[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; WH F>J
} qRMH[F$`
int i1=l; t'@1FA!)
int i2=mid+1; {'W\~GnZ
for(int cur=l;cur<=r;cur++){ *@J
if(i1==mid+1) $gsn@P>"
data[cur]=temp[i2++]; ,nqG* o
else if(i2>r) RW!D!~
data[cur]=temp[i1++]; +kF$I7LN
else if(temp[i1] data[cur]=temp[i1++]; =(kwMJ
else (>*<<a22
data[cur]=temp[i2++]; JO:40V?op
} k^3|A3A
} `3!ERQU
9QaEUy*,
} ,Mf@I5?
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改进后的归并排序: D*d@<&Bl4<
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package org.rut.util.algorithm.support; $QQv$
bd[zdL#4K
import org.rut.util.algorithm.SortUtil; k,>sBk8
A~ugx~S0
/** .YquOCc(
* @author treeroot \>NjeMuWU
* @since 2006-2-2 j%R}
* @version 1.0 )--v>*,V
*/ L^:+8g
public class ImprovedMergeSort implements SortUtil.Sort { 8fzmCRFH
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private static final int THRESHOLD = 10; ,5" vzGLJ
Y|FJ1x$r
/* IS0RhtGy/
* (non-Javadoc) ~c7}eTJd"
* S_cba(0-|\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MF/359r)Et
*/ Ob+L|FbnN
public void sort(int[] data) { EB'(%dH
int[] temp=new int[data.length]; tp2CMJc{L
mergeSort(data,temp,0,data.length-1); ;\=W=wL(
} hv 18V>8
f/G YDat
private void mergeSort(int[] data, int[] temp, int l, int r) { "=I ioY
int i, j, k; lJ!+n<K+
int mid = (l + r) / 2; {uEu ^6a5
if (l == r) J2_DP
return; T_CYSS|fX
if ((mid - l) >= THRESHOLD) s$e0;C!D
mergeSort(data, temp, l, mid); @)mH"u!(7
else K1O0/2O
insertSort(data, l, mid - l + 1); |,F/_
if ((r - mid) > THRESHOLD) )P\Vd #
mergeSort(data, temp, mid + 1, r); ,mH2S/<}S
else ]Lq9Ompf(t
insertSort(data, mid + 1, r - mid); cCN[c)[c|
b]hP;QK`U$
for (i = l; i <= mid; i++) { 2`,{IHu*!
temp = data; 0IoS|P}6a
} IH?.s k
for (j = 1; j <= r - mid; j++) { F,^Q'$!
temp[r - j + 1] = data[j + mid]; HaI
} /C29^P
int a = temp[l]; &Mbpv)V8
int b = temp[r]; #imMkvx?
for (i = l, j = r, k = l; k <= r; k++) { ETe,RY
if (a < b) { 8Z%C7 "4O
data[k] = temp[i++]; RO,
a = temp; I3o6ym-i
} else { S/pTFlptCa
data[k] = temp[j--]; ;3NA,JA#Y
b = temp[j]; )|f!}( p
} rkW*C'2fz
} @~Z:W<X
} %\-u&
Kl~jcq&z
/** O`-JKZc
* @param data RS@*/.]o
* @param l U]Q2EL\%
* @param i {zhN>n_
*/ i[)H!%RV*
private void insertSort(int[] data, int start, int len) { iF2/:iP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y8jk9Tv
} -8&M^-
} t5n$sF
} ,6?L.L
} +avu&2B
rwr>43S5<3
堆排序： _O~DJ"
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package org.rut.util.algorithm.support; s)W^P4<
8E1swH5z
import org.rut.util.algorithm.SortUtil; 3=V79&
NK'awv),pM
/** iO4YZ!
* @author treeroot t>><|~wp
* @since 2006-2-2 tn201TDZ]=
* @version 1.0 j.X3SQb4G
*/ 1QXv}36#3n
public class HeapSort implements SortUtil.Sort{ Ak[}s|,)
=rcqYPul0
/* (non-Javadoc) O#fGHI<43[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X2!vC!4P?L
*/ 5F$ elW
public void sort(int[] data) { \gy39xoW(
MaxHeap h=new MaxHeap(); pA9^-:\*
h.init(data); io^^f|
for(int i=0;i h.remove(); EXUjdJs"
System.arraycopy(h.queue,1,data,0,data.length); 5 rkIK
} Kf D8S
hkeOe
private static class MaxHeap{ jI!}}K)d
wN8-Me
void init(int[] data){ Hj"`z6@7
this.queue=new int[data.length+1]; _c?&G`
for(int i=0;i queue[++size]=data; J<BBM.^]
fixUp(size); b_@MoL@A!
} dM8`!~#&PI
} w$4fS
}7E2,A9_"
private int size=0; !},_,J~(|
=dz iR_
private int[] queue; Jj}+tQf
w=I8f}(
public int get() { Zo}wzY~x>I
return queue[1]; {j.5!Nj]B
} <[Ae0UK
RSXYz8{
public void remove() { yZ=wT,Y
SortUtil.swap(queue,1,size--); `=8g%O|T
fixDown(1); s,O:l0
} Q1? !,a
file://fixdown Nw'i;}0v7r
private void fixDown(int k) { e*.l6H/B
int j; 6VpT*,2d~
while ((j = k << 1) <= size) { ^6`"f
if (j < size %26amp;%26amp; queue[j] j++; f}b= FV{
if (queue[k]>queue[j]) file://不用交换 21x?TZa
break; -Zd0[& ']
SortUtil.swap(queue,j,k); 3 4CqLPg8
k = j; rkh+$*t@i7
} :hB/|H*=
} ~#+ Hhc(
private void fixUp(int k) { JSCe86a7<E
while (k > 1) { hDI_qZ
int j = k >> 1; M \rW
if (queue[j]>queue[k]) Kf#9-.}?
break; S*<+vIo
SortUtil.swap(queue,j,k); 7<['4*u
k = j; 1*<m,.$
} jh\L)a*
} W3K?K-
$-'p6^5
} tb#. Y
5SKj% %B2,
} :clMO|
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SortUtil： CL oc
+@>K]hdr
package org.rut.util.algorithm; 9T#d.c24
o_hk!s^4m
import org.rut.util.algorithm.support.BubbleSort; =NxT9$V
import org.rut.util.algorithm.support.HeapSort; zsnXPRF
import org.rut.util.algorithm.support.ImprovedMergeSort; WVlyR\.
import org.rut.util.algorithm.support.ImprovedQuickSort; GF[onfQY7
import org.rut.util.algorithm.support.InsertSort; $ \0)~cy
import org.rut.util.algorithm.support.MergeSort; X@JrfvKv[d
import org.rut.util.algorithm.support.QuickSort; Kk|uN#m
import org.rut.util.algorithm.support.SelectionSort; 1 i # .h$
import org.rut.util.algorithm.support.ShellSort; <hazrKUn
+ >?"P^
/** gwwYz]'d>r
* @author treeroot mb_*FJB-_
* @since 2006-2-2 $|-joY
* @version 1.0 }cuU5WQ?%
*/ `) s]T.-
public class SortUtil { ]Gm"U!h*
public final static int INSERT = 1; LRl2@&z<
public final static int BUBBLE = 2; @%mJw u
public final static int SELECTION = 3; YD1 :m3l!
public final static int SHELL = 4; X,dOF=OJL
public final static int QUICK = 5; iX,|;J|]
public final static int IMPROVED_QUICK = 6; v.Wkz9 w}
public final static int MERGE = 7; seO7/h_a
public final static int IMPROVED_MERGE = 8; KLi&TmIB
public final static int HEAP = 9; YJi C}.4Q
]/>(C76
public static void sort(int[] data) { iQs7Ly"
sort(data, IMPROVED_QUICK); Kv3cKNvu~
} @X\-c2=
private static String[] name={ SJ4[n.tPI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q@zD'G>
}; ha_&U@w
. Z 93S|q
private static Sort[] impl=new Sort[]{ NJ\ID=3l
new InsertSort(), n@IpO i$Q
new BubbleSort(), ^)|8N44O
new SelectionSort(), `rEu8u
new ShellSort(), c!n\?lB
new QuickSort(), T 2Uu/^
new ImprovedQuickSort(), 8bT]NvCA
new MergeSort(), Hxe!68{aR
new ImprovedMergeSort(), ; C/:$l
new HeapSort() q5<'pi
}; BVAxeXO
(/6~*<ZGT
public static String toString(int algorithm){ k$j4~C'$
return name[algorithm-1]; Kxs_R#k
} >6xZF'4
rt-^?2c?
public static void sort(int[] data, int algorithm) { yr=$a3web;
impl[algorithm-1].sort(data); K)!yOa'fH
} ?J[m)Uo/K
"_!D b&AH
public static interface Sort { GZ xG!r-
public void sort(int[] data); 3^NHVg
} BC|=-^(
[Aqy%mbG
public static void swap(int[] data, int i, int j) { :Y/>] tS4
int temp = data; VHwAO:+-
data = data[j]; _`'VOY`o
data[j] = temp; Wx~N1+
} _J' _9M?>
} Vu6$84>-,