[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; gyV`]uqG
} }bdoJ5
int i1=l; 9V&+xbR&
int i2=mid+1; [wiB1{/Ls.
for(int cur=l;cur<=r;cur++){ 6A|XB3
if(i1==mid+1) yGrnzB6|
data[cur]=temp[i2++]; 6gO( 8
else if(i2>r) GO@<?>K
data[cur]=temp[i1++]; ?*r%*CL
else if(temp[i1] data[cur]=temp[i1++]; 'irwecd8
else ` "-P g5
data[cur]=temp[i2++]; 4GeN<9~YS
} r$'.$k\
} ]@Z nP,8
&(l.jgqg&
} 1ah,Zth2
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改进后的归并排序: wq!9wk9
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package org.rut.util.algorithm.support; 5L~lF8
,F`1VpTd8
import org.rut.util.algorithm.SortUtil; >.9V`m|
&V SZ
/** }R5EuR m\
* @author treeroot `d4xX@
* @since 2006-2-2 x _d
* @version 1.0 I.|b:c xN
*/ ;L#RFdh
public class ImprovedMergeSort implements SortUtil.Sort { B]}gfVO
&m[}%e%~0
private static final int THRESHOLD = 10; !g}@xwWax
-aE,KQ
/* F9r/ M"5
* (non-Javadoc) F$|:'#KN
* jq8TfJ|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8fBhX,1
*/ #f_'&m
public void sort(int[] data) { .d$Q5Qae
int[] temp=new int[data.length]; '@w'(}3!3R
mergeSort(data,temp,0,data.length-1); |8[!`T*s
} 2J$vX(
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private void mergeSort(int[] data, int[] temp, int l, int r) { llh +r?
int i, j, k; u2$.EM/iae
int mid = (l + r) / 2; uTPAf^|
if (l == r) :pz@'J
return; i O?f&u
if ((mid - l) >= THRESHOLD) `,/5skeJ
mergeSort(data, temp, l, mid); f\q5{#"z
else I8B0@ZtV
insertSort(data, l, mid - l + 1); G|-RscPe
if ((r - mid) > THRESHOLD) _h,_HW)G
mergeSort(data, temp, mid + 1, r); 3fXrwmBT8
else 1q5S"=+W[
insertSort(data, mid + 1, r - mid); Q8QB{*4
vdB2T2F
for (i = l; i <= mid; i++) { i^Jw`eAmT
temp = data; F^%\AA]8
} Fv$w:r]q6
for (j = 1; j <= r - mid; j++) { m$(OQ,E
temp[r - j + 1] = data[j + mid]; Mw-L?j0o[k
} W?P4oKsql*
int a = temp[l]; 4${3e Sg_
int b = temp[r]; _5(p=Zc
for (i = l, j = r, k = l; k <= r; k++) { "$K]+0ryG<
if (a < b) { Z1+Ewq3m
data[k] = temp[i++]; Lp@Al#X55
a = temp; !TY0;is
} else { *b0z/6
data[k] = temp[j--]; z j#<X
b = temp[j]; V51kX{S
} u;1[_~
} _1Ne+"V
} M2d&7>N
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/** i[FYR;C
* @param data tSoF!@6
* @param l y:$qX*+9e
* @param i 9,\AAISi
*/ i;]# @n|
private void insertSort(int[] data, int start, int len) { !Icznou\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (Pw,3CbJ
} )dEcKH<#
} Otq1CD9
} D8PC;@m
} L\c3D|
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堆排序： B1E:P`t
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package org.rut.util.algorithm.support; ^J^FGo|M
QkD]9#Id&
import org.rut.util.algorithm.SortUtil; *14:^neoI
-O=xgvh"
/** Y$c7uA:4
* @author treeroot @]}/vsI m
* @since 2006-2-2 _Ye.29
* @version 1.0 c'Ibgfx%m
*/ H]wP\m)
public class HeapSort implements SortUtil.Sort{ T3SFG]H
f O+lD
/* (non-Javadoc) ?Ov~\[) F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T@#?{eA
*/ 8*{jxN'M
public void sort(int[] data) { :)B1|1
MaxHeap h=new MaxHeap(); }0@@_Y]CC
h.init(data); s?->2gxhx
for(int i=0;i h.remove(); Y+vIU*O
System.arraycopy(h.queue,1,data,0,data.length); S# baOO
} i`];xNR'
O<,\tZ'N
private static class MaxHeap{ y\-iGKz{0
Q!=`|X|:
void init(int[] data){ EK0~3HSZ
this.queue=new int[data.length+1]; 60A!Gob
for(int i=0;i queue[++size]=data; 4t/?b
fixUp(size); r%X M`;bQX
} W7_m,{q
} VnB HQ.C
;XjXv'
private int size=0; _!Tjb^
<Uf`'X\e6
private int[] queue; Cd]A1<6s
a&)!zhVP
public int get() { gE=9K @
return queue[1]; wS&D-!8v
} KECW~e`
2P@6Qe ?
public void remove() { >JY\h1+ H
SortUtil.swap(queue,1,size--); \b!E"I_^
fixDown(1); gn~^Ajo
} %VR{<{3f
file://fixdown ,1~zMzw^
private void fixDown(int k) { VSV]6$~H
int j; YPY,gR
while ((j = k << 1) <= size) { ]$^HGmP
if (j < size %26amp;%26amp; queue[j] j++; ME]89 T&
if (queue[k]>queue[j]) file://不用交换 mQ`2c:Rn&7
break; =ePX^J*M'
SortUtil.swap(queue,j,k); N1.1
k = j; Lz-|M?(
} !hS)W7!ik
} YhmveV
private void fixUp(int k) { WDV=]D/OE
while (k > 1) { 6d/v%-3
int j = k >> 1; +s;Vfc$b]H
if (queue[j]>queue[k]) hmG8 {h/
break; kz6fU\U
SortUtil.swap(queue,j,k); 5ZH3}B^L$
k = j; Y{#*;p*I
} +(afO~9
} $9r4MMs{$
L%{YLl-zf]
} dw5"}-D
)uR_d=B&
} +c C. ZOS
8JF<SQ
SortUtil： ~!g2+^G7+P
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package org.rut.util.algorithm; BYhiP/^
x^pt^KR;
import org.rut.util.algorithm.support.BubbleSort; #G`K<%{?f
import org.rut.util.algorithm.support.HeapSort; 5VQ-D`kE+
import org.rut.util.algorithm.support.ImprovedMergeSort; H8dS]N~[Y
import org.rut.util.algorithm.support.ImprovedQuickSort; =2NrmwWZs
import org.rut.util.algorithm.support.InsertSort; W+U0Y,N6
import org.rut.util.algorithm.support.MergeSort; }gt)cOaY
import org.rut.util.algorithm.support.QuickSort; g"m9[R=]6
import org.rut.util.algorithm.support.SelectionSort; -U A &Zt
import org.rut.util.algorithm.support.ShellSort; JXq!v:w6
~jHuJ`]DF
/** N81M9#,["~
* @author treeroot I^u~r.
* @since 2006-2-2 Kr1Y3[iNv
* @version 1.0 oz,.gP%
*/ l Ib d9F
public class SortUtil { !]D`|HoW
public final static int INSERT = 1; UQ7]hX9
public final static int BUBBLE = 2; In1n.oRFn^
public final static int SELECTION = 3; -KfK~P3PF
public final static int SHELL = 4; 4e AMb
public final static int QUICK = 5; >b=."i
public final static int IMPROVED_QUICK = 6; ONDO xXs
public final static int MERGE = 7; h*!oHS~/l
public final static int IMPROVED_MERGE = 8; >G%oWRk
public final static int HEAP = 9; oJ3(7Sz
+r;t]
public static void sort(int[] data) { `zw%
sort(data, IMPROVED_QUICK); CnZEBAU
} 5$Kj#9g-#
private static String[] name={ M<NY`7$^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6<QC|>p
}; t6mv
p[].4_B;
private static Sort[] impl=new Sort[]{ }mIN)o
new InsertSort(), &IzNoB
new BubbleSort(), w3sU& |N
new SelectionSort(), j%w^8}U>G
new ShellSort(), hAc|a9 o
new QuickSort(), LW.j)wB]
new ImprovedQuickSort(), \)o.Y zAo@
new MergeSort(), (S+/e5c)
new ImprovedMergeSort(), JR15y3F
new HeapSort() L]!![v.VY
}; )1Y?S;
lz<' L. .
public static String toString(int algorithm){ 8Q)|8xpYS
return name[algorithm-1]; w$-q&
} bolG3Tf|
9\WtcLx
public static void sort(int[] data, int algorithm) { t1J3'lS
impl[algorithm-1].sort(data); i\b^}m8c.N
} 8Yf*vp>T/x
(s&]V49
public static interface Sort { OPjNmdeS
public void sort(int[] data); DmPsE6G}
} pOn&D
hxM{}}.E
public static void swap(int[] data, int i, int j) { "M[&4'OM
int temp = data; zp}pS2DU
data = data[j]; ]adgOlM
data[j] = temp; ry=8Oq&[~
} L*,h=#x(
} H&p: