@ModelAttribute SpringMVC无法正常工作

时间：2017-10-11 11:34:51

标签： java forms maven jsp spring-mvc

我正在尝试创建一个简单的页面，我可以在填写表单时添加/编辑员工到数据库（请注意mitarbeiter =德语员工 - 对不起）。问题是当我填写表格时没有在Mitarbeiter对象中设置。我究竟做错了什么？

以下是模型：

public class Mitarbeiter implements Serializable {

private static final long serialVersionUID = -1280037900360314186L;

private int personalNummer;
private String nachname;
private String vorname;

/**
 * Default-Konstruktor
 */
public Mitarbeiter()
{
    super();
}

/**
 * Konstruktor
 * @param personalNummer
 * @param nachname
 * @param vorname
 */
public Mitarbeiter(int personalNummer, String nachname, String vorname) {
    super();
    this.personalNummer = personalNummer;
    this.nachname = nachname;
    this.vorname = vorname;
}
public int getPersonalNummer() {
    return personalNummer;
}
public String getNachname() {
    return nachname;
}
public String getVorname() {
    return vorname;
}

这是我的控制器：

@RequestMapping(value = { "/addMitarbeiter" }, method = RequestMethod.GET)
public ModelAndView addEditMitarbeiter(@ModelAttribute("mitarbeiter") Mitarbeiter mitarbeiter) {

    logger.info("Generating addEditMitarbeiter view");

    ModelAndView model = new ModelAndView();
    model.setViewName("addEditMitarbeiter");
    model.addObject("mitarbeiter", new Mitarbeiter());
    return model;
}

@RequestMapping(value = { "/saveMitarbeiter/" }, method = RequestMethod.POST)
public ModelAndView saveMitarbeiter(@ModelAttribute("mitarbeiter") Mitarbeiter mitarbeiter) {

    logger.info("Saving Mitarbeiter...");

    try {
        if (mitarbeiterDAO.getMitarbeiterByPersonalnummer(mitarbeiter.getPersonalNummer()) != null);
        mitarbeiterDAO.updateMitarbeiter(mitarbeiter);
    }
    catch (EmptyResultDataAccessException e) {
        logger.info("Neuen Mitarbeiter anlegen...");
        mitarbeiterDAO.saveMitarbeiter(mitarbeiter);
    }

    return new ModelAndView("redirect:/searchEmployee");
}

@RequestMapping(value = { "/editMitarbeiter/{personalNummer}" })
public ModelAndView editEmployee(@PathVariable("personalNummer") int personalNummer) {

    logger.info("Generating mitarbeiterEdit view");

    ModelAndView model = new ModelAndView();
    model.setViewName("addEditMitarbeiter");
    Mitarbeiter mitarbeiter = mitarbeiterDAO.getMitarbeiterByPersonalnummer(personalNummer);
    model.addObject("mitarbeiter", mitarbeiter);
    return model;
}

这是一个表格的片段，应填写并保存员工或更改到数据库：

        <form:form name="mitarbeiterForm" commandName="mitarbeiter" method='POST' action="${pageContext.request.contextPath}/saveMitarbeiter" >
    <table>
        <tr>
            <td><form:label path="personalNummer">Personalnummer:</form:label></td>
            <td><form:input type="text" path="personalNummer" /></td>
        </tr> 
        <tr>
            <td><form:label path="vorname">Vorname:</form:label></td>
            <td><form:input type="text" path="vorname" /></td>
            <td><form:label path="nachname">Nachname:</form:label></td>
            <td><form:input type="text" path="nachname" /></td>
        </tr>

如果有必要，这里还有pom.xml：

 <?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>at.business</groupId>
    <name>business_core</name>
    <version>1.0.0-BUILD-SNAPSHOT</version>
    <properties>
        <java-version>1.8</java-version>
        <org.springframework-version>4.3.7.RELEASE</org.springframework-version>
        <hibernate.version>4.3.11.Final</hibernate.version>
        <spring.security.version>3.2.3.RELEASE</spring.security.version>
        <org.aspectj-version>1.6.10</org.aspectj-version>
        <org.slf4j-version>1.6.6</org.slf4j-version>
        <mysql.connector.version>5.1.21</mysql.connector.version>
    </properties>
    <dependencies>
        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${org.springframework-version}</version>
            <exclusions>
                <!-- Exclude Commons Logging in favor of SLF4j -->
                <exclusion>
                    <groupId>commons-logging</groupId>
                    <artifactId>commons-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${org.springframework-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${org.springframework-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${org.springframework-version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>

        <!-- Spring Security -->
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>${spring.security.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>${spring.security.version}</version>
        </dependency>

        <!-- Spring Security JSP Taglib -->
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-taglibs</artifactId>
            <version>${spring.security.version}</version>
        </dependency>

        <!-- MySQL connector -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.connector.version}</version>
        </dependency>
        <!-- CGLIB is required to process @Configuration classes -->
        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib-nodep</artifactId>
            <version>2.2.2</version>
            <scope>runtime</scope>
        </dependency>

        <!-- AspectJ -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>${org.aspectj-version}</version>
        </dependency>

        <!-- Logging -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${org.slf4j-version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>${org.slf4j-version}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${org.slf4j-version}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.15</version>
            <exclusions>
                <exclusion>
                    <groupId>javax.mail</groupId>
                    <artifactId>mail</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.jms</groupId>
                    <artifactId>jms</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.sun.jdmk</groupId>
                    <artifactId>jmxtools</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>com.sun.jmx</groupId>
                    <artifactId>jmxri</artifactId>
                </exclusion>
            </exclusions>
            <scope>runtime</scope>
        </dependency>

        <!-- @Inject -->
        <dependency>
            <groupId>javax.inject</groupId>
            <artifactId>javax.inject</artifactId>
            <version>1</version>
        </dependency>

        <!-- Servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.1</version>
        </dependency>

        <!-- Test -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.7</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-eclipse-plugin</artifactId>
                <version>2.9</version>
                <configuration>
                    <additionalProjectnatures>
                        <projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
                    </additionalProjectnatures>
                    <additionalBuildcommands>
                        <buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
                    </additionalBuildcommands>
                    <downloadSources>true</downloadSources>
                    <downloadJavadocs>true</downloadJavadocs>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <compilerArgument>-Xlint:all</compilerArgument>
                    <showWarnings>true</showWarnings>
                    <showDeprecation>true</showDeprecation>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.2.1</version>
                <configuration>
                    <mainClass>org.test.int1.Main</mainClass>
                </configuration>
            </plugin>
            <!-- <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat8-maven-plugin</artifactId> 
                <version>2.2</version> <configuration> <url>http://162.253.124.18</url> <server>UnixTomcatServer</server> 
                <path>/home/porttosu</path> </configuration> </plugin> -->
        </plugins>
    </build>
    <artifactId>core</artifactId>
    <packaging>war</packaging>
</project>

2 个答案:

答案 0 :(得分：0)

删除

@ModelAttribute("mitarbeiter") Mitarbeiter mitarbeiter

来自

public ModelAndView addEditMitarbeiter(@ModelAttribute("mitarbeiter") Mitarbeiter mitarbeiter) {

应该只是

public ModelAndView addEditMitarbeiter(Model model) {

并做

model.addAttribute("mitarbeiter", new Mitarbeiter());

（模型的对象，而不是modelandview）

答案 1 :(得分：0)

一切都很好看。您在表单中使用 commandName ，这是旧方式读取请求参数值，使用 modelAttribute 而不是命令名称。

{{1}}
相关问题
最新问题