[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; Knp}88DR^j
} %r@:7/
int i1=l; A~;.9{6J[t
int i2=mid+1; H|3CZ=U?
for(int cur=l;cur<=r;cur++){ qykI[4
if(i1==mid+1) \Hu?K\SWs
data[cur]=temp[i2++]; D77$aCt
else if(i2>r) ^[EXTBk@:
data[cur]=temp[i1++]; N_p^DP
else if(temp[i1] data[cur]=temp[i1++]; ;+n25_9
else wsj5;(f+
data[cur]=temp[i2++]; 0IQ|`C.
} ]sqp^tQ`e
} [9Hrpo]tU:
w ; PV &M
} KssIoP
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改进后的归并排序: ig'4DmNC
@9g!5dcT
package org.rut.util.algorithm.support; RPkOtRKL=w
zc1~q
import org.rut.util.algorithm.SortUtil; YVO~0bX:
9abn6S(XpJ
/** CYNpbv
* @author treeroot 3ZqtIQY`
* @since 2006-2-2 Q[bIkvr|
* @version 1.0 /?C6oj1
*/ u]<`y6=&C
public class ImprovedMergeSort implements SortUtil.Sort { F5<GGEQb
$]b&3_O$N8
private static final int THRESHOLD = 10; R[2h!.O8
pXe]hnY
/* u &{|f
* (non-Javadoc) Of{'A
* BBsZPJ5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mh~n#bah
*/ @"`{Sh`Y$
public void sort(int[] data) { Ay\!ohIS3
int[] temp=new int[data.length]; (<#Ns W!z
mergeSort(data,temp,0,data.length-1); yXA]E.K!
} G/8G`teAZ
7h.:XlUm|
private void mergeSort(int[] data, int[] temp, int l, int r) { m}nA-*
int i, j, k; 0'Qo eFKG
int mid = (l + r) / 2; 4?e7s.9N
if (l == r) }u'O<d~z?
return; XJf1LGT5
if ((mid - l) >= THRESHOLD) %suXp,j
mergeSort(data, temp, l, mid); 3WF6bJN
else E%>){Y)
insertSort(data, l, mid - l + 1); +yu^Z*_
if ((r - mid) > THRESHOLD) HUY1nb=
mergeSort(data, temp, mid + 1, r); ACxjY2
else vM2\tL@"
insertSort(data, mid + 1, r - mid); (`Q_^Bfyl
g/m%A2M&aH
for (i = l; i <= mid; i++) { UkBr4{+aE
temp = data; Yim`3>#t
} ?28aEX_w
for (j = 1; j <= r - mid; j++) { Z=P=oldH
temp[r - j + 1] = data[j + mid]; [KjL`
} a0x/?)DO
int a = temp[l]; eEkbD"Q
int b = temp[r]; w`OHNwXh#I
for (i = l, j = r, k = l; k <= r; k++) { EYF]&+ 9
if (a < b) { ^aO\WKkA
data[k] = temp[i++]; 1~P ^g`
a = temp; t^1c^RpTb
} else { ceqYyVy
data[k] = temp[j--]; 9}6^5f?|
b = temp[j]; [-Dl,P=
} L1E\^)
} K%"cVqb2V
} i&?do{YQ)
SpUcrK;1
/** ,*@6NK,.
* @param data hkL[hD
* @param l o$DJL11E
* @param i (PN!k0Y
*/ 1JoRP~mMxa
private void insertSort(int[] data, int start, int len) { URD<KIN>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OVm $
} 5:H9B
} DOm5azO!>
} Q[k7taoy
} 0oi =}lV
JOIbxU{U_
堆排序： Y@Kp'+t(!
{<- BU[H
package org.rut.util.algorithm.support; NwdA@"YQ|
a|im DY_-j
import org.rut.util.algorithm.SortUtil; X|7Y|0o
}GCt)i_
/** Whq@>pX8
* @author treeroot r='"X#CmV/
* @since 2006-2-2 +`x8[A)-
* @version 1.0 "3v[\M3
*/ }I'g@Pw9[
public class HeapSort implements SortUtil.Sort{ /0mbG!Ac
y$At$i>u
/* (non-Javadoc) #U NTD4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <Dw`Ur^X5
*/ WKQVT I&A.
public void sort(int[] data) { t,.MtU>K@
MaxHeap h=new MaxHeap(); gHC -Y 0_
h.init(data); sgo({zA`i
for(int i=0;i h.remove(); Vet7a_
System.arraycopy(h.queue,1,data,0,data.length); Fr)G h>
} cRX0i;zag
"}]1OL SV
private static class MaxHeap{ 78\:{i->ta
}xHoitOD
void init(int[] data){ "|<\\HR
this.queue=new int[data.length+1]; */n)_
for(int i=0;i queue[++size]=data; 0EYK3<k9!
fixUp(size); W$0<a@
} d9[*&[2J|
} o)7gKWjujP
FG-w7a2mn
private int size=0; 02} &h
RR><so%
private int[] queue; 0}c*u) ,
Z^>[{|lIA
public int get() { =/"Of
return queue[1]; !Ljs9 =UF
} tgDmHxB]0
/b20!3
public void remove() { })Rmu."\
SortUtil.swap(queue,1,size--); 8h~v%aZ1
fixDown(1); uYS?# g
} 8f% @
file://fixdown /!UuGm
private void fixDown(int k) { G.O0*E2V
int j; >>wbyj8
while ((j = k << 1) <= size) { PEoOs
if (j < size %26amp;%26amp; queue[j] j++; C8y 3T/G
if (queue[k]>queue[j]) file://不用交换 ~ @Ib:M
break; 9tXLC|yl?
SortUtil.swap(queue,j,k); 46*o_A,"
k = j; L._I"g5 H9
} 0X-u'=Bs
} ,:QG%Et
private void fixUp(int k) { !'B.ad
while (k > 1) { O1coay
int j = k >> 1; ^v3ytS
if (queue[j]>queue[k]) <dDGV>n4;
break; GdR>S('
SortUtil.swap(queue,j,k); ji`N1e,l
k = j; (80]xLEBL
} U}6'_ PRQ
} P@p(Y2&~g
X^?<, Y)1.
} 8^$}!9B~JZ
$.cNY+ k
} 1fQvh/2
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SortUtil： ${KDGJ,^
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package org.rut.util.algorithm; T%KZV/
6t TLyI$+
import org.rut.util.algorithm.support.BubbleSort; "4H&wHhT!
import org.rut.util.algorithm.support.HeapSort; ._-^58[
import org.rut.util.algorithm.support.ImprovedMergeSort; C!B2.:ja
import org.rut.util.algorithm.support.ImprovedQuickSort; vd SV6p.d
import org.rut.util.algorithm.support.InsertSort; u1ggLH!U
import org.rut.util.algorithm.support.MergeSort; ~kYUp5f
import org.rut.util.algorithm.support.QuickSort; 4t|g G`QW7
import org.rut.util.algorithm.support.SelectionSort; Yp./3b VO
import org.rut.util.algorithm.support.ShellSort; 9cWl/7;zXO
22`W*e@6h
/** AR]y p{NS
* @author treeroot q0.+F4
* @since 2006-2-2 N/TUcG|m\
* @version 1.0 '[~NRKQJ
*/ 3)zanoYHi
public class SortUtil { 0MF[e3)a
public final static int INSERT = 1; bAeC=?U
public final static int BUBBLE = 2; +e`f|OQ
public final static int SELECTION = 3; n(/(F`
public final static int SHELL = 4; C&,&~^_F
public final static int QUICK = 5; *&+e2itmp
public final static int IMPROVED_QUICK = 6; {tV)+T
public final static int MERGE = 7; ~{0:`)2FQ
public final static int IMPROVED_MERGE = 8; "L|Ew#
public final static int HEAP = 9; xpx=t71Hq
=_\5h=`Yx
public static void sort(int[] data) { 7UejK r
sort(data, IMPROVED_QUICK); 4cRF3$amd
} BZ">N
private static String[] name={ bA@!0,m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BdG~y1%:
}; ]IoJ(4f
_Buwz_[&
private static Sort[] impl=new Sort[]{ xM8}Xo
new InsertSort(), iN"kv
new BubbleSort(), 2xhwi.u
new SelectionSort(), @JZ I
new ShellSort(), 6B)(kPW
new QuickSort(), @vss:'l
new ImprovedQuickSort(), ^&zwO7cS
new MergeSort(), gYA|JFi
new ImprovedMergeSort(), ]{{A/ j\
new HeapSort() y{,HpPp#o
}; 7cr@;%#
9JBPE
public static String toString(int algorithm){ Gi~p-OS,
return name[algorithm-1]; WW{5[;LYiB
} =<e|<EwSZ
l9lBhltOH
public static void sort(int[] data, int algorithm) { #:s*)(Qn
impl[algorithm-1].sort(data); U s86.@|
} ;n%SjQ'%
]|it&4l
public static interface Sort { ;&q}G1
public void sort(int[] data); mcy\nAf5%
} 6v(}<2~
.+MJ' bW
public static void swap(int[] data, int i, int j) { E0!}~Z)
int temp = data; n1m[7s.[&
data = data[j]; OSQZ5:g|
data[j] = temp; B8UtD
} k__iJsk
} /:3:Ky3