[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; =";G&)H-
} V_"UiN"o
int i1=l; !Y^3%B%
int i2=mid+1; &MJcLM]
for(int cur=l;cur<=r;cur++){ 88g|(k/
if(i1==mid+1) 0f9*=c
data[cur]=temp[i2++]; Cc&SHG*R
else if(i2>r) Gc*p%2c
data[cur]=temp[i1++]; Wi<g
else if(temp[i1] data[cur]=temp[i1++]; oxZXY]$y
else kG>m(n
data[cur]=temp[i2++]; ul^VGW>i
} #M@Ki1
} KybrSa
\$W\[s4I
} qW 2'?B3<
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改进后的归并排序: e]zd6{g[m
~ya@ YP]';
package org.rut.util.algorithm.support; B2T=O%
[DD#YL\P
import org.rut.util.algorithm.SortUtil; lcfX(~/m^
#,CK;h9jy!
/** "|nh=!L
* @author treeroot E'+?7ZGWj
* @since 2006-2-2 ^^(!>n6r^
* @version 1.0 d*R('0z{
*/ Xv2Q8-}w
public class ImprovedMergeSort implements SortUtil.Sort { ;i-<dAV8B
^u-;VoK
private static final int THRESHOLD = 10; 0x,NMS
pKkBAr,
/* HApjXv!U[
* (non-Javadoc) m5 l,Lxj
* .1YiNmW=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jk}Dj0o
*/ D* QZR;D#.
public void sort(int[] data) { @&9,0x
int[] temp=new int[data.length]; RfQ*`^D
mergeSort(data,temp,0,data.length-1); TxP8&!d
} LXS)(-&
ZW%;"5uVm)
private void mergeSort(int[] data, int[] temp, int l, int r) { p(fL' J
int i, j, k; XOT|:
int mid = (l + r) / 2; H>Q X?>j
if (l == r) b*TQKYT
return; w)Z-, J
if ((mid - l) >= THRESHOLD) ;.{J>Q/U,
mergeSort(data, temp, l, mid); pSdtAv
else jX&/ e'B
insertSort(data, l, mid - l + 1); 9a$ 7$4m
if ((r - mid) > THRESHOLD) g).IF.
mergeSort(data, temp, mid + 1, r); 9o+e3TXp#
else 5bo')^xa
insertSort(data, mid + 1, r - mid); w,1&s};g\
4,.[B7irR
for (i = l; i <= mid; i++) { `=P=i>,
temp = data; BPd *@l
} &\e8c g
for (j = 1; j <= r - mid; j++) { J;GYo|8
temp[r - j + 1] = data[j + mid]; ]o($No
} ")i_{C,b^
int a = temp[l]; khVfc
int b = temp[r]; ]PQ6 em
for (i = l, j = r, k = l; k <= r; k++) { O&evv8 6L
if (a < b) { MuF{STE>->
data[k] = temp[i++]; q);@iiJ-
a = temp; cCv@fks
} else { "R^0eNv$
data[k] = temp[j--]; v,Uu)Z
b = temp[j]; 1eOQ;#OV
} )-^[;:B\k"
} W%@0Ym`7
} )St`}qu;
"@UyUL
/** Dd'J"|jF38
* @param data ^\g?uH6k U
* @param l |*B9{/;4
* @param i WSqo\]
*/ .f9&.H#
private void insertSort(int[] data, int start, int len) { j5!pS xOC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =y0h\<[
} M.``o1b
} r1[#_A`Yn
} !|~yf3
} A`nzqe#(1
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堆排序： =)f5JwZPG
6r)B|~,OA
package org.rut.util.algorithm.support; yX%NFXD
Oid;s!-S6
import org.rut.util.algorithm.SortUtil; O #5`mo
/)<Xoa
/** ~(}nd
* @author treeroot +Uxtxl'
* @since 2006-2-2 ?0?+~0sI
* @version 1.0 JZ)w
*/ V|)nUsU
public class HeapSort implements SortUtil.Sort{ & Tkl-{I
ZY*_x)h+#7
/* (non-Javadoc) (97&mhs3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tZygTvK/S
*/ ^K0oJg.E
public void sort(int[] data) { OjsMT]
MaxHeap h=new MaxHeap(); _-z;
h.init(data); o'=i$Eb
for(int i=0;i h.remove(); nZ4@g@e2
System.arraycopy(h.queue,1,data,0,data.length); O'S9y
} LF ;gdF%@
Nt~G {m
private static class MaxHeap{ Da ]zbz%%
;R7+6
void init(int[] data){ UcWf O!}D
this.queue=new int[data.length+1]; }*c[}VLN
for(int i=0;i queue[++size]=data; x,Z:12H0
fixUp(size); Sr+ &
} ntn ~=oL
} /! M%9gu
>'v{o{k|C
private int size=0; $fwj8S7$
@+hO,WXN
private int[] queue; :oytJhxU
wUH:l
public int get() { ,"Nb;Yhg
return queue[1]; Kza5_7p`L
} _uZVlu@
{cmV{ 4Yx
public void remove() { dC?l%,W
SortUtil.swap(queue,1,size--); ?3do-tTp
fixDown(1); s[%@3bY!7
} rQ)I
file://fixdown :8Ugz~i
private void fixDown(int k) { m0]Lc{
int j; 1 Ay.^f
while ((j = k << 1) <= size) { KNSMx<GP
if (j < size %26amp;%26amp; queue[j] j++; $u, ~183
if (queue[k]>queue[j]) file://不用交换 < ;fI*km
break; 8r.3t\o)X
SortUtil.swap(queue,j,k); Yq%r\[%*
k = j; Ur(< ]
} %8lWJwb7u
} |z`AIScT
private void fixUp(int k) { QxiAC>%K
while (k > 1) { t]+h.
int j = k >> 1; vlPViHF.
if (queue[j]>queue[k]) UxvT|~"
break; 41c4Xj?'
SortUtil.swap(queue,j,k); cD9.L
k = j; qjH/E6GGg
} HJ!P]X_J1
} .x_F4#Ka
?-=<7 ~$
} %)=c#H1
>(Fy6m
} s\.\z[1
.`^wRpa2M
SortUtil： j5m]zh5\J=
Dj{=Y`Tw
package org.rut.util.algorithm; 'e8O \FOf
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import org.rut.util.algorithm.support.BubbleSort; EO"G(v
import org.rut.util.algorithm.support.HeapSort; V BjA$.
import org.rut.util.algorithm.support.ImprovedMergeSort; 4B@Ir)^(*
import org.rut.util.algorithm.support.ImprovedQuickSort; >uwd3XW5
import org.rut.util.algorithm.support.InsertSort; ]f*.C9Y
import org.rut.util.algorithm.support.MergeSort; JxlZ,FF$@
import org.rut.util.algorithm.support.QuickSort; v|:TYpku3
import org.rut.util.algorithm.support.SelectionSort; nw=:+?
import org.rut.util.algorithm.support.ShellSort; ZX0!BS
du&9mOrr
/** 6,(S}x YDZ
* @author treeroot R!2E`^{Wl
* @since 2006-2-2 vpoJ{TPO
* @version 1.0 14yzGhA
*/ {$'oKJy*
public class SortUtil { dyt.(2
public final static int INSERT = 1; \8]("l}ms8
public final static int BUBBLE = 2; !$#8Z".{v{
public final static int SELECTION = 3; v(^;%
public final static int SHELL = 4; &W N R{
public final static int QUICK = 5; iM~qSRb#mJ
public final static int IMPROVED_QUICK = 6; #yOn /
public final static int MERGE = 7; @O HsM?nW
public final static int IMPROVED_MERGE = 8; Gy!bPVe
public final static int HEAP = 9; h/7_IuD
Y"E*#1/
public static void sort(int[] data) { ,ZvlKN
sort(data, IMPROVED_QUICK); _nec6=S6(
} Qo+Y
private static String[] name={ wcW}Sv[r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ] jycg@=B
}; vzZ"TSP
6IKi*}
private static Sort[] impl=new Sort[]{ =6[R,{|C
new InsertSort(), ]GXE2A_i;
new BubbleSort(), PGA `R
new SelectionSort(), +g%Ah
new ShellSort(), #fxdZm,
new QuickSort(), i"#zb&~nF
new ImprovedQuickSort(), k];fQ7}m<0
new MergeSort(), JjQ9AJ?-V
new ImprovedMergeSort(), H'x_}y
new HeapSort() a@N 1"O
}; c6LPqPcN
#XeabcOQ
public static String toString(int algorithm){ LR y&/d
return name[algorithm-1]; 0yL%Pjn6
} #w;%{C[D
.>@]Im
public static void sort(int[] data, int algorithm) { xi=Qxgx0I
impl[algorithm-1].sort(data); Env_??xq
} i 8:^1rHp)
A<{&?_U
public static interface Sort { p~dj-w
public void sort(int[] data); jWh}cM=
} )<_:%oB
wg|/-q-
public static void swap(int[] data, int i, int j) { rG{,8*
int temp = data; 4?l:.\fB:
data = data[j]; XvkFP'%i/
data[j] = temp; K b z|h,<
} xN44>3#
} zOMU&;.\