[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; <wIp$F.
} I T*fjUY&
int i1=l; OhA^UP01-
int i2=mid+1; [i,5>YIk
for(int cur=l;cur<=r;cur++){ Up]VU9z
if(i1==mid+1) }0k"SwX
data[cur]=temp[i2++]; 9b{g+lMZo
else if(i2>r) UQC'(>.}
data[cur]=temp[i1++]; w3>Y7vxiz`
else if(temp[i1] data[cur]=temp[i1++]; &*V0(
else "k>{b:R|
data[cur]=temp[i2++]; {GGO')p
} zJB+C=]D7H
} lB5[#z
&lXx0"-$
} z1}tC\9'%
b&U5VA0=1
改进后的归并排序: [)b/uR
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package org.rut.util.algorithm.support; BDB zc5Q(
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import org.rut.util.algorithm.SortUtil; Sgjr4axu
.@x"JI>;
/** erAZG)
* @author treeroot } (GQDJp
* @since 2006-2-2 8V53+]c$Y
* @version 1.0 OTy4"%
*/ @BB,i /
public class ImprovedMergeSort implements SortUtil.Sort { X*p:&=o
Og%zf1)aZM
private static final int THRESHOLD = 10; #!<+:y'S?
4`^TC[
/* FZ}C;yUPD
* (non-Javadoc) r*
* duiKFNYN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *YEIG#`
*/ iz,q8}/(
public void sort(int[] data) { {?h6*>-^Z
int[] temp=new int[data.length]; o^.s!C%j
mergeSort(data,temp,0,data.length-1); Z?G3d(YT
} 4*ty&s=5OJ
5]2!Bb6>
private void mergeSort(int[] data, int[] temp, int l, int r) { 802]M
int i, j, k; P[|BWNei
int mid = (l + r) / 2; !Vod0j">
if (l == r) =tvm=
return; fxf GJNR
if ((mid - l) >= THRESHOLD) p%M(G#gOgP
mergeSort(data, temp, l, mid); J4R
else ^Qb!k/$3y
insertSort(data, l, mid - l + 1); (x*2BEn|
if ((r - mid) > THRESHOLD) S+\Mt+o
mergeSort(data, temp, mid + 1, r); CBgFB-!qpe
else ,~68~_)
insertSort(data, mid + 1, r - mid); Se]t;7j
<3]/ms
for (i = l; i <= mid; i++) { .q& ]wu
temp = data; SUQ}^gn]
} P^{`d_[K%
for (j = 1; j <= r - mid; j++) { =_~'G^`tu
temp[r - j + 1] = data[j + mid]; t+Tg@~K2[>
} C(Bar#
int a = temp[l]; CEJG=*3
int b = temp[r]; @0x.n\M_
for (i = l, j = r, k = l; k <= r; k++) { (V|q\XS
if (a < b) { K|' ]Hje\
data[k] = temp[i++]; S g_?.XZc[
a = temp; '&L
} else { &^Q~G>A
data[k] = temp[j--]; W SeRV?+T
b = temp[j]; <k8rSxn{
} *{n,4d\..
} '2B0D|r"a
} 7}HA_@[
S>zKD
/** &I">{J<
* @param data <zWQ[^
* @param l K`mxb}
* @param i ynz5Dy.d;
*/ !7Q.w/|=
private void insertSort(int[] data, int start, int len) { 5;%xqdD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,}xC) >
} |HIA[.q
} sg~/RSJ3
} X=7vUb,\gB
} W2V@\
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堆排序： PzG:M7
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package org.rut.util.algorithm.support; 2Uw}'J_N
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import org.rut.util.algorithm.SortUtil; Y+PxV*"a
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/** |[t=.dK%
* @author treeroot vTa23YDW
* @since 2006-2-2 G5@@m-
* @version 1.0 NQ{Z
*/ S 2` ;7
public class HeapSort implements SortUtil.Sort{ &~6O;}\
9d|7#)a;
/* (non-Javadoc) ;:YjgZ:+Q]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x{w?X.Nt
*/ DWO:
public void sort(int[] data) { `o-<,
MaxHeap h=new MaxHeap(); w9}IM149
h.init(data); X=}0+W
for(int i=0;i h.remove(); biuo.OG]
System.arraycopy(h.queue,1,data,0,data.length); :Gk~FRA|
} .Zm }
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private static class MaxHeap{ Rla*hc~
"lya|;
void init(int[] data){ %6?}gc_
this.queue=new int[data.length+1]; ^@cX0_
for(int i=0;i queue[++size]=data; )O'<jwp$
fixUp(size); yr DYw T
} PhdL@Mr
} TuR?r`P%
rkXSygb
private int size=0; ]zAg6*-/B
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private int[] queue; CawVC*b3
T0C'$1T
public int get() { V,,iKr@TG
return queue[1]; k}7)pJNj
} Qc/J"<Lx
?Cl"jcQ*
public void remove() { 4H'&5
SortUtil.swap(queue,1,size--); 7t/SZm
fixDown(1); wN.Jyb
} LZ$!=vg4
file://fixdown WJ,ON-v
private void fixDown(int k) { $9$NX/P
int j; o*8 pM`uw
while ((j = k << 1) <= size) { l^Z~^.{y
if (j < size %26amp;%26amp; queue[j] j++; cE?J]5#^
if (queue[k]>queue[j]) file://不用交换 (b5af_ c
break; epe}^Pl
SortUtil.swap(queue,j,k); pm|]GkM
k = j; BGOI
} 4\iQ%fb
} [Y+bW#'
private void fixUp(int k) { J]e&z5c
while (k > 1) { 6jA Q
int j = k >> 1; rZ7 Ihof
if (queue[j]>queue[k]) Ac%K+Pgk.
break; ^\;5O(9
SortUtil.swap(queue,j,k); l1-FL-1
k = j; 5}VP-04vh
} Qmn5-yiw1d
} 3._fbAN%e
GW#Wy=(_
} z9ZAY!Zhq]
,y @3'~
} "a7d`l:
9IMcp~zX
SortUtil： KYaf7qy]
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package org.rut.util.algorithm; ^W*/!q7H
~1oD7=WN
import org.rut.util.algorithm.support.BubbleSort; YXEZ&$e'
import org.rut.util.algorithm.support.HeapSort; I._=q
import org.rut.util.algorithm.support.ImprovedMergeSort; 0v?,:]A0E
import org.rut.util.algorithm.support.ImprovedQuickSort; WF7RMQ51j
import org.rut.util.algorithm.support.InsertSort; cE[lB08
import org.rut.util.algorithm.support.MergeSort; -1:asM7
import org.rut.util.algorithm.support.QuickSort; uVocl,?.L
import org.rut.util.algorithm.support.SelectionSort; ;f?bb*1
import org.rut.util.algorithm.support.ShellSort; Pa*yo:U'h
wl4yNC
/** ~czt=
* @author treeroot B(5g&+{Lq~
* @since 2006-2-2 MvCBgLN
* @version 1.0 ?.H*!u+9>
*/ l;ugrAo?
public class SortUtil { Fei$94a
public final static int INSERT = 1; %F7k| Na
public final static int BUBBLE = 2; 7pNh|#Uv'
public final static int SELECTION = 3; 7gkHKdJoMA
public final static int SHELL = 4; %k~=iDk@
public final static int QUICK = 5; wFD.3!
public final static int IMPROVED_QUICK = 6; 9/Ls3U?
public final static int MERGE = 7; MD,-<X)Qy
public final static int IMPROVED_MERGE = 8; !Kis,e
public final static int HEAP = 9; K"D9.%7
l6~eb=u;9g
public static void sort(int[] data) { `'/8ifKz
sort(data, IMPROVED_QUICK); KK?}`o
} l[xwH 9'
private static String[] name={ |7argk+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ugn"w E
}; $_y"P
'oTF$3n
private static Sort[] impl=new Sort[]{ mxIEg?r(
new InsertSort(), 9Ah4N2nL-b
new BubbleSort(), q&vr;fB2
new SelectionSort(), >,[(icyzn
new ShellSort(), 8WvT0q>]
new QuickSort(), {MHr]A}X\
new ImprovedQuickSort(), rO C~U85
new MergeSort(), qnOAIP:0
new ImprovedMergeSort(), UwLa9Dn^
new HeapSort() *+ 7#z;
}; ;y"DEFs,u
)XD_Yq@E
public static String toString(int algorithm){ milU,!7J
return name[algorithm-1]; lHx$F?
} P6MT[
PKP(:3|
public static void sort(int[] data, int algorithm) { H*Yyo?
impl[algorithm-1].sort(data); ?vXy7y&4
} rIXAn4,dTv
&ha39&I
public static interface Sort { qLR)>$
public void sort(int[] data); 3+)i23[4=\
} t({:TQ
C&Rv)j
public static void swap(int[] data, int i, int j) { x{=ty*E
int temp = data; 6`4=!ZfI
data = data[j]; k'm!|
data[j] = temp; MQhL>oQ
} ]86U-`p
} YYhRdU/g