[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; r^tXr[}
} = (h;L$
int i1=l; VKJ~ZIO@A
int i2=mid+1; ^9f`3~!#bc
for(int cur=l;cur<=r;cur++){ 6XCX#4'i%
if(i1==mid+1) w\;9&;;
data[cur]=temp[i2++]; *SG2k .$
else if(i2>r) FveK|-
data[cur]=temp[i1++]; bFxJ|
else if(temp[i1] data[cur]=temp[i1++]; ex!wY
else 8!`.%)- 4
data[cur]=temp[i2++]; adPU)k_j:
} rQ@o
} cb&In<q
Zgf||,
} bRe*(
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改进后的归并排序: Dj&bHC5%
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package org.rut.util.algorithm.support; E/-Kd!|"
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import org.rut.util.algorithm.SortUtil; MxA'T(Ay
^* v{t?u
/** "X}F%:HL
* @author treeroot $P9$ ,w4
* @since 2006-2-2 `V2j[Fz
* @version 1.0 6i=wAkn_J
*/ pXEVI6 }
public class ImprovedMergeSort implements SortUtil.Sort { gJ~*rWBK:
U$J_:~
private static final int THRESHOLD = 10; s31_3?Vdf,
4zDAfi#0
/* ;m:GUp^[
* (non-Javadoc) I{ZPv"9j^
* Zd/~ *ZA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >w;W&[
*/ 0$Db@
public void sort(int[] data) { *(.^$Iq4
int[] temp=new int[data.length]; :=7;P)
mergeSort(data,temp,0,data.length-1); Ywq+l]5/p
} BjJ gQ`X
[ +@<T)
private void mergeSort(int[] data, int[] temp, int l, int r) { Lk+1r8
int i, j, k; Jm,X~Si
int mid = (l + r) / 2; aT1W]i
if (l == r) fx"+ZR
return; #IA(*oM
if ((mid - l) >= THRESHOLD) qinQ5t
mergeSort(data, temp, l, mid); !+ hgKZ]
else t[ocp;Q
insertSort(data, l, mid - l + 1); T mE4p
if ((r - mid) > THRESHOLD) !h(0b*FUJ
mergeSort(data, temp, mid + 1, r); UimZ/\r
else pg`;)@
insertSort(data, mid + 1, r - mid); ~i#xjD5
l:/V%{sx
for (i = l; i <= mid; i++) { V]cY+4Y
temp = data; F=c_PQO
} ?kefRev<#h
for (j = 1; j <= r - mid; j++) { R6.#gb8^oS
temp[r - j + 1] = data[j + mid]; +34jot.!
} )BrqE uX@"
int a = temp[l]; 3`q`W9
int b = temp[r]; oob0^}^
for (i = l, j = r, k = l; k <= r; k++) { j2n@8sCSO
if (a < b) { 0t0:soZx
data[k] = temp[i++]; 2xj`cFT
a = temp; ts$UC $
} else { G\AQql(f4
data[k] = temp[j--]; H<?yG->
b = temp[j]; 55KL^+-~
} haK5Oe/cE
} IsL/p3|
} :|Ty 0>k
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/** 8{e 3
* @param data ;S j* {
* @param l 0P >dXd)T
* @param i yln.E vJjD
*/ E:OeU_\
private void insertSort(int[] data, int start, int len) { \H12~=p`B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); en":
} Lj,%pzJ
} @SB+u+mOS
} r\`m[Q
} A+8b]t_k
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堆排序： LvdMx]*SSr
@h3)!#\N
package org.rut.util.algorithm.support; ri`|qy6! |
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import org.rut.util.algorithm.SortUtil; !d_A?q'hN
PdnK@a
/** 8~>3&jX
* @author treeroot e/Y+S;a
* @since 2006-2-2 x{5*%}lX8
* @version 1.0 i i Y[
*/ Yw `VL)v(y
public class HeapSort implements SortUtil.Sort{ z<*]h^!3
'M/&bu r
/* (non-Javadoc) >fQN"(tf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fXj
*/ {}e IpK,+
public void sort(int[] data) { AG2jl/
MaxHeap h=new MaxHeap(); c5pG?jr+d
h.init(data); u6RHn;b
for(int i=0;i h.remove(); H_]kR&F8
System.arraycopy(h.queue,1,data,0,data.length); (1vS)v $L
} #\QC%"%f
voEc'JET
private static class MaxHeap{ mD3#$E!A1
WFG/vzJ
void init(int[] data){ @RW%EXKt
this.queue=new int[data.length+1]; 4Rq"xYGXh
for(int i=0;i queue[++size]=data; RPwSo.c4
fixUp(size); Cv33?l-8%_
} *^()el,d
} ]ghPbS@
$la,_Sr
private int size=0; Y.J$f<[R
~~mQ
private int[] queue; C? S%fF
*1Q?~
public int get() { GYO"1PM
return queue[1]; 9:s!#FYFM
} ;{RQ+ZX'[
db|$7]!w
public void remove() { IZLX[y
SortUtil.swap(queue,1,size--); $-73}[UA 4
fixDown(1); .rHO7c,P~
} Dlp::U*N'
file://fixdown X,~C&#
private void fixDown(int k) { pm+[,u!i
int j; r>\.b{wI
while ((j = k << 1) <= size) { X +R_TC
if (j < size %26amp;%26amp; queue[j] j++; NT'Yh
if (queue[k]>queue[j]) file://不用交换 e6Y0G,K
break; sKtH4d5)
SortUtil.swap(queue,j,k); >b0}X)Z+U
k = j; }<p%PyM
} I]58;|J
} L 'y+^L|X
private void fixUp(int k) { %o>1$f]
while (k > 1) { q_bB/
int j = k >> 1; 7JbrIdDl|
if (queue[j]>queue[k]) =zdRoXBY[b
break; A7se#"w
SortUtil.swap(queue,j,k); O#g31?TO
k = j; ~Q5HM
} Wp $\>
} *&s_u)b
V!p;ME
} R4?/7
ja2LXM
} A]1](VQ)4
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SortUtil： udMq>s;
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package org.rut.util.algorithm; ~9=g"v
V.qB3V$
import org.rut.util.algorithm.support.BubbleSort; %y'#@%kO:S
import org.rut.util.algorithm.support.HeapSort; 'tekne
import org.rut.util.algorithm.support.ImprovedMergeSort; xQ4Q'9
import org.rut.util.algorithm.support.ImprovedQuickSort; P:G^@B3^
import org.rut.util.algorithm.support.InsertSort; @xo9'M<l
import org.rut.util.algorithm.support.MergeSort; :7gIm|2"]
import org.rut.util.algorithm.support.QuickSort; gU:jx
import org.rut.util.algorithm.support.SelectionSort; q4{ 6@q
import org.rut.util.algorithm.support.ShellSort; {.v+ iSM
t5S S]
/** ~_Aclm?
* @author treeroot S[Et!gj:
* @since 2006-2-2 d}1R<Q;F
* @version 1.0 tG'c79D\
*/ !U@[lBW
public class SortUtil { ^c*'O0y[D
public final static int INSERT = 1; WE\V<MGS/
public final static int BUBBLE = 2; B--`=@IRf"
public final static int SELECTION = 3; t2>Vj>U
public final static int SHELL = 4; BO^e.iB/
public final static int QUICK = 5; (c;$^xZK
public final static int IMPROVED_QUICK = 6; ;tO(,^
public final static int MERGE = 7; IsI\T8yfc
public final static int IMPROVED_MERGE = 8; xGjEEBL
public final static int HEAP = 9; [dL#0~CL$
Gmc0yRN
public static void sort(int[] data) { /J^yOR9
sort(data, IMPROVED_QUICK); O3S_P]{*ny
} mU;TB%#)
private static String[] name={ yA~W|q(/V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N7XRk=J
}; Y:O%xtGi
{=TD^>?
private static Sort[] impl=new Sort[]{ YkTEAI|i
new InsertSort(), h<[o;E
new BubbleSort(), ^XV$J-
new SelectionSort(), ^j@,N&W:lG
new ShellSort(), <S<(wFE@4
new QuickSort(), >>p3#~/
new ImprovedQuickSort(), tcfUhSz,I
new MergeSort(), Y>r9"X|&H
new ImprovedMergeSort(), IYd)Vv3'j
new HeapSort() fN@2 B
}; ydw')Em
{$b]K-B
public static String toString(int algorithm){ e(sQgtM6
return name[algorithm-1]; oE}1D?3Sp
} E}UlQq
ip~PF5
public static void sort(int[] data, int algorithm) { 1Nv_;p.{
impl[algorithm-1].sort(data); K*>lq|iu
} 6tVB}UKs
uGOvZO^v
public static interface Sort { ]w({5i
public void sort(int[] data); Y<l{DmrsA
} |iJ37QIM
S7@.s`_{w
public static void swap(int[] data, int i, int j) { G0^NkH,k
int temp = data; 0GEK xV\F
data = data[j]; jvA]EN6$;~
data[j] = temp; HKV]Rn
} lCDXFy(E
} (h%!Kun