Error: java.io.IOException: Type mismatch in key from map怎么解决

Error: java.io.IOException: Type mismatch in key from map: expected org.apache.hadoop.io.IntWritable, received org.apache.hadoop.io.Text怎么解决

运行结果图
Error: java.io.IOException: Type mismatch in key from map怎么解决
main代码图和 Reducer图和 Map图
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Error: java.io.IOException: Type mismatch in key from map怎么解决
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Error: java.io.IOException: Type mismatch in key from map怎么解决

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