[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; vZoaT|3 G]
} eGHaY4|
int i1=l; }>X~
int i2=mid+1; O1mKe%'|
for(int cur=l;cur<=r;cur++){ VAu&@a`
if(i1==mid+1) xZv#Es%#
data[cur]=temp[i2++]; ?3xzd P
else if(i2>r) jalg5`PU0
data[cur]=temp[i1++]; @|%2f@h
else if(temp[i1] data[cur]=temp[i1++]; t`mV\)fa
else Wiu"k%Qsh
data[cur]=temp[i2++]; U`m54f@U
} (J!+(H8
} Z)aUt Srf
&9)\wnOS
} Ez=Olbk
# 4PVVu<
改进后的归并排序: ZJ[ ??=Gz
d<N:[Y\4l
package org.rut.util.algorithm.support; aAAU{EWW
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import org.rut.util.algorithm.SortUtil; Z/;aT -N
Nu7 !8[?r*
/** w*JGUk
* @author treeroot ^]-6u:J!
* @since 2006-2-2 cjIh}:|'
* @version 1.0 {,~3.5u
*/ 6f*CvW
public class ImprovedMergeSort implements SortUtil.Sort { & 9 ?\b7
ilx)*Y
private static final int THRESHOLD = 10; w G<yBI0
KMjhZap%
/* R!N%o~C2-
* (non-Javadoc) \)?HJ
* l2P=R)@{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]`+HO=0
*/ hFl^\$Re
public void sort(int[] data) { 2V;PYI
int[] temp=new int[data.length]; MFAH%Z$
mergeSort(data,temp,0,data.length-1); =zKM=qba
} %n:k#
kq,ucU%>p
private void mergeSort(int[] data, int[] temp, int l, int r) { e&aWq@D
int i, j, k; QW(Mz Hg
int mid = (l + r) / 2; }@+:\
if (l == r) ~1vDV>dpE
return; C&rkvM8
if ((mid - l) >= THRESHOLD) O+Y6N
mergeSort(data, temp, l, mid); xx%j.zDI]
else c|@bwat4
insertSort(data, l, mid - l + 1); lv+TD!b
if ((r - mid) > THRESHOLD) psMvq@>
mergeSort(data, temp, mid + 1, r); *6DB0X_-}
else g~A`N=r;h
insertSort(data, mid + 1, r - mid); -:y,N 9^
"mvt>X
for (i = l; i <= mid; i++) { .+A+|yR
temp = data; 1F&Trqq
} [}0haTYc4
for (j = 1; j <= r - mid; j++) { Q|?L*Pq2I
temp[r - j + 1] = data[j + mid]; 76h ,]xi
} =mp;.k95
int a = temp[l]; zsyIV!(
int b = temp[r]; #KexvP&*
for (i = l, j = r, k = l; k <= r; k++) { orMwAV
if (a < b) { aH/ k Ua
data[k] = temp[i++]; k5.Lna
a = temp; 'op|B@y
} else { ;P%1j|7
data[k] = temp[j--]; [;),\\u,d
b = temp[j]; O5nD+qTQ#
} .MoU1n{Yc
} RO/FF<f
} GH:jH]u!V
G^4hd i3@
/** '^~{@~ ;%L
* @param data 65$+{s
* @param l nwRc%C``UK
* @param i *kDCliL
*/ 2?ez,*-[
private void insertSort(int[] data, int start, int len) { ]{mPh\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >rKIG~P_
} YvyNHW&
} mQ26K~
} =Qj{T
} +V046goX W
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堆排序： |AU~_{H
hVAn>_(
package org.rut.util.algorithm.support; RF53Jyt
tq6!`L}3
import org.rut.util.algorithm.SortUtil; _ y8Wn}19f
o5uph=Q{
/** peuZ&yK+"
* @author treeroot jc[Y}gd,
* @since 2006-2-2 O$j7i:G'5
* @version 1.0 '3DXPR^B6
*/ F {4bo$~>
public class HeapSort implements SortUtil.Sort{ PB`Y g
xvl#w
/* (non-Javadoc) x'>9d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4`]^@"{
*/ ,|H `e^
public void sort(int[] data) { }1i`6`y1
MaxHeap h=new MaxHeap(); VfC<WVYiZ
h.init(data); A:N|\Mv2b
for(int i=0;i h.remove(); O6a<`]F
System.arraycopy(h.queue,1,data,0,data.length); _w+:Dv~*a
} ?u=Fj_N_
j8{i#;s!"
private static class MaxHeap{ qqr?!vem6
f:|1_j
void init(int[] data){ 6J6BF%
this.queue=new int[data.length+1]; .A{tQ1&_
for(int i=0;i queue[++size]=data; Ed,~1GanY
fixUp(size); hl(hJfp
} 1&evG-#<:
} sRL`dEl4l
>xYpNtEs
private int size=0; 9gEwh<
C>j@,G4
private int[] queue; J0\Fhe0'
uHvp;]/0\
public int get() { lC("y' ::
return queue[1]; a85$K$b>
} xU>WEm2
a#y;dK
public void remove() { l%puHZ)t
SortUtil.swap(queue,1,size--); 5Y'qaIFR
fixDown(1); n:\~'+$
} xH(lm2kvT
file://fixdown ?2;&O`x*
private void fixDown(int k) { *,8^@(th
int j; R_ ,UMt
while ((j = k << 1) <= size) { M!A}NWF
if (j < size %26amp;%26amp; queue[j] j++; mPN@{.(j
if (queue[k]>queue[j]) file://不用交换 >WQMqQ^t@
break; ;I 9&]
SortUtil.swap(queue,j,k); 6YLj^w] %
k = j; )72+\C[*~r
} YY((V@|K
} nE&@Q
private void fixUp(int k) { >:S?Mnv6
while (k > 1) { ZaDyg"Tw+
int j = k >> 1; # 448-8x
if (queue[j]>queue[k]) C]eSizS.
break; '}JhzKNj
SortUtil.swap(queue,j,k); k_qd|
k = j; qL&[K>2z
} EC6DW=
} DV+xg3\(>1
ox>^>wR*
} .TMs bZ|j
^aMg/.j
} 5uNJx5g
4 \K7xM!
SortUtil： S)k*?dQ##R
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package org.rut.util.algorithm; gsvuE
" 4K(jXq|
import org.rut.util.algorithm.support.BubbleSort; goRL1L,5
import org.rut.util.algorithm.support.HeapSort; f/NH:1)y
import org.rut.util.algorithm.support.ImprovedMergeSort; |`Ntv}
import org.rut.util.algorithm.support.ImprovedQuickSort; |`f$tj
import org.rut.util.algorithm.support.InsertSort; }~jlj
import org.rut.util.algorithm.support.MergeSort; 1N^[.=
import org.rut.util.algorithm.support.QuickSort; ^f &XQQY
import org.rut.util.algorithm.support.SelectionSort; ICoHI
import org.rut.util.algorithm.support.ShellSort; .hP D$o
|vwVghC
/** 2d(e:rh]
* @author treeroot wd^':
* @since 2006-2-2 ;%5N%0,
* @version 1.0 YTpSHpf@
*/ )uIe&B
public class SortUtil { ?)?Ng}
public final static int INSERT = 1; V _/%b)*
public final static int BUBBLE = 2; e*(!^Q1
public final static int SELECTION = 3; }DEg-j,F
public final static int SHELL = 4; 0hNA1Fh{U
public final static int QUICK = 5; Gg3,:A_ w
public final static int IMPROVED_QUICK = 6; g^2OkV(
public final static int MERGE = 7; .E1rqBG
public final static int IMPROVED_MERGE = 8; <#y[gTJ<'>
public final static int HEAP = 9; 88gM?G _X
BB$>h}
public static void sort(int[] data) { [0[i5'K:
sort(data, IMPROVED_QUICK); k>Vci{v
} kr5">"7
private static String[] name={ VimE@Hz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" He/8=$c%
}; qu6D 5t
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private static Sort[] impl=new Sort[]{ '!cCMTj
new InsertSort(), (KD RkE|=
new BubbleSort(), ksqQM
new SelectionSort(), 6V:U(g
new ShellSort(), HTcb_a
new QuickSort(), 2K6qY)/_
new ImprovedQuickSort(), #7$ H
new MergeSort(), /-qNh>v4
new ImprovedMergeSort(), :&rt)/I
new HeapSort() k&q;JyUi
}; <QAFL uey
V-2(?auZd
public static String toString(int algorithm){ v0+BkfU+p
return name[algorithm-1]; 4qh?,^Dq
} \0I_<
,RI Gc US
public static void sort(int[] data, int algorithm) { Y>T-af49
impl[algorithm-1].sort(data); 8f4b&ah
} 4Zddw0|2
LTCb@L{^i
public static interface Sort { #s(BuVU
public void sort(int[] data); T_ <@..C
} S9D<8j^
#PW9:_BE
public static void swap(int[] data, int i, int j) { oUr66a/[U
int temp = data; 9@:2wR |
data = data[j]; Jk11fn;\>
data[j] = temp; kGS;sB
} qu@~g cE
} rjAn@!|:+