[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; ^>/] Qi
} DMpNmF>
int i1=l; v_L?n7c
int i2=mid+1; wNtPh&
for(int cur=l;cur<=r;cur++){ b[;Zl<
if(i1==mid+1) vIpitbFC
data[cur]=temp[i2++]; skzTw66W.
else if(i2>r) /`H{n$
data[cur]=temp[i1++]; ~z&Ho
else if(temp[i1] data[cur]=temp[i1++]; hY}.2
else <52)
data[cur]=temp[i2++]; <v+M~"%V
} =cKrp'
} cjyb:gAO
M7. fz"M
} VU ,tCTXz
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改进后的归并排序: rG"QK!R5
snti*e4"V
package org.rut.util.algorithm.support; jB-wJNP/
k`;&??
import org.rut.util.algorithm.SortUtil; l>{+X )
GkYD:o=qx
/** Q~>="Yiu
* @author treeroot NI)q<@ju
* @since 2006-2-2 C=!YcJ9
* @version 1.0 kO'_g1f<[
*/ O9jpt>:kZ
public class ImprovedMergeSort implements SortUtil.Sort { \h UE,^
vgbk {
private static final int THRESHOLD = 10; <F#/wU^9
~ s# !\Ye
/* n1+,Pe*)
* (non-Javadoc) 3E`poE
* g4CdzN~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VSQxlAGk@
*/ ;y%C\YB#
public void sort(int[] data) { S)~Riuy$
int[] temp=new int[data.length]; uU#7SX(uu
mergeSort(data,temp,0,data.length-1); ,.PW qfb
} 8j%hxAV$
aVbv.>
private void mergeSort(int[] data, int[] temp, int l, int r) { DX)T}V&mP
int i, j, k; 50J"cGs~
int mid = (l + r) / 2; \5=fC9*G
if (l == r) 53jtwklA
return; B}A7Usm
if ((mid - l) >= THRESHOLD) 8jxs%N,aI
mergeSort(data, temp, l, mid); ({l!'>?
else 0"O22<K3a
insertSort(data, l, mid - l + 1); kTe0"
if ((r - mid) > THRESHOLD) km+}./@
mergeSort(data, temp, mid + 1, r); ~.'NG? %7P
else oN/T>&d
insertSort(data, mid + 1, r - mid); _m8JU
\JX.)&> -
for (i = l; i <= mid; i++) { h=Xr J
temp = data; SpG^kI #
} g6=w MRt[
for (j = 1; j <= r - mid; j++) { #7~i.8L
temp[r - j + 1] = data[j + mid]; r\sQ8/
} 5 LZ+~!2+
int a = temp[l]; !Qd4Y=
int b = temp[r]; q>X%MN y
for (i = l, j = r, k = l; k <= r; k++) { <O#/-r>2
if (a < b) { (&x#VmDL
data[k] = temp[i++]; 2rK<UPIq
a = temp; L>qLl_.
} else { d;kdw
data[k] = temp[j--]; zFtRsa5+
b = temp[j]; D; 0iNcit
} Wi?37EHr
} 8>sToNRNe
} c%+9uu3
!Xbr7:UPN1
/** (|PxR#{l<
* @param data XdDy0e4{%<
* @param l #sq$i
* @param i ~Z'3(n*9
*/ >|[74#}7
private void insertSort(int[] data, int start, int len) { U_UX *
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B0^0d*8t|@
} 27t23@{YL
} x@I(G "
} P*#H]Pv
} 7O)U(<70
poqx O
堆排序： .cQ<F4)!tu
9W{=6D86e
package org.rut.util.algorithm.support; Vc!;O9dP
2B# ]z
import org.rut.util.algorithm.SortUtil; /l,V0+p
>HUU`= SC
/** A&2)iQ
* @author treeroot Xw=>L#Q
* @since 2006-2-2 <.0-K_
* @version 1.0 Fvy__qcHi
*/ pN)9GO5
public class HeapSort implements SortUtil.Sort{ 5_@8g+~
&sp7YkaW
/* (non-Javadoc) 4*4s{twG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dooS|Mq
*/ >5&'_
public void sort(int[] data) { 99@uU[&IJ
MaxHeap h=new MaxHeap(); 3hOiHO ;
h.init(data); IRemF@
for(int i=0;i h.remove(); 2NLD7A
System.arraycopy(h.queue,1,data,0,data.length); ?q(7avS9
} }jM&GH1
2<Tbd"x?
private static class MaxHeap{ $&96qsr
`/:ZB6
void init(int[] data){ x1\,WOrmK
this.queue=new int[data.length+1]; 9pKN^FX,76
for(int i=0;i queue[++size]=data; bu[v[U4
fixUp(size); gRS}Y8
} :A\8#]3
} F$UvYy4O d
,YYyFMC7S
private int size=0; XO+^q9
ugEh}3
private int[] queue; wuCiO;w
<FIc!
public int get() { ZR<T\w
return queue[1]; $DZ\61
} 2r2qZ#I}
05mjV6j7m
public void remove() { %O`e!p
SortUtil.swap(queue,1,size--); #Jv|zf5Z
fixDown(1); nc#}-}`5
} s l|n]#)
file://fixdown Amf gc>eJ
private void fixDown(int k) { t@[&8j2B>
int j; { as#lHn
while ((j = k << 1) <= size) { PG<tic<?
if (j < size %26amp;%26amp; queue[j] j++; =B g
if (queue[k]>queue[j]) file://不用交换 R _WP r[P
break; CfKvC
SortUtil.swap(queue,j,k); *2ZX*w37
k = j; /s"mqBXCG
} ;Bk?,g
} x2*l5t
private void fixUp(int k) { I@a y&NNh
while (k > 1) { HV-c DL
int j = k >> 1; ;0ap#6T
if (queue[j]>queue[k]) )mw#MTv<[
break; +:3K?G-
SortUtil.swap(queue,j,k); ct+ ;W
k = j; g5X;]%:
} ;uj&j1
} >J+'hm@
C?jk#T
} >58N P1[k
j+He8w-4
} <rZ(B>$
K' xN>qc
SortUtil： 9P;}P!W
xT7JGQ[|
package org.rut.util.algorithm; { O+d7,C
#nV F.
import org.rut.util.algorithm.support.BubbleSort; Gf'qPLK0
import org.rut.util.algorithm.support.HeapSort; G+2!+N\P
import org.rut.util.algorithm.support.ImprovedMergeSort; u`I&&
import org.rut.util.algorithm.support.ImprovedQuickSort; ;i*<HNQ
import org.rut.util.algorithm.support.InsertSort; p|!5G&O,
import org.rut.util.algorithm.support.MergeSort; U5N/'p%)<
import org.rut.util.algorithm.support.QuickSort; #@s[!4)_I
import org.rut.util.algorithm.support.SelectionSort; lXH?*
import org.rut.util.algorithm.support.ShellSort; e P]L
#=mLQSiQ
/** yd#SB)&
* @author treeroot P_S^)Yo
* @since 2006-2-2 %5#ts/f
* @version 1.0 t*Hr(|.
*/ FCL7Tn
public class SortUtil { &)[?D<
public final static int INSERT = 1; N>kY$*
public final static int BUBBLE = 2; 1h uU7xuf
public final static int SELECTION = 3; THC7e>P4
public final static int SHELL = 4; G`H4#@]
public final static int QUICK = 5; Fk(nf9M%
public final static int IMPROVED_QUICK = 6; _L}k.
public final static int MERGE = 7; to-DXT.
public final static int IMPROVED_MERGE = 8; 0LEJnl
public final static int HEAP = 9; 84g$V}mp
\)KLm
public static void sort(int[] data) { RCM;k;@8V
sort(data, IMPROVED_QUICK); 1vKAJ<4W
} @r7ekyO8)
private static String[] name={ /Kcp9Qx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e ]-fb{oVH
}; f793yCiG
gR7in!8
private static Sort[] impl=new Sort[]{ F/gA[Y|,gI
new InsertSort(), .g/PWEr\I
new BubbleSort(), uG-t)pej
new SelectionSort(), vmEbk/Vy
new ShellSort(), {A<pb{<u
new QuickSort(), P/%5J3_,
new ImprovedQuickSort(), yN-o?[o
new MergeSort(), X5[.X()M4
new ImprovedMergeSort(), Qy0Zj$,Z
new HeapSort() u={A4A#
}; \!`k:lusa
@8\7H'K"\
public static String toString(int algorithm){ X#v6v)c
return name[algorithm-1]; 'M20v-[
} {`RCh]W
py\KY R
public static void sort(int[] data, int algorithm) { ]#$l"ss,
impl[algorithm-1].sort(data); fkKk/M>1
} .J=<E
CuT~ Bj
public static interface Sort { iO$Z?Dyg9
public void sort(int[] data); 95cIdF 6m
} c+dmA(JC
Z+p'3
public static void swap(int[] data, int i, int j) { {Xr|L
int temp = data; Hs9; &C
data = data[j]; 'xK ,|U
data[j] = temp; 7-#R[8S
} IOL5p*:gz
} 79HKfG2+KB