[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; bhW&,"$Z
} <^e
int i1=l; +rDKx(Rk
int i2=mid+1; [E qZj/
for(int cur=l;cur<=r;cur++){ H00iy$R
if(i1==mid+1) - G=doP0
data[cur]=temp[i2++]; 7Ewq'Vu`y
else if(i2>r) `mS0]/AV/
data[cur]=temp[i1++]; 7aHP;X~0
else if(temp[i1] data[cur]=temp[i1++]; )s ?Hkn
else ztC,[
data[cur]=temp[i2++]; 1E$^ul-v
} 8`|Z9umW*
} /!hxW}>^
NU3s^ 8\(
} f!B\X*|
[QwqP=-6
改进后的归并排序: ;a(7%
AaM~B`B
package org.rut.util.algorithm.support; >PUT(yNL
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import org.rut.util.algorithm.SortUtil; b C"rQJg
6MQyr2c
/** v;s^j
* @author treeroot C]krJse@
* @since 2006-2-2 sQO>1bh
* @version 1.0 yk2XfY
*/ W: 3fLXk+
public class ImprovedMergeSort implements SortUtil.Sort { &/)To
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private static final int THRESHOLD = 10; sGGi7%
yONX?cS
/* GP=bp_L
* (non-Javadoc) l0%7u
* x!fRT.,}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +"VXw2R_e
*/ rpL]5e!
public void sort(int[] data) { [4mIww%
int[] temp=new int[data.length]; Ro#O{
mergeSort(data,temp,0,data.length-1); LUA<N:
} yY80E[v
~@D{&7@
private void mergeSort(int[] data, int[] temp, int l, int r) { F^cu!-L
int i, j, k; 41i#w;ojI
int mid = (l + r) / 2; z[]8"C=
if (l == r) J/c5)IB|
return; [h0)V(1KR
if ((mid - l) >= THRESHOLD) Shu=oweJ
mergeSort(data, temp, l, mid); bG]?AiWr
else 3Io7!:+
insertSort(data, l, mid - l + 1); xp]_>WGq
if ((r - mid) > THRESHOLD) B~u`bn,iQ
mergeSort(data, temp, mid + 1, r); BHS8MV L@
else KY9@2JG
insertSort(data, mid + 1, r - mid); &hIr@Gi@ch
-8sB\E
for (i = l; i <= mid; i++) { gzp]hh@4
temp = data; nO8e'&|
} {fn1sGA
for (j = 1; j <= r - mid; j++) { N. 0~4H %U
temp[r - j + 1] = data[j + mid]; \WM"VT
} )fbYP@9>a
int a = temp[l]; ?b?YiK&yz
int b = temp[r]; AN+S6t
for (i = l, j = r, k = l; k <= r; k++) { o_.`&Q6n
if (a < b) { vk3C&!M<a
data[k] = temp[i++]; -K0!wrKC
a = temp; F>aaUj
} else { }J_#N.y
data[k] = temp[j--]; #$u7:p [t
b = temp[j]; ^dKtUH/78G
} 9-Xr
} (6i.>%|_
} =la~D]T*g
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/** @E?o~jO(e
* @param data &xS] ;Fr
* @param l mz3Dt>
* @param i ;_A?Zl}
*/ et@<MU@`
private void insertSort(int[] data, int start, int len) { :Mq{ES%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Uq(fk9`6
} TL: 6Pe
} R(GL{Dh}L
} +3r4GEa Z
} +w(B9rH
Ji0FHa_
堆排序： u9R@rQ9r
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package org.rut.util.algorithm.support; =L,7~9
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import org.rut.util.algorithm.SortUtil; +.66Ky`|[
ZP"Xn/L
/** qyR}|<F8*
* @author treeroot \mNN ) K@
* @since 2006-2-2 &>vfm9
* @version 1.0 Z \;{e'#o
*/ > |(L3UA9
public class HeapSort implements SortUtil.Sort{ 'E4}++\
Eu$hC]w
/* (non-Javadoc) N$P\$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) otdm rw|
*/ />V& OX`
public void sort(int[] data) { |) CfO4
MaxHeap h=new MaxHeap(); A0H6}53, $
h.init(data); M)sAMfuUw
for(int i=0;i h.remove(); r!/<%\S
System.arraycopy(h.queue,1,data,0,data.length); "_n})s f
} <!derr-K
6~a4-5;>z
private static class MaxHeap{ \W"p<oo|H
noO#o+ Jg#
void init(int[] data){ )^j62uv
this.queue=new int[data.length+1]; >ui;B$=
for(int i=0;i queue[++size]=data; 4ms"mIt
fixUp(size); GyQvodqD
} .hK:-q,
} ,(z"s8N
h|OWtf4
private int size=0; Uh3N#O
6-f-/$B
private int[] queue; ,7SqRY,+
:rEZR`
public int get() { TECp!`)j"
return queue[1]; |eP5iy wg
} FR6PY
@J<RFgw#
public void remove() { &L r~x#Wx
SortUtil.swap(queue,1,size--); b$>1_wTL
fixDown(1); Fq'Ds[wd5
} {Hzj(c~S?
file://fixdown YGOhUT |
private void fixDown(int k) { %(:{TR
int j; o8N,mGj}
while ((j = k << 1) <= size) { x,TnYqT^
if (j < size %26amp;%26amp; queue[j] j++; pSodTG$E
if (queue[k]>queue[j]) file://不用交换 =&WH9IKz
break; -b=Aj8h
SortUtil.swap(queue,j,k); G@scz!Nt
k = j; wnHfjF
} ;e6-*
} __`6 W1
private void fixUp(int k) { S%df'bh$
while (k > 1) { q5\iQ2f{WV
int j = k >> 1; #E#Fk3-ljQ
if (queue[j]>queue[k]) Nu@dMG<5
break; | &/_{T
SortUtil.swap(queue,j,k); e;9x%kNs!
k = j; d^d+8R
} M# cJ&+rP
} gPIl:, d(
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} E_Fm5zb?X
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} h8icF}m
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SortUtil： L$v<t/W
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package org.rut.util.algorithm; i-R}O6
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import org.rut.util.algorithm.support.BubbleSort; #{@qC2!2/
import org.rut.util.algorithm.support.HeapSort; _,3%)sn-)
import org.rut.util.algorithm.support.ImprovedMergeSort; z[0tM&pv
import org.rut.util.algorithm.support.ImprovedQuickSort; yacN=]SW5
import org.rut.util.algorithm.support.InsertSort; $ J!PSF8PL
import org.rut.util.algorithm.support.MergeSort; X~Hm.qIR
import org.rut.util.algorithm.support.QuickSort; >~L0M
import org.rut.util.algorithm.support.SelectionSort; ?Zc(Zy6
import org.rut.util.algorithm.support.ShellSort; 3zMaHh)mj
)C0d*T0i
/** J>1%*Tz
* @author treeroot O"J"H2}S
* @since 2006-2-2 Op:$7hv
* @version 1.0 Bv#?.0Ez;
*/ huvn_
public class SortUtil { rTim1<IXR
public final static int INSERT = 1; H{1'- wB
public final static int BUBBLE = 2; _}tPtHPa/
public final static int SELECTION = 3; B(Er/\-@U
public final static int SHELL = 4; HJt '@t=Ak
public final static int QUICK = 5; 6xx(o
public final static int IMPROVED_QUICK = 6; Wu'9ouw!
public final static int MERGE = 7; A[uB)wWsn
public final static int IMPROVED_MERGE = 8; |qpFR)l
public final static int HEAP = 9; .TNGiUzG
?nZe.z-%6
public static void sort(int[] data) { gnw">H
sort(data, IMPROVED_QUICK); gi$'x^]#
} #x \YA#~
private static String[] name={ 2x~Pq_?y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M,<UnAVP-
}; aI1tG
FmgMd)#
private static Sort[] impl=new Sort[]{ fpJ%{z2
new InsertSort(), Xq}}T%jcd
new BubbleSort(), sK8sxy
new SelectionSort(), :KS"&h{SY
new ShellSort(), z=Xh
new QuickSort(), }yw>d\] f
new ImprovedQuickSort(), mSGpxZ,IE
new MergeSort(), kt+h\^g
new ImprovedMergeSort(), yJMo/!DZ
new HeapSort() GU]kgwSfi
}; g!^mewtd
_} K3}}
public static String toString(int algorithm){ P3v4!tR
return name[algorithm-1]; PW\me7iCz
} ,s/laZ)V
FcyFE~>2
public static void sort(int[] data, int algorithm) { "^wIixOH5
impl[algorithm-1].sort(data); ;7*T6~tv
} yw{r:fy
t :~,7
public static interface Sort { l[C_vUg
public void sort(int[] data); TSVlZy~Xo
} gH*(1*
V=8npz
public static void swap(int[] data, int i, int j) { J[c`Qq:&e
int temp = data; rp|A88Q/!
data = data[j]; 35L\
data[j] = temp; 7MsJ*En
} HubK
} tJA"BP3f