[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; p;P cD
} +<$b6^>!$
int i1=l; )mh,F#"L
int i2=mid+1; ATkx_1]KM-
for(int cur=l;cur<=r;cur++){ <E1ngG
if(i1==mid+1) ]s>y se
data[cur]=temp[i2++]; T(q/$p&q
else if(i2>r) Xd@_:ds
data[cur]=temp[i1++]; R.)w l
else if(temp[i1] data[cur]=temp[i1++]; ZB'ms[
else (>M@Ukam:
data[cur]=temp[i2++]; MzpDvnI9
} QQW]j;'~
} +WfO2V.
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} ",>,t_J
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改进后的归并排序: Bnu5\P
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package org.rut.util.algorithm.support; 5K[MKfT
9 =zZ,dg
import org.rut.util.algorithm.SortUtil; PsOu:`=r
N*6lyFcg
/** 4fgYO]
* @author treeroot HE.YfD)
* @since 2006-2-2 Ek,$XH
* @version 1.0 P{[@t_
*/ [l:}#5\]4
public class ImprovedMergeSort implements SortUtil.Sort { 9 6j*F,{
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private static final int THRESHOLD = 10; rw%1>]os
%P HYJc
/* i_ z4;%#?
* (non-Javadoc) :Lh`Q"a
* ^7-l<R[T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]Z=O+7(r
*/ P>[,,w
public void sort(int[] data) { L3|~ i&k
int[] temp=new int[data.length]; [*W l=
mergeSort(data,temp,0,data.length-1); Y9ipy_@_?
} :7DXLI|L#?
iVAAGZ>am
private void mergeSort(int[] data, int[] temp, int l, int r) { 65>}Q.p
int i, j, k; fiZq C?(
int mid = (l + r) / 2; XTS%:S
if (l == r) dvPlKLp
return; 'FN+BvD
if ((mid - l) >= THRESHOLD) jQ&82X%m
mergeSort(data, temp, l, mid); 3Ued>8Gv
else `2PvE4]%p
insertSort(data, l, mid - l + 1); p?e-`xs
if ((r - mid) > THRESHOLD) F_z1ey`t
mergeSort(data, temp, mid + 1, r); 3R)_'!R[B
else fUa[3)I
insertSort(data, mid + 1, r - mid); vq-#%o
MGfIA?u
for (i = l; i <= mid; i++) { Z?j4WJy-[
temp = data; ^Y?Y5`!Q
} 29kR7[k
for (j = 1; j <= r - mid; j++) { G*'1[Bu
temp[r - j + 1] = data[j + mid]; #{x4s?
} 8XhGo2zf
int a = temp[l]; .u\xA7X
int b = temp[r]; iiD}2yb
for (i = l, j = r, k = l; k <= r; k++) { ]m@p? A$
if (a < b) { 94b* !Z
data[k] = temp[i++]; mz?1J4rt
a = temp; @8"cT-
} else { -I*NS6
data[k] = temp[j--]; ^<w3i?KPW
b = temp[j]; d8%sGH
} ' T%70)CM~
} }/g1s71
} ;|AyP
hYY-Eq4TC
/** ,*j@Zb_r
* @param data E)]RQ~jY?
* @param l SPo}!&p$~
* @param i 7kq6VS;p
*/ m(p0)X),_i
private void insertSort(int[] data, int start, int len) { i8i~b8r]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E%vT(Kz
} mt*/%>@7R
} 5~\GAjf
} /Q\|u:oO,
} sQgJ`+Y8_
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堆排序： &7Lg)PG
4)+L(KyB2
package org.rut.util.algorithm.support; /`VrV{\/!
h[}e5A]}
import org.rut.util.algorithm.SortUtil; .qD=u1{p9
F|^tRL-
/** -,^Z5N#\|
* @author treeroot ^Kfm(E
* @since 2006-2-2 f}uW(:f
* @version 1.0 KxUO=v<u
*/ x{I, gu|+
public class HeapSort implements SortUtil.Sort{ :<i<\TH'
"d c- !
/* (non-Javadoc) =q?sB]n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tde&w=ec
*/ B'!I{LC
public void sort(int[] data) { ]D&\|,,(
MaxHeap h=new MaxHeap(); #s3R4@{
h.init(data); ~xU\%@I\
for(int i=0;i h.remove(); #[yZP9
System.arraycopy(h.queue,1,data,0,data.length); I|R;)[;X
} #Z1 <lAy
;Wedj\Kkp
private static class MaxHeap{ u?lbC9}$
!G~`5?CvE
void init(int[] data){ /MV2#P@
this.queue=new int[data.length+1]; vG#,J&aW
for(int i=0;i queue[++size]=data; h$$2(!G4
fixUp(size); $J!WuOz4^i
} Bf8[(oc~
} `!lQd}W
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private int size=0; bo40s9"-*W
<(W:Q3?s
private int[] queue; eh}I?:(a?
)2: ,E
public int get() { {I]>!V0j!
return queue[1]; VX]Ud\(
} k4`(7Z
(=t41-l
public void remove() { UthM?g^
SortUtil.swap(queue,1,size--); <P0&!yN
fixDown(1); 'QQa :3<x
} gaU1A"S}
file://fixdown 6h{>U*N"&d
private void fixDown(int k) { mae@L
int j; Y?xc#'
while ((j = k << 1) <= size) { eoxEnCU
if (j < size %26amp;%26amp; queue[j] j++; 't'2z
if (queue[k]>queue[j]) file://不用交换 K-4o_:F
break; RKD$'UWX
SortUtil.swap(queue,j,k); e1Bqd+
k = j; 7[It
} ,)Z1&J?
} -I.BQ
private void fixUp(int k) { !MEA@^$#
while (k > 1) { %&pd`A/
int j = k >> 1; !;M5.Y1j&"
if (queue[j]>queue[k]) Hl=M{)q@
break; (gjCm0#_%
SortUtil.swap(queue,j,k); KhZ\q|5
k = j; PXo^SHJ+gt
} KZ$^Q<d^
} ASULg{
~$]Puv1V>
} oL -udH
gIY]hC.
} 2aJ_[3p/h]
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SortUtil： npMPjknl
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package org.rut.util.algorithm; H'%#71
Yge}P:d9
import org.rut.util.algorithm.support.BubbleSort; tG*HUN?*
import org.rut.util.algorithm.support.HeapSort; .wf$]oQQ
import org.rut.util.algorithm.support.ImprovedMergeSort; ]BaK8mPl
import org.rut.util.algorithm.support.ImprovedQuickSort; CSlPrx2\
import org.rut.util.algorithm.support.InsertSort; /TY=ig1z
import org.rut.util.algorithm.support.MergeSort; #r'S@:[
import org.rut.util.algorithm.support.QuickSort; )uC5
import org.rut.util.algorithm.support.SelectionSort; Y} crE/
import org.rut.util.algorithm.support.ShellSort; lX/:e=
SY$%)(c8kL
/** gp NAM"
* @author treeroot |6 E !wW
* @since 2006-2-2 lD6PKZ\RIj
* @version 1.0 E{]PfUfFY
*/ Jp-6]uW
public class SortUtil { ,L-G-V+
public final static int INSERT = 1; 0`Y"xN`'i
public final static int BUBBLE = 2; M"5S
public final static int SELECTION = 3; A 1B_EX.
public final static int SHELL = 4; a\tv,Lx
public final static int QUICK = 5; _[,7DA.qc
public final static int IMPROVED_QUICK = 6; h~s h!W8
public final static int MERGE = 7; 5#Et.P'
public final static int IMPROVED_MERGE = 8; {!xDJnF;
public final static int HEAP = 9; nTCwLnX(O
~'0W(~Q8
public static void sort(int[] data) { Qq3UC%Z1
sort(data, IMPROVED_QUICK); 2q ~y\fe
} k;Ask#rs
private static String[] name={ =i>i,>bv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EM!9_8 f
}; VvTi>2(.
LTcZdQd$
private static Sort[] impl=new Sort[]{ zR5KC!xc
new InsertSort(), H0-v^H>^
new BubbleSort(), U:uFrb,
new SelectionSort(), YcN&\(
new ShellSort(), S@cKo&^
new QuickSort(), NE+ ;<mW
new ImprovedQuickSort(), g)nT]+&
new MergeSort(), }NKnV3G/Z
new ImprovedMergeSort(), ]K|td)1X
new HeapSort() .~fov8
}; (W5JVk_o
j> dL:V&`
public static String toString(int algorithm){ liPaT
return name[algorithm-1]; LN`Y`G|op
} w]O,xO
X9;51JV
public static void sort(int[] data, int algorithm) { <v3pI!)x
impl[algorithm-1].sort(data); 2#R8}\
} 3ICMH
l`."rei%)
public static interface Sort { >*WT[UU
public void sort(int[] data); Ca ?d8
} ?<1~KLPMhY
&{gy{npQ
public static void swap(int[] data, int i, int j) { mq+<2 S
int temp = data; x+EEMv3u:
data = data[j]; @|<qTci
data[j] = temp; ,&G!9}EC
} i0rh{Ko
} w+iIay