[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; %qsl<_&
} ?!m\|'s-
int i1=l; nGX3_-U4
int i2=mid+1; S~r75] "
for(int cur=l;cur<=r;cur++){ ].Bx"L!B
if(i1==mid+1) Xm<_!=
data[cur]=temp[i2++]; D]>Z5nr |
else if(i2>r) yk!K5
data[cur]=temp[i1++]; f4,|D |
else if(temp[i1] data[cur]=temp[i1++]; Q(A$ >A
else J e|
data[cur]=temp[i2++]; 3ouy-SQ
} k)z>9z%D
} >+<b_q|P
%yc-D]P/
} aZo}Ix:/
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改进后的归并排序: |3FGMg%
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package org.rut.util.algorithm.support; PN99 R]K0g
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import org.rut.util.algorithm.SortUtil; "N'W~XPG
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/** f.j<VKF}
* @author treeroot 3S#p4{3
* @since 2006-2-2 A|K=>7n]U
* @version 1.0 h$sOJs~6h
*/ !\VEUF,K?
public class ImprovedMergeSort implements SortUtil.Sort { s%rmfIp"
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private static final int THRESHOLD = 10; Nk7=[y#z
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/* 0datzEns`
* (non-Javadoc) "{+2Q
* y(iq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) THy?Y
*/ t@R n#(~"
public void sort(int[] data) { O..{wdZy
int[] temp=new int[data.length]; 5|jY
mergeSort(data,temp,0,data.length-1); a0k;way
} ]iW:YNvXA
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private void mergeSort(int[] data, int[] temp, int l, int r) { }M(xN6E
int i, j, k; y:Gn58\o
int mid = (l + r) / 2; ?Hdu=+ZV
if (l == r) bxwwYSS
return; z}==6|{
if ((mid - l) >= THRESHOLD) aso8,mpZuA
mergeSort(data, temp, l, mid); 6DU(KYN
else %=*|:v
insertSort(data, l, mid - l + 1); ?vbAaRg50s
if ((r - mid) > THRESHOLD) )w<Z4_!N4s
mergeSort(data, temp, mid + 1, r); 9iJ$M!
else Nw9:Gi
insertSort(data, mid + 1, r - mid); UpD4'!<buV
%t6-wWM97
for (i = l; i <= mid; i++) { >}+R+''nR
temp = data; :81d~f7
} {A< 961
for (j = 1; j <= r - mid; j++) { ckV\f({
temp[r - j + 1] = data[j + mid]; KkTE -$-
} w\D !e
int a = temp[l]; vw:GNpg'R6
int b = temp[r]; boDD?0.|
for (i = l, j = r, k = l; k <= r; k++) { \}4*}Lr
if (a < b) { \`z%5/@f;
data[k] = temp[i++]; 9MO=f^f-
a = temp; S,5>/'fy0
} else { .9Cy<z
data[k] = temp[j--]; WK?5`|1l:x
b = temp[j]; 3O-vO=D
} nql9SQ'\\
} oR~d<^z(
} nhMxw@Z\
xDl; tFI
/** &uc`w{,Zs
* @param data N.q*jY=X|
* @param l k18v{)i~
* @param i JF~9efWe>
*/ p/nATvh$
private void insertSort(int[] data, int start, int len) { o o'7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |/xx**?
} ZI1]B944ni
} e-v|
} }wp/,\_ >
} }ssja,;
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堆排序： l"+8>Mm
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package org.rut.util.algorithm.support; g-UCvY I
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import org.rut.util.algorithm.SortUtil; `V<jt5TS
7FY2a
/** K^@9\cl^
* @author treeroot @.i#uMWF`
* @since 2006-2-2 OE0G*`m
* @version 1.0 g"|>^90
*/ FP=27=
public class HeapSort implements SortUtil.Sort{ U/kQwrM
zdU46|!u
/* (non-Javadoc) AIn/v`JeX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EZjtZMnj
*/ h/{1(c}
public void sort(int[] data) { w< Xwz`O
MaxHeap h=new MaxHeap(); JttDRNZAU
h.init(data); ZQfPDH=
for(int i=0;i h.remove(); y9d"sqyh
System.arraycopy(h.queue,1,data,0,data.length); `#l3a
} (57!{[J
o<3$|`S&
private static class MaxHeap{ .1;UEb|T
;>5`Y8s6
void init(int[] data){ MIr+4L
this.queue=new int[data.length+1]; M.s'~S7y
for(int i=0;i queue[++size]=data; 1d FuoX
fixUp(size); 8 I_
} ,G}i:7
} [(3s5)O
*@PM,tS;
private int size=0; {]}94T~/k
7mdd}L^h Z
private int[] queue; K.mxF,H
:EQ{7Op`
public int get() { MaHP):~
return queue[1]; 7pY :.iVO
} hPNMp@Nm6
6uo;4}0
public void remove() { n}A!aC
SortUtil.swap(queue,1,size--); yCN_vrH>
fixDown(1); :zKMw=
} 4L8hn4F
file://fixdown R^/SBrWve
private void fixDown(int k) { /<8y>
int j; X)~wB7_0G
while ((j = k << 1) <= size) { 4RtAwB
if (j < size %26amp;%26amp; queue[j] j++; 7LrmI~P
if (queue[k]>queue[j]) file://不用交换 b\`S[
break; `a MU2
SortUtil.swap(queue,j,k); lcm[l
k = j; Z#H<+S(
} =s4(Y
} Lm2!<<<
private void fixUp(int k) { A|+QUPD
while (k > 1) { /IRXk[
int j = k >> 1; n:`f.jG |
if (queue[j]>queue[k]) [C0v-
break; 7LVG0A2>7
SortUtil.swap(queue,j,k); <OGG(dI
k = j; If,p!L
} 0Z6geBMc
} I@9'd$YY
Is7BJf
} R'tKJ_VI
rniM[7K
} [DM0'4
%k1Pyv;]
SortUtil： u>"0>U
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package org.rut.util.algorithm; [TFJb+N&
X^ Is-[OvE
import org.rut.util.algorithm.support.BubbleSort; ,.W7Z~z
import org.rut.util.algorithm.support.HeapSort; .M^[/!
import org.rut.util.algorithm.support.ImprovedMergeSort; tWIJ,_8l
import org.rut.util.algorithm.support.ImprovedQuickSort; =zyA~}M2
import org.rut.util.algorithm.support.InsertSort; BtC*]WB"_'
import org.rut.util.algorithm.support.MergeSort; 'q)g,2B%
import org.rut.util.algorithm.support.QuickSort; G7nhUg
import org.rut.util.algorithm.support.SelectionSort; [ncK+rGAc
import org.rut.util.algorithm.support.ShellSort; qy3@> 1G
rtj`FH??11
/** be,Rj,-
* @author treeroot 3J+2#ML
* @since 2006-2-2 @;bBc
* @version 1.0 ]oB~8d
*/ ]h,rgO;
public class SortUtil { L\PmT
public final static int INSERT = 1; clB K
public final static int BUBBLE = 2; ccHf+=
public final static int SELECTION = 3; zOs}v{8"
public final static int SHELL = 4; PVo7Sy!'H
public final static int QUICK = 5; 9aJIq{`E
public final static int IMPROVED_QUICK = 6; VIT|#
public final static int MERGE = 7; LWF,w7v[L
public final static int IMPROVED_MERGE = 8; r\;fyeH
public final static int HEAP = 9; :D)(3U5
xmvE*q"9]
public static void sort(int[] data) { LTTMa-]Yy
sort(data, IMPROVED_QUICK); fgdR:@]-
} wu)+n\mt'
private static String[] name={ EsMX#1>/m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -BSdrP|
}; Oo|PZ_P
Ur(R[*2bx
private static Sort[] impl=new Sort[]{ r0XEB,}
new InsertSort(), 2jFuF71
new BubbleSort(), u S1O-Q>
new SelectionSort(), }xk(aM_
new ShellSort(), 3#>W\_FY*D
new QuickSort(), oBkhb
new ImprovedQuickSort(), sE pI)9
new MergeSort(), !ajBZ>Q
new ImprovedMergeSort(), `5IrV&a
new HeapSort() i41~-?Bc
}; OM*c7&
4 O!2nP
public static String toString(int algorithm){ Tnp P'
return name[algorithm-1]; G](4!G&
} hO=L|BJ?I
.5(YL8d
public static void sort(int[] data, int algorithm) { K& #il
impl[algorithm-1].sort(data); zw>L0gC
} )XN_|zCk
4E39]vb
public static interface Sort { ]4l2jY
public void sort(int[] data); UTD_rQ
} hIJtu;}zU
}5;4'l8
public static void swap(int[] data, int i, int j) { >rCD5#DG
int temp = data; {o}U"b<+Ra
data = data[j]; ).SJ*Re*^I
data[j] = temp; k QuEG5n.-
} R~\R>\
} =yf)Z^