[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; x]+KO)I
} }`FC__
int i1=l; {Qmb!`F
int i2=mid+1; b/}0 &VXo
for(int cur=l;cur<=r;cur++){ &r%^wfp
if(i1==mid+1) y]r~v
data[cur]=temp[i2++]; <).qe Z
else if(i2>r) n ZZQxV,
data[cur]=temp[i1++]; Z4zMa&
else if(temp[i1] data[cur]=temp[i1++]; G.ARu-2's
else A8/4:>Is
data[cur]=temp[i2++]; yf^gU*
} +~.Jw#HqS
} Tka="eyIj3
\~j(ui|
} |Qm%G\oB?
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改进后的归并排序: Y6;9j=[
:>ST)Y@]w
package org.rut.util.algorithm.support; < io8 b|A
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import org.rut.util.algorithm.SortUtil; *!s?hHv
!)3Su=*R
/** ):EXh#
* @author treeroot E004"E<E
* @since 2006-2-2 $^ dk>Hj>4
* @version 1.0 / hdl
*/ rX}==`#\
public class ImprovedMergeSort implements SortUtil.Sort { J0bs$
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private static final int THRESHOLD = 10; CPM6T$_qE
3?CpylCO
/* nW*Oo|p~=
* (non-Javadoc) zb)SlR
* HD|)D5wH|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4c@F.I
*/ 'E8Qi'g
public void sort(int[] data) { X_8NW,
int[] temp=new int[data.length]; 6x8|v7cMH
mergeSort(data,temp,0,data.length-1); %4K#<b"W
} d/QM
A8Y~^wn
private void mergeSort(int[] data, int[] temp, int l, int r) { T`[ZNq+${
int i, j, k; )`7h,w J[1
int mid = (l + r) / 2; ,dMi+c`ax
if (l == r) dj**,*s
return; ,R6$SrNcd
if ((mid - l) >= THRESHOLD) ZWEzL$VWi
mergeSort(data, temp, l, mid); ) hB*Hjh
else <L#r6y~H
insertSort(data, l, mid - l + 1); [6N39G$
if ((r - mid) > THRESHOLD) *j:5
mergeSort(data, temp, mid + 1, r); :?W:'% (`[
else 8[IifF1M=&
insertSort(data, mid + 1, r - mid); .Dxrc
;KN@v5`p
for (i = l; i <= mid; i++) { 3_/d=ZI\
temp = data; E zUjt)wF
} ?V&a |:N9
for (j = 1; j <= r - mid; j++) { <9ph c
temp[r - j + 1] = data[j + mid]; a8c]B/
} Rx2|VD
int a = temp[l]; PyE<`E
int b = temp[r]; #+nv,?@
for (i = l, j = r, k = l; k <= r; k++) { &>t1A5
if (a < b) { Sp:de,9@
data[k] = temp[i++]; _zwuK1e
a = temp; M/;g|J jM
} else { ^Tmmx_Xw
data[k] = temp[j--]; 6nhB1Aei
b = temp[j]; OPjh"Hv
} 3W0:0I
} FM];+d0
} tgnXBWA`!
n_glYSV!
/** /% 1lJD
* @param data mJT m/C
* @param l 8=uljn/
* @param i 0[Aa2H*
*/ h 42?^mV4?
private void insertSort(int[] data, int start, int len) { ;Yj&7k1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <0}'#9>O
} z0Hh8*
} 0l*/_;wo
} aR $P}]H
} +M:Q!'
|05LHwb>
堆排序： @DR&e^Zz
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package org.rut.util.algorithm.support; =h{2!Ah7 X
dI|/Xm>
import org.rut.util.algorithm.SortUtil; d0az#Yg!
$i Tgv?.Q
/** s<]l[Y>
* @author treeroot "'(4l 2.
* @since 2006-2-2 LJx g
* @version 1.0 ,55`s#;
*/ !2}Q9a
public class HeapSort implements SortUtil.Sort{ 9 |Y?#oZ1
Mt>DAk
/* (non-Javadoc) o}z}79Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U>XGJQ<NS
*/ $4pW#4/4
public void sort(int[] data) { 8Qh/=Ir
MaxHeap h=new MaxHeap(); _i#Z'4?2E
h.init(data); GS%Dn^l
for(int i=0;i h.remove(); I'wAgf6W
System.arraycopy(h.queue,1,data,0,data.length); eF@E|kK
} fCR;Fk2B
&D#v0!e~x
private static class MaxHeap{ `x{gF8GV
:1Cc~+]w(u
void init(int[] data){ OMU#Sx!6
this.queue=new int[data.length+1]; Hn)=:lI
for(int i=0;i queue[++size]=data; RZjR d
fixUp(size); LtBH4A
} Ql 1# l:Q
} Mv3Ch'X[
r{_'2Z_i
private int size=0; <[bDNe["?
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private int[] queue; ;z#9>99rH
YX(%jcj*
public int get() { ~S9nLb:O{
return queue[1]; C Qebb:y
} |%}?*|-
4=Zlsp
public void remove() { NINiX(
SortUtil.swap(queue,1,size--); F)G#\r
fixDown(1); (@Bm2gH
} ]jYM;e
file://fixdown aum,bm/0J
private void fixDown(int k) { <4Fd~
int j; B$G8,3,:
while ((j = k << 1) <= size) { P?F:x=@'|
if (j < size %26amp;%26amp; queue[j] j++; !8$}]uWP
if (queue[k]>queue[j]) file://不用交换 -h}J%UV
break; {)M4h?.2
SortUtil.swap(queue,j,k); }`(kX]][
k = j; =|V3cM4'
} ~Y(M>u.+!
} @?U5t1O<
private void fixUp(int k) { @tA.^k0`
while (k > 1) { =[,adB
int j = k >> 1; jn[a23;G)
if (queue[j]>queue[k]) Y'P8`$
break; 8"@<s?0\"
SortUtil.swap(queue,j,k); 7)T+!>
k = j; b#M<b.R)
} *QVE>{
} \r2w@F{C
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} C{D2mSS
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} &P;x<7h$t?
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SortUtil： I6\3wU~).
<j>@Fg#q
package org.rut.util.algorithm; d3\8BKp
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import org.rut.util.algorithm.support.BubbleSort; 1L0ku@%t9Y
import org.rut.util.algorithm.support.HeapSort; z(xvt>
import org.rut.util.algorithm.support.ImprovedMergeSort; 8P 8"dN[
import org.rut.util.algorithm.support.ImprovedQuickSort; Qmrcng}P
import org.rut.util.algorithm.support.InsertSort; #SdaTMLFf
import org.rut.util.algorithm.support.MergeSort; 86Rit!ih
import org.rut.util.algorithm.support.QuickSort; VlEkT9^:
import org.rut.util.algorithm.support.SelectionSort; & 2bf
import org.rut.util.algorithm.support.ShellSort; JjwuxZVr O
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/** [Xrq+O,
* @author treeroot cE3co(j
* @since 2006-2-2 1li`+~L F
* @version 1.0 (#:Si~3
*/ ;9~z_orNQZ
public class SortUtil { _I9TG.AA.
public final static int INSERT = 1; GHkSU;})
public final static int BUBBLE = 2; p#&6Ed*V
public final static int SELECTION = 3; ~ 0[K%]]
public final static int SHELL = 4; 8WH>
public final static int QUICK = 5; KQqlM
public final static int IMPROVED_QUICK = 6; G`n-WP
public final static int MERGE = 7; `'93J wYb
public final static int IMPROVED_MERGE = 8; /\9Kr;@vk
public final static int HEAP = 9; Z_;' r|c
%guot~S|
public static void sort(int[] data) { YP7<j*s8
sort(data, IMPROVED_QUICK); z7CYYU?
} %nIjRmqM~
private static String[] name={ oeIS&O.K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" M]W4S4&Y=
}; rEViw?^KT
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private static Sort[] impl=new Sort[]{ <[q)2 5RL
new InsertSort(), A-~)7-
new BubbleSort(), gp}S1
new SelectionSort(), oH;Y}h
new ShellSort(), #\jPBLc
new QuickSort(), V$@2:@8mo
new ImprovedQuickSort(), vD(;VeW[
new MergeSort(), lyV]-w
new ImprovedMergeSort(), dug RO[
new HeapSort() PyoLk
}; ~$@I <=L
e'ZgF~
public static String toString(int algorithm){ Wj3H y4
return name[algorithm-1]; aV ^2
} 6QV/8IX
B<)(7GTv7"
public static void sort(int[] data, int algorithm) { 8dpVB#]pp,
impl[algorithm-1].sort(data); -&&mkK B!
} vL><Y.kOEs
emHi=[!i
public static interface Sort { WlY%f}ln
public void sort(int[] data); PQ5DTk
} lRrOoON
V6!oe^a7'
public static void swap(int[] data, int i, int j) { #qPk,a
int temp = data; C?|gf?1p
data = data[j]; >!$4nxq2>
data[j] = temp; 3drgB;:g`
} Y5;:jYk#<_
} q q`UvU