Java 代码自动生成器一键生成(VUE+JAVA后台)

Controller

    @Autowired
    private IGenTableService genTableService;

/**
     * 预览代码
     */
    @PreAuthorize("@ss.hasPermi('tool:gen:preview')")
    @GetMapping("/preview/{tableId}")
    public AjaxResult preview(@PathVariable("tableId") Long tableId) throws IOException
    {
        Map<String, String> dataMap = genTableService.previewCode(tableId);
        return AjaxResult.success(dataMap);
    }

Service

public interface IGenTableService
{
    /**
     * 预览代码
     * 
     * @param tableId 表编号
     * @return 预览数据列表
     */
    Map<String, String> previewCode(Long tableId);
}

GenTableServiceImpl

/**
     * 预览代码
     * 
     * @param tableId 表编号
     * @return 预览数据列表
     */
    @Override
    public Map<String, String> previewCode(Long tableId)
    {
        Map<String, String> dataMap = new LinkedHashMap<>();
        // 查询表信息
        GenTable table = genTableMapper.selectGenTableById(tableId);
        // 设置主子表信息
        setSubTable(table);
        // 设置主键列信息
        setPkColumn(table);
        VelocityInitializer.initVelocity();

        VelocityContext context = VelocityUtils.prepareContext(table);

        // 获取模板列表
        List<String> templates = VelocityUtils.getTemplateList(table.getTplCategory());
        for (String template : templates)
        {
            // 渲染模板
            StringWriter sw = new StringWriter();
            Template tpl = Velocity.getTemplate(template, Constants.HP_UTF8);
            tpl.merge(context, sw);
            dataMap.put(template, sw.toString());
        }
        return dataMap;
    }

VelocityUtils工具类

package com.happypay.generator.util;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;

import com.happypay.generator.domain.GenTable;
import com.happypay.generator.domain.GenTableColumn;
import org.apache.velocity.VelocityContext;
import com.alibaba.fastjson.JSONObject;
import com.happypay.common.constant.GenConstants;
import com.happypay.common.utils.DateUtils;
import com.happypay.common.utils.StringUtils;

/**
 * 模板处理工具类
 * 
 * @author happypay
 */
public class VelocityUtils
{
    /** 项目空间路径 */
    private static final String PROJECT_PATH = "main/java";

    /** mybatis空间路径 */
    private static final String MYBATIS_PATH = "main/resources/mapper";

    /** 默认上级菜单，系统工具 */
    private static final String DEFAULT_PARENT_MENU_ID = "3";

    /**
     * 设置模板变量信息
     *
     * @return 模板列表
     */
    public static VelocityContext prepareContext(GenTable genTable)
    {
        String moduleName = genTable.getModuleName();
        String businessName = genTable.getBusinessName();
        String packageName = genTable.getPackageName();
        String tplCategory = genTable.getTplCategory();
        String functionName = genTable.getFunctionName();

        VelocityContext velocityContext = new VelocityContext();
        velocityContext.put("tplCategory", genTable.getTplCategory());
        velocityContext.put("tableName", genTable.getTableName());
        velocityContext.put("functionName", StringUtils.isNotEmpty(functionName) ? functionName : "【请填写功能名称】");
        velocityContext.put("ClassName", genTable.getClassName());
        velocityContext.put("className", StringUtils.uncapitalize(genTable.getClassName()));
        velocityContext.put("moduleName", genTable.getModuleName());
        velocityContext.put("BusinessName", StringUtils.capitalize(genTable.getBusinessName()));
        velocityContext.put("businessName", genTable.getBusinessName());
        velocityContext.put("basePackage", getPackagePrefix(packageName));
        velocityContext.put("packageName", packageName);
        velocityContext.put("author", genTable.getFunctionAuthor());
        velocityContext.put("datetime", DateUtils.getDate());
        velocityContext.put("pkColumn", genTable.getPkColumn());
        velocityContext.put("importList", getImportList(genTable));
        velocityContext.put("permissionPrefix", getPermissionPrefix(moduleName, businessName));
        velocityContext.put("columns", genTable.getColumns());
        velocityContext.put("table", genTable);
        setMenuVelocityContext(velocityContext, genTable);
        if (GenConstants.HP_TPL_TREE.equals(tplCategory))
        {
            setTreeVelocityContext(velocityContext, genTable);
        }
        if (GenConstants.HP_TPL_SUB.equals(tplCategory))
        {
            setSubVelocityContext(velocityContext, genTable);
        }
        return velocityContext;
    }

    public static void setMenuVelocityContext(VelocityContext context, GenTable genTable)
    {
        String options = genTable.getOptions();
        JSONObject paramsObj = JSONObject.parseObject(options);
        String parentMenuId = getParentMenuId(paramsObj);
        context.put("parentMenuId", parentMenuId);
    }

    public static void setTreeVelocityContext(VelocityContext context, GenTable genTable)
    {
        String options = genTable.getOptions();
        JSONObject paramsObj = JSONObject.parseObject(options);
        String treeCode = getTreecode(paramsObj);
        String treeParentCode = getTreeParentCode(paramsObj);
        String treeName = getTreeName(paramsObj);

        context.put("treeCode", treeCode);
        context.put("treeParentCode", treeParentCode);
        context.put("treeName", treeName);
        context.put("expandColumn", getExpandColumn(genTable));
        if (paramsObj.containsKey(GenConstants.HP_TREE_PARENT_CODE))
        {
            context.put("tree_parent_code", paramsObj.getString(GenConstants.HP_TREE_PARENT_CODE));
        }
        if (paramsObj.containsKey(GenConstants.HP_TREE_NAME))
        {
            context.put("tree_name", paramsObj.getString(GenConstants.HP_TREE_NAME));
        }
    }

    public static void setSubVelocityContext(VelocityContext context, GenTable genTable)
    {
        GenTable subTable = genTable.getSubTable();
        String subTableName = genTable.getSubTableName();
        String subTableFkName = genTable.getSubTableFkName();
        String subClassName = genTable.getSubTable().getClassName();
        String subTableFkClassName = StringUtils.convertToCamelCase(subTableFkName);

        context.put("subTable", subTable);
        context.put("subTableName", subTableName);
        context.put("subTableFkName", subTableFkName);
        context.put("subTableFkClassName", subTableFkClassName);
        context.put("subTableFkclassName", StringUtils.uncapitalize(subTableFkClassName));
        context.put("subClassName", subClassName);
        context.put("subclassName", StringUtils.uncapitalize(subClassName));
        context.put("subImportList", getImportList(genTable.getSubTable()));
    }

    /**
     * 获取模板信息
     *
     * @return 模板列表
     */
    public static List<String> getTemplateList(String tplCategory)
    {
        List<String> templates = new ArrayList<>();
        templates.add("vm/java/domain.java.vm");
        templates.add("vm/java/mapper.java.vm");
        templates.add("vm/java/service.java.vm");
        templates.add("vm/java/serviceImpl.java.vm");
        templates.add("vm/java/controller.java.vm");
        templates.add("vm/xml/mapper.xml.vm");
        templates.add("vm/sql/sql.vm");
        templates.add("vm/js/api.js.vm");
        if (GenConstants.HP_TPL_CRUD.equals(tplCategory))
        {
            templates.add("vm/vue/index.vue.vm");
        }
        else if (GenConstants.HP_TPL_TREE.equals(tplCategory))
        {
            templates.add("vm/vue/index-tree.vue.vm");
        }
        else if (GenConstants.HP_TPL_SUB.equals(tplCategory))
        {
            templates.add("vm/vue/index.vue.vm");
            templates.add("vm/java/sub-domain.java.vm");
        }
        return templates;
    }

    /**
     * 获取文件名
     */
    public static String getFileName(String template, GenTable genTable)
    {
        // 文件名称
        String fileName = "";
        // 包路径
        String packageName = genTable.getPackageName();
        // 模块名
        String moduleName = genTable.getModuleName();
        // 大写类名
        String className = genTable.getClassName();
        // 业务名称
        String businessName = genTable.getBusinessName();

        String javaPath = PROJECT_PATH + "/" + StringUtils.replace(packageName, ".", "/");
        String mybatisPath = MYBATIS_PATH + "/" + moduleName;
        String vuePath = "vue";

        if (template.contains("domain.java.vm"))
        {
            fileName = StringUtils.format("{}/domain/{}.java", javaPath, className);
        }
        if (template.contains("sub-domain.java.vm") && StringUtils.equals(GenConstants.HP_TPL_SUB, genTable.getTplCategory()))
        {
            fileName = StringUtils.format("{}/domain/{}.java", javaPath, genTable.getSubTable().getClassName());
        }
        else if (template.contains("mapper.java.vm"))
        {
            fileName = StringUtils.format("{}/mapper/{}Mapper.java", javaPath, className);
        }
        else if (template.contains("service.java.vm"))
        {
            fileName = StringUtils.format("{}/service/I{}Service.java", javaPath, className);
        }
        else if (template.contains("serviceImpl.java.vm"))
        {
            fileName = StringUtils.format("{}/service/impl/{}ServiceImpl.java", javaPath, className);
        }
        else if (template.contains("controller.java.vm"))
        {
            fileName = StringUtils.format("{}/controller/{}Controller.java", javaPath, className);
        }
        else if (template.contains("mapper.xml.vm"))
        {
            fileName = StringUtils.format("{}/{}Mapper.xml", mybatisPath, className);
        }
        else if (template.contains("sql.vm"))
        {
            fileName = businessName + "Menu.sql";
        }
        else if (template.contains("api.js.vm"))
        {
            fileName = StringUtils.format("{}/api/{}/{}.js", vuePath, moduleName, businessName);
        }
        else if (template.contains("index.vue.vm"))
        {
            fileName = StringUtils.format("{}/views/{}/{}/index.vue", vuePath, moduleName, businessName);
        }
        else if (template.contains("index-tree.vue.vm"))
        {
            fileName = StringUtils.format("{}/views/{}/{}/index.vue", vuePath, moduleName, businessName);
        }
        return fileName;
    }

    /**
     * 获取包前缀
     *
     * @param packageName 包名称
     * @return 包前缀名称
     */
    public static String getPackagePrefix(String packageName)
    {
        int lastIndex = packageName.lastIndexOf(".");
        return StringUtils.substring(packageName, 0, lastIndex);
    }

    /**
     * 根据列类型获取导入包
     * 
     * @param genTable 业务表对象
     * @return 返回需要导入的包列表
     */
    public static HashSet<String> getImportList(GenTable genTable)
    {
        List<GenTableColumn> columns = genTable.getColumns();
        GenTable subGenTable = genTable.getSubTable();
        HashSet<String> importList = new HashSet<>();
        if (StringUtils.isNotNull(subGenTable))
        {
            importList.add("java.util.List");
        }
        for (GenTableColumn column : columns)
        {
            if (!column.isSuperColumn() && GenConstants.HP_TYPE_DATE.equals(column.getJavaType()))
            {
                importList.add("java.util.Date");
                importList.add("com.fasterxml.jackson.annotation.JsonFormat");
            }
            else if (!column.isSuperColumn() && GenConstants.HP_TYPE_BIGDECIMAL.equals(column.getJavaType()))
            {
                importList.add("java.math.BigDecimal");
            }
        }
        return importList;
    }

    /**
     * 获取权限前缀
     *
     * @param moduleName 模块名称
     * @param businessName 业务名称
     * @return 返回权限前缀
     */
    public static String getPermissionPrefix(String moduleName, String businessName)
    {
        return StringUtils.format("{}:{}", moduleName, businessName);
    }

    /**
     * 获取上级菜单ID字段
     *
     * @param paramsObj 生成其他选项
     * @return 上级菜单ID字段
     */
    public static String getParentMenuId(JSONObject paramsObj)
    {
        if (StringUtils.isNotEmpty(paramsObj) && paramsObj.containsKey(GenConstants.HP_PARENT_MENU_ID))
        {
            return paramsObj.getString(GenConstants.HP_PARENT_MENU_ID);
        }
        return DEFAULT_PARENT_MENU_ID;
    }

    /**
     * 获取树编码
     *
     * @param paramsObj 生成其他选项
     * @return 树编码
     */
    public static String getTreecode(JSONObject paramsObj)
    {
        if (paramsObj.containsKey(GenConstants.HP_TREE_CODE))
        {
            return StringUtils.toCamelCase(paramsObj.getString(GenConstants.HP_TREE_CODE));
        }
        return StringUtils.EMPTY;
    }

    /**
     * 获取树父编码
     *
     * @param paramsObj 生成其他选项
     * @return 树父编码
     */
    public static String getTreeParentCode(JSONObject paramsObj)
    {
        if (paramsObj.containsKey(GenConstants.HP_TREE_PARENT_CODE))
        {
            return StringUtils.toCamelCase(paramsObj.getString(GenConstants.HP_TREE_PARENT_CODE));
        }
        return StringUtils.EMPTY;
    }

    /**
     * 获取树名称
     *
     * @param paramsObj 生成其他选项
     * @return 树名称
     */
    public static String getTreeName(JSONObject paramsObj)
    {
        if (paramsObj.containsKey(GenConstants.HP_TREE_NAME))
        {
            return StringUtils.toCamelCase(paramsObj.getString(GenConstants.HP_TREE_NAME));
        }
        return StringUtils.EMPTY;
    }

    /**
     * 获取需要在哪一列上面显示展开按钮
     *
     * @param genTable 业务表对象
     * @return 展开按钮列序号
     */
    public static int getExpandColumn(GenTable genTable)
    {
        String options = genTable.getOptions();
        JSONObject paramsObj = JSONObject.parseObject(options);
        String treeName = paramsObj.getString(GenConstants.HP_TREE_NAME);
        int num = 0;
        for (GenTableColumn column : genTable.getColumns())
        {
            if (column.isList())
            {
                num++;
                String columnName = column.getColumnName();
                if (columnName.equals(treeName))
                {
                    break;
                }
            }
        }
        return num;
    }
}

GenTableMapper 类

    /**
     * 查询表ID业务信息
     * 
     * @param id 业务ID
     * @return 业务信息
     */
    GenTable selectGenTableById(Long id);

GenTableMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.happypay.generator.mapper.GenTableMapper">

	<resultMap type="GenTable" id="GenTableResult">
	    <id     property="tableId"        column="table_id"          />
		<result property="tableName"      column="table_name"        />
		<result property="tableComment"   column="table_comment"     />
		<result property="subTableName"   column="sub_table_name"    />
		<result property="subTableFkName" column="sub_table_fk_name" />
		<result property="className"      column="class_name"        />
		<result property="tplCategory"    column="tpl_category"      />
		<result property="packageName"    column="package_name"      />
		<result property="moduleName"     column="module_name"       />
		<result property="businessName"   column="business_name"     />
		<result property="functionName"   column="function_name"     />
		<result property="functionAuthor" column="function_author"   />
		<result property="genType"        column="gen_type"          />
		<result property="genPath"        column="gen_path"          />
		<result property="options"        column="options"           />
		<result property="createBy"       column="create_by"         />
		<result property="createTime"     column="create_time"       />
		<result property="updateBy"       column="update_by"         />
		<result property="updateTime"     column="update_time"       />
		<result property="remark"         column="remark"            />
		<collection  property="columns"  javaType="java.util.List"  resultMap="GenTableColumnResult" />
	</resultMap>

	<select id="selectGenTableById" parameterType="Long" resultMap="GenTableResult">
	    SELECT t.table_id, t.table_name, t.table_comment, t.sub_table_name, t.sub_table_fk_name, t.class_name, t.tpl_category, t.package_name, t.module_name, t.business_name, t.function_name, t.function_author, t.gen_type, t.gen_path, t.options, t.remark,
			   c.column_id, c.column_name, c.column_comment, c.column_type, c.java_type, c.java_field, c.is_pk, c.is_increment, c.is_required, c.is_insert, c.is_edit, c.is_list, c.is_query, c.query_type, c.html_type, c.dict_type, c.sort
		FROM gen_table t
			 LEFT JOIN gen_table_column c ON t.table_id = c.table_id
		where t.table_id = #{tableId} order by c.sort
	</select>

</mapper>

VelocityInitializer工厂实体类

package com.happypay.generator.util;

import java.util.Properties;
import org.apache.velocity.app.Velocity;
import com.happypay.common.constant.Constants;

/**
 * VelocityEngine工厂
 * 
 * @author happypay
 */
public class VelocityInitializer
{
    /**
     * 初始化vm方法
     */
    public static void initVelocity()
    {
        Properties p = new Properties();
        try
        {
            // 加载classpath目录下的vm文件
            p.setProperty("file.resource.loader.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
            // 定义字符集
            p.setProperty(Velocity.INPUT_ENCODING, Constants.HP_UTF8);
            p.setProperty(Velocity.OUTPUT_ENCODING, Constants.HP_UTF8);
            // 初始化Velocity引擎，指定配置Properties
            Velocity.init(p);
        }
        catch (Exception e)
        {
            throw new RuntimeException(e);
        }
    }
}

GenTable 实体类

/**
 * 业务表 gen_table
 */
@Data
@EqualsAndHashCode(callSuper = true)
@ToString(callSuper = true)
public class GenTable extends BaseEntity
{
    private static final long serialVersionUID = 1L;

    /** 编号 */
    private Long tableId;

    /** 表名称 */
    @NotBlank(message = "表名称不能为空")
    private String tableName;

    /** 表描述 */
    @NotBlank(message = "表描述不能为空")
    private String tableComment;

    /** 关联父表的表名 */
    private String subTableName;

    /** 本表关联父表的外键名 */
    private String subTableFkName;

    /** 实体类名称(首字母大写) */
    @NotBlank(message = "实体类名称不能为空")
    private String className;

    /** 使用的模板（crud单表操作 tree树表操作 sub主子表操作） */
    private String tplCategory;

    /** 生成包路径 */
    @NotBlank(message = "生成包路径不能为空")
    private String packageName;

    /** 生成模块名 */
    @NotBlank(message = "生成模块名不能为空")
    private String moduleName;

    /** 生成业务名 */
    @NotBlank(message = "生成业务名不能为空")
    private String businessName;

    /** 生成功能名 */
    @NotBlank(message = "生成功能名不能为空")
    private String functionName;

    /** 生成作者 */
    @NotBlank(message = "作者不能为空")
    private String functionAuthor;

    /** 生成代码方式（0zip压缩包 1自定义路径） */
    private String genType;

    /** 生成路径（不填默认项目路径） */
    private String genPath;

    /** 主键信息 */
    private GenTableColumn pkColumn;

    /** 子表信息 */
    private GenTable subTable;

    /** 表列信息 */
    @Valid
    private List<GenTableColumn> columns;

    /** 其它生成选项 */
    private String options;

    /** 树编码字段 */
    private String treeCode;

    /** 树父编码字段 */
    private String treeParentCode;

    /** 树名称字段 */
    private String treeName;

    /** 上级菜单ID字段 */
    private String parentMenuId;

    /** 上级菜单名称字段 */
    private String parentMenuName;

    public boolean isSub()
    {
        return isSub(this.tplCategory);
    }

    public static boolean isSub(String tplCategory)
    {
        return tplCategory != null && StringUtils.equals(GenConstants.HP_TPL_SUB, tplCategory);
    }

    public boolean isTree()
    {
        return isTree(this.tplCategory);
    }

    public static boolean isTree(String tplCategory)
    {
        return tplCategory != null && StringUtils.equals(GenConstants.HP_TPL_TREE, tplCategory);
    }

    public boolean isCrud()
    {
        return isCrud(this.tplCategory);
    }

    public static boolean isCrud(String tplCategory)
    {
        return tplCategory != null && StringUtils.equals(GenConstants.HP_TPL_CRUD, tplCategory);
    }

    public boolean isSuperColumn(String javaField)
    {
        return isSuperColumn(this.tplCategory, javaField);
    }

    public static boolean isSuperColumn(String tplCategory, String javaField)
    {
        if (isTree(tplCategory))
        {
            return StringUtils.equalsAnyIgnoreCase(javaField,
                    ArrayUtils.addAll(GenConstants.HP_TREE_ENTITY, GenConstants.HP_BASE_ENTITY));
        }
        return StringUtils.equalsAnyIgnoreCase(javaField, GenConstants.HP_BASE_ENTITY);
    }
}

预览效果