[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; I"3C/ pU2
} 6H U*,
int i1=l; ZADMtsk
int i2=mid+1; lP]Y^Gz
for(int cur=l;cur<=r;cur++){ G'w!Aws
if(i1==mid+1) ?)k]Vg.
data[cur]=temp[i2++]; 3)?WSOsL:
else if(i2>r) |V{ Q
data[cur]=temp[i1++]; vp!F6ZwO
else if(temp[i1] data[cur]=temp[i1++]; M,li\)J!&
else f`/('}t
data[cur]=temp[i2++]; 5}]+|d;
} [ @"6:tTU
} .%.7~Nu,
SVn@q|N
} hp9LV2_5
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改进后的归并排序: e`7>QS;.
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package org.rut.util.algorithm.support; pO:]3qv
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import org.rut.util.algorithm.SortUtil; >s"/uo
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/** 6\K\d_x
* @author treeroot h:?qd
* @since 2006-2-2 );t+~YPS
* @version 1.0 y6[le*T
*/ ]plp.f#av
public class ImprovedMergeSort implements SortUtil.Sort { Ab j7
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private static final int THRESHOLD = 10; qsbo"29
9=T;Dxn
/* m9:ah<
* (non-Javadoc) >.K%W*t
* P\6:euI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a9{NAyl<oo
*/ V!^0E.?a
public void sort(int[] data) { ."B{U_P&
int[] temp=new int[data.length]; SN L-6]j
mergeSort(data,temp,0,data.length-1); 2; ,8 u
} &}2@pu[S?7
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private void mergeSort(int[] data, int[] temp, int l, int r) { =4SXntU!e
int i, j, k; 9609
int mid = (l + r) / 2; DQXcf*R
if (l == r) Ny$3$5/
return; GQ@mQ=i
if ((mid - l) >= THRESHOLD) .RFH@''
mergeSort(data, temp, l, mid); .43cI(
else Gbclu.4
insertSort(data, l, mid - l + 1); .o/uA
if ((r - mid) > THRESHOLD) HZWt>f
mergeSort(data, temp, mid + 1, r); D^. c:
else a*.#Zgy:lK
insertSort(data, mid + 1, r - mid); 7[qL~BT+
qA`@~\qh"
for (i = l; i <= mid; i++) { \6?a
temp = data; L;j++^p
} L2EQ 9i'[
for (j = 1; j <= r - mid; j++) { C5TV}Bq\
temp[r - j + 1] = data[j + mid]; '&Y_,-i
} Fc\]*
int a = temp[l]; YOGj__:
int b = temp[r]; 0\ (:y^X
for (i = l, j = r, k = l; k <= r; k++) { E JuTv%Y8
if (a < b) { <y^_&9
data[k] = temp[i++]; @/^mFqr2
a = temp; zN]%p>,)HB
} else { jTt9;?)
data[k] = temp[j--]; 0!lWxS0#=
b = temp[j]; !Pnjr T
} QOg >|"KL
} `m<O!I"A
} 3Zd,"/RH
zN[& iKf
/** ,z/aT6M?H
* @param data 81s }4
* @param l YT(Eh3ID
* @param i C]5 kQ1Og
*/ kV?fie<\)
private void insertSort(int[] data, int start, int len) { Bz-jy.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v=lW5%r,'
} H~Vf;k>
} 6V JudNA
} s*yl&El/
} +#BOWz
^ `Ozw^~
堆排序： t&{;6MiE
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package org.rut.util.algorithm.support; B^P&+,\[}
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import org.rut.util.algorithm.SortUtil; f?k0(rl
h L [eA
/** W>d)(
* @author treeroot %ZWt 45A
* @since 2006-2-2 9ABU^ig
* @version 1.0 HV/:OCK
*/ ^OWG9`p+
public class HeapSort implements SortUtil.Sort{ h`1<+1J9
Fl=H5HR
/* (non-Javadoc) x$BNFb%I1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jUA~}DVD
*/ -W('^v_*
public void sort(int[] data) { ;;+AdN5
MaxHeap h=new MaxHeap(); Nv36#^Z
h.init(data); =ejU(1 g
for(int i=0;i h.remove(); Yr-SlO>
System.arraycopy(h.queue,1,data,0,data.length); G|1.qHP[F
} XxmWj-=qO
4{zy)GE|W
private static class MaxHeap{ |3,WiK='
IV. })8
void init(int[] data){ #c@&mus
this.queue=new int[data.length+1]; 4y7_P0}:B
for(int i=0;i queue[++size]=data; -]zb3P
fixUp(size); nD*iSb*
} uWdF7|PN7
} 04|ZwX$>+
<.4(#Ebd
private int size=0; Bgc]t
<F0^+Pf/
private int[] queue; [q[37;ZEQ
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public int get() { C-c'"FHq
return queue[1]; P1LOj
} {j>a_]dTVX
BM /FOY;
public void remove() { z&d.YO_W
SortUtil.swap(queue,1,size--); iVZ}+Ct<"
fixDown(1); xE?KJ
} zs#-E_^%M
file://fixdown e3;D1@
private void fixDown(int k) { \Yr*x7!
int j; d%'#-w'
while ((j = k << 1) <= size) { kMch
if (j < size %26amp;%26amp; queue[j] j++; )f:i4.M
if (queue[k]>queue[j]) file://不用交换 2\1+M)
break; '|ntwK*f
SortUtil.swap(queue,j,k); nahq O|~
k = j; AtCT
} `3T=z{HR9g
} *GE6zGdN
private void fixUp(int k) { }UW*[dCf>C
while (k > 1) { ?{f6su@rW
int j = k >> 1; o1(;"5MM
if (queue[j]>queue[k]) Wds>'zzS
break; c 1F^Gj!8
SortUtil.swap(queue,j,k); K& ^qn&
k = j; lUEbxN
} Nz`8)Le
} "crR{OjE"
T/P\j0hR
} <9fXf*
AEyD?^?
} x7zc3%T's
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SortUtil： cl^UFlf[
V[/9?5pM
package org.rut.util.algorithm; 06.%9R{
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import org.rut.util.algorithm.support.BubbleSort; La1:WYt
import org.rut.util.algorithm.support.HeapSort; |cY HH$
import org.rut.util.algorithm.support.ImprovedMergeSort; %;:![?M
import org.rut.util.algorithm.support.ImprovedQuickSort; .2JZ7
import org.rut.util.algorithm.support.InsertSort; }NC$Ce
import org.rut.util.algorithm.support.MergeSort; :[n~(~7?
import org.rut.util.algorithm.support.QuickSort; ,nteIR'??
import org.rut.util.algorithm.support.SelectionSort; u?72]?SM
import org.rut.util.algorithm.support.ShellSort; K _VIk'RB
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/** 5 [~HL_u;,
* @author treeroot (]'wQ4iQ
* @since 2006-2-2 &EV%g6
* @version 1.0 ^;PjO|mD Z
*/ f<bB= 9J
public class SortUtil { cwzkA,e@
public final static int INSERT = 1; n>.@@
public final static int BUBBLE = 2; h8UhrD<:
public final static int SELECTION = 3; aF?_V!#cT
public final static int SHELL = 4; vf3)T;X>
public final static int QUICK = 5; j13-?fQ&
public final static int IMPROVED_QUICK = 6; IwnDG;+Ap
public final static int MERGE = 7; S,:!H@~B
public final static int IMPROVED_MERGE = 8; 1w7tRw
public final static int HEAP = 9; }XBF#BN
Qt4mg?X/
public static void sort(int[] data) { qWr=Oiu
sort(data, IMPROVED_QUICK); _)5E=
} 45.ks.
private static String[] name={ )b1hF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QHO n?e
}; cN&Ebn
G>vK$W$f N
private static Sort[] impl=new Sort[]{ *$0*5d7
new InsertSort(), n}Z%D-b$
new BubbleSort(), [ft6xI
new SelectionSort(), ~Re4zU
new ShellSort(), O.Pp*sQ^
new QuickSort(), ++,I`x+p
new ImprovedQuickSort(), A` _dj}UF
new MergeSort(), 6t;;Fz
new ImprovedMergeSort(), q("XS
new HeapSort() $5G(_
}; Iz+%wAZ|B6
O/#3QK
public static String toString(int algorithm){ 9~~NxWY%x
return name[algorithm-1]; 1<m`38'
} dM^EYW
m^L!_~
public static void sort(int[] data, int algorithm) { Q|o$^D,
impl[algorithm-1].sort(data); [&99#7B
} x@43ZH_
Fj<*!J$,
public static interface Sort { l3b=8yn.
public void sort(int[] data); h!SsIy(
} u $-&Im<
2EM6k|l5
public static void swap(int[] data, int i, int j) { [G8EX3
int temp = data; M4)U [v
data = data[j]; O)&W0`VY
data[j] = temp; AAa7)^R
} vcQl0+&
} y_L8i[