[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; IytDvz*|
} $T?]+2,6;
int i1=l; cv]BV>=E
int i2=mid+1; V:OiW"/
for(int cur=l;cur<=r;cur++){ Jr]gEBX
if(i1==mid+1) *!w25t
data[cur]=temp[i2++]; 68p R:
else if(i2>r) F_v-}bbcFQ
data[cur]=temp[i1++]; T{tn.sT
else if(temp[i1] data[cur]=temp[i1++]; 7*/J4MN
else |g!`\@O
data[cur]=temp[i2++]; s%O Y<B@V2
} 4vLw?_".
} >L=;"+B0U&
modC6d%
} "W5rx8a
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改进后的归并排序: ?2ItTrlB
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package org.rut.util.algorithm.support; Gc'M[9Mh
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import org.rut.util.algorithm.SortUtil; o<rsAe
nE$ f
/** j;+["mi
* @author treeroot `BjR.xMv
* @since 2006-2-2 Zw#<E =\
* @version 1.0 U<rI!!#9
*/ Pj&A=
public class ImprovedMergeSort implements SortUtil.Sort { r**f,PDZ
Bzw19S6y
private static final int THRESHOLD = 10; {[P!$ /
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/* \7 Gz\=\LR
* (non-Javadoc) 1O0X-C,wo$
* 8#l+{`$z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /?P!.!W&
*/ K{2h9 ]VF
public void sort(int[] data) { 0m A(:"
int[] temp=new int[data.length]; , D"]y~~I5
mergeSort(data,temp,0,data.length-1); (:n|v%
} #w|5jN?
MMd.0JuaO
private void mergeSort(int[] data, int[] temp, int l, int r) { `XgFga)
int i, j, k; B`1kGEx .
int mid = (l + r) / 2; ?-,6<K1
if (l == r) j^nu|
return; \c%g M1
if ((mid - l) >= THRESHOLD) 9@'4P
mergeSort(data, temp, l, mid); hl]S'yr
else !}t-j3bCs
insertSort(data, l, mid - l + 1); V%51k{
if ((r - mid) > THRESHOLD) r]T0+oQ>
mergeSort(data, temp, mid + 1, r); T,OS0;7O
else !^?qU;|
insertSort(data, mid + 1, r - mid); kP^*hO!%
CmHyAw(
for (i = l; i <= mid; i++) { `{o$F ::(
temp = data; RG}}Oh="v
} ,H{={aln
for (j = 1; j <= r - mid; j++) { d}+W"j;
temp[r - j + 1] = data[j + mid]; QNpuTZn#Q
} bLlH//ZRH
int a = temp[l]; (NaK3_
int b = temp[r]; "V}qf3qU
for (i = l, j = r, k = l; k <= r; k++) { J@Yj\9U
if (a < b) { 4K7{f+T
data[k] = temp[i++]; cz(G]{N
a = temp; 2Wl{Br.
} else { FM\[].
data[k] = temp[j--]; X~L!e}Rz
b = temp[j]; ~OCZz$qA
} H+x#gK2l
} cmDT +$s
} +`}o,z/^
N2FbrfNFa
/** ;s_"{f`Y6
* @param data !8/gL
* @param l 6$RpV'xz
* @param i &F6C
*/ K*+6`z#fMF
private void insertSort(int[] data, int start, int len) { +|&0fGv;d9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LGVlc@0'
} |,sMST%
} $^h?:L:1n
} B}\BeFt'
} -N# #w=
J\A8qh8
堆排序： /b%Q[ Ck_
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package org.rut.util.algorithm.support; }-nU3{1
WcEt%mGQ,
import org.rut.util.algorithm.SortUtil; Nfb`YU=
X-/Ban
/** bVK$.*,
* @author treeroot }_%P6
* @since 2006-2-2 {y-`QS
* @version 1.0 (p,}'I#i*
*/ #pA[k-
public class HeapSort implements SortUtil.Sort{ #>[wD#XJV
eY}V9*.v
/* (non-Javadoc) wS$46M<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u"FjwF?
*/ "b%FmM
public void sort(int[] data) { 0( //D;j
MaxHeap h=new MaxHeap(); WeVi]n
h.init(data); 39D }
for(int i=0;i h.remove(); s|2}2<+
System.arraycopy(h.queue,1,data,0,data.length); PGX+p+wB
} Uw <{i
GOVAb'
private static class MaxHeap{ ti9}*8
;_tO+xL&
void init(int[] data){ ,8##OB(
this.queue=new int[data.length+1]; DsQ/aG9c%
for(int i=0;i queue[++size]=data; _yVPpA[a
fixUp(size); 4f {+pf^R
} c0[k T
} Zi{0-m6+
~gddcTp
private int size=0; 'n4u-pM(nB
I7G,`h+H
private int[] queue; xZ+]QDKC
@O/,a7Tt
public int get() { T|bZ9_?+2
return queue[1]; \_U*t!
} &t_h'JX&
c#pj:f*H
public void remove() { (.Xr#;\(
SortUtil.swap(queue,1,size--); t)r1"oA
fixDown(1); D^$OCj\
} -9-fX(I
file://fixdown ~ 5"J(
private void fixDown(int k) { [hHG.
int j; jVYH;B%%z
while ((j = k << 1) <= size) { w+_Wc~f
if (j < size %26amp;%26amp; queue[j] j++; 7#pZa.B)k
if (queue[k]>queue[j]) file://不用交换 }4h0bI
break; ym%o}(v-
SortUtil.swap(queue,j,k); d~`-AC+
k = j; n(R_#,Hs
} D]u=PqHk2
} dtTlIhh1V
private void fixUp(int k) { ~6d5zI4\
while (k > 1) { plXG[1;&G
int j = k >> 1; jONjt(&N
if (queue[j]>queue[k]) xR}of"
break; K)5;2lN,
SortUtil.swap(queue,j,k); fl)zQcA
k = j; d?7BxYaa
} V(..8}LlD
} E}$V2ha0zu
Z,aGtJ.a'9
} %U?)?iZdL
oMc1:=EG
} 40.AM1Z0f
hdg<bZk:
SortUtil： v[L[A3`"/
P)1EA;
package org.rut.util.algorithm; ?Ib}
b:Dg}
import org.rut.util.algorithm.support.BubbleSort; / O)6iJ
import org.rut.util.algorithm.support.HeapSort; 0N5bPb
import org.rut.util.algorithm.support.ImprovedMergeSort; !Uy>eji}
import org.rut.util.algorithm.support.ImprovedQuickSort; )!,@m>0v{
import org.rut.util.algorithm.support.InsertSort; j38 6gL
import org.rut.util.algorithm.support.MergeSort; yjpz_<7a=
import org.rut.util.algorithm.support.QuickSort; f_'"KF[%
import org.rut.util.algorithm.support.SelectionSort; j^I!6j=ZX
import org.rut.util.algorithm.support.ShellSort; +-ewE-:|L
z!Hx @){|
/** 8ds}+TtbY
* @author treeroot )X%oXc&C|
* @since 2006-2-2 P` ]ps?l
* @version 1.0 fIkT"?
*/ 3EOyq^I%
public class SortUtil { }]GbUC!Zb
public final static int INSERT = 1; J6auUm` `
public final static int BUBBLE = 2; 4J}3,+
public final static int SELECTION = 3; L[.<o{
public final static int SHELL = 4; rr )/`Kmv%
public final static int QUICK = 5; u){S$</
public final static int IMPROVED_QUICK = 6; %zflx~
public final static int MERGE = 7; OG}KqG!n
public final static int IMPROVED_MERGE = 8; mz-N{>k
public final static int HEAP = 9; "tX7%(
h2;l1G,
public static void sort(int[] data) { QgZJ`G--
sort(data, IMPROVED_QUICK); vJThU$s-
} vZk9gGjk
private static String[] name={ `^e*T'UPl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C P&o%Uc*
}; )_Iz>)
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private static Sort[] impl=new Sort[]{ 3'^S3W%
new InsertSort(), 3?^NN|xg
new BubbleSort(), r=\P!`{5
new SelectionSort(), zq=&4afOE
new ShellSort(), JWWInuH
new QuickSort(), {*fUJmao"
new ImprovedQuickSort(), 5M.Red.L
new MergeSort(), 5Pqt_ZWy
new ImprovedMergeSort(), O! (85rp/
new HeapSort() H &fTh
}; nl9kYE [
c(&AnIlS
public static String toString(int algorithm){ rkIMM,
return name[algorithm-1]; |0]YA
} 1tyNRoET
$eMK{:$O
public static void sort(int[] data, int algorithm) { eI?HwP{m
impl[algorithm-1].sort(data); 5p{25N_t
} #G~wE*VR$
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public static interface Sort { Gym#b{#":
public void sort(int[] data); ZQ|gt*
} `#p< rfe
9C=~1>S
public static void swap(int[] data, int i, int j) { b~9`]+
int temp = data; mF~ys{"t
data = data[j]; 5\3 swP_7
data[j] = temp; m{O Dz:
} MYu`c[$jZ
} ydyG}XI7V