[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; LiHXWi{s
} r`mzsO-'
int i1=l; +ik N) D
int i2=mid+1; ]8q%bsl+
for(int cur=l;cur<=r;cur++){ ]ci|$@V
if(i1==mid+1) (<5'ceF)X
data[cur]=temp[i2++]; ]9~#;M%1
else if(i2>r) <+mO$0h"r
data[cur]=temp[i1++]; 5jj57j"
else if(temp[i1] data[cur]=temp[i1++]; %oSfL;W7
else N?`GZ+5
data[cur]=temp[i2++]; 6i?kkULBS
} 52q!zx E
} q(${jz4w
K7d1(.
} HeAc(_=C
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改进后的归并排序: $)i"[
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package org.rut.util.algorithm.support; FrE/K_L
e-T9HM&%P
import org.rut.util.algorithm.SortUtil; fu7[8R"{
;#Crh}~
/** QtO[g
* @author treeroot M\$<g
* @since 2006-2-2 }!J/ 9WKgU
* @version 1.0 |~T+f&
*/ w-q=.RSTn=
public class ImprovedMergeSort implements SortUtil.Sort { CsQ}P)
_#\5]D~""
private static final int THRESHOLD = 10; z;@S_0M,Z
@?($j)9}
/* 3`C3+
* (non-Javadoc) ~jrU#<'G9
* y|2g"J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iR4,$Nn>
*/ R.n`R|NOd
public void sort(int[] data) { 5Dh&ez`oR'
int[] temp=new int[data.length]; $(<*pU
mergeSort(data,temp,0,data.length-1); -^SD6l$
} )I0g&e^Tzy
n B|C-.F
private void mergeSort(int[] data, int[] temp, int l, int r) { ROI$;B(
int i, j, k; 4tN~UMw?
int mid = (l + r) / 2; "MVN/Gl
if (l == r) DQHGq_unP
return; T=)L5Vuq<
if ((mid - l) >= THRESHOLD) #7E&16Fk
mergeSort(data, temp, l, mid); H6+st`{
else BRQ5
insertSort(data, l, mid - l + 1); )F9V=PJE
if ((r - mid) > THRESHOLD) ;-P:$zw9c
mergeSort(data, temp, mid + 1, r); M. UUA?d<'
else vA $BBXX
insertSort(data, mid + 1, r - mid); {UjIxV(J
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for (i = l; i <= mid; i++) { ,'@ISCK^
temp = data; '\3.isTsx
} DW;.R<8
for (j = 1; j <= r - mid; j++) { J1wGK|F~
temp[r - j + 1] = data[j + mid]; %>QSeX
} e[Ul"pMvS`
int a = temp[l]; l=.InSuLT
int b = temp[r]; DyV[+P
for (i = l, j = r, k = l; k <= r; k++) { (j\UoKLRt
if (a < b) { TTjjyZ@
data[k] = temp[i++]; )}k`X<~k
a = temp; Vt 5XC~jK
} else { m:o$|7r
data[k] = temp[j--]; aG&kl O>m
b = temp[j]; Z_TbM^N
} @eD2<e
} W71#NjM2Z
} ;R-Q,aCM}
u=?P*Y/|W
/** X$Qi[=L
* @param data vzQmijr-
* @param l Lw78v@dY
* @param i dYttse'
*/ /-} p7AM
private void insertSort(int[] data, int start, int len) { /:];2P6#X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q.Aw!]:!
} Nl>b'G96
} 7B>cmi
} pLFL6\{g
} @;-Un/'C;7
b+fy&rk@-
堆排序： >Sl:Z ,g;
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package org.rut.util.algorithm.support; y#SD-#I-
u K&_IE}
import org.rut.util.algorithm.SortUtil; t`/RcAwA
GVPEene
/** 7*W$GCd8
* @author treeroot SX94,5 _Q
* @since 2006-2-2 4rCqN.J
* @version 1.0 e2H'uMy;&
*/ XT;IEZQZ
public class HeapSort implements SortUtil.Sort{ 7UnO/K7oB.
v?iH}7zb%Q
/* (non-Javadoc) CX(yrP6;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `E%d$
*/ x[<#mt
public void sort(int[] data) { ^.aEKr
MaxHeap h=new MaxHeap(); >WG91b<Xq
h.init(data); dJgOfg^
for(int i=0;i h.remove(); GAe_Z(T
System.arraycopy(h.queue,1,data,0,data.length); 4zvU"np
} F;l<>|vG
9n2%7dLQ*
private static class MaxHeap{ %.}
%1l80Z
void init(int[] data){ Y@xeyMzE
this.queue=new int[data.length+1]; q>h+Ke
for(int i=0;i queue[++size]=data; .ceU @^
fixUp(size); Ptxc9~k
} P<oD*C
} &Fr68HNmj
fXR_)d
private int size=0; )=y6s^}
|Szr=[
private int[] queue; ~.=HN}E
rY+1s^F
public int get() { |0Ug~jKU
return queue[1]; <qZ+U4@I)
} faeyk]u
8&iI+\lCy
public void remove() { ))-M+CA
SortUtil.swap(queue,1,size--); Yl3PZ*#@ Q
fixDown(1); CF 0IP
} /-9+(
file://fixdown "PP0PL^5F
private void fixDown(int k) { hndRgCo
int j; bGLp0\0[
while ((j = k << 1) <= size) { >.sN?5}y
if (j < size %26amp;%26amp; queue[j] j++; ?v*7!2;
if (queue[k]>queue[j]) file://不用交换 :l[Q
break; U-N/Z\QD
SortUtil.swap(queue,j,k); b-gVRf#F
k = j; Ol^EQLO
} 9O_N iu0
} QE6-(/
private void fixUp(int k) { --hnv/AjI
while (k > 1) { ?a_q!,8:
int j = k >> 1; vWga>IGM
if (queue[j]>queue[k]) LU=)\U@Q
break; f*@:{2I.v
SortUtil.swap(queue,j,k); Z1}zf(JU
k = j; ooxzM `
} "+Yn;9
} _\6(4a`,
M?CMN.Dw
} ph+tk5k
tOVm~C,R
} 0(6`dr_
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SortUtil： 3Q"+ #Ob
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package org.rut.util.algorithm; smS0Rk
M)RQIl5
import org.rut.util.algorithm.support.BubbleSort; nlnJJM&J$
import org.rut.util.algorithm.support.HeapSort; M- A}(r +J
import org.rut.util.algorithm.support.ImprovedMergeSort; 55en D
import org.rut.util.algorithm.support.ImprovedQuickSort; =&xoyF
import org.rut.util.algorithm.support.InsertSort; <08V-
import org.rut.util.algorithm.support.MergeSort; Kt0Tuj@CY
import org.rut.util.algorithm.support.QuickSort; 0u9h2/ma
import org.rut.util.algorithm.support.SelectionSort; BGjTa.&
import org.rut.util.algorithm.support.ShellSort; |ZzBCL8q
nAj2k
/** tS@/Bq('B
* @author treeroot D'+8]B
* @since 2006-2-2 >C66X?0cd
* @version 1.0 1W7BN~p14
*/ ~;s)0M
public class SortUtil { 00TdX|V`
public final static int INSERT = 1; 6S&YL
public final static int BUBBLE = 2; |`/uS;O
public final static int SELECTION = 3; m^+~pC5
public final static int SHELL = 4; 9jO+ew
public final static int QUICK = 5; U$Z}<8
public final static int IMPROVED_QUICK = 6; oa7Hx<Y
public final static int MERGE = 7; MPc=cLv
public final static int IMPROVED_MERGE = 8; uwzT? C A6
public final static int HEAP = 9; K>6p5*&
p$<qT^]&
public static void sort(int[] data) { a06q-3zw
sort(data, IMPROVED_QUICK); %tLq&tyeY
} Jp0.h8i
private static String[] name={ jXR+>=_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R:p,Hav<q
}; g{(nt5|^l
x~^nlnKVf
private static Sort[] impl=new Sort[]{ WGK::?
new InsertSort(), *RM'0[1F4
new BubbleSort(), Uc2#so$9
new SelectionSort(), Z;s-t\C
new ShellSort(), g&wQ^
new QuickSort(), v,B\+q/
new ImprovedQuickSort(), _Y=yR2O
new MergeSort(), h#nQd=H<g#
new ImprovedMergeSort(), q"oNB-bz
new HeapSort() ]^<~[QK_C
}; W@=ilW3RD
tT:yvU@a
public static String toString(int algorithm){ mws.)
return name[algorithm-1]; A@r,A?(
} $Plk4 o*g
Tkf !Y?
public static void sort(int[] data, int algorithm) { yL-L2
impl[algorithm-1].sort(data); X;tk\Ixd
} E .5xzY
}XU- JAn
public static interface Sort { ^eii 4
public void sort(int[] data); 8EA?'~"
} IgL8u
*Y~64FM
public static void swap(int[] data, int i, int j) { Po3W+;@
int temp = data; f_8~b0`
data = data[j]; jEIL(0_H
data[j] = temp; yW 3h_08
} 0b'R5I.M
} t,_[nu(~8%