[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; YJ{_%z|U
} q],/%W
int i1=l; # 66vkf*
int i2=mid+1; j1K?QH=e#{
for(int cur=l;cur<=r;cur++){ >=YQxm}GJ
if(i1==mid+1) b X4]/4%
data[cur]=temp[i2++]; lB(P+yY,/'
else if(i2>r) YzYj/,?r
data[cur]=temp[i1++]; /Y8{?
else if(temp[i1] data[cur]=temp[i1++]; }u.1$Y
else A?H.EZ
data[cur]=temp[i2++]; %:Y'+!bX
} hD,@>ky
} VL2ACv(
UQ~gjnb[c
} 3$PGLM
pXf5/u8&
改进后的归并排序: H;Gd
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package org.rut.util.algorithm.support; SOeRQb'
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import org.rut.util.algorithm.SortUtil; (5>IF,}!L
28O3N;a
/** 79Q>t%rD[
* @author treeroot \&4)['4,
* @since 2006-2-2 G`NGt_C
* @version 1.0 #.|MV}6rQ
*/ 7-c3^5gn{
public class ImprovedMergeSort implements SortUtil.Sort { X-_0wR
yTh60U
private static final int THRESHOLD = 10; +?uZ~VSl
Kbcr-89Gv~
/* O>>%lr|
* (non-Javadoc) 2x:aMWh
* 9On(b|mT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ICUI0/J
*/ I=|}%WO#
public void sort(int[] data) { H#B97IGT
int[] temp=new int[data.length]; P|;=dX#-
mergeSort(data,temp,0,data.length-1); (z^987G
} J(kC
*.zC9Y,
private void mergeSort(int[] data, int[] temp, int l, int r) { y])z,#%ED
int i, j, k; U_AmRiy
int mid = (l + r) / 2; :{x
if (l == r) o&kgRv[
return; Rs53R$PIR
if ((mid - l) >= THRESHOLD) +6\1 d5
mergeSort(data, temp, l, mid); 9`5qVM1O{
else qWw{c&{Q],
insertSort(data, l, mid - l + 1); O],]\M{GL
if ((r - mid) > THRESHOLD) 7-[^0qS
mergeSort(data, temp, mid + 1, r); Kr74|W=
else @mu=7_$U
insertSort(data, mid + 1, r - mid); D]hwG0Chd
ItwJL`
for (i = l; i <= mid; i++) { ;(;{~1~
temp = data; pF'M
} zzZK S
for (j = 1; j <= r - mid; j++) { ~4u[\&Sh
temp[r - j + 1] = data[j + mid]; 6q@VkzF
} AHdh]pfH
int a = temp[l]; z[De?8=)
int b = temp[r]; RyZy2^0<
for (i = l, j = r, k = l; k <= r; k++) { H6i;MQ
if (a < b) { ZvkBF9d
data[k] = temp[i++]; {WN??eys,
a = temp; wj|[a,(r
} else { >UBozmF=\
data[k] = temp[j--]; at5=Zo[bP
b = temp[j]; );*#s~R
} P: )YKro]
} 3L-}B#tI
} P{o//M
I]0 D*z
/** Ugv"A;l
* @param data Lb%:u5X\D@
* @param l W3Dtt-)E
* @param i DeGcS1_?
*/ hV[=
private void insertSort(int[] data, int start, int len) { _sC kBDl-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "oo j;
} 5)<}a&;{
} uDsof?z
} lwp(Pq
} 8eZ^)9m
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堆排序： 1|3{.Ed
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package org.rut.util.algorithm.support; KU)~p"0[6]
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import org.rut.util.algorithm.SortUtil; *N3X"2X:
Xjnv8{X
/** _U`1BmTC2
* @author treeroot UeN+}`!l
* @since 2006-2-2 ljw>[wNv
* @version 1.0 GB` G(a
*/ av4g/7=
public class HeapSort implements SortUtil.Sort{ ip2BvN&
{igVuZ(>en
/* (non-Javadoc) Evb %<`gd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qn#f:xltu
*/ l]KxUkA+
public void sort(int[] data) { -`} d@x
MaxHeap h=new MaxHeap(); Kf'oXCs
h.init(data); J?84WS
for(int i=0;i h.remove(); `HJRXoLySW
System.arraycopy(h.queue,1,data,0,data.length); 9zD^4j7
} Sz'JOBp
ad'C&^o5
private static class MaxHeap{ TaE&8;H#N
~t.M!vk
void init(int[] data){ 7&{[Y^R]"
this.queue=new int[data.length+1]; D+69U[P_A
for(int i=0;i queue[++size]=data; 8^av&u$
fixUp(size); ~91) DNaE
} 6xAR:
} B3-;]6
DXc3u^ L
private int size=0; dMjAG7U
qo62!q
private int[] queue; M_EXA _
g=_@j`
public int get() { >Mc,c(CvU
return queue[1]; Pq)C(Z
} d6;"zW|Ec
>Sua:Uff
public void remove() { D}6~2j
SortUtil.swap(queue,1,size--); CiTjRJ-ZW)
fixDown(1); pv){R;f
} w8>
file://fixdown t&L+]I'P3
private void fixDown(int k) { )H`1CcT
int j; x,>r}I>^Q
while ((j = k << 1) <= size) { cuW&X9\m,
if (j < size %26amp;%26amp; queue[j] j++; P*zOt]T
if (queue[k]>queue[j]) file://不用交换 X!ad~bt
break; 92)e/t iP
SortUtil.swap(queue,j,k); @?\[M9yK
k = j; =}7[ypQM`]
} @h";gN
} Zm~oV?6
private void fixUp(int k) { Ht!]%
while (k > 1) { S1oP_A[|
int j = k >> 1; K`#bLCXEV0
if (queue[j]>queue[k]) +YK/^;Th
break; gdkQ h_\
SortUtil.swap(queue,j,k); =TG[isC/F9
k = j; ^YwTO/Q|
} <u%&@G$F>
} 5 Yf T
_"R /k`8
} A6#5 z
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} *aT\V64
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SortUtil： K,Z_lP_~Vw
3T7,Y(<V
package org.rut.util.algorithm; ;R8pVj!1f
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import org.rut.util.algorithm.support.BubbleSort; ofIw7D*h
import org.rut.util.algorithm.support.HeapSort; %an&lcoX
import org.rut.util.algorithm.support.ImprovedMergeSort; N% W298
import org.rut.util.algorithm.support.ImprovedQuickSort; Uc<j{U ,
import org.rut.util.algorithm.support.InsertSort; S eTn]
import org.rut.util.algorithm.support.MergeSort; "[t (u/e
import org.rut.util.algorithm.support.QuickSort; (c=.?{U
import org.rut.util.algorithm.support.SelectionSort; }:2GD0Ru
import org.rut.util.algorithm.support.ShellSort; rS^+y{7
"hi)p9 _cR
/** /a:sWmxMT
* @author treeroot sp'f>F2]
* @since 2006-2-2 d iGkwKj
* @version 1.0 #)hJ.0~3
*/ Bp>Z?"hTe
public class SortUtil { (viGL|Ogn
public final static int INSERT = 1; bw& U[|A0%
public final static int BUBBLE = 2; @K:TGo,%I
public final static int SELECTION = 3; Q5~Y;0'
public final static int SHELL = 4; D?:AHj%gW
public final static int QUICK = 5; ?<"H Io
public final static int IMPROVED_QUICK = 6; =@EX!]=x
public final static int MERGE = 7; (h3f$
public final static int IMPROVED_MERGE = 8; Oj? |g_
public final static int HEAP = 9; *8?0vkZZ2
J;AwC>N
public static void sort(int[] data) { Y3RaR 9
sort(data, IMPROVED_QUICK); W+&<C#1|]
} 1?}5.*j<
private static String[] name={ u|}p3-z|Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RC>79e/u<
}; G&2`c\u{
!9ytZR*
private static Sort[] impl=new Sort[]{ ub,GF?9
new InsertSort(), )ir*\<6Y=
new BubbleSort(), WQ>y;fi5/{
new SelectionSort(), U3UDA
new ShellSort(), \2Atm,#4
new QuickSort(), v@^P4cu;
new ImprovedQuickSort(), e[)oT
new MergeSort(), yRF %SWO
new ImprovedMergeSort(), {InD/l'v6n
new HeapSort() Zj]jE%AT
}; C0> Z<z
'l7ey3B%
public static String toString(int algorithm){ 4gkaCk{]
return name[algorithm-1]; U.,_zEbx,
} 6< T@\E
y/(60H,{{
public static void sort(int[] data, int algorithm) { ;VI/iwg
impl[algorithm-1].sort(data); mufJ@YS#
} `: R7jf
7I0[Ii
public static interface Sort { 4ZAnq{nR4
public void sort(int[] data); uKL4cr@
} @j/|U04_Z
.Fe_Z)i>h
public static void swap(int[] data, int i, int j) { [W#M(`}D
int temp = data; :3aZ_
data = data[j]; R$Or&:E ^
data[j] = temp; K#>@T<
} Y_SB3 $])
} }Jr!aM'