[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; p`)GO.pz
} n4cM /unU
int i1=l; =7JvS~s
int i2=mid+1; s0 ZF+6f
for(int cur=l;cur<=r;cur++){ J2$L[d^
if(i1==mid+1) +P?!yH,n
data[cur]=temp[i2++]; >[=fbL@N<@
else if(i2>r) gNdEPaaFI
data[cur]=temp[i1++]; 2FxrMCC
else if(temp[i1] data[cur]=temp[i1++]; Gk9Y{
else p9;Oe,Il
data[cur]=temp[i2++]; }dl[~iKW
} |D %m>M6
} E|t. 3
ze<Lc/;X~
} K85;7R5
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改进后的归并排序: }7>r,
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package org.rut.util.algorithm.support; 0UEEvD5
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import org.rut.util.algorithm.SortUtil; W0X/&v,k*
qn VxP&
/** 7cGc`7
* @author treeroot =/Ob kVYf
* @since 2006-2-2 d`he Wv^/`
* @version 1.0 Jhclg0q
*/ M^c`j#NQ
public class ImprovedMergeSort implements SortUtil.Sort { U{vt9t
g]IRv(gDh
private static final int THRESHOLD = 10; v=A]#O%
'~HCYE:5
/* 7~@9=e8G
* (non-Javadoc) ?MT V!i0
* O,`#h*{N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @l)HX'z0d
*/ 2D;,'
public void sort(int[] data) { L*xu<(>K
int[] temp=new int[data.length]; b'9\j.By
mergeSort(data,temp,0,data.length-1); <9JI@\>
} iGxlB
~c&ygL3
private void mergeSort(int[] data, int[] temp, int l, int r) { #-xsAKi
int i, j, k; @6eM{3E.
int mid = (l + r) / 2; :Ve>tZeW
if (l == r) &b[.bf
return; xV&c)l>}
if ((mid - l) >= THRESHOLD) \K$9r=!(
mergeSort(data, temp, l, mid); sN`2"t/s
else ke'aSD
insertSort(data, l, mid - l + 1); |JZ3aS
if ((r - mid) > THRESHOLD) v~f_~v5J!
mergeSort(data, temp, mid + 1, r); #k%$A}9
else &cDLSnR
insertSort(data, mid + 1, r - mid); Hc`)Q vFRW
EwvW: t1
for (i = l; i <= mid; i++) { 4~mYj@lvd
temp = data; WmO.&zp
} BI\ )vr$
for (j = 1; j <= r - mid; j++) { ]JQ7x[
temp[r - j + 1] = data[j + mid]; {BkTJQ)
} $#3O:aW
int a = temp[l]; G:$Ta6=
int b = temp[r]; F*`*5:7
for (i = l, j = r, k = l; k <= r; k++) { :fo.9J
if (a < b) { ,$i2vGd
data[k] = temp[i++]; zX{O"w
a = temp; SG:Fn8
} else { KIyhvY~
data[k] = temp[j--]; f{ ;L"*L
b = temp[j]; ,$"*X-1
} =Q\z*.5j.
} Rra3)i`*
} %49P<vo`?
i2. +E&3v
/** %gK@R3p
* @param data !GB\-(
* @param l > -P UY
* @param i 0rM'VgB
*/ ;WydXQ}Q^
private void insertSort(int[] data, int start, int len) { eIZ7uSl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yQAW\0`
} Y nD_:ZK
} :c4iXK0_^?
} DhN{Y8'~
} s(~tL-_ K
xF:}a:c@H
堆排序： =ttvC"4?
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package org.rut.util.algorithm.support; M]FA y"E
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import org.rut.util.algorithm.SortUtil; 6j*L]Sc
>K|<hzZ
/** :Ma=P\J W
* @author treeroot ORVFp]gG
* @since 2006-2-2 c[p>*FnP
* @version 1.0 >XTDN
*/ ,\YlDcl':0
public class HeapSort implements SortUtil.Sort{ <+7]EwVcn^
BHmmvbM#Qm
/* (non-Javadoc) qDG{hvl[1r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UE:';(t
*/ |p4D!M+$7
public void sort(int[] data) { g8=j{]~C
MaxHeap h=new MaxHeap(); }>q%##<n
h.init(data); Uq}FrK}
for(int i=0;i h.remove(); #6fQ$x(F#j
System.arraycopy(h.queue,1,data,0,data.length); 41-u*$
} g0Rny
ua!i3]18
private static class MaxHeap{ !p:kEIZ)y
*d~).z)
void init(int[] data){ ((& y:{?G
this.queue=new int[data.length+1]; caG5S#8-"
for(int i=0;i queue[++size]=data; p$5uS=:4`8
fixUp(size); wSy|h*a,
} x9QUo*MT
} y\a@'LFL
=1kE2u
private int size=0; Hnq$d6F
A_8UPGh8
private int[] queue; P\jnht
_*K=Z,a;\
public int get() { fT]hpoJl
return queue[1]; |M8FMH[_
} ;u:A:Y4V
~J~@mE2ks
public void remove() { xE$>;30b_
SortUtil.swap(queue,1,size--); L=7Y~aL=
fixDown(1); y cT@D/
} nj90`O.K
file://fixdown 3^jkd)xw
private void fixDown(int k) { _Wb3,E a=
int j; ''Pu
while ((j = k << 1) <= size) { U4$}8~o4
if (j < size %26amp;%26amp; queue[j] j++; Jw+k=>
if (queue[k]>queue[j]) file://不用交换 g!QX#_~Il
break; 2|6E{o
SortUtil.swap(queue,j,k); !iNN6-v%
k = j; ",v!geMvu
} j3-^,r t4
} /JqNiqvh
private void fixUp(int k) { >'eY/>n{
while (k > 1) { j1Ns|oph1
int j = k >> 1; bjL8Wpk
if (queue[j]>queue[k]) a)o-6
break; 7>-"r*W +z
SortUtil.swap(queue,j,k); 3rxB]-
k = j; Th'B5:`
} zfsGf'U
} =qJlSb
nB|m!fi<
} KbXENz&C
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} IPVD^a?
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SortUtil： _c z$w5`
9}*Pb6
package org.rut.util.algorithm; lH%%iYBM
tM:%{az
import org.rut.util.algorithm.support.BubbleSort; S5+W<Qs
import org.rut.util.algorithm.support.HeapSort; 7hzd.
import org.rut.util.algorithm.support.ImprovedMergeSort; c,yjsxETW
import org.rut.util.algorithm.support.ImprovedQuickSort; J4) ?hS
import org.rut.util.algorithm.support.InsertSort; C j4ED
import org.rut.util.algorithm.support.MergeSort; VYo2m
import org.rut.util.algorithm.support.QuickSort; +|w%}/N
import org.rut.util.algorithm.support.SelectionSort; m=4hi(g
import org.rut.util.algorithm.support.ShellSort; LBIsj}e
ML!>tCT
/** 6)]zt
* @author treeroot t/vw%|AS
* @since 2006-2-2 %ij,xN
* @version 1.0 2lu AF2
*/ )N'-Ap$g
public class SortUtil { n>XfXt =
public final static int INSERT = 1; *SmR|Qy
public final static int BUBBLE = 2; XU*4MU^'
public final static int SELECTION = 3; eZ G#op
public final static int SHELL = 4; ?qmJJ5Gn
public final static int QUICK = 5; w(N$$
public final static int IMPROVED_QUICK = 6; #xoFcjRE
public final static int MERGE = 7; gebDNl\Y2
public final static int IMPROVED_MERGE = 8; 8XG|K`'u
public final static int HEAP = 9; k .#I ;7
j /)A<j$
public static void sort(int[] data) { oc>N| ww:
sort(data, IMPROVED_QUICK); )*`cJ_t
} xbNL <3"a
private static String[] name={ <*3#nA-O>i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '}, 8x?
}; PKg>|]Rf.
PNp-/1Cx
private static Sort[] impl=new Sort[]{ VkD}gJY
new InsertSort(), Q`zW[Y&]
new BubbleSort(), =K;M\_k%y
new SelectionSort(), (7 O?NS
new ShellSort(), 2[X\*"MQ2
new QuickSort(), G_E \p%L>]
new ImprovedQuickSort(), "nA~/t=
new MergeSort(), 8dUP_t~d#q
new ImprovedMergeSort(), OnND(YiX
new HeapSort() 2EC<8}CG
}; B1k;!@@14
T(z/Jm3
public static String toString(int algorithm){ ..fbRt
return name[algorithm-1]; `L m9!?
} 'E)g )@^
i`7(5L~`
public static void sort(int[] data, int algorithm) { v\G+t2{
impl[algorithm-1].sort(data); |ERf3
} VUUE2k;^
o^3X5})sv
public static interface Sort { v/GZByco>
public void sort(int[] data); iOdk)
} M`49ydh&
*3A)s O
public static void swap(int[] data, int i, int j) { >|rU*+I`
int temp = data; V'8Rz#Gc5
data = data[j]; }G ^nK m
data[j] = temp; *cy!PF&
} 1a tQ9
} r E&}B5PN=