[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; HY42G#^
} @<AIPla
int i1=l; '|+_~ZO*d
int i2=mid+1; mHhm~u
for(int cur=l;cur<=r;cur++){ ]A\n>Z!;
if(i1==mid+1) {!="PnB
data[cur]=temp[i2++]; %?g]{
else if(i2>r) {7;TQ?/
data[cur]=temp[i1++]; |;].~7^
else if(temp[i1] data[cur]=temp[i1++]; Lf,gS*Tg?
else 68d@By
data[cur]=temp[i2++]; kj[[78
} {wm `
} ZzE&?
oNdO@i%.q4
} I/(`<s p
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改进后的归并排序: ~7k b4[
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package org.rut.util.algorithm.support; 7,jqA"9
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import org.rut.util.algorithm.SortUtil; d`xqs,0f
65}:2l2<
/** Z,2uN!6
* @author treeroot II2oV}7?
* @since 2006-2-2 ;S%wPXj&
* @version 1.0 :r6 bw
*/ >,y QG+
public class ImprovedMergeSort implements SortUtil.Sort { c[YC}@l%a
t2E_y6
private static final int THRESHOLD = 10; c]O4l2nCL
Rbl(oj#
/* U-Iwda8v
* (non-Javadoc) J|>P,x#G
* iGp@P=;m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FkS{Z s
*/ B^OhL!*tI
public void sort(int[] data) { fGxa~Unx
int[] temp=new int[data.length]; WT0U)x( m5
mergeSort(data,temp,0,data.length-1); b :+ X3
} F |GWYw'%
w?R6$n`
private void mergeSort(int[] data, int[] temp, int l, int r) { 4f1*?HX&
int i, j, k; !nd*U}q
int mid = (l + r) / 2; RS93_F8
if (l == r) 3sL#_@+yz
return; [~;9Mi.XL
if ((mid - l) >= THRESHOLD) U@*z#T#"m
mergeSort(data, temp, l, mid); Ufk7%`
else *s/F4?*
insertSort(data, l, mid - l + 1); `zvYuKQ.}
if ((r - mid) > THRESHOLD) xo*a9H?@
mergeSort(data, temp, mid + 1, r); *L!R4;ubE
else n.T [a
insertSort(data, mid + 1, r - mid); yK{~
P--#5W;^oB
for (i = l; i <= mid; i++) { [`:$( 8
temp = data; cBAA32wf
} m3,v&Z
for (j = 1; j <= r - mid; j++) { ycH=L8
temp[r - j + 1] = data[j + mid]; y@(U6ZOyx
} K4 >d
int a = temp[l]; ?2i``-|Wa
int b = temp[r]; s5[ Cr"q7B
for (i = l, j = r, k = l; k <= r; k++) { ;+5eE`]a/L
if (a < b) { 7[K$os5al
data[k] = temp[i++]; %8v?dB;>x`
a = temp; ,,6e }o6
} else { /1^%32c
data[k] = temp[j--]; APF-*/K?
b = temp[j]; 1ptPey
} Z)ObFJMG5
} N#UyAm<9
} S |B7HS5
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/** LsLsSV
* @param data jKtbGVZ7r
* @param l HWc=.Qq
* @param i i JQS@2=A
*/ :0]KIybt
private void insertSort(int[] data, int start, int len) { X2EC+<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &<~`?-c
} jfI|( P
} toP7b
} R[9[lQ'vR
} 5` Q#2
}96^OQPE
堆排序： Q2+e`
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package org.rut.util.algorithm.support; Er%nSH^"
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import org.rut.util.algorithm.SortUtil; tW 9vo-{+
jirxzj
/** d#A.A<p*
* @author treeroot m. XLpD
* @since 2006-2-2 Xp%JPI {
* @version 1.0 D VC};
*/ uu'~[SZlL
public class HeapSort implements SortUtil.Sort{ n}YRE`>D
r% qgLP{v
/* (non-Javadoc) }PoB`H'K5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G"C'/
*/ o8Tt|Lxb$8
public void sort(int[] data) { .)Du ;
MaxHeap h=new MaxHeap(); 0Pbv7)=XL
h.init(data); 2o6%P}C
for(int i=0;i h.remove(); LB-4/G$
System.arraycopy(h.queue,1,data,0,data.length); yQh":"$k
} VJm).>E3k
uN'e~X6
private static class MaxHeap{ KecRjon~
8*lVO2
void init(int[] data){ 'w&,3@Z
this.queue=new int[data.length+1]; yV_aza
for(int i=0;i queue[++size]=data; qL]!/}
fixUp(size); {wK98>$a
} {&m^*YN/
} rZ *}jD[
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private int size=0; t}]=5)9<
'(~+ \
private int[] queue; r IY_1
p'!cGJL
public int get() { qWy(f|:hYi
return queue[1]; (Y:5u}*Y
} cbNrto9
<Knl6$B
public void remove() { PjDYdT[
SortUtil.swap(queue,1,size--); h>q&X4-
fixDown(1); }c$Zlb
} XZ}]H_, n
file://fixdown Q.@9"&)t
private void fixDown(int k) { YG$Y4h" @"
int j; 7]62=p2R
while ((j = k << 1) <= size) { ]w"r4HlCx
if (j < size %26amp;%26amp; queue[j] j++; [Jwo,?w
if (queue[k]>queue[j]) file://不用交换 '4ftclzL
break; j$,:cN
SortUtil.swap(queue,j,k); Qv|A^%Ub!
k = j; R8sj>.I9j
} KHI-m9(
} 4uwI=UUB
private void fixUp(int k) { DFcgUEq
while (k > 1) { EH=[!iW;
int j = k >> 1; X6kCYTJYF
if (queue[j]>queue[k]) 4Un(}P'
break; I& DEF*
SortUtil.swap(queue,j,k); 9-5H~<}fF
k = j; 4v_<<l
} FxW~Co
} 3)3?/y)_
~ep-XO
} uD}Q}]Z
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} i^f*Em1
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SortUtil： N8#wQ*MM>
fp^{612O?
package org.rut.util.algorithm; At@H
&s-iie$"@x
import org.rut.util.algorithm.support.BubbleSort; Cjc>0)f&.
import org.rut.util.algorithm.support.HeapSort; GHWi,' mr
import org.rut.util.algorithm.support.ImprovedMergeSort; ibAZ=RD
import org.rut.util.algorithm.support.ImprovedQuickSort; *eK\W00
import org.rut.util.algorithm.support.InsertSort; "wy|gnQJ
import org.rut.util.algorithm.support.MergeSort; MAb*4e#
import org.rut.util.algorithm.support.QuickSort; x-1RmL_%
import org.rut.util.algorithm.support.SelectionSort; qr~P$
import org.rut.util.algorithm.support.ShellSort; Jz<-B
98'/yZ
/** g0O~5.f
* @author treeroot B]iPixA6
* @since 2006-2-2 piULIZ0
* @version 1.0 n@[_lNa4GD
*/ Se{x-vn?p
public class SortUtil { z@Pv~"
public final static int INSERT = 1; l|RBO+}
public final static int BUBBLE = 2; KPHtD4
public final static int SELECTION = 3; K2|2Ks_CS
public final static int SHELL = 4; |Tv}leJF
public final static int QUICK = 5; lY -2e>
public final static int IMPROVED_QUICK = 6; 3dheT}XV?p
public final static int MERGE = 7; UTwXN |'|
public final static int IMPROVED_MERGE = 8; t/%{R.1MN
public final static int HEAP = 9; ,a 2(h
<;kcy :s
public static void sort(int[] data) { Sqn|
sort(data, IMPROVED_QUICK); /<C}v~r
} B8.a#@R
private static String[] name={ &YpViC4K.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &rs
}; ( f]@lNmx
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private static Sort[] impl=new Sort[]{ }$%j}F{
new InsertSort(), BA(erf>
new BubbleSort(), #!?jxfsFa
new SelectionSort(), ,=>Ws:j
new ShellSort(), Z mVw5G q
new QuickSort(), ad)jw:n
new ImprovedQuickSort(), /]pJ(FFC
new MergeSort(), xbqFek$/r
new ImprovedMergeSort(), J,(@1R]KF:
new HeapSort() *yl?M<28
}; #z6[8B
G`D rY;
public static String toString(int algorithm){ x%_VzqR`
return name[algorithm-1]; = y@*vl
} RG&t0%yj}
]w,:T/Z}
public static void sort(int[] data, int algorithm) { !WSY75
impl[algorithm-1].sort(data); *Ri\7CqU"6
} 1aAY7Dm_&
I%(YR"
public static interface Sort { ^Y%'"QwJS
public void sort(int[] data); :Oiz|b(
} ml,FBBGq|-
u}r>?/V!
public static void swap(int[] data, int i, int j) { ]y0bgKTK
int temp = data; epN!+(v
data = data[j]; JkShtLEr
data[j] = temp; 2NMg+Lt8v
} / <C{$Gu
} IN8G4\r