[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; mNsd&Rk'
} aMGyV"6(-6
int i1=l; F\jawoO9
int i2=mid+1; 0Bk-)z|V
for(int cur=l;cur<=r;cur++){ viJP6fh
if(i1==mid+1) Yy;BJ_
data[cur]=temp[i2++]; S%e)br}
else if(i2>r) 1B@7#ozWA?
data[cur]=temp[i1++]; 5?0~7^de
else if(temp[i1] data[cur]=temp[i1++]; Pj_*,L`mZ
else -`NzBuV$2,
data[cur]=temp[i2++]; ,YJn=9pTl
} 9ji`.&#
} =mSu^q(l
MY^o0N
} ;0`IFtz
S|fb'
改进后的归并排序: y8Rq2jI;(e
csA-<}S5]b
package org.rut.util.algorithm.support; @1i<=r
AY;[v.Ff4
import org.rut.util.algorithm.SortUtil; R:rols"QM
/.~zk(-&h
/** \Yn0|j>
* @author treeroot 5~d=,;yE
* @since 2006-2-2 Xpt9$=d
* @version 1.0 Xc4zUEO9
*/ }Syd*%BR[
public class ImprovedMergeSort implements SortUtil.Sort { IZGRQmi"
//RD$e?h~
private static final int THRESHOLD = 10; zN=s]b=/
yMC6 Gvp
/* de;CEm<n
* (non-Javadoc) Vt,P.CfdC
* !N!AO(Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )Cat$)I#,
*/ qj4jM7
public void sort(int[] data) { w"W;PdH)
int[] temp=new int[data.length]; P#V}l'j(<a
mergeSort(data,temp,0,data.length-1); lPrAx0m13%
} >x6)AH.
@>8{J6%\
private void mergeSort(int[] data, int[] temp, int l, int r) { ou{V/?rb
int i, j, k; :, 3S5!(y
int mid = (l + r) / 2; :^-\KE`3
if (l == r) 7u rD
return; dn:\V?9
if ((mid - l) >= THRESHOLD) K=r~+4F
mergeSort(data, temp, l, mid); 9m\Yi
else uKj(=Rqq
insertSort(data, l, mid - l + 1); KzJJ@D*4M]
if ((r - mid) > THRESHOLD) Q- w_@~
mergeSort(data, temp, mid + 1, r); /`0>U
else Z>l<.T"t'
insertSort(data, mid + 1, r - mid); FGhnK'
A~^x*#q{4
for (i = l; i <= mid; i++) { NNwGRoDco
temp = data; eNO[ikm
} _'<FBlIN
for (j = 1; j <= r - mid; j++) { LOr(HgyC
temp[r - j + 1] = data[j + mid]; }8s&~fH
} '=eVem=
int a = temp[l]; gVy`||z
int b = temp[r]; 4#:C t* f
for (i = l, j = r, k = l; k <= r; k++) { SBdd_Fn
if (a < b) { ;),,Hk
data[k] = temp[i++]; Wyow MFp
a = temp; 7#Uzz"^
} else { Mvp|S.
data[k] = temp[j--]; jc\y{I\
b = temp[j]; /5Vv5d/Z4!
} Z@%A(nZ_
} 1=C<aRZ b^
} {wgq>cb
JT~Dr KI_
/** jQ7-M4qO/
* @param data Mz+vT0
* @param l )vpYVr-
* @param i wQ~]VVRN
*/ ggm'9|
private void insertSort(int[] data, int start, int len) { lL 50PU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lR9uD9Dr
} bUds E1f
} ] W$V#
} * dk(<g=fM
} JIHIKH-#
Bk^o$3#
堆排序： F S$8F
mlUj%:Gm#
package org.rut.util.algorithm.support; G \Nnw==v
d @ l
import org.rut.util.algorithm.SortUtil; p L^3*B.Nr
`M. I.Z_
/** k*!iUz{]
* @author treeroot +@H{H2J4
* @since 2006-2-2 M{jq6c
* @version 1.0 `%EcQ}Nr
*/ 8R-;cBT
public class HeapSort implements SortUtil.Sort{ 5uOz#hN
mdo$d-d&
/* (non-Javadoc) 4sW~7:vU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cMoJHC,!
*/ -t>"s'kv
public void sort(int[] data) { ]0[ot$Da6
MaxHeap h=new MaxHeap(); Plhakngj
h.init(data); 6j+X@|2^
for(int i=0;i h.remove(); +_u~Np
System.arraycopy(h.queue,1,data,0,data.length); K5t.OAA:
} F?0Q AA
ao[yHcAs
private static class MaxHeap{ g}uSIv^
>"|t*kS
void init(int[] data){ tmM; Z(9t
this.queue=new int[data.length+1]; Y>ATL
for(int i=0;i queue[++size]=data; 3-)}.8F
fixUp(size); uPxjW"M+
} g5u4|+70
} m6]6!_
pn){v
private int size=0; mEkYT
K{V.N</
private int[] queue; !^v~hD$_q
z|Yt|W
public int get() { Df:/r%
return queue[1]; i1A<0W|
} v-^tj}jA
|.&GmP
public void remove() { rKd|s7l
SortUtil.swap(queue,1,size--); zjSl;ru
fixDown(1); 7zJ2n/`m*
} IN;9p w
file://fixdown `&xdSH
private void fixDown(int k) { Uj3HAu
int j; !c-MC|
while ((j = k << 1) <= size) { j]]5&u/l
if (j < size %26amp;%26amp; queue[j] j++; %+;l|Z{Uf
if (queue[k]>queue[j]) file://不用交换 `D$^SHfyz
break; kBk2mMZ
SortUtil.swap(queue,j,k); &0"*.:J9
k = j; "a33m:]J
} ?4Fev_5m
} &-JIXVd*R
private void fixUp(int k) { G"kX#k0S
while (k > 1) { 1uR@ZK
int j = k >> 1; 6d2eWS
if (queue[j]>queue[k]) _`0DO4IU
break; +>Gw)|oX
SortUtil.swap(queue,j,k); SW+;%+`
k = j; 8Q{9AoQ3'
} DIWyv-
} \u(Gj]B#"
:(tKc3z
} ~ b66 ;
(njTS+?
} 4;gw&sFF
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SortUtil： F MYcZ+4
rd$T6!I
package org.rut.util.algorithm; GC3d7
Fm6]mz%~u#
import org.rut.util.algorithm.support.BubbleSort; GK6CnSV8d
import org.rut.util.algorithm.support.HeapSort; UX.rzYM&T
import org.rut.util.algorithm.support.ImprovedMergeSort; KxeqQ@
import org.rut.util.algorithm.support.ImprovedQuickSort; $ndBT+i
import org.rut.util.algorithm.support.InsertSort; ]Y76~!N
import org.rut.util.algorithm.support.MergeSort; z7)$m0',?
import org.rut.util.algorithm.support.QuickSort; gm8JxhL
import org.rut.util.algorithm.support.SelectionSort; (nuTfmt>
import org.rut.util.algorithm.support.ShellSort; SMRCG"3qwA
@T>^ >
/** @,6*yyO
* @author treeroot "{H{-`Ni
* @since 2006-2-2 4gdXO
* @version 1.0 W[]|Uu/%
*/ [fb9;,x`
public class SortUtil { O#C0~U]dDW
public final static int INSERT = 1; m39.j:BG5
public final static int BUBBLE = 2; 2Dvq3VbiO"
public final static int SELECTION = 3; O&~ @ior
public final static int SHELL = 4; nmE H/a
public final static int QUICK = 5; QQS"K g
public final static int IMPROVED_QUICK = 6; yv>uzb`N
public final static int MERGE = 7; i.?rom
public final static int IMPROVED_MERGE = 8; _4#7 ?p
public final static int HEAP = 9; d7zZ~n
uk,9N
public static void sort(int[] data) { C#1'kQO
sort(data, IMPROVED_QUICK); F{.g05^y
} 6cbV[!BL
private static String[] name={ xy$aFPH!-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;pfN
}; tI#65ox#
+>[zn
private static Sort[] impl=new Sort[]{ o54=^@>O<j
new InsertSort(), xcQ^y}JN
new BubbleSort(), D(dV{^} 9
new SelectionSort(), oY,{9H37b
new ShellSort(), >qO l1]uF
new QuickSort(), f><V;D#
new ImprovedQuickSort(), v@s"*E/PF7
new MergeSort(), Z.unCf3Q
new ImprovedMergeSort(), Jcs /i
new HeapSort() .Zs.O/
}; %]tW2s"
k*F9&-rtN
public static String toString(int algorithm){ iS"6)#a72
return name[algorithm-1]; I|c?*~7*
} 0QrRG$<4X
mRGr+m
public static void sort(int[] data, int algorithm) { SNSoV3|k-
impl[algorithm-1].sort(data); *p0n^XZ% ?
} <veypLi"R
HTMo.hr
public static interface Sort { \Ov~ t
public void sort(int[] data); c5O8,sT
} kXUJlLod
F*Yx1vj
public static void swap(int[] data, int i, int j) { s+G(N$0U
int temp = data; dpt P(H
data = data[j]; j/E(*Hv
data[j] = temp; J\'f5)k
} bS55/M w
} ^U,C])n