[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; S~9kp?kR$
} uy%PTi+A
int i1=l; 0-O.*Q^
int i2=mid+1; KFrmH
for(int cur=l;cur<=r;cur++){ \) ONy9
if(i1==mid+1) K%@SS8!oy
data[cur]=temp[i2++]; K#yH\fn8
else if(i2>r) 9Qd'=JQl
data[cur]=temp[i1++]; Ceb i9R[
else if(temp[i1] data[cur]=temp[i1++]; g5'bUYsa
else mM%BO(X{=
data[cur]=temp[i2++]; `I<|*vW u
} h^X.e[
} jpS#'h
&BR?;LD
} -$p-o Z)
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改进后的归并排序: ,6)y4=8 L
pAL-Pl9z
package org.rut.util.algorithm.support; wBGxJ\+M
4r!40^:2
import org.rut.util.algorithm.SortUtil; 0]W/88ut*u
{u][q &n
/** xef7mx
* @author treeroot ?*dx=UI
* @since 2006-2-2 t;6/bT-
* @version 1.0 =jHy6)6w
*/ X28WQdP,7
public class ImprovedMergeSort implements SortUtil.Sort { $dUN+9
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private static final int THRESHOLD = 10; +t6m>IBu
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/* 5jk4k c
* (non-Javadoc) ~+ur*3X
* &(7Io?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GDntGTE~sk
*/ Q)8t;Kx
public void sort(int[] data) { r4zS,J;,
int[] temp=new int[data.length]; Kj5f:{Ur
mergeSort(data,temp,0,data.length-1); :.^rWCL2
} 1(a\$Di
2J <Z4Ap
private void mergeSort(int[] data, int[] temp, int l, int r) { mY9K)]8
int i, j, k; tx-bzLo\
int mid = (l + r) / 2; vnpX-c
if (l == r) 6.=b^6MV
return; mK4A/bsE
if ((mid - l) >= THRESHOLD) wxrT(x|
mergeSort(data, temp, l, mid); jz0\F,s
else 3~'F^=T.Y
insertSort(data, l, mid - l + 1); C I0^eaFs
if ((r - mid) > THRESHOLD) mer{Jys
mergeSort(data, temp, mid + 1, r); 2 {0VyLx
else c9 c Nlp
insertSort(data, mid + 1, r - mid); VVOt%d
R~([
for (i = l; i <= mid; i++) { \x}UjHYIc&
temp = data; XjNu|H/
} b.+\qaR
for (j = 1; j <= r - mid; j++) { FT=>haN
temp[r - j + 1] = data[j + mid]; >Fh@:M7z
} b*i+uV?
int a = temp[l]; %cL:*D4oz
int b = temp[r]; 03T.Owd
for (i = l, j = r, k = l; k <= r; k++) { p,/^x~m3a
if (a < b) { *qBZi;1
data[k] = temp[i++]; /zKuVaC
a = temp; WBIS
} else { hFv}JQJw<
data[k] = temp[j--]; Y'9deX+
b = temp[j]; CXA8V"@&b/
} 0XNb@ogo
} }z#8vE;
} |Sq>uC)
o6oYJ`PY
/** xl$ Qw'
* @param data mLO6`]p{H
* @param l I(SE)%!%S
* @param i C'#:}]@E
*/ b;vO`
private void insertSort(int[] data, int start, int len) { 2_C.-;!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vP!gLN]TV
} &XP 0
} _JS'~JO3{
} CDhk!O..
} '(}BfDP
q!4dK4`#5
堆排序： 4m:E:zVn
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package org.rut.util.algorithm.support; Nnw iH
*0@e_h
import org.rut.util.algorithm.SortUtil; v*pVcBY>
DWG}}vN:&
/** 4kiu*T
* @author treeroot rcOmpgew
* @since 2006-2-2 z; +x`i.
* @version 1.0 9TLP(
*/ OB%y'mo7]
public class HeapSort implements SortUtil.Sort{ 4Bz~_
_kSus
/* (non-Javadoc) UT-=5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o9CB ,c7]
*/ |8"HTBb\CW
public void sort(int[] data) { {sLh=iK
MaxHeap h=new MaxHeap(); BshS@"8r
h.init(data); 4Hw8w7us:
for(int i=0;i h.remove(); %/7`G-a.B
System.arraycopy(h.queue,1,data,0,data.length); j,Y=GjfGM
} 9ccEF6o0=
SFHa(JOS
private static class MaxHeap{ btOC\bUMfD
?^5x d1>E
void init(int[] data){ 01J.XfCd6
this.queue=new int[data.length+1]; *-7O| ''
for(int i=0;i queue[++size]=data; Kxq~,g=t
fixUp(size); fqi584
} @m6E*2Gg
} Z`D#L[z$
TUT>*
private int size=0; }.#C9<"}
q(C+D%xB
private int[] queue; iMSS8J
=8]'/b
public int get() { x|Dj
return queue[1]; nxG vh4'i8
} g)zy^aDf
q8U]Hyp(`
public void remove() { z;-2xD0&U[
SortUtil.swap(queue,1,size--); qz 'a.]{=
fixDown(1); 3KGDS9I
} u+*CpKR}
file://fixdown ;fuy}q8@7
private void fixDown(int k) { 9T\:ID=h
int j; ']V 2V)t
while ((j = k << 1) <= size) { !cfn%+0
if (j < size %26amp;%26amp; queue[j] j++; Fw|5A"9'a'
if (queue[k]>queue[j]) file://不用交换 )|:|.`H
break; W6Hiqu+
SortUtil.swap(queue,j,k); +f+\uObi:
k = j; )Aj~ xA
} F](kU#3"S
} IgVxWh#
private void fixUp(int k) { #/n\C
while (k > 1) { hHdC/mR
int j = k >> 1; J &c}z4
if (queue[j]>queue[k]) r8mE
break; Es?~Dd
SortUtil.swap(queue,j,k); PS>k67sI
k = j; lGxG$0`;;
} s3q65%D
} VBOq~>V6(v
L%!jj7,9-
} ^CX~>j\(
9khD7v
} ;yH/GN#O
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SortUtil： I` /'\cU9
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package org.rut.util.algorithm; $Cte$jg{;
7[Y<5T]
import org.rut.util.algorithm.support.BubbleSort; %hY+%^k.
import org.rut.util.algorithm.support.HeapSort; tL D.e
import org.rut.util.algorithm.support.ImprovedMergeSort; +&|WC2#
import org.rut.util.algorithm.support.ImprovedQuickSort; +.{_n(kU
import org.rut.util.algorithm.support.InsertSort; Ip|7JL0Z
import org.rut.util.algorithm.support.MergeSort; (eHvp
import org.rut.util.algorithm.support.QuickSort; B\9ymhx;g%
import org.rut.util.algorithm.support.SelectionSort; v]c1|?9p'
import org.rut.util.algorithm.support.ShellSort; 9MVW~V
(1*?2u*j
/** A\gj\&B0"
* @author treeroot (m})V0/`
* @since 2006-2-2 bc%7-%
* @version 1.0 @r'8<6hVO
*/ 8z\WyDz
public class SortUtil { e%#9|/uP
public final static int INSERT = 1; _<&IpT{w+
public final static int BUBBLE = 2; (V}DPA
public final static int SELECTION = 3; Qr$uFh/y
public final static int SHELL = 4; {}[S,L
public final static int QUICK = 5; ^2XoYgv
public final static int IMPROVED_QUICK = 6; ,:j^EDCsaJ
public final static int MERGE = 7; [p|-G*=00
public final static int IMPROVED_MERGE = 8; 27}k63\
public final static int HEAP = 9; %/jmQ6z^
-&y{8<bu4H
public static void sort(int[] data) { {^5r5GB=*
sort(data, IMPROVED_QUICK); |v:8^C7
} 2 ES .)pQ
private static String[] name={ n"$D/XJO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,@8>=rT
}; f?[IwA`
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private static Sort[] impl=new Sort[]{ E:L =>}
new InsertSort(), t :sKvJ
new BubbleSort(), Xb5n;=)
new SelectionSort(), >?'cZTNk]
new ShellSort(), j8YMod=
new QuickSort(), fo^M`a!va0
new ImprovedQuickSort(), rer=o S
new MergeSort(), @?f3(Gh,
new ImprovedMergeSort(), ?&j[Rj0pH
new HeapSort() 8it|yK.G@&
}; qJKD|=_
/!uxP~2U
public static String toString(int algorithm){ lmgMR|v
return name[algorithm-1]; _\1wLcFj
} [wi "
JY~s-jxa
public static void sort(int[] data, int algorithm) { *4dA(N\k"
impl[algorithm-1].sort(data); SzMh}xDh2
} @I_A\ U{
2(Vm0E
public static interface Sort { :DCj2"
public void sort(int[] data); m&EwX ^1-
} 1.]#FJe
j"7 z
public static void swap(int[] data, int i, int j) { ZOi8)Y~
int temp = data; ,0[bzk
data = data[j]; 3#j%F
data[j] = temp; X)$3sTj
} ,yNPD}@v>
} {|O8)bW'