[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; W=c7>s0>
} w,bILv)
int i1=l; {>H#/I8si
int i2=mid+1; ;5:g%Dt
for(int cur=l;cur<=r;cur++){ >@KQ )p' `
if(i1==mid+1) ([R}s/)$
data[cur]=temp[i2++]; q#:,6HDd
else if(i2>r) x|d Xa0=N_
data[cur]=temp[i1++]; G~1#kg
else if(temp[i1] data[cur]=temp[i1++]; (~:k70V5
else +c.A|!-
data[cur]=temp[i2++]; "nPmQ
} 5cO}Jp%PA
} #~3x^4Y
J~eY,n.6]
} IT! a)d
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改进后的归并排序: (Z"QHfO'
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package org.rut.util.algorithm.support; h#'(i<5v
]:i :QiYD
import org.rut.util.algorithm.SortUtil; E1IRb':
X&o!xV -+
/** mr6/d1af_
* @author treeroot 3G9"La,b
* @since 2006-2-2 et(/`
* @version 1.0 ,mEFp_a+
*/ ^"7tfo8
public class ImprovedMergeSort implements SortUtil.Sort { %lNv?sWb
`2c>M\c4U
private static final int THRESHOLD = 10; sP$bp Z}
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/* "~Twx]Z
* (non-Javadoc) <MZ$baK
* Rn~FCj,-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #gq4%;
*/ |Ak>kQJ(1z
public void sort(int[] data) { g <^Y^~+E
int[] temp=new int[data.length]; yn<H^c
mergeSort(data,temp,0,data.length-1); CnruaN@
} }$!bD
D5fJuT-bp
private void mergeSort(int[] data, int[] temp, int l, int r) { #q`[(`Bx
int i, j, k; P7QOlTQI
int mid = (l + r) / 2; (-*NRY3*
if (l == r) )hmU/E@
return; `bu3S}m7
if ((mid - l) >= THRESHOLD) <GPL8D
mergeSort(data, temp, l, mid); WRU/^g3O@'
else ,/6V^K
insertSort(data, l, mid - l + 1); BM=`zGh"
if ((r - mid) > THRESHOLD) j)ZvlRi,
mergeSort(data, temp, mid + 1, r); N ?Jr8
else v{`Z
insertSort(data, mid + 1, r - mid); (UDF^
&i"33.#]
for (i = l; i <= mid; i++) { @Tb T
temp = data; },'hhj]O
} TEz)d=
for (j = 1; j <= r - mid; j++) { {6Lkh
temp[r - j + 1] = data[j + mid]; ?xh_qy;
} _d6mf4M]5
int a = temp[l]; B%gk[!d}8
int b = temp[r]; XRXKO>4q
for (i = l, j = r, k = l; k <= r; k++) { {Uxah
if (a < b) { ,OWdp<z
data[k] = temp[i++]; /*p4(D_A
a = temp; !iUdej^tx
} else { &&$/>[0=.
data[k] = temp[j--]; !e@G[%k
b = temp[j]; ~ z4T
} 1Lz`.%k`:
} uA=6 HpDB
} #@H{Ypn`
:p@H
/** IIeEe7%#
* @param data WI9'$hB\
* @param l >0)E\_ u
* @param i Ug^C}".&
*/ K+2bNKZ0
private void insertSort(int[] data, int start, int len) { &:=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *cCr0\Z`
} X@Eq5s
} hKtOh
} 8=gr F
} ^|xj.
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堆排序： ASY uZ
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package org.rut.util.algorithm.support; $>v^%E;Y4
A}C&WT~
import org.rut.util.algorithm.SortUtil; =bs4*[zq
Ek_k_!
/** 8F($RnP3
* @author treeroot 0uzis09
* @since 2006-2-2 U#G uB&V
* @version 1.0 a8M.EFa:
*/ wJ!
public class HeapSort implements SortUtil.Sort{ `}k!SqG
QI~s~j
/* (non-Javadoc) ( f8g}2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JiZ9ly(G
*/ @A!Ef=R
public void sort(int[] data) { i051qpj
MaxHeap h=new MaxHeap(); Xn.zN>mB
h.init(data); 8>j+xbw
for(int i=0;i h.remove(); "A__z|sQ
System.arraycopy(h.queue,1,data,0,data.length); dDW],d}B;
} }@@1N3nnxV
mDipP
private static class MaxHeap{ gv `jeN
d|on y
void init(int[] data){ n$y1kD
this.queue=new int[data.length+1]; '\1%%F7
for(int i=0;i queue[++size]=data; ,!kyrk6
fixUp(size); 51`w.ri
} +x G](?
} @U;-5KYYi
j='Ne5X1
private int size=0; r-]R4#z>
5 W(iU
private int[] queue; PZLWyp
0J$wX yh
public int get() { zQ]IlMt
return queue[1]; )~d2`1zGS
} TuIeaH%x
a6WE,4T9
public void remove() { "4g1I<
SortUtil.swap(queue,1,size--); rorzxp{
fixDown(1); v8*ZwF
} +hjc~|RK
file://fixdown HxZ4t
private void fixDown(int k) { NWCnt,FlY
int j; "T}J|28Z
while ((j = k << 1) <= size) { 1}[\@n+b
if (j < size %26amp;%26amp; queue[j] j++; DX$`\PA
if (queue[k]>queue[j]) file://不用交换 MLBZmM '
break; q6j]j~JxB
SortUtil.swap(queue,j,k); 7MGc+M(p
k = j; `9K'I-hv<8
} Om}&`AP};
} s ]QzNc
private void fixUp(int k) { 9\Xl3j!
while (k > 1) { !\awT
int j = k >> 1; G>:l(PW:
if (queue[j]>queue[k]) c |C12b[
break; }=f}@JlFB
SortUtil.swap(queue,j,k); Q&QR{?PMD
k = j; E\V>3rse
} tD4IwX
} *D<sk7
{'!D2y.7g
} +IS$Un
nosEo?{
} dk(-yv'
:A[bqRqe
SortUtil： DdSUB
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package org.rut.util.algorithm; V9<[v?.\
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import org.rut.util.algorithm.support.BubbleSort; nIsi
import org.rut.util.algorithm.support.HeapSort; DV%tby
import org.rut.util.algorithm.support.ImprovedMergeSort; x_@ev-
import org.rut.util.algorithm.support.ImprovedQuickSort; } KMdfA
import org.rut.util.algorithm.support.InsertSort; qQ1m5_OD`z
import org.rut.util.algorithm.support.MergeSort; [ B (lJz
import org.rut.util.algorithm.support.QuickSort; omRd'\ RO
import org.rut.util.algorithm.support.SelectionSort; n[iil$VKh
import org.rut.util.algorithm.support.ShellSort; ^mz_T+UOe
RK'( {1
/** vuAAaKz
* @author treeroot 3Q;^X(Ml*
* @since 2006-2-2 tICxAp:
* @version 1.0 b _u&%
*/ Y]Fq)-
public class SortUtil { 7=<PVJ*/
public final static int INSERT = 1; a)TNVm^
public final static int BUBBLE = 2; /60[T@Mz
public final static int SELECTION = 3; @DUdgPA
public final static int SHELL = 4; DC$ S. {n
public final static int QUICK = 5; 9 /zz@
public final static int IMPROVED_QUICK = 6; 92VAQU6
public final static int MERGE = 7; .K7A!;
public final static int IMPROVED_MERGE = 8; 96PVn
public final static int HEAP = 9; n>eIQaV
NMj`wQ`M+
public static void sort(int[] data) { JPpYT~4
sort(data, IMPROVED_QUICK); FVD}9ia
} 2fLd/x~
private static String[] name={ Q3/q%#q>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nRo`O
}; 21WqLgT3 4
xH f9N?
private static Sort[] impl=new Sort[]{ Q72wg~%w
new InsertSort(), KC]Jbm{y
new BubbleSort(), %-*vlNC)
new SelectionSort(), 0 /kbxpih
new ShellSort(), M84LbgGM%
new QuickSort(), + zrwz\
new ImprovedQuickSort(), J`8>QMK^5
new MergeSort(), HOD2/
new ImprovedMergeSort(), yk5P/H)
new HeapSort() hKT:@l*
}; (Q4_3<G+
mvL'l)
public static String toString(int algorithm){ GS$k
return name[algorithm-1]; D4vmBVT
} ^GAdl}
ljis3{kn""
public static void sort(int[] data, int algorithm) { _F*w ,b$8
impl[algorithm-1].sort(data); Y5NbY02E
} %%Kg'{-:
|{jAMC0#
public static interface Sort { O}`01A!u;
public void sort(int[] data); IL=v[)en4
} k1U~S`>$
(g)@wNBW
public static void swap(int[] data, int i, int j) { qB39\j
int temp = data; g@y" B6X
data = data[j]; 1h#k&r#*3
data[j] = temp; ?.A|Fy^
} 0B4(t6o
} 6C0_. =7#