[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; c6AwO?x/
} &eqqgLz
int i1=l; VTY #{
int i2=mid+1; yXqC
for(int cur=l;cur<=r;cur++){ Z4E6J'B8
if(i1==mid+1) i0*Cs#(=h
data[cur]=temp[i2++]; 1/&^~'
else if(i2>r) :))&"GY
data[cur]=temp[i1++]; y]+[o1]-c
else if(temp[i1] data[cur]=temp[i1++]; 0d1!Q!PH3
else @"wX#ot
data[cur]=temp[i2++]; 2 /*z5
} :qzhkKu
} $s-B
5evk_f
} )>"pm{g2
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改进后的归并排序: QpRk5NeLe
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package org.rut.util.algorithm.support; Z^=(9:
GG-b)64h`
import org.rut.util.algorithm.SortUtil; YB!f=_8
hpYv*WH:
/** 0AF,} &$
* @author treeroot D,|TQQ
* @since 2006-2-2 S%B56|'
* @version 1.0 atw*t1)g
*/ L3'isaz&^
public class ImprovedMergeSort implements SortUtil.Sort { >AY9F|:
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private static final int THRESHOLD = 10; [_(uz,'
Bjj=UtI
/* y>#kT
* (non-Javadoc) BE],PCpPr
* [2>zaag
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _MuzD&^qE
*/ /q,=!&f2
public void sort(int[] data) { ?L H[,8z
int[] temp=new int[data.length]; AK%&Kq&PaY
mergeSort(data,temp,0,data.length-1); Iza;~8dH5
} dw!Xt@,[g{
mAY/J0_
private void mergeSort(int[] data, int[] temp, int l, int r) { 0>D*d'xLd
int i, j, k; DiY74D
int mid = (l + r) / 2; #W l^!)#j?
if (l == r) o|c&$)m
return; *uP;rUY
if ((mid - l) >= THRESHOLD) !'IZr{Y>
mergeSort(data, temp, l, mid); qm'@o -[
else L{l}G,j<
insertSort(data, l, mid - l + 1); v6|[p
if ((r - mid) > THRESHOLD) %cDDu$9;
mergeSort(data, temp, mid + 1, r); iTs"RW
else 2"j&_$#l5X
insertSort(data, mid + 1, r - mid); 2PUB@B' +
l@u "iGw
for (i = l; i <= mid; i++) { g>eWX*Pa|
temp = data; c* ~0R?
} e%4vvPp
for (j = 1; j <= r - mid; j++) { 4>fj@X(3
temp[r - j + 1] = data[j + mid]; m!!;CbPo
} .y_~mr&d
int a = temp[l]; wV{j CQ
int b = temp[r]; k`]76C7
for (i = l, j = r, k = l; k <= r; k++) { 'MB+cz+v
if (a < b) { zQt)>Qx_
data[k] = temp[i++]; Zm|il9y4m
a = temp; 'O9Yu{M
} else { 2`ERrh^i"
data[k] = temp[j--]; N1'Yo:_A
b = temp[j]; q$IU!I4
} p)"EenUK
} 0"+QWh
} R$MR|
(Ia:>ocE0
/** D62'bFB^
* @param data jv1p'qs4
* @param l ~7Nqwwx
* @param i Vhb~kI!x
*/ @y0kX<M
private void insertSort(int[] data, int start, int len) { gu'+kw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <Nc9F['&#
} IF//bgk-
} Et}%sdS
} y^kC2DS
} 2"P1I
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堆排序： S_VzmCi
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package org.rut.util.algorithm.support; ZX{eggXl
w>Ft5"z
import org.rut.util.algorithm.SortUtil; b+Vlq7Bc
SL^%Zh/~
/** miCY?=N`
* @author treeroot G`;mSq6i
* @since 2006-2-2 R\$6_
* @version 1.0 f)Z'#[A*t7
*/ 2elj@EB,M
public class HeapSort implements SortUtil.Sort{ y6s/S.
Gt!Hm(
/* (non-Javadoc) E!I4I'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AJRiwP|H+
*/ 8@T0]vH&
public void sort(int[] data) { k<"N^+GSz
MaxHeap h=new MaxHeap(); +ZBj_Vw*|
h.init(data); :X*uE^bH
for(int i=0;i h.remove(); MUN:}S
System.arraycopy(h.queue,1,data,0,data.length); SBw'z(U
} jar?"o
W`n_m&Y\
private static class MaxHeap{ ' 94HVag
I&x69
void init(int[] data){ Ac[;S!R
this.queue=new int[data.length+1]; `WQpGBS_z_
for(int i=0;i queue[++size]=data; dsbz\w3:
fixUp(size); 0XL[4[LdA
} Yt4v}{+
} a$6pA@7}
q#Ik3 5
private int size=0; o`}8ZtD
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private int[] queue; {Z[kvXf"mZ
$g#d1u0q
public int get() { rO1.8KKJ
return queue[1]; [@s5v
} mOYXd,xd
'9|R7
public void remove() { `"bp-/
SortUtil.swap(queue,1,size--); %,)Xi
fixDown(1); @jD19=
} nON"+c*
file://fixdown .>(qZEF
private void fixDown(int k) { K%vGfQ8Er-
int j; NMP*q @
while ((j = k << 1) <= size) { ;!>>C0s"
if (j < size %26amp;%26amp; queue[j] j++; y? 65*lUl
if (queue[k]>queue[j]) file://不用交换 W@FGU
break; I~c}&'V
SortUtil.swap(queue,j,k); %M05& <
k = j; E`uK7 2j
} /M_kJe,%
} !E\J`K0_e
private void fixUp(int k) { XpOQBXbt
while (k > 1) { qk(u5Z
int j = k >> 1; H*>5ne=x
if (queue[j]>queue[k]) E}=F
break; )$I"LyK)
SortUtil.swap(queue,j,k); ,Onu%
k = j; W-ECmw(
} woK?td|/
} v_@&#!u`
p&;,$KDA
} 3Kum
.DHRPel
} 4'# _b
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SortUtil： #Y<b'7yJ
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package org.rut.util.algorithm; ZpY"P6
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import org.rut.util.algorithm.support.BubbleSort; L"!BN/i_
import org.rut.util.algorithm.support.HeapSort; S-+^L|
import org.rut.util.algorithm.support.ImprovedMergeSort; gs77")K&
import org.rut.util.algorithm.support.ImprovedQuickSort; U z6XQskX
import org.rut.util.algorithm.support.InsertSort; qT L@N9
import org.rut.util.algorithm.support.MergeSort; b%,`;hy{
import org.rut.util.algorithm.support.QuickSort; I^6zUVH
import org.rut.util.algorithm.support.SelectionSort; 'H,l\i@"
import org.rut.util.algorithm.support.ShellSort; v4Q8RE?
!xK`:[B
/** ^UK6q2[
* @author treeroot /P|jHK|{
* @since 2006-2-2 xTL"%'|
* @version 1.0 ]={{$}8.
*/ 2xd G&}$fa
public class SortUtil { ",T-'>h$2R
public final static int INSERT = 1; `W8dayZt
public final static int BUBBLE = 2; oFV>b
public final static int SELECTION = 3; w#,C{6
public final static int SHELL = 4; !(Y23w*
public final static int QUICK = 5; H;$OCDRC
public final static int IMPROVED_QUICK = 6; `D%bZ%25c
public final static int MERGE = 7; ,tL<?6_
public final static int IMPROVED_MERGE = 8; PZ"=t!
public final static int HEAP = 9; =6TD3k6(2
ZOG6
public static void sort(int[] data) { OE/O:F:1j
sort(data, IMPROVED_QUICK); @vaK-&|#$
} v7/qJ9l
private static String[] name={ jC<!Ny-$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i4N'[ P}
}; eVDI7W:(Sn
<gKT7ONtg
private static Sort[] impl=new Sort[]{ ?j8F5(HF?
new InsertSort(), b{t'Doe
new BubbleSort(), a<M<) {$u
new SelectionSort(), .4~n|d>z
new ShellSort(), M:qeqn+
new QuickSort(), R1FBH:Iu
new ImprovedQuickSort(), W9?Vh{w
new MergeSort(), kQ~*iY
new ImprovedMergeSort(), |[?"$g9v
new HeapSort() ;K0kQ<y-Y
}; hX]vZR&R
%uyRpG3,
public static String toString(int algorithm){ hof:+aW
return name[algorithm-1]; [dL4u^]{
} Z| Z447_
_rK}~y=0
public static void sort(int[] data, int algorithm) { `Xnu("w)
impl[algorithm-1].sort(data); .S17O}
} %J?;@ G)r
E3y"
public static interface Sort { <IGQBu#ZH
public void sort(int[] data); SqTO~zGC
} i!<,8e=
` IiAtS
public static void swap(int[] data, int i, int j) { U&|=dH]-
int temp = data; j9sf~}D>
data = data[j]; # &o3[.)9
data[j] = temp; z1?7}9~`0c
} AW4N#gt8',
} AxUj CerNf