开发小工具(实体类、返回map，sql语句自动生成)

创建工程、导入maven依赖

1.添加Thymeleaf依赖

要想使用Thhymeleaf，首先要在pom.xml文件中单独添加Thymeleaf依赖。

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
  </dependency>

SpringBoot默认存放模板页面的路径在src/main/resources/templates或者src/main/view/templates，这个无论是使用什么模板语言都一样，当然默认路径是可以自定义的，不过一般不推荐这样做。另外Thymeleaf默认的页面文件后缀是.html

2.视图控制类 ViewsController.java

@Controller
@RequestMapping(value = "/views")
public class ViewsController {
    
    
	
	@RequestMapping("/{view}")
	public String toView(@PathVariable("view") String view) {
    
    
		return String.format("%s", view);
	}

	@RequestMapping("{model}/{view}")
	public String toView(@PathVariable("model") String model, @PathVariable("view") String view) {
    
    
		return String.format("%s/%s", model, view);
	}

	@RequestMapping("{model}/{module}/{view}")
	public String toSubView(@PathVariable("model") String model, @PathVariable("module") String module,
			@PathVariable("view") String view) {
    
    
		return String.format("%s/%s/%s", model, module, view);
	}
	
	@RequestMapping("{model}/{module}/{view}/{subview}")
	public String toSubSubView(@PathVariable("model") String model, @PathVariable("module") String module,
			@PathVariable("view") String view,@PathVariable("subview") String subview) {
    
    
		return String.format("%s/%s/%s/%s", model, module, view,subview);
	}

}

3.工具控制类 ToolController.java 用于返回table实体数据

@RestController
@RequestMapping("/tool")
public class ToolController  extends BaseController{
    
    
	//jdbc
	@Resource
	private ToolService toolService;
	
	/**
	 * 获取表信息
	 * @param response
	 * @param tableName
	 * @throws Exception
	 */
	@RequestMapping("getTableInfo")
	@ResponseBody
	public BaseResult<?> getTableInfo(HttpServletResponse response, @RequestParam(defaultValue = "") String tableName) throws Exception {
    
    
		List<Map<String,String>> tableInfoMap = toolService.getTableInfoList(tableName);
		return  ResultUtils.build(tableInfoMap);
	}
}

4.ToolService.java 工具服务自定义数据库设置实体类属性
金额使用BigDecimal避免丢失精度，可以根据Oracle和MySQL字段属性自定义设置

**
 * 工具服务
 * @author liucw
 *
 */
@Service
public class ToolService {
    
    

	@Autowired
    private JdbcTemplate jdbcTemplate;
	
	/**
	 * 通过表名获取表的信息
	 * @param tableName
	 * @return
	 * @throws Exception
	 */
	public List<Map<String,String>> getTableInfoList(String tableName) throws Exception {
    
    
		String sql = "select * from "+tableName;
		SqlRowSet sqlRowSet = jdbcTemplate.queryForRowSet(sql);
		SqlRowSetMetaData sqlRsmd = sqlRowSet.getMetaData();
		List<Map<String,String>> tableFieldList = new ArrayList<Map<String,String>>();
		int columnCount = sqlRsmd.getColumnCount();
		for (int i = 1; i <= columnCount; i++) {
    
    
			Map<String,String> fieldMap = new HashMap<String,String>();
			String columnName = sqlRsmd.getColumnName(i);
			String columnType = sqlRsmd.getColumnTypeName(i);
			if(columnType.equalsIgnoreCase("NUMBER")||columnType.equalsIgnoreCase("INTEGER")||columnType.equalsIgnoreCase("INT")||columnType.equalsIgnoreCase("SMALLINT")||columnType.equalsIgnoreCase("TINYINT")) columnType="Integer";
			else  if(columnType.equalsIgnoreCase("VARCHAR")||columnType.equalsIgnoreCase("NCHAR")||columnType.equalsIgnoreCase("NVARCHAR2")||columnType.equalsIgnoreCase("VARCHAR2")|columnType.equalsIgnoreCase("CHAR")||columnType.equalsIgnoreCase("LONG VARCHAR")) columnType="String";
			else  if(columnType.equalsIgnoreCase("BIGINT"))columnType="Long";
		/*	else  if(columnType.equalsIgnoreCase("DECIMAL"))columnType="Double";
			else  if(columnType.equalsIgnoreCase("FLOAT"))columnType="Float";*/
			else  if(columnType.equalsIgnoreCase("DECIMAL"))columnType="BigDecimal";
			else  if(columnType.equalsIgnoreCase("FLOAT"))columnType="BigDecimal";
			else  if(columnType.equalsIgnoreCase("TEXT"))columnType="String";
			else  if(columnType.equalsIgnoreCase("DATE"))columnType="Date";
			else  if(columnType.equalsIgnoreCase("DATETIME"))columnType="Date";
			else  if(columnType.equalsIgnoreCase("JSON"))columnType="JsonNode";
			else  if(columnType.equalsIgnoreCase("TIMESTAMP"))columnType="Timestamp";
			else columnType="不支持类型";
			
			fieldMap.put("columnName", columnName);
			fieldMap.put("columnType", columnType);
			tableFieldList.add(fieldMap);
		}  
		return tableFieldList;
	}
}

5.js脚本，前端当然少不了啦。
在这里插入图片描述
code_create.js

$(document).ready(function(){
    
    
	$('#submitClick').click(function(){
    
    
		var url = basePath + "tool/getTableInfo";
		var param = {
    
    };	
		
		$('._form').each(function() {
    
    
			var name = $(this).attr('id');
			var value = $(this).val();
			param[name] = value;
		});
		
		var tableName = $("#tableName").val();
		$.post(url, param, function(returnedData, status) {
    
    
			console.log(returnedData)
			if ("success" == status) {
    
    
				var columnList = returnedData.data;
				var classCode = "";
				var insertSql = "insert into " + tableName + "(";
				var updateSql = "update "+tableName+" set ";
				var sqlMap = "<resultMap id=\"\" type=\"\">\n";
				var columns = "";
				var props = "";
				var updateValues = "";
				var sqlMapResult = "";
				for(var i=0;i<columnList.length;i++) {
    
    
					columns = columns + "," + columnList[i].columnName;
					var p = "private "+columnList[i].columnType + " ";
					var columnName = columnList[i].columnName.toLowerCase();
					var attrName_t = "";
					if(columnName.indexOf("_")>=0) {
    
    
						var attrNames = columnName.split("_");
						for(var k=0;k<attrNames.length;k++) {
    
    
							var at = attrNames[k];
							if(k>0) {
    
    
							 	at = attrNames[k].substring(0,1).toUpperCase() + attrNames[k].substring(1,attrNames[k].length); 转大写

							}
							attrName_t = attrName_t + at;
						}
					}
					if(attrName_t != "") {
    
    
						columnName=attrName_t;
					}
					props = props + ",#{" + columnName +"}";
					sqlMapResult = sqlMapResult + "<result property=\""+columnName+"\" column=\""+columnList[i].columnName+"\"/>\n";
					updateValues = updateValues + "," + columnList[i].columnName + "=#{"+columnName+"}";
					classCode = classCode + p + " " + columnName +";//\n";
				}
				sqlMap = sqlMap + sqlMapResult + "</resultMap>";
				$("#classCode").val(classCode);
				$("#resultMap").val(sqlMap);
				insertSql = insertSql + columns.replace(",","") + ") values(" + props.replace(",","") + ")";
				updateSql = updateSql + updateValues.replace(",","") + "where ";
				$("#sqlCode").val(insertSql+"\n\n\n\n"+updateSql);
			} else {
    
    
                console.log(returnedData);
				console.log(returnedData)
			}
		}, "json").error(function(data,errorText,errorType){
    
    
			//alert(data);
            console.log(data)
		});
	});
});

jquery 自行导入，在code_ceate.html引用脚本

6.code_create.html 主界面

<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
<script th:src="${#httpServletRequest.contextPath + '/static/scripts/jquery-1.11.1.js?r=2'}" type="text/javascript"></script>
<input name="basePath" id="basePath" type="hidden" th:value="${#httpServletRequest.scheme+'://'+#httpServletRequest.serverName+':'+#httpServletRequest.serverPort+#httpServletRequest.contextPath+'/'}"/>
<script type="text/javascript">
	var basePath = $("#basePath").val();
	//定义replaceAll方法
	String.prototype.replaceAll = function(s1,s2){
    
        
		return this.replace(new RegExp(s1,"gm"),s2);    
	};
</script>
<script th:src="${#httpServletRequest.contextPath + '/static/scripts/code_create.js?r=2'}" type="text/javascript"></script>
</head>
<body>
	<div class="contBox m-l100 m-t30">
   <form id="form1" name="form1" method="get" action="" onSubmit="javascript:return false;" autocomplete="off">	
    <div class="formBox formBox-add">
	 <table class="table_form_h" width="100%" border="0" cellpadding="1" cellspacing="1">
      <tr>
      	<td width="50%" nowrap="nowrap" >&nbsp;&nbsp;数据表名称：
      	<input type="text" id="tableName" name="tableName" maxlength="50" class="_form"></input>&nbsp;<font color="red">*</font>
      	<input type="button" value="确 定" class="button spmg-right" id="submitClick" />
      	</td>
      </tr>
      <tr>
      	<td>
      		<textarea id="classCode" rows="30" cols="30"></textarea>
      		<textarea id="resultMap" rows="30" cols="50"></textarea>
      		<textarea id="sqlCode" rows="30" cols="90"></textarea>
      	</td>
      </tr>
     </table>
     </div>
     </form>
     </div>
</body>
</html>

7.访问url http://localhost:8064/views/code_create
输入表名称点击确定生成实体类属性，xml返回map ,以及sql
在这里插入图片描述
也可以使用mybatis 逆向自动生成，

开发小工具(实体类、返回map，sql语句自动生成)

创建工程、导入maven依赖

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