[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; :OY7y`hRG
} n8e}8.Bu
int i1=l; QV%eTA
int i2=mid+1; RveMz$Yy
for(int cur=l;cur<=r;cur++){ jCt[I5"+z
if(i1==mid+1) cFG%Ew@
data[cur]=temp[i2++]; HR k^KB
else if(i2>r) \V<deMb=
data[cur]=temp[i1++]; |<7nf75c}
else if(temp[i1] data[cur]=temp[i1++]; \hZ9in`YlR
else Yr+ghl/ V
data[cur]=temp[i2++]; zd[cp@
} (KG>lTdN
} )'?@raB!
UBy:W^\g
} Wv)2dD2I
`L}Irt}
改进后的归并排序: [k6 5i
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package org.rut.util.algorithm.support; C0Ti9
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import org.rut.util.algorithm.SortUtil; mh`VZQ@
V?Zvu9b&
/** w-MnJ(r
* @author treeroot uU00ZPS*G[
* @since 2006-2-2 =zW.~(c{
* @version 1.0 ;zvg] %
*/ +Gvf5+ 5VR
public class ImprovedMergeSort implements SortUtil.Sort { Z$5@r2d)
<)(STo
private static final int THRESHOLD = 10; $ V"7UA22
T|[o
/* 21U,!
* (non-Javadoc) %.D@{O
* fKAG+t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7nHlDPps)
*/ SNd]c
public void sort(int[] data) { 52#@.Qa
int[] temp=new int[data.length]; eESJk14
mergeSort(data,temp,0,data.length-1); qN_jsJ
} -pR1xsG
%8+'L4
private void mergeSort(int[] data, int[] temp, int l, int r) { ]E)gMf
int i, j, k; ,*V{gpC7
int mid = (l + r) / 2; N*My2t_+E
if (l == r) N|h}'p
return; vf(\?Js,
if ((mid - l) >= THRESHOLD) "sRR:wzQu
mergeSort(data, temp, l, mid); ~>ACMO
else TlZ|E '_C
insertSort(data, l, mid - l + 1); 7Q.?]k&
if ((r - mid) > THRESHOLD) @Tzh3,F2
mergeSort(data, temp, mid + 1, r); BfF$
else u<\/T&S
insertSort(data, mid + 1, r - mid); 'on, YEp
fN>o465I6
for (i = l; i <= mid; i++) { (a1s~
temp = data; i3>7R'q>
} !UlG!820
for (j = 1; j <= r - mid; j++) { SVaC)O(
temp[r - j + 1] = data[j + mid]; w.Ft-RXA W
} x5 3aGi|
int a = temp[l]; [>4Ou^=1
int b = temp[r]; Uw][U
for (i = l, j = r, k = l; k <= r; k++) { ;e_n7>'#%
if (a < b) { [:sV;37s
data[k] = temp[i++]; _y),C
a = temp; 'zZN]P
} else { +X0?bVT
data[k] = temp[j--]; pVPCxP
b = temp[j]; Q5/".x^@
} m Fwx},dl
} =g$%.
} B9n$8QS
PSNrY e
/** 7 rOziKZ"
* @param data n_hV;
* @param l Lu6!W
* @param i /N7j5v(
*/ Sim\+SL{#
private void insertSort(int[] data, int start, int len) { '$PiyM|V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ; 7[5%xM
} Id(L}i(X
} |28z4.
} Q\Fgc ;.U
} )&<BQIv9/
B3]q*ERAo
堆排序： ~%B^`s
Y'`w.+9
package org.rut.util.algorithm.support; nWfOiw-t
$uF}GP_)
import org.rut.util.algorithm.SortUtil; S v$%-x^t
Oj6-
/** b'4{l[3~nl
* @author treeroot gh|TlvnA
* @since 2006-2-2 5\V>Sj(
* @version 1.0 DZ |0CB~
*/ x-,+skZs
public class HeapSort implements SortUtil.Sort{ iVLfAN @
#TM+Vd$
/* (non-Javadoc) %Iw6oG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [nB[]j<R*
*/ 8hZ+[E}
public void sort(int[] data) { [O>}%
MaxHeap h=new MaxHeap(); V6B`q;lA
h.init(data); +hI:5(_
for(int i=0;i h.remove(); F$y3oX
System.arraycopy(h.queue,1,data,0,data.length); N?TXPY
} `h}fS4CO
I{U7BZy
private static class MaxHeap{ 1%68Pnqk
9&}$C]`
void init(int[] data){ Gjfb<
this.queue=new int[data.length+1]; 7)tkqfb]
for(int i=0;i queue[++size]=data; :rd{y`59>&
fixUp(size); d(9ZopJrQ
} Jw3VWc ]]
} 5gYv CW&~
F_.rLgGY
private int size=0; )voJq\Y)%
(Ild>_Tdb`
private int[] queue; 'c7C*6;a
jYDpJ##Zb
public int get() { KT$Za
return queue[1]; |LhVANz
} 0M=A,`qk
5My4a9
public void remove() { ]!CMo+
SortUtil.swap(queue,1,size--); }z%fQbw
fixDown(1); *-uA\
} 9U~fc U6
file://fixdown T_iX1blrgh
private void fixDown(int k) { 4Z8FLA+T,
int j; |i_+b@Lul
while ((j = k << 1) <= size) { [g)HoR=&
if (j < size %26amp;%26amp; queue[j] j++; S$#"bK/p^
if (queue[k]>queue[j]) file://不用交换 s0r::yO
break; 6z`l}<q
SortUtil.swap(queue,j,k); jW]Q-
k = j; >b\{y}[
} K0;caqE^
} 0O>T{<
private void fixUp(int k) { 0zQ~'x
while (k > 1) { co^bS;r
int j = k >> 1; {Kh^)oYdd
if (queue[j]>queue[k]) g[G+s4Nv
break; BD.&K_AW
SortUtil.swap(queue,j,k); R+sv?4k
k = j; K HyVI6N[
} ,GeW_!Q[
} aH/8&.JLi
oYx4+xH/
} B*Z}=$1j
DpCe_Vb%M
} @LSfP
#W$6[#7=I
SortUtil： tt&#4Z
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package org.rut.util.algorithm; @`mr|-Rp@
953GmNZ7
import org.rut.util.algorithm.support.BubbleSort; Y{KN:|i.!
import org.rut.util.algorithm.support.HeapSort; !w1acmo<_
import org.rut.util.algorithm.support.ImprovedMergeSort; q}PUwN6
import org.rut.util.algorithm.support.ImprovedQuickSort; w`GjQIA
import org.rut.util.algorithm.support.InsertSort; \B4f5L8k
import org.rut.util.algorithm.support.MergeSort; y$Fk0s*>
import org.rut.util.algorithm.support.QuickSort; Sq]VtQ(
import org.rut.util.algorithm.support.SelectionSort; !L[$t~z
import org.rut.util.algorithm.support.ShellSort; Prc(
fJ GwT
/** ZAJ~Tbm[f
* @author treeroot l&|Tb8_'
* @since 2006-2-2 %MCJ%Ph
* @version 1.0 63`5A3rii
*/ (I/ZI'Ydy
public class SortUtil { :jAsm[
public final static int INSERT = 1; zYxA#TZL
public final static int BUBBLE = 2; s .@Szq
public final static int SELECTION = 3; _BEDQb{"|
public final static int SHELL = 4; vYybQ&E/
public final static int QUICK = 5; ,\-4X
public final static int IMPROVED_QUICK = 6; Zd|u>tn
public final static int MERGE = 7; eN'b"_D
public final static int IMPROVED_MERGE = 8; *5u3d`bW
public final static int HEAP = 9; :*M2@
.unlr_eA
public static void sort(int[] data) { C).+h7{nd
sort(data, IMPROVED_QUICK); ba tXj]:
} (M?VB*sm0
private static String[] name={ C1#f/o->
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $a|>>?8
}; au E8 ^|
Sim$:5P
private static Sort[] impl=new Sort[]{ ]DUmp6
new InsertSort(), '=H3Y_{oO
new BubbleSort(), 4j}.=u*X7
new SelectionSort(), +y_V$q$G
new ShellSort(), bN&DotG
new QuickSort(), 6P T)
new ImprovedQuickSort(), de9e7.(2
new MergeSort(), dUBf.2ry
new ImprovedMergeSort(), IrIW>r} -
new HeapSort() b\^1P;!'W
}; ewdcAF5
M96Nt&P`
public static String toString(int algorithm){ |kF"p~s
return name[algorithm-1]; yO/'}FD
} yjOZed;M
/g1;`F(MS/
public static void sort(int[] data, int algorithm) { sZwa#CQKq
impl[algorithm-1].sort(data); ?k=)T]-}
} #<@_mbQ@|K
u= Ga}
public static interface Sort { E*yot[kj
public void sort(int[] data); _ t.E_K
} F ~e}=Nb
M=fhRCUB
public static void swap(int[] data, int i, int j) { BwYR"
int temp = data; l}FA&c"
data = data[j]; 8/}S/$
data[j] = temp; gF]IAZCi
} 8}X>u2t
} MM~4D