[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; |D1TSv}rZD
} ;]T;mb>
int i1=l; Nq#B4Zx
int i2=mid+1; 98lz2d/Fcq
for(int cur=l;cur<=r;cur++){ N;* wd<
if(i1==mid+1) #O!gjZ,
data[cur]=temp[i2++]; uEr['>
else if(i2>r) ilwIqj
data[cur]=temp[i1++]; /.Jq]"
else if(temp[i1] data[cur]=temp[i1++]; 5-POYug
else w/@ tH
data[cur]=temp[i2++]; cnj32H^+
} j{Sbf04
} *@g>~q{`
a6 w'.]m
} 15M!erT
h/..cVD,K
改进后的归并排序: ))E| SAr
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package org.rut.util.algorithm.support; ~;0W +
w6|l ~.$=
import org.rut.util.algorithm.SortUtil; H Yw7*
YD] :3!MI
/** 8BX9JoDi
* @author treeroot EKNmXt1 lE
* @since 2006-2-2 G x{G}9
* @version 1.0 +f'@
*/ KU;J2Kt
public class ImprovedMergeSort implements SortUtil.Sort { Pp`[E/ qj4
*&~ '
private static final int THRESHOLD = 10; r;GAQH}j_
R6\|:mI,$
/* op61-:q/
* (non-Javadoc) _Q7]Dw/w\
* ow*^z78M{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QI`&N(n
*/ +<fT\Oq#
public void sort(int[] data) { @s|yH"
int[] temp=new int[data.length]; JN3&(t
mergeSort(data,temp,0,data.length-1); \6;b.&%w2
} YqYobL*q/
/}nq?Vf
private void mergeSort(int[] data, int[] temp, int l, int r) { B* k|NZj
int i, j, k; Ted!*HKlB
int mid = (l + r) / 2; 'SKq<X%R;
if (l == r) &90pKs
return; *kt%.wPJ
if ((mid - l) >= THRESHOLD) n,Q^M$mS0
mergeSort(data, temp, l, mid); "s7}eWM*a
else rN`-ak
insertSort(data, l, mid - l + 1); =4K:l}}
if ((r - mid) > THRESHOLD) \omfWWpK
mergeSort(data, temp, mid + 1, r); 3W}qNY;J
else [uFv_G{H
insertSort(data, mid + 1, r - mid); + De-U.
mX GW+
for (i = l; i <= mid; i++) { NGkWr
temp = data; D:PrFa
} lQG;WVqW
for (j = 1; j <= r - mid; j++) { /~P4<1
temp[r - j + 1] = data[j + mid]; ;TboS-Y
} L6J.^tpO
int a = temp[l]; 0[ZwtfL1
int b = temp[r]; jV(b?r)eT{
for (i = l, j = r, k = l; k <= r; k++) { !jRs5{n^Ol
if (a < b) { 51`*VR]`K
data[k] = temp[i++]; GP_%.fO\M
a = temp; j4$NQ]e^4
} else { G@rV9
data[k] = temp[j--]; \{ff7_mLo
b = temp[j]; Qk].^'\
} 3#Xv))w1
} '[Bok=$B)
} B0,C!??5
" l>tFa
/** 9''x'E=|
* @param data K.42 VM)F
* @param l +7j7zpw
* @param i ab>>W!r@!
*/ q=;U(,Y
private void insertSort(int[] data, int start, int len) { 4']eJ==OH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `9nk{!X\
} ,AyQCUz{*?
} bkIQ?cl<at
} p s_o:*$l
} nI,-ftMD-|
3Cg0^~?6-
堆排序： X"S")BQ q
wPr!.:MF
package org.rut.util.algorithm.support; U^&y*gX1
sH :_sOV*
import org.rut.util.algorithm.SortUtil; =|IY[2^
D()tP
/** Ummoph7_@
* @author treeroot /8LTM|(
* @since 2006-2-2 7rIEpN>*
* @version 1.0 [wM]w
*/ \)2~oN
public class HeapSort implements SortUtil.Sort{ 2I0Zr;\f
[cw>; \J
/* (non-Javadoc) 0w?G&jjNtM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IV|})[n*
*/ }!jn%@_y@
public void sort(int[] data) { sEcg;LFp
MaxHeap h=new MaxHeap(); y#-~L-J_R
h.init(data); (RI+4V1
for(int i=0;i h.remove(); *iXaQuT
System.arraycopy(h.queue,1,data,0,data.length); G>S3?jGk
} $mut v=IO
ZW`wA2R0
private static class MaxHeap{ b:W x[+
Wrs6t
void init(int[] data){ UI74RP
this.queue=new int[data.length+1]; 9&'HhJm
for(int i=0;i queue[++size]=data; M Jtn)gXb
fixUp(size); pRFlmg@/}
} .t$1B5
} %KW NY(m
JjnWv7W3$
private int size=0; 3/EJ^C
c>L#(D\\
private int[] queue; #P;vc{ Iq
xs$.EY:k
public int get() { h:{^&d a
return queue[1]; KfV&7yi
} ]DLs'W;)
&eWnS~hJ
public void remove() { I$JyAj
SortUtil.swap(queue,1,size--); 1|oE3
fixDown(1); @%rj1Gn
} F3&:KZ!V&m
file://fixdown 3'6by!N,d
private void fixDown(int k) { +"JQ5~7
int j; c[;=7-+
while ((j = k << 1) <= size) { 5IFc"
if (j < size %26amp;%26amp; queue[j] j++; W>J1JaO
if (queue[k]>queue[j]) file://不用交换 /R[PsB
break; @+; cFj
SortUtil.swap(queue,j,k); 17yg ~
k = j; {/K!cPp9
} n[
} ?EA&kZR]
private void fixUp(int k) { o;'-^ LJ
while (k > 1) { -'RD%_
int j = k >> 1; nVGWJ3
if (queue[j]>queue[k]) /[UuHU5*R
break; drh,=M\F
SortUtil.swap(queue,j,k); Zl{DqC^
k = j; Jb]22]
} $QJ,V~
} ~uh,R-Q$
hXQo>t-$
} ANXN.V
rwY{QBSf
} mZ4I}_\,
fx= %e
SortUtil： |eH*Q%M
a'B 5m]%
package org.rut.util.algorithm; f^ 6da6Z
;N!W|G
import org.rut.util.algorithm.support.BubbleSort; bC%}1wwh
import org.rut.util.algorithm.support.HeapSort; jQY^[A
import org.rut.util.algorithm.support.ImprovedMergeSort; Qd"u$~ qC
import org.rut.util.algorithm.support.ImprovedQuickSort; },vVc/
import org.rut.util.algorithm.support.InsertSort; <O9.GHV1v
import org.rut.util.algorithm.support.MergeSort; KAm$^N5
import org.rut.util.algorithm.support.QuickSort; @rxfOc0J#
import org.rut.util.algorithm.support.SelectionSort; uG7ll5Yy
import org.rut.util.algorithm.support.ShellSort; 'cvc\=p
Gkz~xQy1T
/** b"&1l2\ A
* @author treeroot ~A-VgBbU>_
* @since 2006-2-2 e(Ub7L#
* @version 1.0 T``~YoIdz
*/ Fn*)!,)
public class SortUtil { fg~9{1B
public final static int INSERT = 1; (Q ~<>
public final static int BUBBLE = 2; CO.e.:h
public final static int SELECTION = 3; Q)l~?Fx
public final static int SHELL = 4; Ub<^;Du5
public final static int QUICK = 5; If%**o
public final static int IMPROVED_QUICK = 6; )}5f'TK
public final static int MERGE = 7; P>;uS
public final static int IMPROVED_MERGE = 8; +u'y!@VV
public final static int HEAP = 9; K 6HH_T
pQOT\- bD
public static void sort(int[] data) { C}cYG
sort(data, IMPROVED_QUICK); 9$e6?<`(Y
} 1JO@G3,
private static String[] name={ ^%2S,3*0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qjVhBu7A
}; HLp'^
_U/CG<n
private static Sort[] impl=new Sort[]{ ICXz(?a
new InsertSort(), iXFN|ml
new BubbleSort(), N.qS;%*o{e
new SelectionSort(), .T }q"
new ShellSort(), g)#.|d+
new QuickSort(), L'$;;eM4
new ImprovedQuickSort(), %!QY:[
new MergeSort(), L$<(HQQJ8
new ImprovedMergeSort(), &P3ep[]j
new HeapSort() Ncle8=8
}; XoqmT/P
_^cFdP)8|
public static String toString(int algorithm){ =K\.YKT
return name[algorithm-1]; $09PZBF,i
} O^yDb
3QO*1P@q
public static void sort(int[] data, int algorithm) { 5Bog\mS
impl[algorithm-1].sort(data); #ZvDf5A
} !BikqTM
[^GXHE=
public static interface Sort { X6lUFko
public void sort(int[] data); @E@5/N6M
} CPS1b
z'd*z[L~
public static void swap(int[] data, int i, int j) { (jB_uMuS
int temp = data; tOf18V{a
data = data[j]; cl3Dwrf?
data[j] = temp; ~G*eJc0S:
} T~(AXwaJ
} 3 h~U)mg