package com.binzhou.util; import java.io.*; import java.sql.*; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; /** * 自动生成MyBatis的实体类、实体映射XML文件、Mapper * * @author lifeifei * @create 2018-06-19 16:23 **/ @SuppressWarnings("hiding") public class EntityUtil { /** * *********************************使用前必读******************* * * * * 使用前请将moduleName更改为自己模块的名称即可（一般情况下与数据库名一致），其他无须改动。 * * * ********************************************************** */ private final String type_char = "char"; private final String type_date = "date"; private final String type_timestamp = "timestamp"; private final String type_datetime = "datetime"; private final String type_int = "int"; private final String type_bigint = "bigint"; private final String type_text = "text"; private final String type_bit = "bit"; private final String type_decimal = "decimal"; private final String type_blob = "blob"; private final String moduleName = "zhy"; // 对应模块名称（根据自己模块做相应调整!!!务必修改^_^） private final String bean_path = "d:/code/entity_bean"; private final String mapper_path = "d:/code/entity_mapper"; private final String xml_path = "d:/code/entity_mapper/xml"; private final String bean_package = "com.binzhou." + moduleName + ".entity"; private final String mapper_package = "com.binzhou." + moduleName + ".mapper"; private final String driverName = "com.mysql.jdbc.Driver"; private final String dbName = "zhydb"; private final String user = "root"; private final String password = "root"; private final String url = "jdbc:mysql://127.0.0.1:3306/" + dbName + "?characterEncoding=utf8"; private String tableName = null; private String beanName = null; private String mapperName = null; private Connection conn = null; private void init() throws ClassNotFoundException, SQLException { Class.forName(driverName); conn = DriverManager.getConnection(url, user, password); } /** * 获取所有的表 * * @return * @throws SQLException */ private List<String> getTables() throws SQLException { List<String> tables = new ArrayList<String>(); PreparedStatement pstate = conn.prepareStatement("show tables"); ResultSet results = pstate.executeQuery(); while (results.next()) { String tableName = results.getString(1); // if ( tableName.toLowerCase().startsWith("yy_") ) { tables.add(tableName); // } } return tables; } private void processTable(String table) { StringBuffer sb = new StringBuffer(table.length()); String tableNew = table.toLowerCase(); String[] tables = tableNew.split("_"); String temp = null; for (int i = 1; i < tables.length; i++) { temp = tables[i].trim(); sb.append(temp.substring(0, 1).toUpperCase()).append(temp.substring(1)); } beanName = sb.toString(); mapperName = beanName + "Mapper"; } private String processType(String type) { if (type.indexOf(type_char) > -1) { return "String"; } else if (type.indexOf(type_bigint) > -1) { return "Long"; } else if (type.indexOf(type_int) > -1) { return "Integer"; } else if (type.indexOf(type_date) > -1) { return "java.util.Date"; } else if (type.indexOf(type_text) > -1) { return "String"; } else if (type.indexOf(type_timestamp) > -1) { return "java.util.Date"; } else if (type.indexOf(type_datetime) > -1) { return "java.util.Date"; } else if (type.indexOf(type_bit) > -1) { return "Boolean"; } else if (type.indexOf(type_decimal) > -1) { return "java.math.BigDecimal"; } else if (type.indexOf(type_blob) > -1) { return "byte[]"; } return null; } private String processField(String field) { StringBuffer sb = new StringBuffer(field.length()); //field = field.toLowerCase(); String[] fields = field.split("_"); String temp = null; sb.append(fields[0]); for (int i = 1; i < fields.length; i++) { temp = fields[i].trim(); sb.append(temp.substring(0, 1).toUpperCase()).append(temp.substring(1)); } return sb.toString(); } /** * 将实体类名首字母改为小写 * * @param beanName * @return */ private String processResultMapId(String beanName) { return beanName.substring(0, 1).toLowerCase() + beanName.substring(1); } /** * 构建类上面的注释 * * @param bw * @param text * @return * @throws IOException */ private BufferedWriter buildClassComment(BufferedWriter bw, String text) throws IOException { bw.newLine(); bw.newLine(); bw.write("/**"); bw.newLine(); bw.write(" * "); bw.newLine(); bw.write(" * " + text); bw.newLine(); bw.write(" * "); bw.newLine(); bw.write(" **/"); return bw; } /** * 构建方法上面的注释 * * @param bw * @param text * @return * @throws IOException */ private BufferedWriter buildMethodComment(BufferedWriter bw, String text) throws IOException { bw.newLine(); bw.write("\t/**"); bw.newLine(); bw.write("\t * "); bw.newLine(); bw.write("\t * " + text); bw.newLine(); bw.write("\t * "); bw.newLine(); bw.write("\t **/"); return bw; } /** * 生成实体类 * * @param columns * @param types * @param comments * @throws IOException */ private void buildEntityBean(List<String> columns, List<String> types, List<String> comments, String tableComment) throws IOException { File folder = new File(bean_path); if (!folder.exists()) { folder.mkdir(); } File beanFile = new File(bean_path, beanName + ".java"); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(beanFile))); bw.write("package " + bean_package + ";"); bw.newLine(); bw.write("import java.io.Serializable;"); bw.newLine(); //bw.write("import lombok.Data;"); // bw.write("import javax.persistence.Entity;"); bw = buildClassComment(bw, tableComment); bw.newLine(); bw.write("@SuppressWarnings(\"serial\")"); bw.newLine(); // bw.write("@Entity"); //bw.write("@Data"); //bw.newLine(); bw.write("public class " + beanName + " implements Serializable {"); bw.newLine(); bw.newLine(); int size = columns.size(); for (int i = 0; i < size; i++) { bw.write("\t/**" + comments.get(i) + "**/"); bw.newLine(); bw.write("\tprivate " + processType(types.get(i)) + " " + processField(columns.get(i)) + ";"); bw.newLine(); bw.newLine(); } bw.newLine(); // 生成get 和 set方法 String tempField = null; String _tempField = null; String tempType = null; for (int i = 0; i < size; i++) { tempType = processType(types.get(i)); _tempField = processField(columns.get(i)); tempField = _tempField.substring(0, 1).toUpperCase() + _tempField.substring(1); bw.newLine(); // bw.write("\tpublic void set" + tempField + "(" + tempType + " _" + _tempField + "){"); bw.write("\tpublic void set" + tempField + "(" + tempType + " " + _tempField + "){"); bw.newLine(); // bw.write("\t\tthis." + _tempField + "=_" + _tempField + ";"); bw.write("\t\tthis." + _tempField + " = " + _tempField + ";"); bw.newLine(); bw.write("\t}"); bw.newLine(); bw.newLine(); bw.write("\tpublic " + tempType + " get" + tempField + "(){"); bw.newLine(); bw.write("\t\treturn this." + _tempField + ";"); bw.newLine(); bw.write("\t}"); bw.newLine(); } bw.newLine(); bw.write("}"); bw.newLine(); bw.flush(); bw.close(); } /** * 构建Mapper文件 * * @throws IOException */ private void buildMapper() throws IOException { File folder = new File(mapper_path); if (!folder.exists()) { folder.mkdirs(); } File mapperFile = new File(mapper_path, mapperName + ".java"); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(mapperFile), "utf-8")); bw.write("package " + mapper_package + ";"); bw.newLine(); bw.newLine(); bw.write("import " + bean_package + "." + beanName + ";"); bw.newLine(); bw.write("import org.apache.ibatis.annotations.Param;"); bw.newLine(); bw.write("import java.util.List;"); bw = buildClassComment(bw, mapperName + "数据库操作接口类"); bw.newLine(); bw.newLine(); // bw.write("public interface " + mapperName + " extends " + mapper_extends + "<" + beanName + "> {"); bw.write("public interface " + mapperName + "{"); bw.newLine(); bw.newLine(); // ----------定义Mapper中的方法Begin---------- bw = buildMethodComment(bw, "查询（根据主键ID查询）"); bw.newLine(); bw.write("\tpublic " + beanName + " selectByPrimaryKey(@Param(\"id\") Long id);"); bw.newLine(); bw = buildMethodComment(bw, "查询（根据条件查询）"); bw.newLine(); bw.write("\tpublic List<" + beanName + "> selectListByOption(" + beanName + " record);"); bw.newLine(); bw = buildMethodComment(bw, "删除（根据主键ID删除）"); bw.newLine(); bw.write("\t" + "int deleteByPrimaryKey(@Param(\"id\") Long id);"); bw.newLine(); bw = buildMethodComment(bw, "添加"); bw.newLine(); bw.write("\t" + "int insert(" + beanName + " record);"); bw.newLine(); bw = buildMethodComment(bw, "添加 （匹配有值的字段）"); bw.newLine(); bw.write("\t" + "int insertSelective(" + beanName + " record);"); bw.newLine(); bw = buildMethodComment(bw, "修改 （匹配有值的字段）"); bw.newLine(); bw.write("\t" + "int updateByPrimaryKeySelective(" + beanName + " record);"); bw.newLine(); bw = buildMethodComment(bw, "修改（根据主键ID修改）"); bw.newLine(); bw.write("\t" + "int updateByPrimaryKey(" + beanName + " record);"); bw.newLine(); // ----------定义Mapper中的方法End---------- bw.newLine(); bw.write("}"); bw.flush(); bw.close(); } /** * 构建实体类映射XML文件 * * @param columns * @param types * @param comments * @throws IOException */ private void buildMapperXml(List<String> columns, List<String> types, List<String> comments) throws IOException { File folder = new File(xml_path); if (!folder.exists()) { folder.mkdirs(); } File mapperXmlFile = new File(xml_path, mapperName + ".xml"); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(mapperXmlFile))); bw.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); bw.newLine(); bw.write("<!DOCTYPE mapper PUBLIC \"-//mybatis.org//DTD Mapper 3.0//EN\" "); bw.newLine(); bw.write(" \"http://mybatis.org/dtd/mybatis-3-mapper.dtd\">"); bw.newLine(); bw.write("<mapper namespace=\"" + mapper_package + "." + mapperName + "\">"); bw.newLine(); bw.newLine(); bw.write("\t<!--实体映射-->"); bw.newLine(); bw.write("\t<resultMap id=\"" + this.processResultMapId(beanName) + "ResultMap\" type=\"" + bean_package + "." + beanName + "\">"); bw.newLine(); bw.write("\t\t<!--" + comments.get(0) + "-->"); bw.newLine(); bw.write("\t\t<id property=\"" + this.processField(columns.get(0)) + "\" column=\"" + columns.get(0) + "\" />"); bw.newLine(); int size = columns.size(); for (int i = 1; i < size; i++) { bw.write("\t\t<!--" + comments.get(i) + "-->"); bw.newLine(); bw.write("\t\t<result property=\"" + this.processField(columns.get(i)) + "\" column=\"" + columns.get(i) + "\" />"); bw.newLine(); } bw.write("\t</resultMap>"); bw.newLine(); bw.newLine(); bw.newLine(); // 下面开始写SqlMapper中的方法 // this.outputSqlMapperMethod(bw, columns, types); buildSQL(bw, columns, types); bw.write("</mapper>"); bw.flush(); bw.close(); } private void buildSQL(BufferedWriter bw, List<String> columns, List<String> types) throws IOException { int size = columns.size(); // 通用结果列 bw.write("\t<!-- 通用查询结果列-->"); bw.newLine(); bw.write("\t<sql id=\"Base_Column_List\">"); bw.newLine(); bw.write("\t\t id,"); for (int i = 1; i < size; i++) { bw.write("\t" + columns.get(i)); if (i != size - 1) { bw.write(","); } } bw.newLine(); bw.write("\t</sql>"); bw.newLine(); bw.newLine(); // 查询（根据主键ID查询） bw.write("\t<!-- 查询（根据主键ID查询） -->"); bw.newLine(); bw.write("\t<select id=\"selectByPrimaryKey\" resultType=\"" + bean_package + "." + beanName + "\" parameterType=\"java.lang." + processType(types.get(0)) + "\">"); bw.newLine(); bw.write("\t\t SELECT"); bw.newLine(); bw.write("\t\t <include refid=\"Base_Column_List\" />"); bw.newLine(); bw.write("\t\t FROM " + tableName); bw.newLine(); bw.write("\t\t WHERE " + columns.get(0) + " = #{" + processField(columns.get(0)) + "}"); bw.newLine(); bw.write("\t</select>"); bw.newLine(); bw.newLine(); // 查询完 // 查询（根据条件查询） bw.write("\t<!-- 查询（根据条件查询） -->"); bw.newLine(); bw.write("\t<select id=\"selectListByOption\" resultMap=\"" + processResultMapId(beanName) + "ResultMap\" parameterType=\"" + bean_package + "." + beanName + "\">"); bw.newLine(); bw.write("\t\t SELECT"); bw.newLine(); bw.write("\t\t <include refid=\"Base_Column_List\" />"); bw.newLine(); bw.write("\t\t FROM " + tableName); bw.newLine(); bw.write("\t\t WHERE " + columns.get(0) + " = #{" + processField(columns.get(0)) + "}"); bw.newLine(); bw.write("\t</select>"); bw.newLine(); bw.newLine(); // 查询完 // 删除（根据主键ID删除） bw.write("\t<!--删除：根据主键ID删除-->"); bw.newLine(); bw.write("\t<delete id=\"deleteByPrimaryKey\" parameterType=\"java.lang." + processType(types.get(0)) + "\">"); bw.newLine(); bw.write("\t\t DELETE FROM " + tableName); bw.newLine(); bw.write("\t\t WHERE " + columns.get(0) + " = #{" + processField(columns.get(0)) + "}"); bw.newLine(); bw.write("\t</delete>"); bw.newLine(); bw.newLine(); // 删除完 // 添加insert方法 bw.write("\t<!-- 添加 -->"); bw.newLine(); bw.write("\t<insert id=\"insert\" parameterType=\"" + bean_package + "." + beanName + "\">"); bw.newLine(); bw.write("\t\t INSERT INTO " + tableName); bw.newLine(); bw.write(" \t\t("); for (int i = 0; i < size; i++) { bw.write(columns.get(i)); if (i != size - 1) { bw.write(","); } } bw.write(") "); bw.newLine(); bw.write("\t\t VALUES "); bw.newLine(); bw.write(" \t\t("); for (int i = 0; i < size; i++) { bw.write("#{" + processField(columns.get(i)) + "}"); if (i != size - 1) { bw.write(","); } } bw.write(") "); bw.newLine(); bw.write("\t</insert>"); bw.newLine(); bw.newLine(); // 添加insert完 //--------------- insert方法（匹配有值的字段） bw.write("\t<!-- 添加 （匹配有值的字段）-->"); bw.newLine(); bw.write("\t<insert id=\"insertSelective\" parameterType=\"" + bean_package + "." + beanName + "\">"); bw.newLine(); bw.write("\t\t INSERT INTO " + tableName); bw.newLine(); bw.write("\t\t <trim prefix=\"(\" suffix=\")\" suffixOverrides=\",\" >"); bw.newLine(); String tempField = null; for (int i = 0; i < size; i++) { tempField = processField(columns.get(i)); bw.write("\t\t\t<if test=\"" + tempField + " != null\">"); bw.newLine(); bw.write("\t\t\t\t " + columns.get(i) + ","); bw.newLine(); bw.write("\t\t\t</if>"); bw.newLine(); } bw.newLine(); bw.write("\t\t </trim>"); bw.newLine(); bw.write("\t\t <trim prefix=\"values (\" suffix=\")\" suffixOverrides=\",\" >"); bw.newLine(); tempField = null; for (int i = 0; i < size; i++) { tempField = processField(columns.get(i)); bw.write("\t\t\t<if test=\"" + tempField + "!=null\">"); bw.newLine(); bw.write("\t\t\t\t #{" + tempField + "},"); bw.newLine(); bw.write("\t\t\t</if>"); bw.newLine(); } bw.write("\t\t </trim>"); bw.newLine(); bw.write("\t</insert>"); bw.newLine(); bw.newLine(); //--------------- 完毕 // 修改update方法 bw.write("\t<!-- 修 改-->"); bw.newLine(); bw.write("\t<update id=\"updateByPrimaryKeySelective\" parameterType=\"" + bean_package + "." + beanName + "\">"); bw.newLine(); bw.write("\t\t UPDATE " + tableName); bw.newLine(); bw.write(" \t\t <set> "); bw.newLine(); tempField = null; for (int i = 1; i < size; i++) { tempField = processField(columns.get(i)); bw.write("\t\t\t<if test=\"" + tempField + " != null\">"); bw.newLine(); bw.write("\t\t\t\t " + columns.get(i) + " = #{" + tempField + "},"); bw.newLine(); bw.write("\t\t\t</if>"); bw.newLine(); } bw.newLine(); bw.write(" \t\t </set>"); bw.newLine(); bw.write("\t\t WHERE " + columns.get(0) + " = #{" + processField(columns.get(0)) + "}"); bw.newLine(); bw.write("\t</update>"); bw.newLine(); bw.newLine(); // update方法完毕 // ----- 修改（匹配有值的字段） bw.write("\t<!-- 修 改-->"); bw.newLine(); bw.write("\t<update id=\"updateByPrimaryKey\" parameterType=\"" + bean_package + "." + beanName + "\">"); bw.newLine(); bw.write("\t\t UPDATE " + tableName); bw.newLine(); bw.write("\t\t SET "); bw.newLine(); tempField = null; for (int i = 1; i < size; i++) { tempField = processField(columns.get(i)); bw.write("\t\t\t " + columns.get(i) + " = #{" + tempField + "}"); if (i != size - 1) { bw.write(","); } bw.newLine(); } bw.write("\t\t WHERE " + columns.get(0) + " = #{" + processField(columns.get(0)) + "}"); bw.newLine(); bw.write("\t</update>"); bw.newLine(); bw.newLine(); } /** * 获取所有的数据库表注释 * * @return * @throws SQLException */ private Map<String, String> getTableComment() throws SQLException { Map<String, String> maps = new HashMap<String, String>(); PreparedStatement pstate = conn.prepareStatement("show table status"); ResultSet results = pstate.executeQuery(); while (results.next()) { String tableName = results.getString("NAME"); String comment = results.getString("COMMENT"); maps.put(tableName, comment); } return maps; } public void generate() throws ClassNotFoundException, SQLException, IOException { init(); String prefix = "show full fields from "; List<String> columns = null; List<String> types = null; List<String> comments = null; PreparedStatement pstate = null; List<String> tables = getTables(); Map<String, String> tableComments = getTableComment(); for (String table : tables) { columns = new ArrayList<String>(); types = new ArrayList<String>(); comments = new ArrayList<String>(); pstate = conn.prepareStatement(prefix + table); ResultSet results = pstate.executeQuery(); while (results.next()) { columns.add(results.getString("FIELD")); types.add(results.getString("TYPE")); comments.add(results.getString("COMMENT")); } tableName = table; processTable(table); // this.outputBaseBean(); String tableComment = tableComments.get(tableName); buildEntityBean(columns, types, comments, tableComment); buildMapper(); buildMapperXml(columns, types, comments); } conn.close(); } public static void main(String[] args) { try { new EntityUtil().generate(); // 自动打开生成文件的目录 Runtime.getRuntime().exec("cmd /c start explorer D:\\"); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }
