[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; (yE?)s
} ~=HN30
int i1=l; w[z^B&
int i2=mid+1; ~.M{n&NM
for(int cur=l;cur<=r;cur++){ bD<[OerG
if(i1==mid+1) 9|T%q2O
data[cur]=temp[i2++]; y3$i?}?A
else if(i2>r) :W,6zv(..u
data[cur]=temp[i1++]; M#on-[
else if(temp[i1] data[cur]=temp[i1++]; {*H&NI
else Pze$QBNoRd
data[cur]=temp[i2++]; \t'(&taX<
} < pI2}
} _3h(R`VdWO
cTmoz.0
} JwbC3t):@
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改进后的归并排序: |@={:gRJ{x
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package org.rut.util.algorithm.support; 6%NX|4_
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import org.rut.util.algorithm.SortUtil; DF'-dh</*
$b\`N2J-_
/** bL (g$Yi
* @author treeroot V'~]b~R
* @since 2006-2-2 Z{`;Ys:zk
* @version 1.0 bp2l%A;
*/ R-J\c+C>W
public class ImprovedMergeSort implements SortUtil.Sort { Nh~ Hh(
VO>A+vx3M
private static final int THRESHOLD = 10; +Y,>ftN
$<2r;'?0D
/* |c,":R
* (non-Javadoc) STs~GOm-
* QRXsLdf$$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^ng#J\
*/ zcD&xoL\H
public void sort(int[] data) { ./mh9ax
int[] temp=new int[data.length]; bT}P":*y
mergeSort(data,temp,0,data.length-1); CQ2{5
} bCg {z b#
(E59)z -
private void mergeSort(int[] data, int[] temp, int l, int r) { 7 2ux3D
int i, j, k; VYkOJAEBg
int mid = (l + r) / 2; p*F&G=ZE
if (l == r) #_y#sDfzh
return; *}Zd QJL
if ((mid - l) >= THRESHOLD) cBM A.'uIL
mergeSort(data, temp, l, mid); ),0_ C\
else 8I04Nx
insertSort(data, l, mid - l + 1); oAe]/j$
if ((r - mid) > THRESHOLD) ]K0<DO9
mergeSort(data, temp, mid + 1, r); UA/Q3)
else mv%fX2.
insertSort(data, mid + 1, r - mid); lz@fXaZM
ZO{uG(u
for (i = l; i <= mid; i++) { k_#ra7zP
temp = data; -EFtk\/
} 64>E|w
for (j = 1; j <= r - mid; j++) { jDIO,XuF
temp[r - j + 1] = data[j + mid]; |Y"q. n77
} 5b3Wt7
int a = temp[l]; FGu:8`c9
int b = temp[r]; $n& alcU
for (i = l, j = r, k = l; k <= r; k++) { Jf@M>BT^A
if (a < b) { Z+)R%Z'aL
data[k] = temp[i++]; <",4O
a = temp; 4m$nVv
} else { ,x!P|\w.G{
data[k] = temp[j--]; w-};\]I
b = temp[j]; YvE$fX=
} 2Ch!LS:+
} g !w7Yv
} LEvdPG$)
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/** mm\Jf
* @param data `o yz"07m
* @param l ct=|y(_
* @param i 7(^<Z5@
*/ G!T)V2y
private void insertSort(int[] data, int start, int len) { zg2A$Fd[j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Oyhl*`-*t
} xi8RE@gm
} E{sTxOI$
} |;ycEB1
} :XcU@m
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堆排序： #ebT$hf30
@FIR9XJ
package org.rut.util.algorithm.support; ug0[*#|Y
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import org.rut.util.algorithm.SortUtil; D`0II=
5c($3Pno=
/** q3JoU/Sf
* @author treeroot EC$wi|i
* @since 2006-2-2 p}_bu@;.Z
* @version 1.0 {^>m3
*/ JYOyz+wNd
public class HeapSort implements SortUtil.Sort{ )Yz` 6
zI8Q "b
/* (non-Javadoc) A>(m}P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *,{. oO9#
*/ ;H/*%2
public void sort(int[] data) { 2+ F34
MaxHeap h=new MaxHeap(); &^FCp'J-
h.init(data); iq-n(Rfw~
for(int i=0;i h.remove(); 2-j+-B|i
System.arraycopy(h.queue,1,data,0,data.length); ,.uu/qV}w
} RzQ1Wq
55MsF}p
private static class MaxHeap{ 8:0QIkqk
3]WIN_h
void init(int[] data){ JVf8KHDj
this.queue=new int[data.length+1]; _JOrGVmD
for(int i=0;i queue[++size]=data; aAiSP+#
fixUp(size); #P=rP=
} VI0^Zq!6R
} &G7JGar
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private int size=0; B-ReBtN
wX@&Qv
private int[] queue; [?iA`#^d
$wH{snX
public int get() { ;0O3b
return queue[1]; q]YPDdR#
} "8%B (a 5A
xOP%SF
public void remove() { gN1b?_g
SortUtil.swap(queue,1,size--); <KqZ.7XfB
fixDown(1); m]} E0
} XWV)
file://fixdown 5p}Y6Lc\j
private void fixDown(int k) { v~e@:7d i
int j; j*nZ
while ((j = k << 1) <= size) { 8PB(<|}u
if (j < size %26amp;%26amp; queue[j] j++; _'0HkT{I
if (queue[k]>queue[j]) file://不用交换 r-v;A
break; (xpj?zlmM
SortUtil.swap(queue,j,k); =`[08
k = j; =Ig'Aw$x
} v Ic0V
} 3P~I'FQ
private void fixUp(int k) { u@5vK2
while (k > 1) { /:d03N\9k
int j = k >> 1; _}R?&yO
if (queue[j]>queue[k]) U*`7
break; (g xCP3
SortUtil.swap(queue,j,k); I1yZ7QY
k = j; zJWBovT/
} 0'*whhH
} ]4-lrI1#
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} BM!\U 6
G[n^SEY!
} 0"7xCx
#XR<}OYcL
SortUtil： Hq[d!qc
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package org.rut.util.algorithm; /KjRB_5~q}
)QEvV:\
import org.rut.util.algorithm.support.BubbleSort; h 92\1,
import org.rut.util.algorithm.support.HeapSort; eBX#^
import org.rut.util.algorithm.support.ImprovedMergeSort; 87P{vf#
import org.rut.util.algorithm.support.ImprovedQuickSort; [~9rp]<
import org.rut.util.algorithm.support.InsertSort; '#gd19#
import org.rut.util.algorithm.support.MergeSort; ]C_g:|q
import org.rut.util.algorithm.support.QuickSort; #7I,.DUy[
import org.rut.util.algorithm.support.SelectionSort; x4fl=
import org.rut.util.algorithm.support.ShellSort; ,o7aIg&_H
tgK$}#.*
/** uSCF;y=1g,
* @author treeroot QEK,mc3
* @since 2006-2-2 {Ak{ ct\t
* @version 1.0 t=syo->
*/ [T#5$J
public class SortUtil { rTYDa3
public final static int INSERT = 1; sc'QNhrW
public final static int BUBBLE = 2; *t J+!1
public final static int SELECTION = 3; __r]@hY
public final static int SHELL = 4; |&B.YLx
public final static int QUICK = 5; \9;u.&$mNB
public final static int IMPROVED_QUICK = 6; jjbBv~vs
public final static int MERGE = 7; Ab`mID:
public final static int IMPROVED_MERGE = 8; P/snzm|@
public final static int HEAP = 9; UOHU1.3$T
rU<NHFGj4
public static void sort(int[] data) { s''?: +
sort(data, IMPROVED_QUICK); h1@|UxaE#
} }[XzM/t
private static String[] name={ k<RJSK8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .WM0x{t/
}; l0AgW_T
}MAQhXI^O|
private static Sort[] impl=new Sort[]{ ufAp7m@ud
new InsertSort(), =<w6yeko
new BubbleSort(), d!kiWmw,
new SelectionSort(), wJ@8-H 8}
new ShellSort(), q(<#7spz
new QuickSort(), <ABN/nH
new ImprovedQuickSort(), RB<LZHZI
new MergeSort(), | n5F_RL
new ImprovedMergeSort(), CY;ML6c@
new HeapSort() G6K;3B
}; (,1}P
oR (hL4Dc
public static String toString(int algorithm){ v(D{_
return name[algorithm-1]; AujvKQ(
} HL$}Gh]q
dd1m~Gm
public static void sort(int[] data, int algorithm) { W$LaXytmak
impl[algorithm-1].sort(data); U;Z6o1G
} dK'?<w$
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public static interface Sort { RN\4y{@
public void sort(int[] data); 54~`8f
} 4]9+
nB"r<?n<
public static void swap(int[] data, int i, int j) { &os9K)
int temp = data; KtzoL#CT
data = data[j]; @w&VI6
data[j] = temp; p48M7OV
} 0STtwfTr:
} XH4!|wz