[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; N/MUwx;P
} 8; 0A g
int i1=l; aWR}R>E
int i2=mid+1; (KDD e}f
for(int cur=l;cur<=r;cur++){ J1C3&t}
if(i1==mid+1) gaZu;t2u
data[cur]=temp[i2++]; -;^j:L{
else if(i2>r) n$$SNWgM
data[cur]=temp[i1++]; tp63@L|Q
else if(temp[i1] data[cur]=temp[i1++]; n(;|q&3
else tFp Ygff<
data[cur]=temp[i2++]; s~5[![1 K
} x-^`~p
} z=q3Zo
K/IWH[
} ]&lY%"U$i
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改进后的归并排序: )b)-ZS7
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package org.rut.util.algorithm.support; ^")Q YE
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import org.rut.util.algorithm.SortUtil; Nn!+,;ut
--$ 4Q(#
/** old(i:2
* @author treeroot : y%d
* @since 2006-2-2 g/CSGIIT
* @version 1.0 r]:(Vk]|F
*/ {zQ8)$CQ
public class ImprovedMergeSort implements SortUtil.Sort { ChGYTn`X
au: fw
private static final int THRESHOLD = 10; /_I]H
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/* 5Co
* (non-Javadoc) F8jd'OR
* L^@'q6*}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oX30VfT
*/ 5z7U1:
public void sort(int[] data) { gOSJM1Mr3
int[] temp=new int[data.length]; ME46V6[LX]
mergeSort(data,temp,0,data.length-1); =P't(<
} Q(wx nm
d3ZdB4L
private void mergeSort(int[] data, int[] temp, int l, int r) { 6dabU*
int i, j, k; J8uLJ
int mid = (l + r) / 2; J??-j
if (l == r) g jDh?I
return; 1OCeN%4]Qk
if ((mid - l) >= THRESHOLD) D~S<U
mergeSort(data, temp, l, mid); ^o3"#r{:+
else Ve}(s?hU5
insertSort(data, l, mid - l + 1); _(%d(E2?
if ((r - mid) > THRESHOLD) <D<4BnZ(
mergeSort(data, temp, mid + 1, r); [ 9 {*94M
else I,>-tGK
insertSort(data, mid + 1, r - mid); e:fy#,HEj{
xS4w5i2
for (i = l; i <= mid; i++) { 8m2Tk\;:
temp = data; *|%@6I(
} de.&`lPRf
for (j = 1; j <= r - mid; j++) { Dz>^IMsY
temp[r - j + 1] = data[j + mid]; )h"<\%LU
} 8!O5quEc
int a = temp[l]; uwzvbgup?
int b = temp[r]; [$0p+1
for (i = l, j = r, k = l; k <= r; k++) { l=S35og
if (a < b) { e6@=wnoX u
data[k] = temp[i++]; re/@D@%
a = temp; {C=NUK%?
} else { ] o*#t
data[k] = temp[j--]; BLfTsNzmt
b = temp[j]; *scVJ
} JD)(oK%C
} <*16(!k0
} tItX y
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/** nw-xSS{
* @param data gw#5jW\
* @param l XewVcRo
* @param i 27 ]':A4_
*/ TSTl+W
private void insertSort(int[] data, int start, int len) { ]zj9A]i:a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R "n5
} ^U `[(kz=
} Ixb=L(V
} 2|3)S`WZl
} RQ vft
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堆排序： "+kL)]
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package org.rut.util.algorithm.support; ii[F]sR\
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import org.rut.util.algorithm.SortUtil; = s>T;|
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/** HG^B#yX
* @author treeroot Isvx7$Vu+
* @since 2006-2-2 6h|q'.Y
* @version 1.0 z.7cy@N6
*/ f[<m<I
public class HeapSort implements SortUtil.Sort{ \Jx04[=
K&vF0*gN3
/* (non-Javadoc) aZ2!i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]NUl9t*N4
*/ JlH&??
public void sort(int[] data) { K(q+ "
MaxHeap h=new MaxHeap(); ]$ L|
h.init(data); 'n{Nvt.c
for(int i=0;i h.remove(); +c(zo4nZ
System.arraycopy(h.queue,1,data,0,data.length); ^T*?>%`
} iq8GrdL"
vI:;A/&
private static class MaxHeap{ AqWUwK9T
v*'^r)Q[p
void init(int[] data){ LxYrl-
this.queue=new int[data.length+1]; UJD 0K]s
for(int i=0;i queue[++size]=data; o)Iff)m$
fixUp(size); $;1#To
} 3,p]/Z_
} +MR.>"
8$")%_1]
private int size=0; 9!6f-K
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private int[] queue; Ja,wfRq
s3~lT.
public int get() { &M46&^Jho
return queue[1]; kStnb?nk
} 5Sm}nH
a][f
public void remove() { G9Y#kBr
SortUtil.swap(queue,1,size--); .X@FXx&
fixDown(1); )Ub_@)X3%l
} ^A!Qc=#z}
file://fixdown ;T"zV{;7BR
private void fixDown(int k) { HBy[FYa4
int j; 1,6}_MA
while ((j = k << 1) <= size) { @Ws*QTlV
if (j < size %26amp;%26amp; queue[j] j++; n,jKmA
if (queue[k]>queue[j]) file://不用交换 hlV=qfc
break; igkYX!0#8O
SortUtil.swap(queue,j,k); 1Yq?X:
k = j; 8B/\U'
} s8ywKTR-
} LgKaPg$
private void fixUp(int k) { _Tf4WFu2
while (k > 1) { CLRiJ*U
int j = k >> 1; ZIf
if (queue[j]>queue[k]) 5*j?E
break; /I1h2E
SortUtil.swap(queue,j,k); 0rOfrTNOz%
k = j; )k\H@Dy%$
} +1uF !G&l
} KV}FZ3jY
qs1 ?IYD
} 4A8;tU$&
G'oG</A
} ~ DBcIy?
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SortUtil： ZjgsR|i
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package org.rut.util.algorithm; 9`1O"R/
.LZwuJ^;
import org.rut.util.algorithm.support.BubbleSort; ).Fpgxs
import org.rut.util.algorithm.support.HeapSort; ySx>LuY#3
import org.rut.util.algorithm.support.ImprovedMergeSort; 8VeQ-#7M/
import org.rut.util.algorithm.support.ImprovedQuickSort; isQ[ Gc!8
import org.rut.util.algorithm.support.InsertSort; !B\R''J5
import org.rut.util.algorithm.support.MergeSort; ,VCyG:dw
import org.rut.util.algorithm.support.QuickSort; W{5#@_pL
import org.rut.util.algorithm.support.SelectionSort; {1IfU
import org.rut.util.algorithm.support.ShellSort; ZX>AE3wk
S4'
/** T;L>;E>B
* @author treeroot (MR_^t
* @since 2006-2-2 zfc'=ODX
* @version 1.0 SW*"\X;
*/ H| 8Qp*
public class SortUtil { >d,jKlh^.%
public final static int INSERT = 1; v16JgycM
public final static int BUBBLE = 2; n2]/v{E;/
public final static int SELECTION = 3; hM;lp1l
public final static int SHELL = 4; ->l%TCHP
public final static int QUICK = 5; R$q; !
public final static int IMPROVED_QUICK = 6; X#*JWQO=
public final static int MERGE = 7; qT%FmX
public final static int IMPROVED_MERGE = 8; I$<<(VWH
public final static int HEAP = 9; ;g@4|Ro
T?x[C4wf+
public static void sort(int[] data) { 8dO!
sort(data, IMPROVED_QUICK); =-8bsV/l
} ;LG#.~f
private static String[] name={ *QwY]j%^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^5H >pat
}; <g1hxfKx5
i>D.!x
private static Sort[] impl=new Sort[]{ qyF{f8pzq
new InsertSort(), luo
new BubbleSort(), '^No)n\`
new SelectionSort(), O_ChxX0KP
new ShellSort(), QWD'!)Zb
new QuickSort(), xD5:RE~g
new ImprovedQuickSort(), j/fzzI0@
new MergeSort(), f|B=_p80
new ImprovedMergeSort(), :+qF8t[L
new HeapSort() ;nodjbr,j
}; y0#u9t"Z;
} ud0&Oe{
public static String toString(int algorithm){ kMb}1J0i"
return name[algorithm-1]; h-G)o[MA
} _CmOd-y
vbb5f#WZ
public static void sort(int[] data, int algorithm) { )2bvQy8K
impl[algorithm-1].sort(data); 4x
} ~R22?g.
JT-J#Ag
public static interface Sort { )/pU.Z/
public void sort(int[] data); DVSL [p?_
} np8gKVD
|C!oxhu<
public static void swap(int[] data, int i, int j) { ^G4Py<s
int temp = data; y9x w 9l'
data = data[j]; `8AR_7i
data[j] = temp; hp#W9@NR
} 8n'B6hi
} :c8&N-`