[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; Hhknjx
} A)U"F&tvm
int i1=l; +YvF+E
int i2=mid+1; #tV1?q
for(int cur=l;cur<=r;cur++){ LSC[S:
if(i1==mid+1) Gn2{C%
data[cur]=temp[i2++]; ga +, P
else if(i2>r) ]d1'5F][H
data[cur]=temp[i1++]; 95,]86
else if(temp[i1] data[cur]=temp[i1++]; V#ELn[k
else &Gt{9#
data[cur]=temp[i2++]; 5&n:i,
} uRb48Qy2
} => (g_\
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} (l99a&]t
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改进后的归并排序: ps<Ef
@6"MhF
package org.rut.util.algorithm.support; tNY;wl:wp
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import org.rut.util.algorithm.SortUtil; fJ*^4
.+9*5
/** .:?v;rYk{
* @author treeroot E>_Rsw *
* @since 2006-2-2 4~}NB%,
* @version 1.0 ZD&F ,2v
*/ $V87=_}
public class ImprovedMergeSort implements SortUtil.Sort { O!"K'Bm
:tZsSK
private static final int THRESHOLD = 10; dUv@u!}B
J,W$\V]p
/* $+WXM$N
* (non-Javadoc) X;!*D
* s&E,$|80
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }uIQ@f`
*/ ZjxF@`H
public void sort(int[] data) { jemb/:E
int[] temp=new int[data.length]; N*A*\B%{x'
mergeSort(data,temp,0,data.length-1); Iy_5k8]
} AZ!/{1Az
uj3`M9
private void mergeSort(int[] data, int[] temp, int l, int r) { #2^0z`-\_z
int i, j, k; F${sEtH
int mid = (l + r) / 2; Qf_N,Bq{a
if (l == r) |mH* I
return; ya2sS9^T[
if ((mid - l) >= THRESHOLD) 4XAB_Q
mergeSort(data, temp, l, mid); `/WxEu3
else C|]c#X2t3
insertSort(data, l, mid - l + 1); VrW]|jIu*
if ((r - mid) > THRESHOLD) ]|3hK/
mergeSort(data, temp, mid + 1, r); Cj>HMB}
else Zz} o t
insertSort(data, mid + 1, r - mid); PY.HZ/#d
Kl.*Q
for (i = l; i <= mid; i++) { G `|7NL
temp = data; __}SHU0R
} r^Ra`:ca
for (j = 1; j <= r - mid; j++) { ft/k-64
temp[r - j + 1] = data[j + mid]; \IQG%L{
} I;@q`Tm
int a = temp[l]; tpSgbGzp
int b = temp[r]; 9Buss+K?/h
for (i = l, j = r, k = l; k <= r; k++) { ]2-Qj)mZ]
if (a < b) { 5 SQ!^1R 9
data[k] = temp[i++]; 0gqV>:
a = temp; sO) H#G
} else { |}d^lQ9
data[k] = temp[j--]; +^9^)Ur|
b = temp[j]; 9po=[{Bp
} L!JC)p.
} Pjh;;k|V
} BZ\="N#f
KOg,V_(I
/** ]ttF''lH
* @param data vL_yM
* @param l "vk]y
* @param i %scw]oF
*/ B6F!"
private void insertSort(int[] data, int start, int len) { 551_;,t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2}<tzDI'
} N%Bl+7,q
} fOMaTnm'
} h_t`)]-
} 3fLdceT
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堆排序： Y9mhDznS
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package org.rut.util.algorithm.support; HxK'u4I
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import org.rut.util.algorithm.SortUtil; \2u7>fU!
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/** Pac ^=|h<q
* @author treeroot h HHR]e5:
* @since 2006-2-2 ,%Z&*/*Oh
* @version 1.0 G>pedE\
*/ 5!ngM
public class HeapSort implements SortUtil.Sort{ ;r2DQg"#@
f IV"U
/* (non-Javadoc) P_b5`e0O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M"]?'TMfXc
*/ <]?71{7X
public void sort(int[] data) { HCr}|DxyK
MaxHeap h=new MaxHeap(); Ip{hg,>
h.init(data); #N3*SE
for(int i=0;i h.remove(); MNU7OX<
System.arraycopy(h.queue,1,data,0,data.length); F$>#P7ph\a
} P[aE3Felk
'[6]W)f
private static class MaxHeap{ :&5u)
BUZ74
void init(int[] data){ ~7aD#`amU
this.queue=new int[data.length+1]; )Fd)YJVR
for(int i=0;i queue[++size]=data; ]pNM~,
fixUp(size); oBmv^=cH
} mmwc'-jU:
} idBdaZg
njd2
private int size=0; 1f3g5y'z5
R;AcAJ;
private int[] queue; euY+jc%
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public int get() { fBTNI`#
return queue[1]; Nj4r[5K
} "LYhYkI
=?L16mu1&
public void remove() { )%/ Ni^
SortUtil.swap(queue,1,size--); oTk\r$4eb
fixDown(1); f`vWCb
} vy [7I8f{
file://fixdown c-zW 2;|61
private void fixDown(int k) { jB -Ad8
int j; D7R;IA-w
while ((j = k << 1) <= size) { 0<A*I{,4L
if (j < size %26amp;%26amp; queue[j] j++; fC"?r6d
if (queue[k]>queue[j]) file://不用交换 <> HI(6\@Z
break; D0\*WK$
SortUtil.swap(queue,j,k); 7.{+8#~nV
k = j; zKk=R6w
} _0[s]
} QBmARQ
private void fixUp(int k) { kK/>,Eg
while (k > 1) { 0dx%b677d
int j = k >> 1; p8]XNe
if (queue[j]>queue[k]) W;Dik%^tg
break; z__{6"^
SortUtil.swap(queue,j,k); O 8l`1
k = j; Y)8 Py1}
} Fbotn(\h@
} %N\45nYU:
!*^+7M
} e}gGl<((g
(CDh,ZN;|
} REc90v2"
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SortUtil： Gf7r!Ur;g
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package org.rut.util.algorithm; 0<-A2O),
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import org.rut.util.algorithm.support.BubbleSort; 9-#=xE9'U
import org.rut.util.algorithm.support.HeapSort; ty;a!yjC
import org.rut.util.algorithm.support.ImprovedMergeSort; !K.)Qr9V
import org.rut.util.algorithm.support.ImprovedQuickSort; @B)5Ho
import org.rut.util.algorithm.support.InsertSort; v*y,PY1*
import org.rut.util.algorithm.support.MergeSort; 6X2w)cO
import org.rut.util.algorithm.support.QuickSort; 9;gy38.3
import org.rut.util.algorithm.support.SelectionSort; 5[6{o$I
import org.rut.util.algorithm.support.ShellSort; 4M$"0}O;[h
^~B#r#
/** WYvcN8F
* @author treeroot (=%0x"'
* @since 2006-2-2 s7`2ky()kz
* @version 1.0 _B&;z $
*/ rJ4A9d3:
public class SortUtil { mst;q@
public final static int INSERT = 1; )CH\]>-FO
public final static int BUBBLE = 2; aE]RVyG@L
public final static int SELECTION = 3; j%S} T)pX
public final static int SHELL = 4; !{r@ H+Kf
public final static int QUICK = 5; 'cN3Vvk
public final static int IMPROVED_QUICK = 6; Rs]Y/9F;{
public final static int MERGE = 7; 1b7Q-elG
public final static int IMPROVED_MERGE = 8; 06af{FXsGb
public final static int HEAP = 9; G`v(4`tA
uMFV^&ZF
public static void sort(int[] data) { BC%V<6JBu(
sort(data, IMPROVED_QUICK); 2Zq_zvKUt
} ;k1VY Ie}
private static String[] name={ #%CB`l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <7%#RJwe
}; Zh:@AFz:R
W1}d6Sbg
private static Sort[] impl=new Sort[]{ #FGj)pu
new InsertSort(), MR":aT
new BubbleSort(), [r1\FF@v,
new SelectionSort(), > W^"*B
new ShellSort(), )P W Zc?M
new QuickSort(), |'k7 ;UW
new ImprovedQuickSort(), EzU=q E
new MergeSort(), ]D>\Z(b
new ImprovedMergeSort(), x50ZwV&j
new HeapSort() +o6"Z)
}; I&&[ ':
|3EKK:RE
public static String toString(int algorithm){ s=&x%0f%
return name[algorithm-1]; !M7727
} Coe%R(x5
)k6z
public static void sort(int[] data, int algorithm) { r[nvgzv@
impl[algorithm-1].sort(data); O3L:v{Kn
} ];{CNDAL2
K{G\=yJ((
public static interface Sort { "V4ru&a
public void sort(int[] data); I(Q3YDdb
} ]EvK.ORy
F$,i_7Z&6
public static void swap(int[] data, int i, int j) { DvBRK}'
int temp = data; dJ,,yA*
data = data[j]; =W'{xG}
data[j] = temp; y(6*)~Dh
} h"$],=
} enQev?8%