[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; DPTk5o[
} *h!fqT%9
int i1=l; P5h|* ?=
int i2=mid+1; ] 3"t]U'f
for(int cur=l;cur<=r;cur++){ hMDd*<%l
if(i1==mid+1) " B#|C'
data[cur]=temp[i2++]; t'rN7.d
else if(i2>r) mm-s?+&M;
data[cur]=temp[i1++]; l@4_D;b3o"
else if(temp[i1] data[cur]=temp[i1++]; NQk aW)
else mll:rWC)
data[cur]=temp[i2++]; f"QiVJq
} &riGzU]
} ;*<tU n^t
Y%s:oHt
} 2 |s ohF
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改进后的归并排序: `Y#At3{
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package org.rut.util.algorithm.support; Km` SR^&\
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import org.rut.util.algorithm.SortUtil; I0Pw~Jj{
:v&[!
/** M"~jNe|
* @author treeroot #z*,CU#S9d
* @since 2006-2-2 9%/hoA)
* @version 1.0 XO <wK
*/ 2/LSB8n|
public class ImprovedMergeSort implements SortUtil.Sort { yn4T!r "
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private static final int THRESHOLD = 10; 3S0.sU~_U
> ;,S||
/* Xwm3# o.&)
* (non-Javadoc) d7OygDb<
* QU"WpkO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `fu_){
*/ Dyov}y
public void sort(int[] data) { _bFUr
int[] temp=new int[data.length]; :t}\%%EbmE
mergeSort(data,temp,0,data.length-1); ejROJXB
} M tN>5k c
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private void mergeSort(int[] data, int[] temp, int l, int r) { t un}rdb
int i, j, k; #@XBHJD\#
int mid = (l + r) / 2; {keZ_2
if (l == r) sZ.<:mu[
return; DJP6Z
if ((mid - l) >= THRESHOLD) $*Ucfw1T
mergeSort(data, temp, l, mid); ~f/|bcep
else Njq}M/{U
insertSort(data, l, mid - l + 1); 44]s`QyG
if ((r - mid) > THRESHOLD) *FS8]!Qg
mergeSort(data, temp, mid + 1, r); kB7vc>@1
else 6EqA Y`y
insertSort(data, mid + 1, r - mid); i! .]U@{k
IpP%WW u
for (i = l; i <= mid; i++) { +&GV-z~o
temp = data; wq)*bIv
} q6 CrUn
for (j = 1; j <= r - mid; j++) { Ss3p6%V/
temp[r - j + 1] = data[j + mid]; A2_ut6&eb
} ?w3RqF@}
int a = temp[l]; u?osX;'w
int b = temp[r]; w:&""'E
for (i = l, j = r, k = l; k <= r; k++) { 7CIN!vrC|1
if (a < b) { zj 6I:Qr
data[k] = temp[i++]; MK&,2>m,A
a = temp; JGs:RD'
} else { lZFu|(
data[k] = temp[j--]; !Sc"V.o@!
b = temp[j]; 5mH[|_
} b!<_ JOL2.
} #M,&g{
} _&gi4)q
Y:^hd809
/** L%'J]HL-
* @param data bJd|mm/v
* @param l _`$Q6!Z)l
* @param i !_QI<=X
*/ Gh;\"Qx
private void insertSort(int[] data, int start, int len) { TI>5g(:3\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,jU>V]YC
} KVi6vdgD
} ,Qj G|P
} uD\R3cY
} i7x&[b
~7m`p3W@
堆排序： &<&tdShI
19 5_1?'<
package org.rut.util.algorithm.support; 5Rbl.5.A
bnxp[Qk|5
import org.rut.util.algorithm.SortUtil; 'gwh:
wNB?3v{n
/** )CGQ}
* @author treeroot LdUz;sb
* @since 2006-2-2 26V6Y2X
* @version 1.0 lhUGo =
*/ Gu;40)gm
public class HeapSort implements SortUtil.Sort{ LjKxznn o
inu.U[.
/* (non-Javadoc) D T5d]MU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @iz Onc:
*/ X3:1KDVsV
public void sort(int[] data) { #MC#K{Xd
MaxHeap h=new MaxHeap(); <ZC.9
h.init(data); P`tOL#UeZL
for(int i=0;i h.remove(); dc$zW^i
System.arraycopy(h.queue,1,data,0,data.length); vo/x`F'ib
} n:AZ(f
SSe;&Jk2d
private static class MaxHeap{ u`ir(JIj]
y-pdAkDh
void init(int[] data){ D+T/ Z)
this.queue=new int[data.length+1]; b9g2mWL\T
for(int i=0;i queue[++size]=data; #X(2
fixUp(size); S|tD8A
} [s}W47N1
} g;l K34{
fh#:j[R4e
private int size=0; GMU!GSY
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private int[] queue; :tWkK$
xI,3(A.
public int get() { }B%9cc
return queue[1]; b+Q{Z*
} VgPlIIHh5
g? vz\_
public void remove() { +9/K|SB{$
SortUtil.swap(queue,1,size--); +G;<D@gSa0
fixDown(1); m mF0RNE
} :EW1I>}_
file://fixdown rBJ`=oz
private void fixDown(int k) { B4 bB`r
int j; +149 o2
while ((j = k << 1) <= size) { bI.hG32
if (j < size %26amp;%26amp; queue[j] j++; &5}YTKe}|
if (queue[k]>queue[j]) file://不用交换 \p:)Cdn
break; CG uuadNI
SortUtil.swap(queue,j,k); ( yLu=
k = j; 4EYD5
} a3n Wt
} 0 Rb3|te
private void fixUp(int k) { D)MFii1J~
while (k > 1) { V;^-EWNj
int j = k >> 1; E2|M#Y
if (queue[j]>queue[k]) o^@#pU <
break; ,wf_o%'eW
SortUtil.swap(queue,j,k); }:?*n:g5
k = j; r'ilJ("
} 5H'Iul<Os
} @l3&vt2=J
1GA.c:
} ^5Y<evjm
;nlJD#
} #@nPB.
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SortUtil： H-t$A, [
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package org.rut.util.algorithm; hxdjmc-
{^ BZ#)m|
import org.rut.util.algorithm.support.BubbleSort; 0aq{Y7sYU
import org.rut.util.algorithm.support.HeapSort; 5%wA"_
import org.rut.util.algorithm.support.ImprovedMergeSort; S%H"i y
import org.rut.util.algorithm.support.ImprovedQuickSort; i=5!taxu}E
import org.rut.util.algorithm.support.InsertSort; ipG 0ie+
import org.rut.util.algorithm.support.MergeSort; ZYB5s~;eB"
import org.rut.util.algorithm.support.QuickSort; %#fjtbeB
import org.rut.util.algorithm.support.SelectionSort; TlO=dLR7d
import org.rut.util.algorithm.support.ShellSort; |5(CzXR]
F.(W`H*1+
/** 6x5Q*^w
* @author treeroot "#36-
* @since 2006-2-2 D=LsoASVI
* @version 1.0 g[y&GCKY!=
*/ alxIc.[
public class SortUtil { D,$M$f1
public final static int INSERT = 1; V6>{k_0{V
public final static int BUBBLE = 2; 9k4z__Ke
public final static int SELECTION = 3; 'oGMr=gp<&
public final static int SHELL = 4; EAh|$~X
public final static int QUICK = 5; + S5uxO
public final static int IMPROVED_QUICK = 6; vh|m[p
public final static int MERGE = 7; /:-ig .YY
public final static int IMPROVED_MERGE = 8; U e-AF#
public final static int HEAP = 9; {y|.y~vW
^^V+0 l
public static void sort(int[] data) { )#Ecm<.^
sort(data, IMPROVED_QUICK); dr8Q>(ZY
} aR)UHxvX
private static String[] name={ /2r&ga&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |Eu#mN
}; (RUc>Qi
6."|m+D
private static Sort[] impl=new Sort[]{ }WR@%)7ay
new InsertSort(), yqJ>Z%)hf
new BubbleSort(), gjJ:s,Fg
new SelectionSort(), rIyIZWkI
new ShellSort(), Vs>e"czfm/
new QuickSort(), 5a5JOl$8
new ImprovedQuickSort(), %h_N%B$7c1
new MergeSort(), .i7"qq.M
new ImprovedMergeSort(), X#W6;?Z\
new HeapSort() OK@yMGz1I
}; F(U(b_DPM
5:~ zlg
public static String toString(int algorithm){ Kk% IN9
return name[algorithm-1]; ASS<XNP
} ip|l3m$Mi
Ngrj@_J
public static void sort(int[] data, int algorithm) { r-hb]!t
impl[algorithm-1].sort(data); 5M%)*.Y 3[
} U,<?]h
e{Mkwi+j
public static interface Sort { 2 I.Q-'@
public void sort(int[] data); 0sq?>$~Kc*
} w~AO;X*Ke"
w\JTMS$
public static void swap(int[] data, int i, int j) { ypvz&SzIh
int temp = data; |i(@1 l
data = data[j]; 9KL)5_6 M
data[j] = temp; L3S29-T
} H9=8nLb.
} Jk`0yJi$q