[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; _svY.ps*
} F-g(Hk|v
int i1=l; Y,z15i3j?
int i2=mid+1; }6b=2Z}
for(int cur=l;cur<=r;cur++){ @1ZLr
if(i1==mid+1) C5m6{Oo+-
data[cur]=temp[i2++]; +[M5x[[$
else if(i2>r) zk= 3L} C
data[cur]=temp[i1++]; VXlTA>a }
else if(temp[i1] data[cur]=temp[i1++]; 4HEp}Y"}V
else $ KQ7S>T
data[cur]=temp[i2++]; #?L%M
} o\u31,
} -I4-K%%B`
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改进后的归并排序: f@Mm{3&.
!~PLW]Z4
package org.rut.util.algorithm.support; 10xo<@l
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import org.rut.util.algorithm.SortUtil; uSp=,2)
0p\R@{
/** }2 zJ8A9-
* @author treeroot .OA_)J7
* @since 2006-2-2 (wLzkV/6
* @version 1.0 rSDS9Vf(
*/ Rr+Y::E
public class ImprovedMergeSort implements SortUtil.Sort { o mstJ9
E8#r<=(m
private static final int THRESHOLD = 10; O{hGh{y
H)aeSF5
/* "Wd?U[[
* (non-Javadoc) \:ntqj&A|
* +V*FFv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :9!?${4R
*/ -~T?xs0_
public void sort(int[] data) { `vWFTv
int[] temp=new int[data.length]; Rg~ ~[6G>
mergeSort(data,temp,0,data.length-1); J2H/z5YRJ4
} DPR=Xls
Z=`\U?,
private void mergeSort(int[] data, int[] temp, int l, int r) { 7Wub@Mp
int i, j, k; v WKUV|
int mid = (l + r) / 2; ,W"Q)cL
if (l == r) ]5b%r;_
return; /N(L52mz
if ((mid - l) >= THRESHOLD) DP`$gd
mergeSort(data, temp, l, mid); 9Cbf[\J!bq
else =BW>jD
insertSort(data, l, mid - l + 1); mf]1mG})
if ((r - mid) > THRESHOLD) y1P KoN|K
mergeSort(data, temp, mid + 1, r); c%Ht; sK`*
else }WXO[ +l
insertSort(data, mid + 1, r - mid); qXmkeidb&W
X,d`-aKO\y
for (i = l; i <= mid; i++) { `ro~l_U;A
temp = data; m/l#hp+
} VE{[52
for (j = 1; j <= r - mid; j++) { 2OFrv=F
temp[r - j + 1] = data[j + mid]; g2p/#\D\J
} Dlhb'*@
int a = temp[l]; ~*R"WiDtI
int b = temp[r]; =w='qjh
for (i = l, j = r, k = l; k <= r; k++) { _/0vmgQ&
if (a < b) { I\J^@&JE
data[k] = temp[i++]; 9')
a = temp; y\7 -!
} else { dbF?#s~u
data[k] = temp[j--]; 3>%oGbo
b = temp[j]; )Cl!,m)~
} h ,;f6
} CC,_I>t
} |f+|OZY
0 =#)-n
/** wRu+:<o^.
* @param data & yFS
* @param l .: ~);9kj
* @param i $oKT-G
*/ w_o|k&~,
private void insertSort(int[] data, int start, int len) { O!#yPSq?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8z\v|-%Z
} Hbz>D5$
} =@w,D.5h
} !qe,&JL
} lt 74`9,f
$|~YXH~O
堆排序： \%Wu`SlDp9
RK%N:!fq=
package org.rut.util.algorithm.support; )Zx;Z[
5P{PBd}glp
import org.rut.util.algorithm.SortUtil; }T([gc7~
!bEy~.
/** yu8xTh$:
* @author treeroot ;{@ [ek6
* @since 2006-2-2 + ;u<tA
* @version 1.0 CMk0(sztU_
*/ Ak(_![Q:q\
public class HeapSort implements SortUtil.Sort{ #gjhs"$~
LU$aCw5 B;
/* (non-Javadoc) 0< i]ph
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y![m'q}K
*/ xb`,9.a7
public void sort(int[] data) { a "*DJ&
MaxHeap h=new MaxHeap(); t[>y=89
h.init(data); 05_aL` &eb
for(int i=0;i h.remove(); mI5BJ
System.arraycopy(h.queue,1,data,0,data.length); !brXQj8D7
} ?[~"$
$$my,:nH
private static class MaxHeap{ XN+~g.0
{Dv^j#
void init(int[] data){ cWG>w6FI
this.queue=new int[data.length+1]; ""LCyKu
for(int i=0;i queue[++size]=data; /W4F(3oM
fixUp(size); x\/N09
} 46U?aHKW@|
} %Ot2bhK;
Vaj4p""\F
private int size=0; sfLH[Q?
ldEZ_g^
private int[] queue; 3aMfZa<=
kGaK(^w
public int get() { 'FVh/};Y.D
return queue[1]; iF.eBL%
} j,7NLb9M
*{3&?pxx
public void remove() { HH_w!_f
SortUtil.swap(queue,1,size--); al{;]>W
fixDown(1); >0#WkmRY
} o;.6Y `-fJ
file://fixdown +kh#Jq.
private void fixDown(int k) { hqEnD
int j; Z0fl]3p
while ((j = k << 1) <= size) { =\jp%A1$
if (j < size %26amp;%26amp; queue[j] j++; ho5mH{"OV
if (queue[k]>queue[j]) file://不用交换 /^#8z(@B
break; cP >MsUZWl
SortUtil.swap(queue,j,k); L;wfTZa
k = j; @fDWp/
} 0RaE!4)!;
} :?!kZD!
private void fixUp(int k) { U g'y
while (k > 1) { O\=U'6@
int j = k >> 1; *3,GQ%~/z
if (queue[j]>queue[k]) 9XU"Ppv
break; KY1(yni&8[
SortUtil.swap(queue,j,k); v0~'`*|&
k = j; 2(_+PQ6C=
} wHGiN9A+
} Y}G9(Ci&
N>Dr z
} :/F=j;o
eB]cPo4gW
} &&(^;+
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SortUtil： ;<aT|4
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package org.rut.util.algorithm; 0?]Y^:
?Cg",k'
import org.rut.util.algorithm.support.BubbleSort; ~/R,oQ1!g}
import org.rut.util.algorithm.support.HeapSort; x,f=J4yco
import org.rut.util.algorithm.support.ImprovedMergeSort; [| \Z"
import org.rut.util.algorithm.support.ImprovedQuickSort; i)vbmV
import org.rut.util.algorithm.support.InsertSort; g{t)I0xm
import org.rut.util.algorithm.support.MergeSort; \0K3TMl)J
import org.rut.util.algorithm.support.QuickSort; H9@24NFb
import org.rut.util.algorithm.support.SelectionSort; 3LxhQVx2
import org.rut.util.algorithm.support.ShellSort; /dT7:x*
;oej~
/** X:aLed_{f
* @author treeroot K>!+5A$6i
* @since 2006-2-2 i,[S1g
* @version 1.0 :h4Nfz(
*/ In[!g
public class SortUtil { R2]2#3`
public final static int INSERT = 1; 29W~<E8K-
public final static int BUBBLE = 2; ?3f-"K_r
public final static int SELECTION = 3; :\]TAQd-
public final static int SHELL = 4; P^wDt14>
public final static int QUICK = 5; ]c67zyX=%
public final static int IMPROVED_QUICK = 6; ^)qOILn
public final static int MERGE = 7; s)gUvS\
public final static int IMPROVED_MERGE = 8; TSgfIE|
public final static int HEAP = 9; ~9[^abz
*B$$6'hi`
public static void sort(int[] data) { P(n_eIF-f
sort(data, IMPROVED_QUICK); w1#1s|
} !>n^ ;u
private static String[] name={ !Zr 9t|_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6k1;62Ntk
}; Kd<c'!
Bob K>db
private static Sort[] impl=new Sort[]{ 8c-r;DE
new InsertSort(), 'UGkL;
new BubbleSort(), .Y}~2n
new SelectionSort(), octBt`\Of
new ShellSort(), Y<lJj"G
new QuickSort(), G}B)bM2
new ImprovedQuickSort(), <-xI!o"}
new MergeSort(), m22FOjk\
new ImprovedMergeSort(), msKWb311u
new HeapSort() ,tt]C~\u
}; 4+fWIY1 "
9sQ7wlK
public static String toString(int algorithm){ #l kv&.)x
return name[algorithm-1]; 1"pvrX}
} yu ~Rk
6CoDn(+z
public static void sort(int[] data, int algorithm) { K0hmRR=
impl[algorithm-1].sort(data); B%Pg:|
} k+ Shhe1
F@</Ev
public static interface Sort { neN #Mo'A
public void sort(int[] data); Gw4~
} ]3B8D<p
{9>LF
public static void swap(int[] data, int i, int j) { H_H3Gp
int temp = data; hfUN~89;
data = data[j]; Yyl(<,Yi
data[j] = temp; 0E[&:6#Y
} [wHGt?R
} [T|_J$ ;