[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; A":x<9
} `R;XN-
int i1=l; #+=afJ
int i2=mid+1; T;7|d5][
for(int cur=l;cur<=r;cur++){ 2x CGr>X
if(i1==mid+1) SOJHw6
data[cur]=temp[i2++]; Pr'py
else if(i2>r) 35et+9
data[cur]=temp[i1++]; 5#tvc4+)
else if(temp[i1] data[cur]=temp[i1++]; C5FtJquGN)
else EA72%Y9F
data[cur]=temp[i2++]; WX9BS$}0
} >ZWm0nTr
} 5O*$#C;c
ZN/")
} J3vuh#
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改进后的归并排序: )^AO?MW
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package org.rut.util.algorithm.support; Z_/03K$q
$TiAJ}:
import org.rut.util.algorithm.SortUtil; cA,xf@itp
-#h \8Xl
/** O,PHAwVG%L
* @author treeroot Q}]un]]Zt
* @since 2006-2-2 &3MHe$
* @version 1.0 ?e*vvu33!
*/ ~$<@:z{*
public class ImprovedMergeSort implements SortUtil.Sort { -i4gzak
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private static final int THRESHOLD = 10; GfV9Ox
LE"xZxe
/* w@R-@ G
* (non-Javadoc) W%x#ps5%
* ZO}*^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fej$`2mRH
*/ z Ey&%Ok
public void sort(int[] data) { ?IWS
int[] temp=new int[data.length]; w*x}4wW
mergeSort(data,temp,0,data.length-1); 1k`!w}
} ?*HlAVDcFT
a+d|9y/k
private void mergeSort(int[] data, int[] temp, int l, int r) { Uz6B\-(0p
int i, j, k; ]|oqJ2P
int mid = (l + r) / 2; ?0F#\0
if (l == r) C" {j0X`
return; x.aUuC,$x
if ((mid - l) >= THRESHOLD) )yJjJ:re
mergeSort(data, temp, l, mid); _*_zyWW_j
else YN^8s
insertSort(data, l, mid - l + 1); j"]%6RwM]
if ((r - mid) > THRESHOLD) V=U%P[S
mergeSort(data, temp, mid + 1, r); Aka`L:k
else $J+$8pA
insertSort(data, mid + 1, r - mid); mDhU wZH
1Pbp=R/7ar
for (i = l; i <= mid; i++) { .(krB%N
temp = data; <qu\q \
} -HOCxR
for (j = 1; j <= r - mid; j++) { Z|.z~53;
temp[r - j + 1] = data[j + mid]; 1*5n}cU~
} fw5AZvE6$
int a = temp[l]; s<{c?4T
int b = temp[r]; "D+QT+sD
for (i = l, j = r, k = l; k <= r; k++) { +KZc"0?
if (a < b) { X~0P+E#
data[k] = temp[i++]; {u7E)Fdl
a = temp; p[RD[&#b
} else { B{Rig5Sc
data[k] = temp[j--]; iJcl0)|
b = temp[j]; rW6LMkt72
} $JOIK9+3z#
} @-wAR=k7
} X^?-Une
a&&EjI
/** *i|hcDk
* @param data W`KkuQ4cM
* @param l m1TPy-|1
* @param i qsLsyi|zG
*/ WH!<Z=#c}
private void insertSort(int[] data, int start, int len) { kG E|17I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h<uQ~CQg
} {)G3*>sG3
} >?5`FC
} >DDQ7 l
} $>+-=XMVB
;9rQN3J$gn
堆排序： k[][Md2Vh
g&"Nr aQM9
package org.rut.util.algorithm.support; TYp{nWwi
PUI.Un2C_
import org.rut.util.algorithm.SortUtil; GYj`-t
gpPktp2
/** hPl;2r
* @author treeroot dK=BH=S2?X
* @since 2006-2-2 r`5;G4UI
* @version 1.0 0X@5W$x
*/ 6rk/74gI,a
public class HeapSort implements SortUtil.Sort{ KxvT}"k
+_+_`q>]
/* (non-Javadoc) ym:JtI69
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4;_.|!LN
*/ Q)v8hNyUmA
public void sort(int[] data) { sQR;!-j
MaxHeap h=new MaxHeap(); Ih{~?(V$
h.init(data); T_r[#j
for(int i=0;i h.remove(); *rWE.4=&
System.arraycopy(h.queue,1,data,0,data.length); 0KEytm]
} q.#aeqKBP
Od"-w<'
private static class MaxHeap{ y};qo'dlt
UHXlBH@
void init(int[] data){ %o~zsIl
this.queue=new int[data.length+1]; :QN,T3i'/3
for(int i=0;i queue[++size]=data; \4V'NTjB
fixUp(size); GU!|J71z
} am`eist:
} J9/w_,,R$
f}*Xz.[bCp
private int size=0; iud%X51
)p&xpB(
private int[] queue; U9Y'eP.2
u+{5c5_
public int get() { ]SK(cfA`
return queue[1]; DK:d'zb
} p/@z4TCNX
{`-EX
public void remove() { IUzRE?Kzf
SortUtil.swap(queue,1,size--); bBjVot
fixDown(1); E#T'=f[r~
} bMgp
file://fixdown :5;[Rg5 2
private void fixDown(int k) { AX6e}-S1n
int j; I(<1-3~
while ((j = k << 1) <= size) { =MMWcK&
if (j < size %26amp;%26amp; queue[j] j++; a29mVmi>
if (queue[k]>queue[j]) file://不用交换 )M1.>?b
break; K":-zS
SortUtil.swap(queue,j,k); XfB;^y=u8
k = j; Yzd-1Jvk
} >5 Ce/P'R
} Oi7|R7NE
private void fixUp(int k) { <{e0i
while (k > 1) { %R(j|a9z
int j = k >> 1; #E>f.:)
if (queue[j]>queue[k]) |i1z47jN6P
break; UUX _x?BD
SortUtil.swap(queue,j,k); s*rtm
k = j; Rb#?c+&#
} x!S8'
} 10*U2FY)]
Rnj2Q!C2
} 6Bs_" P[
H3MT.Cpd
} 1w?X~VZAX
ZSxKk6n}J
SortUtil： !iITX,'8
5PdC4vI*+
package org.rut.util.algorithm; vVE^Y
;0@"1`
import org.rut.util.algorithm.support.BubbleSort; Jg^tr>I~
import org.rut.util.algorithm.support.HeapSort; SxMh '
import org.rut.util.algorithm.support.ImprovedMergeSort; I#9A\.pO
import org.rut.util.algorithm.support.ImprovedQuickSort; UT"L5{c
import org.rut.util.algorithm.support.InsertSort; A9F Z`
import org.rut.util.algorithm.support.MergeSort; @"Do8p!*(6
import org.rut.util.algorithm.support.QuickSort; v)BUt,A
import org.rut.util.algorithm.support.SelectionSort; %o.+B~r
import org.rut.util.algorithm.support.ShellSort; %N>@( .
_M{m6k(h
/** sd Z=3)
* @author treeroot obUh+9K
* @since 2006-2-2 ?zxKk(J
* @version 1.0 8> Gp #T
*/ M1VRc[ RRo
public class SortUtil { s|dL.@0,L
public final static int INSERT = 1; AQ@A$
public final static int BUBBLE = 2; )p(XY34]
public final static int SELECTION = 3; ))u$j4V
public final static int SHELL = 4; julAN$2
public final static int QUICK = 5; {_PV~8u
public final static int IMPROVED_QUICK = 6; VAV@Qn
public final static int MERGE = 7; IC7n;n9
public final static int IMPROVED_MERGE = 8; :x= ZvAvo
public final static int HEAP = 9; }?"f#bI
CEt_wKzf
public static void sort(int[] data) { |(Io(e
sort(data, IMPROVED_QUICK); \U p<m>3\
} I5PaY.i
private static String[] name={ 5Gg`+o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -H{c@hl
}; lAV6z%MmM
dc"Vc 3)
private static Sort[] impl=new Sort[]{ HA"LU;5>2J
new InsertSort(), vBq2JJAl
new BubbleSort(), P6;L\9=H<
new SelectionSort(), luAhyEp
new ShellSort(), +n1}({7m
new QuickSort(), *COr^7Kf5
new ImprovedQuickSort(), [K%Jt
new MergeSort(), G`gYwgU;
new ImprovedMergeSort(), #>[+6y]U!
new HeapSort() sLb[ZQ;j
}; qky{]qNW
(~,Q-w"
public static String toString(int algorithm){ 7RTp+FC]
return name[algorithm-1]; T3Qa[>+\
} '0z@Jevd?
8M8=uw~#
public static void sort(int[] data, int algorithm) { LR'F/.Dx
impl[algorithm-1].sort(data); 5=5~GX-kr
} MhHygZT[}
wIL5-k,
public static interface Sort { @I#@%"AW
public void sort(int[] data); ppfBfMX
} L)4TW6IUk
B4_0+K H
public static void swap(int[] data, int i, int j) { X|@|ZRN
int temp = data; h,0mJj-ma
data = data[j]; !Vv$
data[j] = temp; :1=mNrg
} M*{EK
} mp%i(Y"vp