[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; ekSY~z=/u
} i^z`"3#LE
int i1=l; P1zK2sL_
int i2=mid+1; !E\[SjY@J
for(int cur=l;cur<=r;cur++){ }qPhx6nP
if(i1==mid+1) 'md0]R|
data[cur]=temp[i2++]; }k$4/7ri
else if(i2>r) #TJk-1XM*q
data[cur]=temp[i1++]; eo]#sf@\0
else if(temp[i1] data[cur]=temp[i1++]; g9h(sLSF
else n(Y%Vmy
data[cur]=temp[i2++]; (il0M=M
} %oykcf,#
} &Y>zT9]$K
8|1^|B(l
} eH>#6R1-
*6ZCDm&N
改进后的归并排序: `i!wq&1g7
/ l>.mK()
package org.rut.util.algorithm.support; DtCEm(b0
`|e!Kq?#Q
import org.rut.util.algorithm.SortUtil; ~fN%WZ;_
&&8'0.M{
/** *U7%|wd
* @author treeroot 8}p8r|d!ls
* @since 2006-2-2 _cqy`p@"
* @version 1.0 Q%ad q-B
*/ .=RlOK
public class ImprovedMergeSort implements SortUtil.Sort { w; TkkDH
]TpU"JD
private static final int THRESHOLD = 10; {Q(}DI
$K}. +`vVO
/* SOh-,c\C
* (non-Javadoc) >=,uau7
* 1TJ0D_,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -e-e9uP
*/ xh9qg0d
public void sort(int[] data) { <-C!;Ce{
int[] temp=new int[data.length]; Pi6C/$ K
mergeSort(data,temp,0,data.length-1); mB55PYA
} JNU/`JN9f
TRvZ
private void mergeSort(int[] data, int[] temp, int l, int r) { d.F)9h]XHO
int i, j, k; |H)cuZ
int mid = (l + r) / 2; f[~1<;|-
if (l == r) HxwlYx,4
return; *YV S|6bs
if ((mid - l) >= THRESHOLD) b[^{)$(
mergeSort(data, temp, l, mid); *:"^[Ckc
else >%%=0!,yX
insertSort(data, l, mid - l + 1); Buc_9Kzw<+
if ((r - mid) > THRESHOLD) $~u.Wq
mergeSort(data, temp, mid + 1, r); 4jwu'7Q
else P~7.sM
insertSort(data, mid + 1, r - mid); hSV@TL
RVM&4#E
for (i = l; i <= mid; i++) { `u'dh{,gE
temp = data; !p.^ITM3S
} M@7Xp)S"
for (j = 1; j <= r - mid; j++) { D!3{gV#
temp[r - j + 1] = data[j + mid]; FvImX
} gQVBA %
int a = temp[l]; G?)vWM`j
int b = temp[r]; 2W$lQ;iO
for (i = l, j = r, k = l; k <= r; k++) { Jbw!:x [
if (a < b) { !$xu(D.
data[k] = temp[i++]; 05e>\}{0
a = temp; pdz'!I
} else { J\`^:tcG
data[k] = temp[j--]; 8C&x MA^
b = temp[j]; ZXXiL#^
} NPU^)B
} &^QPkX@p
} Ol+Kp!ocY
7sV/_3H+
/** Z7#7N wy4
* @param data sBW3{uK
* @param l rG6\ynBX%
* @param i S!dHNA:iU
*/ C3"&sdLb$
private void insertSort(int[] data, int start, int len) { R}%8s*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L,M+sN
} J_"3UZ~&
} P[i\e7mR
} sBjXE>_#)
} > V%Q O>C
qi\n]I
堆排序： *{[d%B<lp
U$J5r+>
package org.rut.util.algorithm.support; iZTa>@
Oxa5Kfpa
import org.rut.util.algorithm.SortUtil; 1uM/2sX
*.8:'F
/** R}k69-1vL
* @author treeroot a<p %hY3
* @since 2006-2-2 ~CFMIQ et
* @version 1.0 WOb8"*OM
*/ w2Kq(^?
public class HeapSort implements SortUtil.Sort{ <!!nI%NC
;1E_o
/* (non-Javadoc) rw*M&qg!z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6Ct0hk4
*/ {PmzkT}LF
public void sort(int[] data) { f\'G`4e
MaxHeap h=new MaxHeap(); PP4d?+;V
h.init(data); P#bm uCOS
for(int i=0;i h.remove(); M,G8*HI"
System.arraycopy(h.queue,1,data,0,data.length); )52#:27F
} <G9<"{
dqz1xQ1
private static class MaxHeap{ 6o(lObfo
.+uVgSN
void init(int[] data){ T#N80BH[
this.queue=new int[data.length+1]; 6vWii)O.D
for(int i=0;i queue[++size]=data; jrcc
fixUp(size); _UIgRkl.
} lb95!.av+I
} @?M;'xMbB
ir+8:./6
private int size=0; Xv&%2-V;
W U0UG$o`
private int[] queue; %&2B
N.vG]%1"
public int get() { .S(^roM;+
return queue[1]; -s33m]a;
} `W="g6(
.W-=x,`hY4
public void remove() { #'KY`&Tw&
SortUtil.swap(queue,1,size--); D/*vj|
fixDown(1); Sy:K:Z|[U
} !8Y3V/)NU
file://fixdown w4aiI2KFq
private void fixDown(int k) { 7s!AHyZ
int j; NC;T( @
while ((j = k << 1) <= size) { %'kX"}N/
if (j < size %26amp;%26amp; queue[j] j++; nE^wxtY
if (queue[k]>queue[j]) file://不用交换 U#iT<#!l2
break; p>!1S
SortUtil.swap(queue,j,k); '%:5axg?]
k = j; y^, "gD
} @X|ok*v`
} <w;D$l}u
private void fixUp(int k) { ItMl4P`|
while (k > 1) { -z&9DWH
int j = k >> 1; H]U"+52h
if (queue[j]>queue[k]) 5#P: "U
break; +6uOg,;
SortUtil.swap(queue,j,k); 1RURZoL
k = j; (tTLK0V-|3
} Mi<*6j0
} {~":;
+V6j`
} oUCS|
rffVfw
} `Nkx7Z~w:
0H;"5
SortUtil： XL=2wh
>Zi|$@7t-
package org.rut.util.algorithm; 4;08n|C
imC&pPBB/G
import org.rut.util.algorithm.support.BubbleSort; 9tW3!O^_
import org.rut.util.algorithm.support.HeapSort; $4ka +nfU
import org.rut.util.algorithm.support.ImprovedMergeSort; <<i=+ed8eP
import org.rut.util.algorithm.support.ImprovedQuickSort; 5/*)+
import org.rut.util.algorithm.support.InsertSort; AsV8k_qZL
import org.rut.util.algorithm.support.MergeSort; ,^Ex}Z
import org.rut.util.algorithm.support.QuickSort; _.u~)Q`6
import org.rut.util.algorithm.support.SelectionSort; rHH#@Zx
import org.rut.util.algorithm.support.ShellSort; =#7s+d-
>6n@\n
/** $XU-[OF%:9
* @author treeroot 0^-z?Kb<}
* @since 2006-2-2 FI80vV7
* @version 1.0 !$g(&
*/ ,oy4V^B&
public class SortUtil { F^4*|g
public final static int INSERT = 1; e&r+w!
public final static int BUBBLE = 2; +# m
public final static int SELECTION = 3; ZS07_6.~
public final static int SHELL = 4; Q&\ZC?y4
public final static int QUICK = 5; <e@I1iL37y
public final static int IMPROVED_QUICK = 6; J$o[$G_Z
public final static int MERGE = 7; ={e#lC
public final static int IMPROVED_MERGE = 8; 5<0Yh#_
public final static int HEAP = 9; HJ2O@e
XyN`BDFi
public static void sort(int[] data) { ."$=
sort(data, IMPROVED_QUICK); 9 ayH:;
} >EPaZp6
private static String[] name={ F5b]/;|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $\=6."R5<
}; ^/4{\3
c/,|[t
private static Sort[] impl=new Sort[]{ 9}7oKlyk
new InsertSort(), \H}@-*z+)
new BubbleSort(), nJnO/~|
new SelectionSort(), sZ\i(eIU
new ShellSort(), _A# x&<c
new QuickSort(), )[a?J,
new ImprovedQuickSort(), lBYS>4~
new MergeSort(), k;9#4^4(
new ImprovedMergeSort(), `qQQQ.K7)z
new HeapSort() ^$^Vd@t>a
}; vCrWA-q#
>Kqj{/SWK
public static String toString(int algorithm){ @idp8J [td
return name[algorithm-1]; ** "s~
} #&HarBxx
cc#_acR
public static void sort(int[] data, int algorithm) { J0{WqA.P
impl[algorithm-1].sort(data); 0Mzc1dG:
} Wl^/=I4p#
t2U]CI%
public static interface Sort { Amq8q
public void sort(int[] data); WHh2fN'A5
} ^Ypb"Wx8
|R|U z`
public static void swap(int[] data, int i, int j) { Ix l"'Q_z
int temp = data; n$Oky-P"
data = data[j]; =&<$I
data[j] = temp; =Am*$wGI
} s`{#[&[
} ~P.-3