[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; tZ=BK:39\
} [(`T*c.#.X
int i1=l; |zvxKIW;wd
int i2=mid+1; tGd9Cs9D<
for(int cur=l;cur<=r;cur++){ /Yx 1S'5
if(i1==mid+1) G_[|N>
data[cur]=temp[i2++]; "^<:7_Y
else if(i2>r) 5<a)SP 0
data[cur]=temp[i1++]; _hMVv&$
else if(temp[i1] data[cur]=temp[i1++]; ~@bCSOIy
else G+'MTC_
data[cur]=temp[i2++]; 9))%tYN
} _e8@y{/~Fd
} PKfxL}:"8
oRy?Dx+H
} eJ%~6c`@!
[gzw<b:`
改进后的归并排序: BaiC;&(
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package org.rut.util.algorithm.support; n4k.tq
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import org.rut.util.algorithm.SortUtil; F^T7u?^)
zG@9-s* L
/** / vje='[!
* @author treeroot \E?1bc{\f
* @since 2006-2-2 zmf5!77
* @version 1.0 \#2,1W@
*/ Fdu0?H2TL
public class ImprovedMergeSort implements SortUtil.Sort { P!B\:B%4~]
fPK|Nw]b
private static final int THRESHOLD = 10; wXXv0OzK
Qh/yPOSm:
/* lUCdnp;w'
* (non-Javadoc) )@1_Dm@0b
* *qY`MW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "@GopD
*/ Zf]d'oW{/
public void sort(int[] data) { )5d&K8@
int[] temp=new int[data.length]; Gk799SDL
mergeSort(data,temp,0,data.length-1); IH[/fd0
} 1xM&"p:
>\}2("bv
private void mergeSort(int[] data, int[] temp, int l, int r) { JYm@Llf)$
int i, j, k; X-oou'4<
int mid = (l + r) / 2; ]4uIb+(S
if (l == r) ]wa?~;1^&
return; @%ChPjN
if ((mid - l) >= THRESHOLD) NqhRJa63
mergeSort(data, temp, l, mid); \+Qx}bS{
else 4w]u: eU
insertSort(data, l, mid - l + 1); Ha)w*1&w"
if ((r - mid) > THRESHOLD) }4_izKS
mergeSort(data, temp, mid + 1, r); cQgmRHZ]
else %tUJ >qYU
insertSort(data, mid + 1, r - mid); 3iH!;`i
Zn#ri 8S
for (i = l; i <= mid; i++) { @YpA'cX7
temp = data; u4z]6?,"e
} @] )a
for (j = 1; j <= r - mid; j++) { u"pn'H
temp[r - j + 1] = data[j + mid]; j]Rl1~+M
} JkQ4'$:
int a = temp[l]; @tDVW*!
int b = temp[r]; w4(DR?[nC
for (i = l, j = r, k = l; k <= r; k++) { `'Z ;+h]
if (a < b) { 6G@_!i*2F
data[k] = temp[i++]; T`a [~:
a = temp; {v;Y}o-p
} else { qG=`'%,m
data[k] = temp[j--]; TrkoLJmB
b = temp[j]; x0Tb7y`
} tJHzhH)
} J&8l1{gd
} VCbnS191*
Gtg;6&2
/** [2)Y0; ["
* @param data bmt2~!
* @param l jew?cnRmd
* @param i Z"e|DP`
*/ dBobVT'
private void insertSort(int[] data, int start, int len) { De4+4&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P}?,*'b
} A`X$jpAn&
} =H!u4
} 9-bDgzk
} 5Z`f)qE
]dk~C?H
堆排序： Qs;bVlp!H
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package org.rut.util.algorithm.support; )5&w
6"jq/Pu
import org.rut.util.algorithm.SortUtil; v C><N
ZZl)p\r
/** !\?? [1_e
* @author treeroot (MNbABZQ
* @since 2006-2-2 7U?x8%H*
* @version 1.0 sEhdkN}6
*/ 7z F29gC
public class HeapSort implements SortUtil.Sort{ q1NAKcA<U
bX5>qqB]
/* (non-Javadoc) oEKLuy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4V<s"
*/ _Y}(v((;
public void sort(int[] data) { %Vive2j C
MaxHeap h=new MaxHeap(); P"3{s+ r
h.init(data); uWi+F)GS^K
for(int i=0;i h.remove(); w(.k6:e
System.arraycopy(h.queue,1,data,0,data.length); Bv!j.$0d{
} 1_GUi
v0=^Hym
private static class MaxHeap{ }1d 6d3b
PN0:,.4
void init(int[] data){ ]hv4EL(zi
this.queue=new int[data.length+1]; oD~VK,.
for(int i=0;i queue[++size]=data; 8n);NZ
fixUp(size); obaJT"1
} KQQR"[z&V
} <P}{0Y~@*W
-br/
private int size=0; !*+~R2&b
[^~Fu9+"
private int[] queue; 'S@C,x%2,
",`fGu )
public int get() { 7(Y!w8q&^
return queue[1]; u -CY-
} 2-]gHAw%
MCL5a@BX)
public void remove() { /`}C~
SortUtil.swap(queue,1,size--); .CrahV1G
fixDown(1); m3P%E8<Q#
} YG"P:d;s
file://fixdown &7|=8Z[o
private void fixDown(int k) { q.uIZ
int j; wgzjuTqwBF
while ((j = k << 1) <= size) { 73 D|gF*
if (j < size %26amp;%26amp; queue[j] j++; 2/qfK+a
if (queue[k]>queue[j]) file://不用交换 O2ety2}?f
break; Fu{[5uv
SortUtil.swap(queue,j,k); X:@nROL^7
k = j; |giK]Z
} 9IC"p<D
} AEOo]b*&d
private void fixUp(int k) { 5JIa?i>B
while (k > 1) { `!>zYcmT
int j = k >> 1; 'hf-)\Ylf
if (queue[j]>queue[k]) YeYFPi#
break; zZ OoPE
SortUtil.swap(queue,j,k); _"##p
k = j; Qh%7RGh_
} }qi6K-,oU
} s|%mGt &L
j?[fpN$
} VG q'
.oN<c]iqE
} >2vl & (
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SortUtil： 6=MejT
dkLc"$(O
package org.rut.util.algorithm; `f8{^Rau
9k&lq$
import org.rut.util.algorithm.support.BubbleSort; E6y/,s^~S_
import org.rut.util.algorithm.support.HeapSort; (ZT*EFhb(
import org.rut.util.algorithm.support.ImprovedMergeSort; ~EpMO]I
import org.rut.util.algorithm.support.ImprovedQuickSort; V0c*M>V
import org.rut.util.algorithm.support.InsertSort; aq0J }4U
import org.rut.util.algorithm.support.MergeSort; XDz![s
import org.rut.util.algorithm.support.QuickSort; ,#`gwtFG
import org.rut.util.algorithm.support.SelectionSort; e7>)Z
import org.rut.util.algorithm.support.ShellSort; D0us<9q
Bwn9ZYu#r
/** -TjYQ
* @author treeroot "7l p|0I
* @since 2006-2-2 @@'zMV%
* @version 1.0 [/6$P[
*/ iG6 ^s62z7
public class SortUtil { t \Fc <
public final static int INSERT = 1; ipw_AC~
public final static int BUBBLE = 2; aVO5zR./)
public final static int SELECTION = 3; `a3q)}*Y
public final static int SHELL = 4; QKE$>G
public final static int QUICK = 5; w`c9_V
public final static int IMPROVED_QUICK = 6; J,4]du$
public final static int MERGE = 7; 43A6B
public final static int IMPROVED_MERGE = 8; /-8v]nRB
public final static int HEAP = 9; X>wB=z5PXK
G>YJ3p7
public static void sort(int[] data) { 9c=Y+=<
sort(data, IMPROVED_QUICK); (|bMtT?"x
} n-}:D<\7
private static String[] name={ l:z:tJ#(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VahR nD
}; B5 C]4
(X)$8y
private static Sort[] impl=new Sort[]{ "of(,p
new InsertSort(), ^ B=x-G.
new BubbleSort(), Q7N4@w;e
new SelectionSort(), OcQ_PE5\
new ShellSort(), B(:Kw;r?
new QuickSort(), "SNsOf
new ImprovedQuickSort(), K.*?\)&
new MergeSort(), 0`h[|FYV
new ImprovedMergeSort(), P9B@2#
new HeapSort() )XnG.T{0|
}; +&4PGv53J
QTz{ZNi!
public static String toString(int algorithm){ 28f-8B
return name[algorithm-1]; 7. G
} PUltn}M
eG"iJ%I
public static void sort(int[] data, int algorithm) { 8!VjXj"
impl[algorithm-1].sort(data); "f!*%SR: 1
} d;mQ=k 1
@7u4v%,wB
public static interface Sort { "2HRuqf
public void sort(int[] data); ~9kvC&/{[
} ,^26.p$
@Sq=#f/=
public static void swap(int[] data, int i, int j) { wju~5
int temp = data; `DG6ollp{
data = data[j]; at,Xad\j
data[j] = temp; #7lkj:j4
} thipfS
} iJ?8)}