[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; {Q37a=;,
} NN2mOJ:-
int i1=l; ZfX$q\7
int i2=mid+1; UimofFmI%
for(int cur=l;cur<=r;cur++){ J _dgP[
if(i1==mid+1) 6pSTw\/6
data[cur]=temp[i2++]; 49M1^nMvoo
else if(i2>r) nIr`T^c9c
data[cur]=temp[i1++]; j`"!G*Vh
else if(temp[i1] data[cur]=temp[i1++]; #) :.1Z?
else %cg| KB"l
data[cur]=temp[i2++]; .{c7 I!8
} =]-z?O6^`
} ye=4<b_
A-:k4] {%P
} KpYezdPF)
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改进后的归并排序: `_1~[t
pZlsDM/=
package org.rut.util.algorithm.support; $A9Pi"/*z
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import org.rut.util.algorithm.SortUtil; ]vB\yQE
+a^gC
/** y]+5Y.Cw$
* @author treeroot k9OGnCW\
* @since 2006-2-2 "FA.T7G
* @version 1.0 >h\u[I$7
*/ Lo_+W1+
public class ImprovedMergeSort implements SortUtil.Sort { xx>hJ!
C 'MR=/sd
private static final int THRESHOLD = 10; 'nGUm[vh
,lA@C2c
/* OqIXFX"
* (non-Javadoc) 5N$XY@
* aIFlNS,y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ih/E,B"
*/ o ?vGI=
public void sort(int[] data) { Q17dcgd
int[] temp=new int[data.length]; |@'O3KA
mergeSort(data,temp,0,data.length-1); /P@%{y
} cZ?$_;=
3k9n*jY0
private void mergeSort(int[] data, int[] temp, int l, int r) { ap )B%9
int i, j, k; Uzzm2OS`
int mid = (l + r) / 2; s$>n U
if (l == r) <^Vj1s
return; :=;{w~D
if ((mid - l) >= THRESHOLD) z8ZQL.z%h
mergeSort(data, temp, l, mid); o zn&>k
else ceE]^X;p
insertSort(data, l, mid - l + 1); c?HUW
if ((r - mid) > THRESHOLD) ^@AyC"K
mergeSort(data, temp, mid + 1, r); RYEZ'<
else I:iMRvp
insertSort(data, mid + 1, r - mid); N4C7I1ihq
=n"kgn
for (i = l; i <= mid; i++) { |EX=Rj*
temp = data; KH;~VR8"/
} O6G'!h\F
for (j = 1; j <= r - mid; j++) { ]$Z:^"JS3
temp[r - j + 1] = data[j + mid]; s2G9}i{
} N$]er'`
int a = temp[l]; \\<=J[R.M
int b = temp[r]; &Q~W{.
for (i = l, j = r, k = l; k <= r; k++) { D?1fY!C:r
if (a < b) { ft(o-f7,
data[k] = temp[i++]; +m%%Bz>
a = temp; Icrnu}pl_
} else { N7J?S~x
data[k] = temp[j--]; 8^ f:-5
b = temp[j]; {:uv}4Z
} BNNM$.ZIQ
} rnj$u-8
} u3+B/ 5x
}psRgF
/** dJ6fPB|k
* @param data 0,t%us/q
* @param l '^_u5Y]
* @param i 7:u+cv
*/ hOAZvrfQ4
private void insertSort(int[] data, int start, int len) { ALTOi?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +_i{4Iz~p
} +n;nvf}(
} dn- [Gnde
} f<@!{y2Xe
} ^-~JkW'z
?x #K:a?
堆排序： zW%Em81Wd
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package org.rut.util.algorithm.support; Yn}Gj'
Re8x!e'>
import org.rut.util.algorithm.SortUtil; !Rl|o^Vw>{
NAvR^"I~
/** !|&|%x6@
* @author treeroot *tF~CG$r
* @since 2006-2-2 wL?Up>fr
* @version 1.0 o2ggHZe/=@
*/ Bxm,?=h
public class HeapSort implements SortUtil.Sort{ (CxA5u1|l
:uo1QavO@,
/* (non-Javadoc) $gBQ5Wd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R}=5:)%w
*/ ?ZRF]\dP]
public void sort(int[] data) { p5fr}#en
MaxHeap h=new MaxHeap(); :'Qiwf&
h.init(data); `sYFQ+D#O
for(int i=0;i h.remove(); M@A3+v%K
System.arraycopy(h.queue,1,data,0,data.length); aDNB~CwZZ
} ;yt6Yp.6e
?N<My&E
private static class MaxHeap{ ;9T}h2^`B
%f1%9YH
void init(int[] data){ >s{I@#9
this.queue=new int[data.length+1]; D9oNYF-V
for(int i=0;i queue[++size]=data; tbRW6
fixUp(size); V|MGG
} |qUGB.Q
} J;0;oXwJ<
|NfFe*q0;8
private int size=0; ^Qs}2%
'9V/w[mI
private int[] queue; Q4"\k. ?
+'?Qph6o,7
public int get() { | ;tH?E
return queue[1]; u<BU4c/p
} -&8( MT*
nHm}^.B*+
public void remove() { `$6o*g>:
SortUtil.swap(queue,1,size--); &n k)F<
fixDown(1); Lj1l]OD
} ;?2)[a
file://fixdown cJ96{+
private void fixDown(int k) { p`Pa;=L
int j; ~$HB}/
while ((j = k << 1) <= size) { Y_'ERqQ
if (j < size %26amp;%26amp; queue[j] j++; n N<N~
if (queue[k]>queue[j]) file://不用交换 7s|'NTp
break; I@'[>t
SortUtil.swap(queue,j,k); 6Xvpk1
k = j; ]<f)Rf">:`
} >H;i#!9,
} FQ<-Wc
private void fixUp(int k) { 7]h%?W!
while (k > 1) { ]ZY2\'
int j = k >> 1; $xbC^ k
if (queue[j]>queue[k]) 9pp+<c
break; ;28d7e}
SortUtil.swap(queue,j,k); *r`=hNr
k = j; Hy.u6Jt*/
} A5XMA|2_
} (0$~T}lH
Bs~~C8+
} n1f8jS+'}
]" 'yf;g
} @Po5AK3cy
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SortUtil： -N45ni87
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package org.rut.util.algorithm; gmL~n7m:K
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import org.rut.util.algorithm.support.BubbleSort; Vm[Rp,"
import org.rut.util.algorithm.support.HeapSort; .a*?Pal@@
import org.rut.util.algorithm.support.ImprovedMergeSort; nh} Xu~#_
import org.rut.util.algorithm.support.ImprovedQuickSort; j_8 YFz5
import org.rut.util.algorithm.support.InsertSort; Cy~IB [
import org.rut.util.algorithm.support.MergeSort; o7) y~ ke
import org.rut.util.algorithm.support.QuickSort; 8 1,N92T5
import org.rut.util.algorithm.support.SelectionSort; ZoG@"vr2
import org.rut.util.algorithm.support.ShellSort; 9c>i>Vja!
zwfft
/** HXLnjXoe
* @author treeroot 6>vR5pn
* @since 2006-2-2 FOTe,F.8
* @version 1.0 C(N'=-;Kl
*/ %rW}x[M%w?
public class SortUtil { my'nDi
public final static int INSERT = 1; "<CM'R
public final static int BUBBLE = 2; }.&nEi`
public final static int SELECTION = 3; clE9I<1v
public final static int SHELL = 4; VeA@HC`?"
public final static int QUICK = 5; ^)AECn
public final static int IMPROVED_QUICK = 6; V*p[6{U0
public final static int MERGE = 7; n ay\)
public final static int IMPROVED_MERGE = 8; HsCL%$k
public final static int HEAP = 9; voa)V1A/]
O=0p}{3l
public static void sort(int[] data) { 8em'7hR9
sort(data, IMPROVED_QUICK); L AQ@y-K3
} 7+jxf[(XQ
private static String[] name={ Wg-mJu(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r&u1-%%9[
}; F @PPhzZ
iQG!-.aX
private static Sort[] impl=new Sort[]{ tr0b#4
new InsertSort(), a"#t'\
new BubbleSort(), ;d?BVe?
new SelectionSort(), Xb_ V\b0
new ShellSort(), S:xXD^n#H
new QuickSort(), Hg#tSE
new ImprovedQuickSort(), c1H.v^Y5
new MergeSort(), 2q?/aw ;Z
new ImprovedMergeSort(), {]CZgqE{
new HeapSort() vt EfH
}; CmU@8-1
W{,fpm
public static String toString(int algorithm){ Hv/C40uM-
return name[algorithm-1]; eR!#1ar
} JYdb^j2c
FnGKt\
public static void sort(int[] data, int algorithm) { 1c$pz:$vX
impl[algorithm-1].sort(data); BtJkvg(2]
} j+jC J<
j*%#~UFw
public static interface Sort { ndSu-8?L
public void sort(int[] data); E>fY,*0
} nW=6nCyvo
x;mw?B[
public static void swap(int[] data, int i, int j) { xdSMYH{2A
int temp = data; z g7Q`
data = data[j]; YD4I2'E
data[j] = temp; $Itmm/M
} "*lx9bvV_
} WBjJ)vCA.