[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; 10~k2{Z
} /9*B)m"
int i1=l; $9#H04.x
int i2=mid+1; 6<SAa#@ey
for(int cur=l;cur<=r;cur++){ %lhEM}Sm
if(i1==mid+1) \ZFGw&yN
data[cur]=temp[i2++]; kx{{_w
else if(i2>r) <z&/L/bl"
data[cur]=temp[i1++]; @V sG'
else if(temp[i1] data[cur]=temp[i1++]; xC:L)7#aw
else qJs<#MQ2
data[cur]=temp[i2++]; #U4F0BdA
} Gr' CtO
} bHYy}weZ
X/!o\yyT
} @f~RdO3
wE>\7a*P%
改进后的归并排序: iL&fgF"'
6r0krbN
package org.rut.util.algorithm.support; %D34/=(X
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import org.rut.util.algorithm.SortUtil; Oc#syfO
tjGn|+|k
/** l"T44CL;
* @author treeroot ]=I@1B;_m
* @since 2006-2-2 +F` S>U
* @version 1.0 qvsd5PeCO
*/ z&)A,ryW0
public class ImprovedMergeSort implements SortUtil.Sort { OA1uY83"
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private static final int THRESHOLD = 10; Oh`69 k
%QGC8Tz
/* m+R[#GE8#
* (non-Javadoc) 3?9IJ5p
* YeL#jtC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "@@u3`#
*/ &< `NT D
public void sort(int[] data) { ?0?#U0(;u
int[] temp=new int[data.length]; QB uMJm
mergeSort(data,temp,0,data.length-1); Ad8n<zt|
} wLH>:yKUU
S>6~lb8G
private void mergeSort(int[] data, int[] temp, int l, int r) { L|:`^M+^w
int i, j, k; ZRB)uA)5=
int mid = (l + r) / 2; ->-KCd1b
if (l == r) H3^},.
return; n8 i] z
if ((mid - l) >= THRESHOLD) @7]yl&LZ
mergeSort(data, temp, l, mid); oy=js -
else w^|*m/h|@u
insertSort(data, l, mid - l + 1); !4RWYMV"
if ((r - mid) > THRESHOLD) 61>.vT8P
mergeSort(data, temp, mid + 1, r); EStB#V^
else g`' !HGY
insertSort(data, mid + 1, r - mid); R6.hA_ih
ci.+pF
for (i = l; i <= mid; i++) { $?Hu#Kn,(
temp = data; 2B[X,rL.pX
} jyUjlYAAv`
for (j = 1; j <= r - mid; j++) { 9igiZmM
temp[r - j + 1] = data[j + mid]; Q800y??&J
} u(>^3PJ+
int a = temp[l]; p!7FpxZY
int b = temp[r]; XB^'K2
for (i = l, j = r, k = l; k <= r; k++) { Vpz\.]
if (a < b) { <I\/n<*
data[k] = temp[i++]; Uw. `7b>B
a = temp; 8,4"uuI
} else { { ]{/t-=
data[k] = temp[j--]; VU(v3^1"
b = temp[j]; EF[@$j
} {_[N<U:QT&
} 'Ym9;~(@R
} vXf!G`D
eK?MKe
/** t7Iv?5]N
* @param data HZC"nb}r4
* @param l x.!V^HQSN
* @param i ZF9z~9
*/ v\gLWq'
private void insertSort(int[] data, int start, int len) { 5oW!YJg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g0=z&2Q[_)
} $oID(P
} |`2RShu
} !}#8)?p
} WUe{vV#S'0
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堆排序： p Z|V 3
x_N'TjS^{
package org.rut.util.algorithm.support; (l~AV9!m:
.\ULbN3Z
import org.rut.util.algorithm.SortUtil; 2ozax)GY
XFHYQ2ME2
/** yiXSYD
* @author treeroot fP 1[[3i
* @since 2006-2-2 }(J}f)
* @version 1.0 ;;OAQ`
*/ eCU:Q
public class HeapSort implements SortUtil.Sort{ "Y =;.:qe
_ @NL;w:!
/* (non-Javadoc) BDW^7[n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GX!G>
*/ pHXm>gTd,J
public void sort(int[] data) { jUYWrYJ
MaxHeap h=new MaxHeap(); 45@ I*`
h.init(data); SuJ aL-;
for(int i=0;i h.remove(); u^+7hkk
System.arraycopy(h.queue,1,data,0,data.length); DZ'P@f)]
} {0Yf]FQb-a
r;.yz I
private static class MaxHeap{ *SbMqASv4G
taHJ ub
void init(int[] data){ vAF "n
this.queue=new int[data.length+1]; `!;_ho
for(int i=0;i queue[++size]=data; gZ3u=uME
fixUp(size); Xv5wJlc!d
} Ct<udO
} _/s$ZCd
*MhRW,=
private int size=0; 9X+V4xux
wj$<t'MN
private int[] queue; ~rqCN,=d
urs,34h
public int get() { .LnGL]/
return queue[1]; B:yGS*.tu
} ;s= l52
L2[($l
public void remove() { W fN2bsx>
SortUtil.swap(queue,1,size--); V5nwu#
fixDown(1); ky,(xT4
} <SAzxo:I
file://fixdown *MFIV02[N
private void fixDown(int k) { ed{ -/l~j
int j; fM :]&
while ((j = k << 1) <= size) { (?1y4M
if (j < size %26amp;%26amp; queue[j] j++; ouvA~/5
if (queue[k]>queue[j]) file://不用交换 lBLARz&c#
break; 'A=^Se`=
SortUtil.swap(queue,j,k); ,GhS[VJjR
k = j; ,hm\
} YlJ@XpKM
} lV3x*4O=
private void fixUp(int k) { e{'BAj
while (k > 1) { Fc)@,/R"v
int j = k >> 1; \g`\`e53?
if (queue[j]>queue[k]) d=$Mim
break; FJGlP&v<
SortUtil.swap(queue,j,k); `!3SF|x&
k = j; @|Cz-J;D
} hn7# L
} >W=,j)MA
;LKkbT 5
} L^/5ux
e9Wa<i8
} hE'-is@7
[: n'k
SortUtil： +5g_KS
&T?RZ2
package org.rut.util.algorithm; xC?6v'
]Grek<
import org.rut.util.algorithm.support.BubbleSort; :".ARCg
import org.rut.util.algorithm.support.HeapSort; ]`!>6/[
import org.rut.util.algorithm.support.ImprovedMergeSort; ,a{P4Bq
import org.rut.util.algorithm.support.ImprovedQuickSort; ;IvY^(YS@;
import org.rut.util.algorithm.support.InsertSort; 8rAg\H3E
import org.rut.util.algorithm.support.MergeSort; WH#1zv
import org.rut.util.algorithm.support.QuickSort; > ym,{EHK
import org.rut.util.algorithm.support.SelectionSort; rQ{7j!Im
import org.rut.util.algorithm.support.ShellSort; kf\PioD8
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/** jodIv=C
* @author treeroot '6nAF
* @since 2006-2-2 T8?Ghbn
* @version 1.0 ,1.p%UE]>
*/ <6%?OJhp
public class SortUtil { e-})6)XgA
public final static int INSERT = 1; GLH0 ]
public final static int BUBBLE = 2; wQ:)KjhHH
public final static int SELECTION = 3; +[6G5cH
public final static int SHELL = 4; /wGM#sFH
public final static int QUICK = 5; '|6]_
public final static int IMPROVED_QUICK = 6; @(EAq<5{
public final static int MERGE = 7; 1SQ3-WUs
public final static int IMPROVED_MERGE = 8; Ljm[?*H#
public final static int HEAP = 9; V@.Ior}w
IkL#SgY
public static void sort(int[] data) { o)M}!MT
sort(data, IMPROVED_QUICK); >jDDQ@
} ozyX$tp
private static String[] name={ <`8n^m*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" { T/[cu<
}; T= 80,
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private static Sort[] impl=new Sort[]{ Fk&c=V;SU
new InsertSort(), \Gef \
new BubbleSort(), /*(Kr'c
new SelectionSort(), 5ORo3T%
new ShellSort(), }?$F}s-
new QuickSort(), +qN>.y!Y
new ImprovedQuickSort(), r5S[-`s;
new MergeSort(), S3C]AhW;
new ImprovedMergeSort(), Y1w9y
new HeapSort() v4!VrI
}; %"i(K@
<q58uuK
public static String toString(int algorithm){ ^`i#$
return name[algorithm-1]; ^x]r`b
} (q/e1L-S
dohA0
public static void sort(int[] data, int algorithm) { i'<[DjMDlm
impl[algorithm-1].sort(data); : g7@PJND
} B6+khuG(
+zqn<<9
public static interface Sort { 7uqzm
public void sort(int[] data); B&M%I:i
} SBu"3ym
$j%'{)gK
public static void swap(int[] data, int i, int j) { Ot0ap$&
int temp = data; TIqtF&@o4
data = data[j]; #Qw0&kM7I
data[j] = temp; l K{hVqpt
} @(w@e\Bq
} {f_={k