[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; 'sj9[o@]
} QTVa
int i1=l; 3PsxOb+
int i2=mid+1; R=`U4Ml;
for(int cur=l;cur<=r;cur++){ 0/ut:RV0
if(i1==mid+1) QT#b>xV)1
data[cur]=temp[i2++]; y0,Ft/D
else if(i2>r) #hIEEkCp +
data[cur]=temp[i1++]; 5pO]vBT
else if(temp[i1] data[cur]=temp[i1++]; k_]\(myq
else 5B%w]n
data[cur]=temp[i2++]; GGCqtA^@7d
} F(deu^s%{
} %fHH{60
$zdd=.!KiK
} T`uDlo
wi>DZkR
改进后的归并排序: SijtTY#r
1{^CfamF
package org.rut.util.algorithm.support; [!W5}=^H
R;WW f.#
import org.rut.util.algorithm.SortUtil; Q-[3j
a;%I\w;2
/** w{3ycR
* @author treeroot u[)_^kIE(n
* @since 2006-2-2 /K f L+"^|
* @version 1.0 iBucT"d]
*/ A*hZv|$0
public class ImprovedMergeSort implements SortUtil.Sort { T-^0:@5o9
+a-D#^2;
private static final int THRESHOLD = 10; 8`}l\ Y
5\WUoSgy
/* WhH!U0
* (non-Javadoc) 0}B?sNr
* Q.yb4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k=e`*LB\
*/ &1P(O\d
public void sort(int[] data) { G(3;;F7"
int[] temp=new int[data.length]; )`^ /(YG
mergeSort(data,temp,0,data.length-1); byafb+x
} G%;kGi`m
MZ WmlJ
private void mergeSort(int[] data, int[] temp, int l, int r) { x.ba|:5
int i, j, k; z?)He)d
int mid = (l + r) / 2; /N>} 4Ay
if (l == r) {#N%Bq}
return; }B`Ku5 M
if ((mid - l) >= THRESHOLD) *,17x`1e
mergeSort(data, temp, l, mid); t ^m~
else >Co)2d]
insertSort(data, l, mid - l + 1); "CMucK
if ((r - mid) > THRESHOLD) c+8V|'4
mergeSort(data, temp, mid + 1, r); "e@n:N!
else 7{4w2)
insertSort(data, mid + 1, r - mid); YGETMIT(
H37QgApB
for (i = l; i <= mid; i++) { e gI&epN
temp = data; 19p8B&
} uxb:^d?D!
for (j = 1; j <= r - mid; j++) { :5jexz."M
temp[r - j + 1] = data[j + mid]; #BsW
} P].eAAXnP
int a = temp[l]; aZ6'|S;
int b = temp[r]; <6/= y1QC)
for (i = l, j = r, k = l; k <= r; k++) { 0'`S,
if (a < b) { Ps3~{zH`
data[k] = temp[i++]; `Ug tvo
a = temp; g8RPHjvZ
} else { W!91tzs:
data[k] = temp[j--]; uaaf9SL?
b = temp[j]; ?_%u)S*g
} ywOmQcZ
} QjJfE<h
} 9Sz7\W0
*}w+68eO
/** TdFT];:
* @param data wG8 nw;
* @param l &))\2pl
* @param i |NJ}F@t/5
*/ vQgq]mA?
private void insertSort(int[] data, int start, int len) { w^Ag]HZN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6Hk="$6K
} 8eN7VT eb
} \x(^]/@
} hO \/
} $Asr`Q1i
g5Hr7Km
堆排序： *C7F2o
R5(F)abi
package org.rut.util.algorithm.support; '#q4Bc1
bY)#v?
import org.rut.util.algorithm.SortUtil; JRY_nX
Zj!Abji=O
/** FshC )[w,
* @author treeroot 2 x32U MD
* @since 2006-2-2 _~&9*D$ {>
* @version 1.0 DZk1ZLz
*/ lL0M^Nv
public class HeapSort implements SortUtil.Sort{ m(_9<bc>
R%"K
/* (non-Javadoc) Vm,,uF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OhFW*v
*/ "(f`U.
public void sort(int[] data) { 8{ gXToK
MaxHeap h=new MaxHeap(); psUE!~9,
h.init(data); A[)C:q,
for(int i=0;i h.remove(); %j5ywr:
System.arraycopy(h.queue,1,data,0,data.length); m*Cu-6&qd
} o2naVxetE
t7*#[x)a
private static class MaxHeap{ 3{ "O,h
Ryv_1gR!
void init(int[] data){ 0` 5e
this.queue=new int[data.length+1]; u-:Ic.ZV
for(int i=0;i queue[++size]=data; 'SV7$,mK@
fixUp(size); 2hq\n<
} cP rwW6
} IZrk1fh
t,<UohL|z
private int size=0; 5JSrrpGr
x)oRSsv!Tr
private int[] queue; "@yyXS r
X{Zm9T
public int get() { J'Sm0
return queue[1]; :mZYS4L~
} Bm/YgQi
JN(-.8<
public void remove() { H M:r0_
SortUtil.swap(queue,1,size--); ,H[SI0];
fixDown(1); ^R~~L
} <[i}n55
file://fixdown ahGT4d`)9
private void fixDown(int k) { /XbW<dfl
int j; c^9tYNn
while ((j = k << 1) <= size) { *C2R`gpBI
if (j < size %26amp;%26amp; queue[j] j++; /X#z*GX
if (queue[k]>queue[j]) file://不用交换 \TbVS8e^
break; )(TAT<
SortUtil.swap(queue,j,k); 5/@UVY9_
k = j; uQ3[Jz`y
} goZ V.,w
} 6q/?-Qcy
private void fixUp(int k) { :dwt1>
while (k > 1) { ."6[:MF
int j = k >> 1; lr3mE
if (queue[j]>queue[k]) d%ME@6K)
break; nc?B6IV
SortUtil.swap(queue,j,k); lm0N5(XP
k = j; c$h9/H=~
} h"W8N+e\
} &JhX+'U
-t-tn22
} \?lz&<
5v _P Oq
} ,hRN\Kt)p
$>q@SJ1q
SortUtil： 1cC1*c0Z
c0rk<V%5+
package org.rut.util.algorithm; m9":{JI.w
D1T@R)j
import org.rut.util.algorithm.support.BubbleSort; #b)e4vwCq
import org.rut.util.algorithm.support.HeapSort; 3yO=S0`
import org.rut.util.algorithm.support.ImprovedMergeSort; KoBW}x9Jp
import org.rut.util.algorithm.support.ImprovedQuickSort; ;_+uSalt
import org.rut.util.algorithm.support.InsertSort; m_7 nz!h
import org.rut.util.algorithm.support.MergeSort; vHKlLl>*2
import org.rut.util.algorithm.support.QuickSort; <02m%rhuW
import org.rut.util.algorithm.support.SelectionSort; qJv[MBjk3B
import org.rut.util.algorithm.support.ShellSort; ] d?x$>
C9~~O~7x
/** #Dy?GB08
* @author treeroot X#p Wyo~
* @since 2006-2-2 TqAPAHg
* @version 1.0 {eT.SO
*/ I 3$dVls}
public class SortUtil { TO#Pz.)>B6
public final static int INSERT = 1; '7)"
public final static int BUBBLE = 2; (6gK4__}]
public final static int SELECTION = 3; )"<8K}%!
public final static int SHELL = 4; /X*oS&-M
public final static int QUICK = 5; zfI}Q}p
public final static int IMPROVED_QUICK = 6; =Lp7{09u
public final static int MERGE = 7; 3$/ 4wH^
public final static int IMPROVED_MERGE = 8; q3w1GD
public final static int HEAP = 9; [\e@_vY@OH
EbQa?
public static void sort(int[] data) { z\!K<d"Xv
sort(data, IMPROVED_QUICK); X[3}?,aqL
} L 3XB"A#
private static String[] name={ U5r}6D!)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ud(`V:d
}; ~mp0B9L%
svhI3"r
private static Sort[] impl=new Sort[]{ kxB.,'
new InsertSort(), gP}+wbk
new BubbleSort(), rZ03x\2
new SelectionSort(), -ysn&d\rV
new ShellSort(), 8y2+&#$
new QuickSort(), dK9Zg,DZL
new ImprovedQuickSort(), kLP0{A
new MergeSort(), UQ?%|y*Kc
new ImprovedMergeSort(), Xrqx\X
new HeapSort() A[N{
}; 6,b"
j<yiNHC
public static String toString(int algorithm){ P 7D!6q
return name[algorithm-1]; F7}-!
} _e<o7Y@_
Bi%x`4Lf
public static void sort(int[] data, int algorithm) { n6Z|Q@F
impl[algorithm-1].sort(data); YTaLjITG
} z8_XX$Mnt
y/_XgPfWU
public static interface Sort { V-yUJ#f8[
public void sort(int[] data); ?&+9WJ<M
} o^p
M[]A2'fS
public static void swap(int[] data, int i, int j) { 5"KlRuv%
int temp = data; E8[T
data = data[j]; v3[@1FQ"
data[j] = temp; TLa]O1=Bf.
} iw?I
} Tl("IhkC