主要是看看原来还能有这种操作！
package cn.itcast.erp.util.generator; import java.io.BufferedWriter; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.InputStream; import java.lang.reflect.Field; import java.lang.reflect.Modifier; import cn.itcast.erp.invoice.operdetail.vo.OperDetailModel; public class GeneratorUtil { private Class clazz; private String b ; //Emp private String l ; //e private String s ; //emp private String pkg ; //cn.itcast.erp.auth.emp private String dir ; //cn/itcast/erp/auth/emp/vo public static void main(String[] args) throws Exception { //EmpModel,RoleModel,ResModel,MenuModel //SupplierModel,GoodsTypeModel,GoodsModel //OrderModel,OrderDetailModel //StoreModel,StoreDetailModel,OperDetailModel new GeneratorUtil(OperDetailModel.class); System.out.println("struts.xml未进行映射"); System.out.println("HbmXml未添加关联关系"); System.out.println("QueryModel未添加自定义范围查询条件"); System.out.println("DaoImpl中未对自定义查询条件形式条件设置"); } public GeneratorUtil(Class clazz) throws Exception{ this.clazz = clazz; //生成所有的内容 //-1.数据初始化 dataInit(); //0.创建目录 generatorDirectory(); //1.QueryModel generatorQueryModel(); //2.Hbm.xml generatorHbmXml(); //3.Dao generatorDao(); //4.Impl generatorImpl(); //5.Ebi generatorEbi(); //6.Ebo generatorEbo(); //7.Action generatorAction(); //8.applicationContext.xml generatorApplicationContextXml(); //9.struts.xml(选作) //modifyStrutsXml(); } private void modifyStrutsXml() throws Exception { //1.读取原始的内容 //2.读取到特定位置（package）添加指定内容 //我们要读的文件与写的文件是同一个文件 /* RandomAccessFile类读写文件时 读取，一共100，读70，写，写的内容会覆盖后30 111 222 333 444 在333的后面写5 111 222 333 544 在333的后面写5 111 222 333 555 */ //方案一： /* 读取原始文件，将内容写入新文件 写之前判断，读取的内容是否是特定内容，特定内容写之前，加入新的内容 写完毕之后生成了新的文件，删除老的文件，使用新文件更名为老的文件 */ //方案二： //1.读取原始文件的文件大小,字节总数1000 File f = new File("resources/struts.xml"); long len = f.length(); //2.创建一个字节数组，大小等于原始文件字节总数 byte[] buf = new byte[(int)len]; //3.将原始文件读入该byte数组 InputStream is = new FileInputStream(f); is.read(buf); is.close(); //4.将buf转化为字符串 String all = new String(buf); //5.查找固定位置 int idx = all.lastIndexOf(" </package>"); //6.将要写入的内容插入该位置 String info = " <!-- "+b+" -->\r\n <action name=\""+s+"_*\" class=\""+s+"Action\" method=\"{1}\">\r\n </action>\r\n\r\n"; //7.将info加入all的指定位置 StringBuilder sbf = new StringBuilder(all); sbf.insert(idx, info); //8.将sbf中的组合最终内容写入struts.xml FileOutputStream fos = new FileOutputStream(f); fos.write(sbf.toString().getBytes()); fos.close(); } //8.applicationContext.xml private void generatorApplicationContextXml() throws Exception { File f = new File("resources/applicationContext-"+s+".xml"); if(f.exists()){ return; } f.createNewFile(); BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); bw.newLine(); bw.write("<beans xmlns=\"http://www.springframework.org/schema/beans\""); bw.newLine(); bw.write(" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\""); bw.newLine(); bw.write(" xsi:schemaLocation=\""); bw.newLine(); bw.write(" http://www.springframework.org/schema/beans "); bw.newLine(); bw.write(" http://www.springframework.org/schema/beans/spring-beans.xsd"); bw.newLine(); bw.write(" \"> "); bw.newLine(); bw.write(" <!-- Action -->"); bw.newLine(); bw.write(" <bean id=\""+s+"Action\" class=\""+pkg+".web."+b+"Action\" scope=\"prototype\">"); bw.newLine(); bw.write(" <property name=\""+s+"Ebi\" ref=\""+s+"Ebi\"/>"); bw.newLine(); bw.write(" </bean>"); bw.newLine(); bw.write(" <!-- Ebi -->"); bw.newLine(); bw.write(" <bean id=\""+s+"Ebi\" class=\""+pkg+".business.ebo."+b+"Ebo\">"); bw.newLine(); bw.write(" <property name=\""+s+"Dao\" ref=\""+s+"Dao\"/>"); bw.newLine(); bw.write(" </bean>"); bw.newLine(); bw.write(" <!-- Dao -->"); bw.newLine(); bw.write(" <bean id=\""+s+"Dao\" class=\""+pkg+".dao.impl."+b+"Impl\">"); bw.newLine(); bw.write(" <property name=\"sessionFactory\" ref=\"sessionFactory\"/>"); bw.newLine(); bw.write(" </bean>"); bw.newLine(); bw.write("</beans>"); bw.newLine(); bw.flush(); bw.close(); } //7.Action private void generatorAction() throws Exception { File f = new File("src/"+dir+"/web/"+b+"Action.java"); if(f.exists()){ return; } f.createNewFile(); BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("package "+pkg+".web;"); bw.newLine(); bw.newLine(); bw.write("import java.util.List;"); bw.newLine(); bw.newLine(); bw.write("import "+pkg+".business.ebi."+b+"Ebi;"); bw.newLine(); bw.write("import "+pkg+".vo."+b+"Model;"); bw.newLine(); bw.write("import "+pkg+".vo."+b+"QueryModel;"); bw.newLine(); bw.write("import cn.itcast.erp.util.base.BaseAction;"); bw.newLine(); bw.newLine(); bw.write("public class "+b+"Action extends BaseAction{"); bw.newLine(); bw.write(" public "+b+"Model "+l+"m = new "+b+"Model();"); bw.newLine(); bw.write(" public "+b+"QueryModel "+l+"qm = new "+b+"QueryModel();"); bw.newLine(); bw.newLine(); bw.write(" private "+b+"Ebi "+s+"Ebi;"); bw.newLine(); bw.write(" public void set"+b+"Ebi("+b+"Ebi "+s+"Ebi) {"); bw.newLine(); bw.write(" this."+s+"Ebi = "+s+"Ebi;"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" //列表"); bw.newLine(); bw.write(" public String list(){"); bw.newLine(); bw.write(" setDataTotal("+s+"Ebi.getCount("+l+"qm));"); bw.newLine(); bw.write(" List<"+b+"Model> "+s+"List = "+s+"Ebi.getAll("+l+"qm,pageNum,pageCount);"); bw.newLine(); bw.write(" put(\""+s+"List\", "+s+"List);"); bw.newLine(); bw.write(" return LIST;"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" //到添加"); bw.newLine(); bw.write(" public String input(){"); bw.newLine(); bw.write(" if("+l+"m.getUuid()!=null){"); bw.newLine(); bw.write(" "+l+"m = "+s+"Ebi.get("+l+"m.getUuid());"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.write(" return INPUT;"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" //添加"); bw.newLine(); bw.write(" public String save(){"); bw.newLine(); bw.write(" if("+l+"m.getUuid() == null){"); bw.newLine(); bw.write(" "+s+"Ebi.save("+l+"m);"); bw.newLine(); bw.write(" }else{"); bw.newLine(); bw.write(" "+s+"Ebi.update("+l+"m);"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.write(" return TO_LIST;"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" //删除"); bw.newLine(); bw.write(" public String delete(){"); bw.newLine(); bw.write(" "+s+"Ebi.delete("+l+"m);"); bw.newLine(); bw.write(" return TO_LIST;"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write("}"); bw.newLine(); bw.flush(); bw.close(); } //6.Ebo private void generatorEbo() throws Exception { File f = new File("src/"+dir+"/business/ebo/"+b+"Ebo.java"); if(f.exists()){ return; } f.createNewFile(); BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("package "+pkg+".business.ebo;"); bw.newLine(); bw.newLine(); bw.write("import java.io.Serializable;"); bw.newLine(); bw.write("import java.util.List;"); bw.newLine(); bw.newLine(); bw.write("import "+pkg+".business.ebi."+b+"Ebi;"); bw.newLine(); bw.write("import "+pkg+".dao.dao."+b+"Dao;"); bw.newLine(); bw.write("import "+pkg+".vo."+b+"Model;"); bw.newLine(); bw.write("import cn.itcast.erp.util.base.BaseQueryModel;"); bw.newLine(); bw.newLine(); bw.write("public class "+b+"Ebo implements "+b+"Ebi{"); bw.newLine(); bw.write(" private "+b+"Dao "+s+"Dao;"); bw.newLine(); bw.write(" public void set"+b+"Dao("+b+"Dao "+s+"Dao) {"); bw.newLine(); bw.write(" this."+s+"Dao = "+s+"Dao;"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" public void save("+b+"Model "+l+"m) {"); bw.newLine(); bw.write(" "+s+"Dao.save("+l+"m);"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" public void update("+b+"Model "+l+"m) {"); bw.newLine(); bw.write(" "+s+"Dao.update("+l+"m);"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" public void delete("+b+"Model "+l+"m) {"); bw.newLine(); bw.write(" "+s+"Dao.delete("+l+"m);"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" public "+b+"Model get(Serializable uuid) {"); bw.newLine(); bw.write(" return "+s+"Dao.get(uuid);"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" public List<"+b+"Model> getAll() {"); bw.newLine(); bw.write(" return "+s+"Dao.getAll();"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" public List<"+b+"Model> getAll(BaseQueryModel qm, Integer pageNum,Integer pageCount) {"); bw.newLine(); bw.write(" return "+s+"Dao.getAll(qm,pageNum,pageCount);"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write(" public Integer getCount(BaseQueryModel qm) {"); bw.newLine(); bw.write(" return "+s+"Dao.getCount(qm);"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write("}"); bw.newLine(); bw.flush(); bw.close(); } //5.Ebi private void generatorEbi() throws Exception { File f = new File("src/"+dir+"/business/ebi/"+b+"Ebi.java"); if(f.exists()){ return; } f.createNewFile(); BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("package "+pkg+".business.ebi;"); bw.newLine(); bw.newLine(); bw.write("import org.springframework.transaction.annotation.Transactional;"); bw.newLine(); bw.newLine(); bw.write("import "+pkg+".vo."+b+"Model;"); bw.newLine(); bw.write("import cn.itcast.erp.util.base.BaseEbi;"); bw.newLine(); bw.newLine(); bw.write("@Transactional"); bw.newLine(); bw.write("public interface "+b+"Ebi extends BaseEbi<"+b+"Model>{"); bw.newLine(); bw.newLine(); bw.write("}"); bw.newLine(); bw.flush(); bw.close(); } //4.Impl private void generatorImpl() throws Exception { File f = new File("src/"+dir+"/dao/impl/"+b+"Impl.java"); if(f.exists()){ return; } f.createNewFile(); BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("package "+pkg+".dao.impl;"); bw.newLine(); bw.newLine(); bw.write("import org.hibernate.criterion.DetachedCriteria;"); bw.newLine(); bw.write("import org.hibernate.criterion.Restrictions;"); bw.newLine(); bw.newLine(); bw.write("import "+pkg+".dao.dao."+b+"Dao;"); bw.newLine(); bw.write("import "+pkg+".vo."+b+"Model;"); bw.newLine(); bw.write("import "+pkg+".vo."+b+"QueryModel;"); bw.newLine(); bw.write("import cn.itcast.erp.util.base.BaseImpl;"); bw.newLine(); bw.write("import cn.itcast.erp.util.base.BaseQueryModel;"); bw.newLine(); bw.newLine(); bw.write("public class "+b+"Impl extends BaseImpl<"+b+"Model> implements "+b+"Dao{"); bw.newLine(); bw.newLine(); bw.write(" public void doQbc(DetachedCriteria dc,BaseQueryModel qm){"); bw.newLine(); bw.write(" "+b+"QueryModel "+l+"qm = ("+b+"QueryModel)qm;"); bw.newLine(); bw.write(" // TODO 添加自定义查询条件"); bw.newLine(); bw.write(" }"); bw.newLine(); bw.newLine(); bw.write("}"); bw.newLine(); bw.flush(); bw.close(); } //3.Dao private void generatorDao() throws Exception { File f = new File("src/"+dir+"/dao/dao/"+b+"Dao.java"); if(f.exists()){ return; } f.createNewFile(); BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("package "+pkg+".dao.dao;"); bw.newLine(); bw.newLine(); bw.write("import "+pkg+".vo."+b+"Model;"); bw.newLine(); bw.write("import cn.itcast.erp.util.base.BaseDao;"); bw.newLine(); bw.newLine(); bw.write("public interface "+b+"Dao extends BaseDao<"+b+"Model> {"); bw.newLine(); bw.newLine(); bw.write("}"); bw.newLine(); bw.flush(); bw.close(); } //2.Hbm.xml private void generatorHbmXml() throws Exception { //1.创建文件 File f = new File("src/"+dir+"/vo/"+b+"Model.hbm.xml"); if(f.exists()){ return; } f.createNewFile(); //2.IO写入内容 BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); bw.newLine(); bw.write("<!DOCTYPE hibernate-mapping PUBLIC"); bw.newLine(); bw.write(" '-//Hibernate/Hibernate Mapping DTD 3.0//EN'"); bw.newLine(); bw.write(" 'http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd'>"); bw.newLine(); bw.write("<hibernate-mapping>"); bw.newLine(); bw.write(" <class name=\""+pkg+".vo."+b+"Model\" table=\"tbl_"+s+"\">"); bw.newLine(); bw.write(" <id name=\"uuid\">"); bw.newLine(); bw.write(" <generator class=\"native\" />"); bw.newLine(); bw.write(" </id>"); bw.newLine(); //hibernate的映射配置文件中要对原始模型类中的属性进行配置，反射获取所有字段 Field[] fds = clazz.getDeclaredFields(); for(Field fd:fds) { //如果字段的修饰符是private，生成 if(fd.getModifiers() == Modifier.PRIVATE && !fd.getName().equals("uuid")){ //如果是关联关系不生成,不是关联关系(Long,Integer,Double,String) if( fd.getType().equals(String.class)|| fd.getType().equals(Long.class)|| fd.getType().equals(Integer.class)|| fd.getType().equals(Double.class) ){ if(!fd.getName().endsWith("View")){ bw.write(" <property name=\""+fd.getName()+"\"/>"); bw.newLine(); } } } } bw.write(" </class>"); bw.newLine(); bw.write("</hibernate-mapping>"); bw.newLine(); bw.flush(); bw.close(); } //1.QueryModel private void generatorQueryModel() throws Exception { //1.创建文件 File f = new File("src/"+dir+"/vo/"+b+"QueryModel.java"); //判断：如果该文件存在，终止操作 if(f.exists()){ return; } f.createNewFile(); //2.IO写入内容 BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("package "+pkg+".vo;"); bw.newLine(); bw.newLine(); bw.write("import cn.itcast.erp.util.base.BaseQueryModel;"); bw.newLine(); bw.newLine(); bw.write("public class "+b+"QueryModel extends "+b+"Model implements BaseQueryModel{"); bw.newLine(); bw.write(" // TODO 添加自定义查询条件"); bw.newLine(); bw.write("}"); bw.newLine(); bw.flush(); bw.close(); } //0.创建目录 private void generatorDirectory() { //business/ebi // src+//cn.itcast.erp.auth.emp+business/ebi .vo File f = new File("src/"+dir+"/business/ebi"); f.mkdirs(); //business/ebo f = new File("src/"+dir+"/business/ebo"); f.mkdirs(); //dao/dao f = new File("src/"+dir+"/dao/dao"); f.mkdirs(); //dao/impl f = new File("src/"+dir+"/dao/impl"); f.mkdirs(); //web f = new File("src/"+dir+"/web"); f.mkdirs(); } //-1.数据初始化 private void dataInit() { String className = clazz.getSimpleName(); //EmpModel b = className.substring(0, className.length()-5); //Emp String first = b.substring(0,1); //E l = first.toLowerCase(); //e s = l+b.substring(1); //emp String rootPkg = clazz.getPackage().getName(); //cn.itcast.erp.auth.emp.vo pkg = rootPkg.substring(0,rootPkg.length()-3); //cn.itcast.erp.auth.emp dir = pkg.replace(".","/"); //cn/itcast/erp/auth/emp/vo } /* public static void main(String[] args) throws Exception { //核心工作原理：文件IO+反射 File f = new File("src/EmpAction.java"); f.createNewFile(); BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("public class EmpAction{}"); bw.flush(); bw.close(); } */ }
