[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; J^XH^`'
} hw7_8pAbh
int i1=l; A1@-;/H3
int i2=mid+1; -Rvxjy)[N
for(int cur=l;cur<=r;cur++){ YU"Am !
if(i1==mid+1) 226s:\d
data[cur]=temp[i2++]; &l.^UQ
else if(i2>r) @<2pYIi8
data[cur]=temp[i1++]; *p-Fn$7\n
else if(temp[i1] data[cur]=temp[i1++]; 9@j~1G%^
else ;z?XT\C$
data[cur]=temp[i2++]; 3xe8DD
} P]TT
} dnx}c4P
GGBe/X
} a~%ej.)l
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改进后的归并排序: YOY+z\Q
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package org.rut.util.algorithm.support; Ntqc=z
aw 7f$Fqk
import org.rut.util.algorithm.SortUtil; ceOjuzY
^AM_A>HnG
/** wv7jh~x(4
* @author treeroot cC[n~OV
* @since 2006-2-2 k@~-|\ooG
* @version 1.0 B -KOf
*/ -{wuF0f
public class ImprovedMergeSort implements SortUtil.Sort { 79V5{2Y*U
$i1A470C
private static final int THRESHOLD = 10; \(CW?9)
}.'%gJrS
/* miKi$jC}vq
* (non-Javadoc) AWi87q
* 1^;h:,e6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rEf\|x=st:
*/ "tark'
public void sort(int[] data) { =6dKC_Q
int[] temp=new int[data.length]; xsvs3y|
mergeSort(data,temp,0,data.length-1); 7L]?)2=
} $7r wara
Mz^s^aJEE
private void mergeSort(int[] data, int[] temp, int l, int r) { |:?.-tq
int i, j, k; KFhn}C3 i
int mid = (l + r) / 2; YfalsQ8
if (l == r) q!TbM"
return; ~Qsj)9
if ((mid - l) >= THRESHOLD) $O>@(K
mergeSort(data, temp, l, mid); +,[3a%c)H
else Rf^cw}jU
insertSort(data, l, mid - l + 1); JXAyF6 $
if ((r - mid) > THRESHOLD) hq*JQb;Y}
mergeSort(data, temp, mid + 1, r); 'k67$H
else ]Yu+M3Fq
insertSort(data, mid + 1, r - mid); _HK&KY
8?YW i
for (i = l; i <= mid; i++) { `|w#K28t"
temp = data; +m.8*^
} ) T1oDk
for (j = 1; j <= r - mid; j++) { *N r|G61
temp[r - j + 1] = data[j + mid]; >FHsZKJ
} -IS9uaT5
int a = temp[l]; /RC!Yi
int b = temp[r]; de6dLT>m
for (i = l, j = r, k = l; k <= r; k++) { 2P ?Iu&
if (a < b) { >>cd3)b
data[k] = temp[i++]; Bg h$P
a = temp; 0q>lW &J
} else { ;5k|gW
data[k] = temp[j--]; ~K96y$ DTE
b = temp[j]; )R@gnTe
} -],?kP
} gk1S"H
} orHD3T%&
5r<(Z0
/** j*u9+.
* @param data 0_ \ g
* @param l \Ji2uGT
* @param i :\JbWj_j
*/ N^]>R:Stu
private void insertSort(int[] data, int start, int len) { 4Jr[8P0/A9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X@&uu0JJ
} wKlCx
} "T u[n\8
} $0SZlq>En
} &] 6T^.
--YUiNhh
堆排序： mJ>99:W+
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package org.rut.util.algorithm.support; j2 ^T:q[
l&Ghs@>Kl
import org.rut.util.algorithm.SortUtil; )hW {>Y3x
AV4HX\`{P0
/** TY\"@(Q|G
* @author treeroot 25n(&NV
* @since 2006-2-2 'F?Znd2L
* @version 1.0 TQd FC\@f"
*/ FqxOHovE
public class HeapSort implements SortUtil.Sort{ 1GE%5
><MgIV
/* (non-Javadoc) k3[h'.ps
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w a<C*o
*/ fsc~$^.~\
public void sort(int[] data) { "ue$DyN
MaxHeap h=new MaxHeap(); #Rx"L&3Ue
h.init(data); wLN2`ucC
for(int i=0;i h.remove(); So*Wk "
System.arraycopy(h.queue,1,data,0,data.length); ,(27p6!
} ~!-8l&C
>DUE8hp;<
private static class MaxHeap{ Hq\E06S@
M|#5gKXd
void init(int[] data){ Z)i1?#
this.queue=new int[data.length+1]; ([CnYv
for(int i=0;i queue[++size]=data; x<j"DS}S)D
fixUp(size); ?U/Wio$@
} `6N-MsP
} XQJ^)d00h
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private int size=0; 8C,utjy
ObyuhAR
private int[] queue; ho]!G498
MupW=3.38
public int get() { C$td{tM
return queue[1]; 7;}3{z
} Y-3[KHD
L^Q+Q)zTh
public void remove() { ,Q=)$ `%
SortUtil.swap(queue,1,size--); Eh@T W%9*
fixDown(1); KCh
} Mev-M2A
file://fixdown zt[4_;2Y
private void fixDown(int k) { +:]Aqyc\
int j; EPe]-C`
while ((j = k << 1) <= size) { NVc!g
if (j < size %26amp;%26amp; queue[j] j++; -)OkG#J@
if (queue[k]>queue[j]) file://不用交换 B.mbKntK)R
break; aDl, K;GL
SortUtil.swap(queue,j,k); g{W6a2
k = j; blfE9Oy
} {pe7]P?
} HCx%_9xlm
private void fixUp(int k) { 'ztL3(|X6
while (k > 1) { Vo 6y8@\
int j = k >> 1; B3>Uba*-)}
if (queue[j]>queue[k]) \l]pe|0EW
break; 'y6!%k*
SortUtil.swap(queue,j,k); {y&\?'L'
k = j; a()6bRc~T
} BgkB x
} {Bq"$M!Y
Oh/b?|imG
} :q>oD-b$}
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} xZP>g
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SortUtil： 5hJYy`h~
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package org.rut.util.algorithm; yC'hwoQ`
&:DCtjK
import org.rut.util.algorithm.support.BubbleSort; y*}vG}e%
import org.rut.util.algorithm.support.HeapSort; DN"S,
import org.rut.util.algorithm.support.ImprovedMergeSort; (K*/Vp
import org.rut.util.algorithm.support.ImprovedQuickSort; &e ?"5
import org.rut.util.algorithm.support.InsertSort; UbY~xs7_
import org.rut.util.algorithm.support.MergeSort; f3zfRhkIk
import org.rut.util.algorithm.support.QuickSort; c}IX"
import org.rut.util.algorithm.support.SelectionSort; G9i&#)nWr
import org.rut.util.algorithm.support.ShellSort; $m:2&lU3
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/** [+%d3+27
* @author treeroot {1Ju}=69
* @since 2006-2-2 1 ;\]D9i
* @version 1.0 bB;~,W&E1
*/ Q7uAf3
public class SortUtil { *>aZc::
public final static int INSERT = 1; U0h)pdo
public final static int BUBBLE = 2; T2:oWjC3$
public final static int SELECTION = 3; 8tLT'2+H#
public final static int SHELL = 4; {=bg5I0|a
public final static int QUICK = 5; ]&C:>
public final static int IMPROVED_QUICK = 6; <78$]Z2we
public final static int MERGE = 7; Ha)3i{OM
public final static int IMPROVED_MERGE = 8; 3?.1~"-J
public final static int HEAP = 9; I&pr_~.
!F+|Y"c
public static void sort(int[] data) { U|Bsa(?nx
sort(data, IMPROVED_QUICK); )IFl 0<d
} ;wJ7oj<
private static String[] name={ smfG,TI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !2zo]v4?
}; dThR)Z'=
4_Qa=T8
private static Sort[] impl=new Sort[]{ q+A<g(Xu
new InsertSort(), i?GfY C2q
new BubbleSort(), a^*cZ?Ta
new SelectionSort(), <XQN;{xSa
new ShellSort(), AI1@-
new QuickSort(), :DtZ8$I`]C
new ImprovedQuickSort(), UF&0&`@
new MergeSort(), Vs_\ykO
new ImprovedMergeSort(), cWN d<=Jp
new HeapSort() MzEm*`<
}; HGO#e
!,cQ'*<W8-
public static String toString(int algorithm){ Z/2,al\
return name[algorithm-1]; 3]O`[P,*%
} MV"E?}0
jo9J%vo
public static void sort(int[] data, int algorithm) { >Z#uFt0<Pm
impl[algorithm-1].sort(data); )-bD2YA{
} 5h`m]#YEG
$}qDV> qo
public static interface Sort { %f3c7\=C
public void sort(int[] data); *QbM*oH
} Pm$F2YrO3
#4vV%S
public static void swap(int[] data, int i, int j) { `Y\gSUhzS
int temp = data; yGba
data = data[j]; F&=I7i
data[j] = temp; S~+O`y^
} U91 &|
} k2EHco0BG