[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; q`.=/O'
} IOF!Ra:w
int i1=l; US=K}B=g
int i2=mid+1; q@~{g[
for(int cur=l;cur<=r;cur++){ zb4{nzX=
if(i1==mid+1) Ke3~o"IQ
data[cur]=temp[i2++]; (:o:_U
else if(i2>r) cui%r!D
data[cur]=temp[i1++]; HG< z,gE 2
else if(temp[i1] data[cur]=temp[i1++]; BTYYp1
else }Y|M+0
data[cur]=temp[i2++]; $tI<MZ&Z
} 2y|n!p T
} mdQe)>
S:Jg#1rww-
} _Pa@%/
8SLE*c^8
改进后的归并排序: )f8;ze
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package org.rut.util.algorithm.support; 7E#h(bt j
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import org.rut.util.algorithm.SortUtil; EVBOubV
;DhAw1
/** nqx0#_K-E
* @author treeroot 63_#*6Pv28
* @since 2006-2-2 Ayv:Pv@
* @version 1.0 V6_5v+n
*/ );yZyWDV
public class ImprovedMergeSort implements SortUtil.Sort { ,3iD/8_
0v9i43[S|J
private static final int THRESHOLD = 10; n/ :#:
=hd0Ui>x
/* tZm`(2S
* (non-Javadoc) +5I'? _{V
* 6v]`s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dZ8ldpf8
*/ I Z*)
public void sort(int[] data) { (v KJyk+Y
int[] temp=new int[data.length]; 2hso6Oy/v{
mergeSort(data,temp,0,data.length-1); o2bmsnXQ
} nk_X_y
c`hENPhW
private void mergeSort(int[] data, int[] temp, int l, int r) { 8z7eL>)
int i, j, k; PhV/WjCZ
int mid = (l + r) / 2; )E7wBNV
if (l == r) L[<Y6u>m!1
return; BNA1"@9q
if ((mid - l) >= THRESHOLD) xdDe@G;"
mergeSort(data, temp, l, mid); ~% t'}JDZ
else "PWGtM:L8Y
insertSort(data, l, mid - l + 1); -P-8D6
if ((r - mid) > THRESHOLD) 0u&x%c
mergeSort(data, temp, mid + 1, r); nUVk;0at
else w-$iKtb.
insertSort(data, mid + 1, r - mid); (x@J@ GP*
TuPD5-wB&
for (i = l; i <= mid; i++) { ntB#2S
temp = data; ,quUGS
} BFP@Yn~k
for (j = 1; j <= r - mid; j++) { {oF;ZM'r
temp[r - j + 1] = data[j + mid]; 1{]S[\F]
} Y,yU460T8
int a = temp[l]; s]`6uyW"
int b = temp[r]; 2M\7j
for (i = l, j = r, k = l; k <= r; k++) { n@h$V\&\iM
if (a < b) { `F1Yfm jZT
data[k] = temp[i++]; yS:w>xU @<
a = temp; ~;pP@DA
} else { B0p;Zh
data[k] = temp[j--]; hR:i!
b = temp[j]; _A& [rBm|
} " W{rS4L
} v$x)$/]n
} ^_V0irv
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/** (fr=[m$`
* @param data -^t.eZ*|
* @param l d2US~.;>l
* @param i 7QZyd-
*/ 5 8L@:>"
private void insertSort(int[] data, int start, int len) { /X0<2&v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lx0BKD?n
} <^Y#q
} tn _\E/Q
} `s\[X-j]
} kB5y}v.3 S
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堆排序： P s|[
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package org.rut.util.algorithm.support; QhAYCw2
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import org.rut.util.algorithm.SortUtil; jjv'"K2
lA4J#
/** K.&6c,P]
* @author treeroot &z*4Uij
* @since 2006-2-2 sAs`O@
* @version 1.0 w8cnSO
*/ U8HuqFC
public class HeapSort implements SortUtil.Sort{ tj8o6N#
;}KJ[5i-V
/* (non-Javadoc) 4AvIU!0w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z\QNn
*/ 3m21n7F4*
public void sort(int[] data) { /:BC<]s
MaxHeap h=new MaxHeap(); Uvi@HB HJ
h.init(data); *Sbc 8Y
for(int i=0;i h.remove(); SX =^C
System.arraycopy(h.queue,1,data,0,data.length); =%>E8)Jb
} jJ@@W~/)B
@n9iOf~<
private static class MaxHeap{ ]d%Ou]609
ts@e ,
void init(int[] data){ W$l4@A
this.queue=new int[data.length+1]; DIvxut
for(int i=0;i queue[++size]=data; ?vF8 y;Jh
fixUp(size); (r'NB
} )PkGT~3I
} )[&j&AI
Dk")/ ib
private int size=0; -sle7k
zH~g5xgh
private int[] queue; c$u#U~~
6"rS?>W/mO
public int get() { FcOrA3tt
return queue[1]; IsFL"Vx
} ww%4MHPp8
QZO<'q`L
public void remove() { +:c}LCI9<
SortUtil.swap(queue,1,size--); yd45y}uS;F
fixDown(1); +, rm
} v] Xy^7?
file://fixdown n4"xVDL
private void fixDown(int k) { h4ghMBo%
int j; AI9=?X<kh
while ((j = k << 1) <= size) { -A:'D8o#f
if (j < size %26amp;%26amp; queue[j] j++; Kl(u~/=6
if (queue[k]>queue[j]) file://不用交换 ~aL?{kb+
break; Hb^ovc0
SortUtil.swap(queue,j,k); mryT%zSlM
k = j; v"J|Ebx
} cj[%.M5iBA
} H66~!J0;a
private void fixUp(int k) { ?iaO6HD
while (k > 1) { Na.e1A&?j
int j = k >> 1; uIJ zz4
if (queue[j]>queue[k]) ?4Zo0DiUB
break; ,? &$c+
SortUtil.swap(queue,j,k); 1ahb:Mjv
k = j; XFww|SG$
} $uK[[k~=S
} E`iE]O
lx82:_
} y] $-:^
,qdZ6bv,]|
} MSt@yKq
Z$)jPDSr
SortUtil： B|;?#okx
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package org.rut.util.algorithm; :{Iv ]d
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import org.rut.util.algorithm.support.BubbleSort; AIA4c"w.EO
import org.rut.util.algorithm.support.HeapSort; b&pL}o?/k
import org.rut.util.algorithm.support.ImprovedMergeSort; +gb"} cN
import org.rut.util.algorithm.support.ImprovedQuickSort; )f%Q7
import org.rut.util.algorithm.support.InsertSort; *NIhYg6
import org.rut.util.algorithm.support.MergeSort; %9t=Iu*
import org.rut.util.algorithm.support.QuickSort; <<1_rRL]
import org.rut.util.algorithm.support.SelectionSort; ~~WX#Od*$
import org.rut.util.algorithm.support.ShellSort; %BRll
6b4]dvl_
/** elP#s5l4
* @author treeroot :Ui'x8yt
* @since 2006-2-2 H<`7){iG
* @version 1.0 M;@/697G
*/ `{J(S'a`
public class SortUtil { >9Y0t^Fl
public final static int INSERT = 1; _#o75*42tT
public final static int BUBBLE = 2; r9^~I
public final static int SELECTION = 3; TIP H#W:v
public final static int SHELL = 4; Vvl8P|x.<
public final static int QUICK = 5; byj7c(
public final static int IMPROVED_QUICK = 6; YzAGhAyw
public final static int MERGE = 7; };8PPR)\y
public final static int IMPROVED_MERGE = 8; V%J_iY/BUb
public final static int HEAP = 9; #w)D ml
xEe3,tb'e
public static void sort(int[] data) { 3:!5 ]
sort(data, IMPROVED_QUICK); BOW`{=
} Xm.["&
private static String[] name={ I;?np
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mC`U"rlK~
}; y@]:7
G\S_e7$/
private static Sort[] impl=new Sort[]{ t-J\j"~%+
new InsertSort(), ]B-3Lh
new BubbleSort(), D4QLlP
new SelectionSort(), ZL- ` 3x
new ShellSort(), uy=E92n3
new QuickSort(), 1Q??R}
new ImprovedQuickSort(), +0n,>eDjg^
new MergeSort(), d7L|yeb"
new ImprovedMergeSort(), C;rK16cn
new HeapSort() xo(3<1mD
}; p/&s-GF
5%XEybc2
public static String toString(int algorithm){ ]4-t*Em
return name[algorithm-1]; CLY>M`%?+p
} ]=0$-ImQ@x
NE!]
public static void sort(int[] data, int algorithm) { uB3Yl=P
impl[algorithm-1].sort(data); @>hXh +!2h
} >U[YSsFt6
je~gk6}Y
public static interface Sort { VxGR[kq$]
public void sort(int[] data); T#R*]
} 4B=@<(H
VWE`wan<
public static void swap(int[] data, int i, int j) { CZ/:(sOJ
int temp = data; fhQ}Z%$
data = data[j]; ?N!.:~~k
data[j] = temp; ;!/g`*?
} @RVj~J.A
} Pt%EyFG