[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; LIcc0w3
} [LnPV2@e
int i1=l; Vn^GJ'^
int i2=mid+1; A7X a
for(int cur=l;cur<=r;cur++){ X,v.1#[
if(i1==mid+1) U.<j2Kum
data[cur]=temp[i2++]; S/`#6
else if(i2>r) ez'NHodwk2
data[cur]=temp[i1++]; MV"n{1B
else if(temp[i1] data[cur]=temp[i1++]; s?EQ
else ynIC (t
data[cur]=temp[i2++]; uB I/3aQ
} @njNP^'Kx
} "u^Erj# /
Nu"v .]Y2
} |eu8;~A
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改进后的归并排序: oVpZR$
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package org.rut.util.algorithm.support; G]ek-[-
j?N<40z
import org.rut.util.algorithm.SortUtil; Mr)t>4
h=A
/** "bhK%N;
* @author treeroot Nnh\FaI
* @since 2006-2-2 NuQ!huh
* @version 1.0 ev$:7}h=
*/ F\DiT|?}
public class ImprovedMergeSort implements SortUtil.Sort { VP#KoX85
C.S BJ
private static final int THRESHOLD = 10; MI`qzC*%
w6V/Xp][U
/* ;|Mfq`s
* (non-Javadoc) WA(x]""
* y47N(;vy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \V$qAfP)
*/ \AwkK3
public void sort(int[] data) { \}jA1oy
int[] temp=new int[data.length]; 3*h"B$g!
mergeSort(data,temp,0,data.length-1); lJdBUoO
} (fF8)4l
]:gW+6w"C
private void mergeSort(int[] data, int[] temp, int l, int r) { R0RxcBtG
int i, j, k; ]<^2B?}
int mid = (l + r) / 2; <r#FI8P;X
if (l == r) _2jL]mB
return; PB@IPnB-
if ((mid - l) >= THRESHOLD) VgNB^w
mergeSort(data, temp, l, mid); L/ 7AGR|;C
else @ual+=L
insertSort(data, l, mid - l + 1); w7@`:W
if ((r - mid) > THRESHOLD) MrR`jXz
mergeSort(data, temp, mid + 1, r); B.; qvuM~
else H'k}/<%Q
insertSort(data, mid + 1, r - mid); %hSQ\T<8[o
j,j|'7J%
for (i = l; i <= mid; i++) { "TA0--6
temp = data; LaQ7A,]
} =%m{|HQ`
for (j = 1; j <= r - mid; j++) { J#$U<`j*G
temp[r - j + 1] = data[j + mid]; ^bv^&V&IB
} q-`&C
int a = temp[l]; SZKYq8ZA)V
int b = temp[r]; ~,}|~
for (i = l, j = r, k = l; k <= r; k++) { lbAhP+B
if (a < b) { Fx:38Ae
data[k] = temp[i++]; >%tG[jb
a = temp; |SOLC
} else { }MQ:n8
data[k] = temp[j--]; e\V -L_
b = temp[j]; 2Xe1qzvo
} BH0m[9nU;
} 76tn`4NIP
} eUy*0
&[[r|
/** Nm"P8/-09
* @param data NBPP?\1
* @param l !i"zM}
* @param i $9`#p/V
*/ uHKEt[PS$
private void insertSort(int[] data, int start, int len) { *a Z1 4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 76!LMNf
} :i<*~0r<
} JdS,s5Z>
} R;!,(l
} !mxH/{+|n
BEOPZ[Q|c
堆排序： hWy@?r.
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package org.rut.util.algorithm.support; iAz0 A
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import org.rut.util.algorithm.SortUtil; N6._Jb
N0p6xg~
/** a^%)6E.[,
* @author treeroot p3A9<g
* @since 2006-2-2 LFax$CZc
* @version 1.0 VO0:4{-
*/ J9[7AiEd(/
public class HeapSort implements SortUtil.Sort{ ;].X;Ky<
{5Bj*m5
/* (non-Javadoc) q}t]lD %C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @:?[R&`
*/ d^=)n-!T
public void sort(int[] data) { tu}!:5xi
MaxHeap h=new MaxHeap(); xE8?%N U
h.init(data); *\XOQWrF
for(int i=0;i h.remove(); I;w!
System.arraycopy(h.queue,1,data,0,data.length); B$g\;$G
} -FJ3;fP&
8m{e,o2.
private static class MaxHeap{ ;}E}N:A
NF&Sv
void init(int[] data){ A`uHZCwJ5
this.queue=new int[data.length+1]; r &.~ {
for(int i=0;i queue[++size]=data; JN/=x2n.
fixUp(size); UfX~GC;B
} zcP=+Y)YA
} c]uieig0~
UDJjw
private int size=0; S($/Ov
%C/p+Tg
private int[] queue; #%[;vK
Fl_}Auj{&(
public int get() { fn,n'E]
return queue[1]; \x-2qlZ
} RHFRN&RU$
H0s*Lb
public void remove() { %'1iT!g8
SortUtil.swap(queue,1,size--); KVOV<uDCj
fixDown(1); m#UQ,EM
} Pdf-2 Tx
file://fixdown ~LuGfPO^
private void fixDown(int k) { 4J5zSTw
int j; o4" [{LyT
while ((j = k << 1) <= size) { 1L!;lP2
if (j < size %26amp;%26amp; queue[j] j++; !MKecRG_
if (queue[k]>queue[j]) file://不用交换 )J[m>tyY5
break; Z9DfwWI2nu
SortUtil.swap(queue,j,k); N)"8CvQL
k = j; [_JdV(]$
} vi}16V84l
} Ca'BE#q
private void fixUp(int k) { 44u)F@)
while (k > 1) { Yk|6?e{+)
int j = k >> 1; +g g_C'"
if (queue[j]>queue[k]) !CU-5bpu
break; DU\ytD`u
SortUtil.swap(queue,j,k); YIRe__7-NU
k = j; n}UJ-\$
} q=W.82.U
} _p6r5Y
5.\p]>|G1
} mS'Ad<
fM ID}S
} zb{79Os[B
A M[f
SortUtil： zd[k|lj
C>Hdp_Lm
package org.rut.util.algorithm; 2OJlE) .
v;\cM/&5
import org.rut.util.algorithm.support.BubbleSort; BI?, 3
import org.rut.util.algorithm.support.HeapSort; 59zWB,y(P
import org.rut.util.algorithm.support.ImprovedMergeSort; a=}1`Q
import org.rut.util.algorithm.support.ImprovedQuickSort; uLzE'ZmV
import org.rut.util.algorithm.support.InsertSort; >UCg3uFj
import org.rut.util.algorithm.support.MergeSort; TnN ythwZ
import org.rut.util.algorithm.support.QuickSort; ]R""L<K%HF
import org.rut.util.algorithm.support.SelectionSort; P*!`AWn
import org.rut.util.algorithm.support.ShellSort; ^W$R{`
x6,ozun
/** :f[ w
* @author treeroot |~5cNm
* @since 2006-2-2 TBt5Nqks-
* @version 1.0 GM2}]9
*/ ![%wM Pp
public class SortUtil { c[ZrQJ
public final static int INSERT = 1; [e` |<
public final static int BUBBLE = 2; D \i]gfu8W
public final static int SELECTION = 3; <q=Zg7zB
public final static int SHELL = 4; d'96$e o~
public final static int QUICK = 5; BSMb(EnqX
public final static int IMPROVED_QUICK = 6; Led\S;pl
public final static int MERGE = 7; '!^7 *@z
public final static int IMPROVED_MERGE = 8; 2L&c91=wE
public final static int HEAP = 9; lW?}Ts~'
q7lC}'2fu
public static void sort(int[] data) { _G'ki.[S7
sort(data, IMPROVED_QUICK); 82@^vX
} ?7Cm+J
private static String[] name={ >>T7;[h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jVnTpa!A
}; PV#h_X<l%
B6dU6"
private static Sort[] impl=new Sort[]{ !-`L1D_hy
new InsertSort(), %w^*7Oi
new BubbleSort(), A{s-g>s
new SelectionSort(), t[TM\j0jW
new ShellSort(), iQ" LIeD
new QuickSort(), 3g4=as4w
new ImprovedQuickSort(), F2 B(PGa7
new MergeSort(), h|]cZMGo
new ImprovedMergeSort(), OpaRQ=
new HeapSort() :j`f%Vg~x
}; h"ZIh= j@
`R2Iw I&
public static String toString(int algorithm){ ?+EAp"{j
return name[algorithm-1]; UWO3sZpU
} /V*SI!C<f
>fYcr#i0[
public static void sort(int[] data, int algorithm) { (Huvo9
impl[algorithm-1].sort(data); ]<<,{IQ
} v'?Smd1v /
KD A8x W
public static interface Sort { M ]047W
public void sort(int[] data); 79;uHR&S
} fYPu%MN7
kS_#8I
public static void swap(int[] data, int i, int j) { 8$~oiK%fw
int temp = data; @ovaOX
data = data[j]; 7V5c`:"
data[j] = temp; eHvUgDt
} 9xbT?$^
} xy:Mb =r