[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; ^fK8~g;rB
} I]SR.Yp%
int i1=l; vA`[#(C
int i2=mid+1; 5@[%P=
for(int cur=l;cur<=r;cur++){ }sJ%InL
if(i1==mid+1) }f&7<E
data[cur]=temp[i2++]; )CR8-z1`
else if(i2>r) 3%EwA\V(
data[cur]=temp[i1++]; 1b|<
else if(temp[i1] data[cur]=temp[i1++]; #s yP=
else HqYaQ~Dth
data[cur]=temp[i2++]; ;o^m"I\y
} G#@<bg3
} ;k/0N~
#i2q}/w5`C
} :L`z~/6
^* DKF
改进后的归并排序: :+Dn]:\
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package org.rut.util.algorithm.support; 3&' STPpW
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import org.rut.util.algorithm.SortUtil; G$@X>)2N8
82/iVm1
/** K=(&iq!VO
* @author treeroot }|SVt`n
* @since 2006-2-2 #UWQ (+F
* @version 1.0 6@F Z,e
*/ 3"L$*toRA
public class ImprovedMergeSort implements SortUtil.Sort { @XIwp2A{+
'.kbXw0}
private static final int THRESHOLD = 10; *;gi52tM
?,%N?
/* HYg_{
* (non-Javadoc) xD1wHp!+
* HKxrBQr78
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UVI=&y]c,p
*/ "R9kF-
public void sort(int[] data) { H`io|~Q
int[] temp=new int[data.length]; in+`zfUJ9
mergeSort(data,temp,0,data.length-1); {?L}qV
} [e^i".
^9{ 2
private void mergeSort(int[] data, int[] temp, int l, int r) { v#/,,)m
int i, j, k; 6|jE3rHw
int mid = (l + r) / 2; M]_vb,=1
if (l == r) z.H`a+cl
return; qob!!A14p
if ((mid - l) >= THRESHOLD) d,0pNav)
mergeSort(data, temp, l, mid); A23Z)`
else )7`~U"r
insertSort(data, l, mid - l + 1); 0>?mF]M
if ((r - mid) > THRESHOLD) ~~fL`"
mergeSort(data, temp, mid + 1, r); ?b7vc^E&
else gTQ6B,`/8
insertSort(data, mid + 1, r - mid); Xs?>6i@$$
rU~"A
for (i = l; i <= mid; i++) { GYs4#40
temp = data; 4%6Q+LS']Q
} 1bDc ct
for (j = 1; j <= r - mid; j++) { ePY K^D
temp[r - j + 1] = data[j + mid]; ~ZDdzp>
} tllg$CQ5
int a = temp[l]; qzmZ/z96
int b = temp[r]; #tfJ?w`
for (i = l, j = r, k = l; k <= r; k++) { ypifXO;m7
if (a < b) { 7SM/bJ-M#
data[k] = temp[i++]; 6/n;u{|
a = temp; mcR!P~"i
} else { k/mY. 2yPv
data[k] = temp[j--]; V\xQM;
b = temp[j]; 0ib 6}L%
} Pb`sn5;
} #,9|Hr%
} bQ4 }no0
a&cV@~
/** w##Fpv<m
* @param data (#,.;Y
* @param l v|'N|k l
* @param i {38aaf|'/
*/ .5z|g@ 6
private void insertSort(int[] data, int start, int len) { ZuhT \l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !3&}r
} h}d7M55#|
} G?g7G,|d
} Z:OO|x
} KWYG\#S0]
^49moC-
堆排序： 8]L.E
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package org.rut.util.algorithm.support; ?t"PawBWE
3HiW1*5W
import org.rut.util.algorithm.SortUtil; lt]U?VZ
p?h;Sv/
/** INT2i8oU
* @author treeroot zJy{Ry[Sb
* @since 2006-2-2 W | }Hl{}
* @version 1.0 `sXx,sV?B
*/ 0T5>i 0/
public class HeapSort implements SortUtil.Sort{ 7lpVK]
u rOGOa$
/* (non-Javadoc) .G]# _U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gdT_kb5HL8
*/ vP2QAGk<
public void sort(int[] data) { !L_ SHlU
MaxHeap h=new MaxHeap(); uj@<_|7
h.init(data); -a[{cu{
for(int i=0;i h.remove(); &|4Uo5qS=Z
System.arraycopy(h.queue,1,data,0,data.length); LNb![Rq
} 4tU~ ^z
Y[DKj!v
private static class MaxHeap{ ,+RO 5n
1L|(:m+
void init(int[] data){ ? `KOW
this.queue=new int[data.length+1]; ..:V3]-D
for(int i=0;i queue[++size]=data; S#9SAX [
fixUp(size); [:'n+D=T3M
} C"{on%
} (D{}1sZBQ
#.)>geLC>9
private int size=0; l.juys8s
85 hYYB0v
private int[] queue; jJvNN -^
6Ts`5$e
public int get() { -(.7/G'Vk>
return queue[1]; 57>ne)51
} _XZ=4s
{+:XVT_+
public void remove() { o0L#39`'g
SortUtil.swap(queue,1,size--); A]9JbNV
fixDown(1); bAiw]xi
} {p 0'Lc<3n
file://fixdown B>ZPn6?y
private void fixDown(int k) { A&F4;>dms
int j; q@9i3*q;
while ((j = k << 1) <= size) { mmL~`i/
if (j < size %26amp;%26amp; queue[j] j++; ;Y^RF?un
if (queue[k]>queue[j]) file://不用交换 <^Tj}5)n
break; m #QI*R XP
SortUtil.swap(queue,j,k); *F*X_O
k = j; ;%<4U^2
} Y,yaB)&Ih
} @45H8|:k
private void fixUp(int k) { [u80-x<
while (k > 1) { (do=o&9pm
int j = k >> 1; hhGpB$A
if (queue[j]>queue[k]) H\mVK!](D
break; %#9~V
SortUtil.swap(queue,j,k); YkPt*?,P/
k = j; E+zn\v
} fJ2{w[ne
} 3L?a4,Q"k}
GuWBl$|+b
} fm>K4\2
]F;]<_
} 2hJ3m+N^
,~xU>L^
SortUtil： ssITe.,ny
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package org.rut.util.algorithm; g{hA,-3
[Z\1"m
import org.rut.util.algorithm.support.BubbleSort; ?w/nZQWi
import org.rut.util.algorithm.support.HeapSort; .~L4#V{c~
import org.rut.util.algorithm.support.ImprovedMergeSort; zI!R-Nb
import org.rut.util.algorithm.support.ImprovedQuickSort; *hs<Ez.cC
import org.rut.util.algorithm.support.InsertSort; v6?\65w,|
import org.rut.util.algorithm.support.MergeSort; m1i+{((
import org.rut.util.algorithm.support.QuickSort; yQ{_\t1Wd
import org.rut.util.algorithm.support.SelectionSort; [9om"'
import org.rut.util.algorithm.support.ShellSort; /'6[*]IZP
lhl0
/** Ko)T>8:
* @author treeroot T zYgH
* @since 2006-2-2 NB5B$q_'#
* @version 1.0 -_DiD^UcXn
*/ ;}~Bv<#
public class SortUtil { Z4ov
public final static int INSERT = 1; So%1RY{)
public final static int BUBBLE = 2; G@EjWZQ
public final static int SELECTION = 3; sFCs_u1tNN
public final static int SHELL = 4; j :Jdwf
public final static int QUICK = 5; !a(qqZ|s
public final static int IMPROVED_QUICK = 6; 0Y*gJ!a
public final static int MERGE = 7; {mnSTL`
public final static int IMPROVED_MERGE = 8; dG>Wu o
public final static int HEAP = 9; 8/?uU]#Q
l=~99mE
public static void sort(int[] data) { `OReSg 2
sort(data, IMPROVED_QUICK); %GCd?cFF
} D.R|HqZ
private static String[] name={ 8sF0]J[g{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;To+,`?E;q
}; UN?T}p- oF
C%?D E@k
private static Sort[] impl=new Sort[]{ {_ho!OS>
new InsertSort(), {C0^D*U:
new BubbleSort(), "rDzrz
new SelectionSort(), }_:#fE
new ShellSort(), =tRe3o0(
new QuickSort(), lEbR)B,
new ImprovedQuickSort(), ilcy/
new MergeSort(), 1qKxg
new ImprovedMergeSort(), k>;r9^D
new HeapSort() t>GLZzO
}; 'a/6]%QFd!
H&=4y) /.
public static String toString(int algorithm){ h9w^7MbO
return name[algorithm-1]; 1\J1yOL
} }:l%,DBw
5YG@[ic
public static void sort(int[] data, int algorithm) { <T.#A8c
impl[algorithm-1].sort(data); C\2>7
} ?CW^*So
P}WhE
public static interface Sort { X`v79`g_
public void sort(int[] data); FlA\Ad;v
} l)PFzIz=V
vua1iN1
public static void swap(int[] data, int i, int j) { aco}pXz
int temp = data; l^y?L4hg)
data = data[j]; 6dR-HhF
data[j] = temp; m>-^K
} u3i|}`
} "ko?att~