[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; VXkAFgO
} mC:X4l]5
int i1=l; A3"1D
int i2=mid+1; VPM|Rj:d
for(int cur=l;cur<=r;cur++){ +#*&XX5A#?
if(i1==mid+1) kQwm"Z
data[cur]=temp[i2++]; L7Qo-
else if(i2>r) ]D{c4)\7C|
data[cur]=temp[i1++]; pfL2v,]g
else if(temp[i1] data[cur]=temp[i1++]; r}R^<y@I
else dqD;y#/
data[cur]=temp[i2++]; 8K.s@<
} EvqUNnjR
} i'!jx.
cBab2/
} Yz2{LW[K
BZJKiiD
改进后的归并排序: |I}A>XG
Kd/[Bs%
package org.rut.util.algorithm.support; Ehb?CnV#J
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import org.rut.util.algorithm.SortUtil; TwM1M["3
,b6kTQq
/** nY{i>Y
* @author treeroot NokXE
* @since 2006-2-2 Z[#I"-Q~:
* @version 1.0 'f-
*/ N b3I%r
public class ImprovedMergeSort implements SortUtil.Sort { { r6]MS#l1
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private static final int THRESHOLD = 10; 5;FP.{+
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/* *MYt:ms
* (non-Javadoc) :3a&Pb*PL
* ;23=p=/h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n2n00%Wu[
*/ #"Eks79s
public void sort(int[] data) { S)"##-~`T
int[] temp=new int[data.length]; YKP=0 j3,
mergeSort(data,temp,0,data.length-1); |?x^8e<*
} ,VKQRmd
m x3}m?WQ
private void mergeSort(int[] data, int[] temp, int l, int r) { [as-3&5S
int i, j, k; _kn]#^ucCe
int mid = (l + r) / 2; +P[88!
if (l == r) u?q&K|
return; <G\ <QV8W
if ((mid - l) >= THRESHOLD) 6sYV7w,'@
mergeSort(data, temp, l, mid); .-.q3ib
else j7@!J7S
insertSort(data, l, mid - l + 1); ljup#:n
if ((r - mid) > THRESHOLD) ulH0%`Fi
mergeSort(data, temp, mid + 1, r); V.;:u#{@-Q
else M4TrnZ1D}
insertSort(data, mid + 1, r - mid); qs!>tw
,'FD}yw4v
for (i = l; i <= mid; i++) { $Q8P@L)[
temp = data; k(zs>kiP
} GhqgRzX
for (j = 1; j <= r - mid; j++) { *-9#/Cp
temp[r - j + 1] = data[j + mid]; T$H2'tK|
} rGTWcJ
int a = temp[l]; `]K,'i{R
int b = temp[r]; ;c>>$lr
for (i = l, j = r, k = l; k <= r; k++) { 6RH/V:YY
if (a < b) { 4JGE2ArR
data[k] = temp[i++]; xJvLuzUD
a = temp; u=vh Z%A]
} else { 8W-]t1O%!
data[k] = temp[j--]; 5{')GTdX>
b = temp[j]; "w*@R8v
} shM{Y9~O9&
} =MMCf0
} B^Xy0fq
G3H#XK D
/** HjV\lcK:v
* @param data *I=_*LoG2
* @param l azvDvEWCQZ
* @param i |xq}'.C
*/ M|U';2hZN:
private void insertSort(int[] data, int start, int len) { %v]7BV^%6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ER{yuw
} BwJNi6,
} IK8%Q(.c
} L<0=giE
} (.PmDBW
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堆排序： GSQfg
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package org.rut.util.algorithm.support; -<O JqB
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import org.rut.util.algorithm.SortUtil; 9#u}^t
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/** BApa^j\?
* @author treeroot ]X*YAPv
* @since 2006-2-2 9^oo-,Su_
* @version 1.0 y0;,dv]
*/ /a%*u6z@
public class HeapSort implements SortUtil.Sort{ (%i!%{!]
l#Yx TY
/* (non-Javadoc) 7k>zuzRyF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q5g,7ac8L
*/ 1x{XE*%;
public void sort(int[] data) { Mz93
MaxHeap h=new MaxHeap(); ^ b@!dS
h.init(data); w.tW=z5
for(int i=0;i h.remove(); BjYOfu'~z
System.arraycopy(h.queue,1,data,0,data.length); B-$+UE>%
} XHy?
~fBex_.o*
private static class MaxHeap{ l7ZB3'
(JWv *p
void init(int[] data){ Q]/B/
this.queue=new int[data.length+1]; t7&Dwmck9
for(int i=0;i queue[++size]=data; sqT^t!
fixUp(size); 6Hda]y
} RXM}hqeG
} A&NqQ V,
6>s=CiZB
private int size=0; q=njKC
;:U<ce=
private int[] queue; O'OFz}x),
A9t8`|1"%H
public int get() { Gp,'kw"I
return queue[1]; :v_w!+,/
} x=h0Fq,T
oQ{cSThj
public void remove() { o'96ON0
SortUtil.swap(queue,1,size--); b9y)wBC%`
fixDown(1); G,B?&gFX
} 5.dl>,
file://fixdown KhrFg1|
private void fixDown(int k) { *(icR
int j; Z&A0hI4d
while ((j = k << 1) <= size) { TQ?#PRB
if (j < size %26amp;%26amp; queue[j] j++; ly[lrD0Kn.
if (queue[k]>queue[j]) file://不用交换 !f`5B( @
break; [$;,Ua-mt
SortUtil.swap(queue,j,k); :b5XKv^
k = j; W]zwghxH
} .ots?Ns
} w [L&*
private void fixUp(int k) { 1#]B^D
while (k > 1) { J]dW1boT@
int j = k >> 1; ~?CS_B *
if (queue[j]>queue[k]) *.o"ZVl
break; 3+%nn+m
SortUtil.swap(queue,j,k); z<i,D08|d
k = j; ?T <rt
} ~~@y_e[N#l
} =D5wqCT(Q
S_$nCyaH2
} eKyqU9
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} p.5e: i^LJ
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SortUtil： :kt/$S^-
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package org.rut.util.algorithm; L/%Y#
|*ReqM|_C
import org.rut.util.algorithm.support.BubbleSort; 3[.3dy7,Z
import org.rut.util.algorithm.support.HeapSort; UG #X/%p
import org.rut.util.algorithm.support.ImprovedMergeSort; {l@WCR
import org.rut.util.algorithm.support.ImprovedQuickSort; n_}aZB3;U
import org.rut.util.algorithm.support.InsertSort; %XR<isn
import org.rut.util.algorithm.support.MergeSort; me:iQ.g
import org.rut.util.algorithm.support.QuickSort; \+9;!VWhl
import org.rut.util.algorithm.support.SelectionSort; JL``iA
import org.rut.util.algorithm.support.ShellSort; c@9##DPn
Ok,HD7
/** n>S2}y
* @author treeroot bM^7g
* @since 2006-2-2 ~3d*b8
* @version 1.0 g8'~e{=(
*/ 3 1k
public class SortUtil { 5#2jq<D
public final static int INSERT = 1; #Skj#)I"
public final static int BUBBLE = 2; p_r4^p\
public final static int SELECTION = 3; [83>T ,
public final static int SHELL = 4; 6#vI;d[^
public final static int QUICK = 5; ` jyKCm.$#
public final static int IMPROVED_QUICK = 6; &//2eL
public final static int MERGE = 7; TA|s@T{
public final static int IMPROVED_MERGE = 8; ?9Ma^C;}
public final static int HEAP = 9; E>"8/
($'V&x8T
public static void sort(int[] data) { .lr5!Stb
sort(data, IMPROVED_QUICK); /=@e &e
} =W<[Fe3
private static String[] name={ tH,sql)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B$j' /e-Zk
}; h;nQxmJ9
^N{k6>;
private static Sort[] impl=new Sort[]{ ,\x$q'
new InsertSort(), #2N_/J(U
new BubbleSort(), X|'2R^V.
new SelectionSort(), MnS+nH!d
new ShellSort(), DN<M?u]
new QuickSort(), ?<6@^X"
new ImprovedQuickSort(), c$A@T~$
new MergeSort(), -"tY{}z
new ImprovedMergeSort(), kT2Wm/L
new HeapSort() {Xv3:"E"O
}; ]=Pu\eE
]'g:B p
public static String toString(int algorithm){ 5NFRPGYX
return name[algorithm-1]; a%*_2#
} -K^41W71
tgB=vIw?3
public static void sort(int[] data, int algorithm) { +99Bi2H}o
impl[algorithm-1].sort(data); QtlT&|$
} *uU4^E(
y;QQ| =,
public static interface Sort { B:nK)"{
public void sort(int[] data); M $uf:+F
} A%n?}
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public static void swap(int[] data, int i, int j) { NNp}|a9
int temp = data; _#vGs:-x&
data = data[j]; ^)<w*iqBD
data[j] = temp; SBL+e]P
} JqSr[q
} 0 u2Ny&6w