[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; |wyJh"4!
} (50[,:#
int i1=l; 0|K/=dh5+
int i2=mid+1; b7>,-O
for(int cur=l;cur<=r;cur++){ gKm@B{rC
if(i1==mid+1) [F BCz>
data[cur]=temp[i2++]; <IHFD^3|j
else if(i2>r) ]ft~OqLg!
data[cur]=temp[i1++]; % RBI\tj
else if(temp[i1] data[cur]=temp[i1++]; T9U2j-lA?
else X+'^Sp
data[cur]=temp[i2++]; <?=mLOo=
} _taHf %\4
} 5* o\z&*L
D~i@. k
} 9FIe W[
U||w6:W5
改进后的归并排序: h.}t${1ZC
8R??J>h5\
package org.rut.util.algorithm.support; vS24;:f
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import org.rut.util.algorithm.SortUtil; F`ZIc7(.{
%M0mwty]
/** W2W2WyPk
* @author treeroot 6yl;o_6:
* @since 2006-2-2 j~,LoGuPh
* @version 1.0 Jv4D^>yj[
*/ gw&#X~em
public class ImprovedMergeSort implements SortUtil.Sort { ~y-vKCp|
vxilQp
private static final int THRESHOLD = 10; kT }'"
|au qj2
/* L@k;L
* (non-Javadoc) rO?x/{;ai
* tMPXvE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jn <^Q7N
*/ Y+_5"LV
public void sort(int[] data) { S'-`\%@7
int[] temp=new int[data.length]; gt t$O
mergeSort(data,temp,0,data.length-1); mP$G9R
} T m@1q!G
b#I*~
private void mergeSort(int[] data, int[] temp, int l, int r) { |n6Q
int i, j, k; -C'X4C+
int mid = (l + r) / 2; ~ Dp:j*H
if (l == r) 1-NX>E5
return; FG5c:Ep
if ((mid - l) >= THRESHOLD) | 8L`osg
mergeSort(data, temp, l, mid); _l{5'm
else 72`/xryY
insertSort(data, l, mid - l + 1); ]20"la5
if ((r - mid) > THRESHOLD) X-N$+[#
mergeSort(data, temp, mid + 1, r); hte9l)
else T;[c<gc/
insertSort(data, mid + 1, r - mid); n40MP5RxY
|Q)w3\S$
for (i = l; i <= mid; i++) { \Af|$9boHz
temp = data; Y\z\{JW
} .iN*V|n
for (j = 1; j <= r - mid; j++) { LI|HET_
temp[r - j + 1] = data[j + mid]; c.{&~
} d,rEEc Y
int a = temp[l]; BfE-s<
int b = temp[r]; x^O2Lj,w\
for (i = l, j = r, k = l; k <= r; k++) { pn%|;
if (a < b) { 6p=xgk-q
data[k] = temp[i++]; q>:&xR"ra
a = temp; =O'%)Y&
} else { 8~Hs3\Hp
data[k] = temp[j--]; aLk2#1$g
b = temp[j]; Nx (pJp{S
} AW&s-b%P
} p,u<gJUL
} [O+^eE6h
o4 g
/** $~@096`QL<
* @param data ApJf4D<V
* @param l F4<2.V)#-
* @param i Hr*Pi3dSI
*/ ^RAFmM#F
private void insertSort(int[] data, int start, int len) { |21hY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *^+xcG
} <IDzv'
} "sx&8H"
} N5Mz=UgB
} wVJFA1
%e<dV\x?T
堆排序： HgATH
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package org.rut.util.algorithm.support; U@5Z9/n{
LbbQ3$@WD
import org.rut.util.algorithm.SortUtil; N~J Eia%
}~'Wz*Gm
/** `srZ#F5
* @author treeroot Od]xIk+E
* @since 2006-2-2 bCe-0!Q
* @version 1.0 >D4Ez
*/ gbf=H8]
public class HeapSort implements SortUtil.Sort{ g2<S4
9ufs6z
/* (non-Javadoc) 10IPq#Jj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aB!Am +g
*/ f:&OOD o
public void sort(int[] data) { rg/vxTl
MaxHeap h=new MaxHeap(); +M&S
h.init(data); H^:|`T|,
for(int i=0;i h.remove(); ucPMT0k
System.arraycopy(h.queue,1,data,0,data.length); 2B dr#qr
} $-fY8V3[
&)jZ|Q~
private static class MaxHeap{ B&N&eRAE
|bnjC$b*
void init(int[] data){ t+J6P)=
this.queue=new int[data.length+1]; *v/*_6f*
for(int i=0;i queue[++size]=data; J3^ZPW
fixUp(size); A_|FsQ6$P
} beZ| i 1:
} h18y?e7MU
MXV4bgltT
private int size=0; S9oGf
z5vI0 N$
private int[] queue; ~GYtU9s5
C~V$G}mM
public int get() { S\!E;p
return queue[1]; w/6@R 4)p
} P<x
V/}8+Xq
public void remove() { %([H*sLX
SortUtil.swap(queue,1,size--); mP[u[|]
fixDown(1); cSk}53
} V7_??L%Ct`
file://fixdown cpnwx1q@
private void fixDown(int k) { :%MWbnVSC,
int j; |?A-?-
while ((j = k << 1) <= size) { e*s{/a?,
if (j < size %26amp;%26amp; queue[j] j++; Dx'e+Bm
if (queue[k]>queue[j]) file://不用交换 P,_E 4y
break; 5wX>PJS
SortUtil.swap(queue,j,k); K_n%`5
k = j; q/?_djv
} m5{SPa,y
} 64fG,b
private void fixUp(int k) { }*.*{I
while (k > 1) { Y\sjm]_
int j = k >> 1; Z-(HDn
if (queue[j]>queue[k]) 063;D+
break; '%N)(S`O7P
SortUtil.swap(queue,j,k); `f]O
k = j; .SN]hLV5
} |3m%d2V*hF
} vE(Hy&Q&
mM.&c5U
} 2wQ CQ"
9MxGyGz$
} mX^RSg9E}
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SortUtil： K>y+3HN[6
za7wNe(s
package org.rut.util.algorithm; PAkW[;GSDh
LKcrr;
import org.rut.util.algorithm.support.BubbleSort; {'!~j!1'j
import org.rut.util.algorithm.support.HeapSort; 4NV1v&"
import org.rut.util.algorithm.support.ImprovedMergeSort; x{$NstGB
import org.rut.util.algorithm.support.ImprovedQuickSort; rej[G!
import org.rut.util.algorithm.support.InsertSort; O5 SX"A
import org.rut.util.algorithm.support.MergeSort; ~\P.gSiz
import org.rut.util.algorithm.support.QuickSort; Kl?1)u3^4
import org.rut.util.algorithm.support.SelectionSort; M &J*I
import org.rut.util.algorithm.support.ShellSort; zdCt#=QV?R
zlE kP @)
/** qb&*,zN
* @author treeroot zeX?]@]Y
* @since 2006-2-2 z61 o6mb
* @version 1.0 S[M$>
*/ EX_&wep@1
public class SortUtil { /l L*U
public final static int INSERT = 1; G1rgp>m
public final static int BUBBLE = 2; Lst5
public final static int SELECTION = 3; YC~+r8ME$j
public final static int SHELL = 4; &D:88
public final static int QUICK = 5; GfDA5v[
public final static int IMPROVED_QUICK = 6; +\4=G@P.J
public final static int MERGE = 7; Sc&_6}K
public final static int IMPROVED_MERGE = 8; L6T_&AiL$
public final static int HEAP = 9; 2;/hFwm
bTj,5,8i
public static void sort(int[] data) { TUG3#PSnm*
sort(data, IMPROVED_QUICK); #/T)9=m
} ]P.S5s'
private static String[] name={ ^IpS 3y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W8)GT`\
}; E%TvGe;#
VuGSP]$q
private static Sort[] impl=new Sort[]{ %llG/]q#
new InsertSort(), \gdd
new BubbleSort(), ^#+9v
new SelectionSort(), t1kD5^
new ShellSort(), 79\ =)m}$Q
new QuickSort(), ,M9'S;&^
new ImprovedQuickSort(), 7r>^_aW
new MergeSort(), 52oR^|
new ImprovedMergeSort(), tZJKB1#WbP
new HeapSort() --FvE|I
}; ~/t#J
DGcd|>q
public static String toString(int algorithm){ {+!_; zzZ
return name[algorithm-1]; `+U-oqs
} t^q/'9Ai&J
[*Lh4K
public static void sort(int[] data, int algorithm) { xaPTTa
impl[algorithm-1].sort(data); Mf?4 `LM
} M:ttzsd
Q?~l=}2
public static interface Sort { #N*~Q
public void sort(int[] data); T+I|2HYqOj
} 74Lq!e3hMF
<3i!{"}
public static void swap(int[] data, int i, int j) { -50|r;a
int temp = data; wDn5|F}i&
data = data[j]; |KuH2,n0
data[j] = temp; x,n;GR
} ur;8uv2o
} T7[ItLZ