[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; -Zc![cAlO
} Q!'qC*Gyfn
int i1=l; rT6?!$"%.
int i2=mid+1; d8x%SQ!V
for(int cur=l;cur<=r;cur++){ PuCc2'#
if(i1==mid+1) )&W**!(C
data[cur]=temp[i2++]; ,.mBJSE3
else if(i2>r) }iiHr|l3
data[cur]=temp[i1++]; S2^>6/[xM
else if(temp[i1] data[cur]=temp[i1++]; {qpi?oY
else iEHh{H(
data[cur]=temp[i2++]; f~h~5
} (-^bj
} gS9>N/b|
gK1g]Tc@G
} !iu5OX7K|
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改进后的归并排序: 4<S'
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package org.rut.util.algorithm.support; Le#spvV3J|
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import org.rut.util.algorithm.SortUtil; LR&_2e^[
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/** `DW2spd
* @author treeroot B#l?IB~
* @since 2006-2-2 = !2NU
* @version 1.0 QwWW!8
*/ :%4imgY`
public class ImprovedMergeSort implements SortUtil.Sort { Ngy=!g?Hk=
~}ovuf=%
private static final int THRESHOLD = 10; TkRP3_b
lxb zHlX
/* I9 64
* (non-Javadoc) OI/@3"L{
* ?vtX"Fdz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4 J^Q]-Z
*/ k4\UK#ODe
public void sort(int[] data) { 4{na+M
int[] temp=new int[data.length]; Va<eusl
mergeSort(data,temp,0,data.length-1); <iLM{@lZvJ
} YZwaD b
/@oLe[Mz$
private void mergeSort(int[] data, int[] temp, int l, int r) { [xlIG}e9
int i, j, k; a\5FAkI
int mid = (l + r) / 2; @4GA^h
if (l == r) On_@HQ/FI
return; `C72sA{M.
if ((mid - l) >= THRESHOLD) 't (O$
mergeSort(data, temp, l, mid); 4gBp8*2
else 1%~ZRmd e
insertSort(data, l, mid - l + 1); TJ_=1Y@z
if ((r - mid) > THRESHOLD) _^S]gmE
mergeSort(data, temp, mid + 1, r); R)8s
else +Ic ~ f1zh
insertSort(data, mid + 1, r - mid); gX @`X
!u|Tu4G^
for (i = l; i <= mid; i++) { ]!"S+gT*C
temp = data; ]`o!1(GA
} sfD5!Z9#1
for (j = 1; j <= r - mid; j++) { {3\R|tZh,`
temp[r - j + 1] = data[j + mid]; %:9oDK
} al^!,ykc
int a = temp[l]; X]j)+DX>
int b = temp[r]; Ub$n |xn
for (i = l, j = r, k = l; k <= r; k++) { #?O&
if (a < b) { YlK7;yrq(
data[k] = temp[i++]; ~W#sTrK
a = temp; !X^Ce)1K
} else { n{5NNV6
data[k] = temp[j--]; :py\|
b = temp[j]; _=f=fcl
} g}xQ6rd
} "jg@w%~
} Xz{~3ih
QV|>4^1D
/** Yc Q=vt{
* @param data Y$ Fj2nk+
* @param l \.{AAj^qD
* @param i !kuX,*}q
*/ Tenf:Hm/k
private void insertSort(int[] data, int start, int len) { 0JyVNuHn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r`'y?Bra;
} WY
} Kyg=$^{>G
} -#:zsu
} PH3 >9/H
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堆排序： #$ thPZ
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package org.rut.util.algorithm.support; <v 0*]NiX
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import org.rut.util.algorithm.SortUtil; %8.J=B
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/** ^_+XDO
* @author treeroot dE`-\J
* @since 2006-2-2 T)~9Wac
* @version 1.0 :\ QUs}
*/ *Ust[u
public class HeapSort implements SortUtil.Sort{ ,Ds.x@p
!p"aAZT7sq
/* (non-Javadoc) "hz\Z0zg2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AvJ,SQt
*/ &K+0xnUH
public void sort(int[] data) { !]` #JAL7
MaxHeap h=new MaxHeap(); xG2F!WeF
h.init(data); 9nSWE W
for(int i=0;i h.remove(); DPn=n9n2
System.arraycopy(h.queue,1,data,0,data.length); Ucw yxXI
} G[Lpe
GbP!9I
private static class MaxHeap{ [/M^[p
H].y w9
void init(int[] data){ P$GjF-!:
this.queue=new int[data.length+1]; | tQiFC
for(int i=0;i queue[++size]=data; Ey[On^$
fixUp(size); 6.1)IQkO
} 0U/,aHvhP
} g| <wyt[
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private int size=0; Bf`9V713
z&8un%Jt
private int[] queue; 07g':QU@
d)o!5L
public int get() { Os%n{_#8
return queue[1]; '\#EIG
} D('2p8;2"7
x`RTp:#
public void remove() { >ydRSr^
SortUtil.swap(queue,1,size--); `Hx~UH)
fixDown(1); owpWz6k7
} qSCv )S(
file://fixdown Z(>'0]G
private void fixDown(int k) { t+r:"bb
int j; smY$-v)@
while ((j = k << 1) <= size) { J T#d(Y
if (j < size %26amp;%26amp; queue[j] j++; 0yM[Z':i'{
if (queue[k]>queue[j]) file://不用交换 <+#oBN
break; r\6"5cQ=
SortUtil.swap(queue,j,k); g?v\!/~(u
k = j; S{Hx]\
} >kZ57,
} x"P);su
private void fixUp(int k) { fQK"h
while (k > 1) { /Ss7"*JLe
int j = k >> 1; jVgFZ,
if (queue[j]>queue[k]) ~rr 4ok
break; =VLS/\A
SortUtil.swap(queue,j,k); #3=P4FUz.
k = j; f ).1]~
} 3ss6_xd+
} h4pTq[4*
$/1c= Y@
} 1{Mcs%W;w5
qH,l#I\CG
} $QEilf;E
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SortUtil： Q^K"8 ;
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package org.rut.util.algorithm; 'D1A}X
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import org.rut.util.algorithm.support.BubbleSort; ! Z`0(d
import org.rut.util.algorithm.support.HeapSort; IL/Yc1
import org.rut.util.algorithm.support.ImprovedMergeSort; D0(xNhmKz
import org.rut.util.algorithm.support.ImprovedQuickSort; x.0p%O=`
import org.rut.util.algorithm.support.InsertSort; Z}A%=Z\/3
import org.rut.util.algorithm.support.MergeSort; 4Tc&IwR
import org.rut.util.algorithm.support.QuickSort; {j{+0V
import org.rut.util.algorithm.support.SelectionSort; ;Yfv!\^|
import org.rut.util.algorithm.support.ShellSort; S_T^G` [
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/** 8 #X5K
* @author treeroot yL^UE=#C_
* @since 2006-2-2 +`M!D }!
* @version 1.0 LWsP ya
*/ ']-@?sD$
public class SortUtil { y|&}.~U[
public final static int INSERT = 1; d8SE,A&
public final static int BUBBLE = 2; m\>a,oZH
public final static int SELECTION = 3; %B5r"=oO
public final static int SHELL = 4; 'evj,zFhW
public final static int QUICK = 5; *tOG*hwdT
public final static int IMPROVED_QUICK = 6; GT hL/M
public final static int MERGE = 7; /:6Wzj
public final static int IMPROVED_MERGE = 8; C.^Ven
public final static int HEAP = 9; +t4BQf
D9mz9
public static void sort(int[] data) { 2-zT$`[]J
sort(data, IMPROVED_QUICK); V]c;^
} KD1=Y80P
private static String[] name={ =ItkFjhBc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z)XRx:YU;$
}; b5IA"w
=&0wr6
private static Sort[] impl=new Sort[]{ Bx"7%[
new InsertSort(), t#nn@Yf
new BubbleSort(), LNl#h
new SelectionSort(), 3QSZ ZJ
new ShellSort(), xt'tL:d
new QuickSort(), o47r<>t
new ImprovedQuickSort(), RO0>I8c1c
new MergeSort(), mDGn:oRj
new ImprovedMergeSort(), @cRZk`|1n
new HeapSort() P X;Ed*y
}; /:<IIqO.
_UE)*l m+
public static String toString(int algorithm){ z|?R/Gf8
return name[algorithm-1]; q1y/x@
} { 74mf'IW
7f<EoSK
public static void sort(int[] data, int algorithm) { Z=4{Vv*
impl[algorithm-1].sort(data); M L7\BT
} /!}'t
>U1R.B7f
public static interface Sort { H* ,,^
public void sort(int[] data); n\I#CH0V
} "M|P+A
#U=X NU}k
public static void swap(int[] data, int i, int j) { }7{t^>;D
int temp = data; ~Au,#7X)
data = data[j]; ]fnnZ
data[j] = temp; d_S*#/k
} %8aC1x
} nFX_+4V2