[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; fW w+'xF!
} HO_!/4hrU
int i1=l; egmNX't6f5
int i2=mid+1; yZV Y3<]
for(int cur=l;cur<=r;cur++){ r"|UgCc
if(i1==mid+1) O))YJh"'_
data[cur]=temp[i2++]; #&}j'oD|N
else if(i2>r) vR7S!
data[cur]=temp[i1++]; HcQ)XJPK
else if(temp[i1] data[cur]=temp[i1++]; QJy1j~9x
else 2,6~;R
data[cur]=temp[i2++]; 0N87G}Xu
} yvWM]A
} 9RPZj>ezjA
;(-Wc9=
} tc0(G~.N
$@HW|Y
改进后的归并排序: eg1Mdg\a
FnPn#Cv>*
package org.rut.util.algorithm.support; U4NH9-U'
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import org.rut.util.algorithm.SortUtil; wEF"'T
z"c,TlVN3
/** 4YSVy2x
* @author treeroot Lz&FywF-l
* @since 2006-2-2 D>-srzw
* @version 1.0 7<ZGNxZ~
*/ l@0${&n
public class ImprovedMergeSort implements SortUtil.Sort { Vq599M:)V
BJgHel+N
private static final int THRESHOLD = 10; &. MUSqo9
\1O wZ@
/* t"Bp# U1
* (non-Javadoc) #p<(2wN
* _fdD4-2U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jmG)p|6
*/ 9tWpxrig%
public void sort(int[] data) { (l-l Y
int[] temp=new int[data.length]; PA*1]i#2M=
mergeSort(data,temp,0,data.length-1); 7_R[=t
} ?3%r:g4
OFxCV`>ce
private void mergeSort(int[] data, int[] temp, int l, int r) { <@$+uZt+
int i, j, k; S.Q:O{]
int mid = (l + r) / 2; Q?bCQZ{-Lh
if (l == r) %ol\ sO|
return; [Z2{S-)UM
if ((mid - l) >= THRESHOLD) Ga_Pt8L6
mergeSort(data, temp, l, mid); 8,IQ6Or|-2
else ]XASim:A
insertSort(data, l, mid - l + 1); qe5;Pq !G
if ((r - mid) > THRESHOLD) _^g4/G#13c
mergeSort(data, temp, mid + 1, r); IF cre
else xn>N/+,
insertSort(data, mid + 1, r - mid); M.\XG}RR
Y!`pF
for (i = l; i <= mid; i++) { jwg*\HO,s
temp = data; 6!HYx
} -,+~W#n
for (j = 1; j <= r - mid; j++) { }5;/!P_A
temp[r - j + 1] = data[j + mid]; Ng2Z7k
} XmP,3KG2{S
int a = temp[l]; h1)ny1;
int b = temp[r]; $:yIe.F
for (i = l, j = r, k = l; k <= r; k++) { vJ{F)0 K
if (a < b) { F1S0C>N?5
data[k] = temp[i++]; 1(pv3
a = temp; rp4{lHw>C/
} else { aCJ-T8?'
data[k] = temp[j--]; 9^8_^F
b = temp[j]; O6,2M[a
} _kc}:
} &7,::$cu
} [Op^l%BC
KF1Zy;
/** }lXor~_i
* @param data DS9-i2
* @param l \<hHZS
* @param i XSCcumde!
*/ @ M4m!;rM
private void insertSort(int[] data, int start, int len) { M~h.MPI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A)gSOC{3F)
} .mNw^>:cq
} Z&4L///
} w5yX~8UzJ
} 0|]d^bo
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堆排序： 8;"9A
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package org.rut.util.algorithm.support; g{ ;OgS3>
,:#h;4!VRF
import org.rut.util.algorithm.SortUtil; a*t @k*d_
;n.h!wmJ}
/** Nobu= Z
* @author treeroot g<ov` bF
* @since 2006-2-2 "[rz*[o8I
* @version 1.0 &grvlK
*/ ;W|GUmADf
public class HeapSort implements SortUtil.Sort{ R! n7g8I%
89j:YfA=v
/* (non-Javadoc) Q3Z?Z;2aR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N]14~r=
*/ N`{6<Z0
public void sort(int[] data) { ZNl1e'
MaxHeap h=new MaxHeap(); Vc6 >i|"-O
h.init(data); +*Fe
for(int i=0;i h.remove(); D>^g2!b:
System.arraycopy(h.queue,1,data,0,data.length); lD->1=z
} H!6+x*P0
(sI`FW_
private static class MaxHeap{ hT,rcIkg:
'? -N
void init(int[] data){ 5wdKu,nq
this.queue=new int[data.length+1]; P_b!^sq9
for(int i=0;i queue[++size]=data; :yE0DS<_
fixUp(size); *2}f $8
} u\MxQIo'u
} '@ p464
ho)JY $#6
private int size=0; }I MV@z B
;y{(#X#
private int[] queue; LitdO>%#2
k ]T
public int get() { Kv:Rvo
return queue[1]; +sTPTCLE
} WgG$ r
)#1!%aQ
public void remove() { I;1)a4Xc4R
SortUtil.swap(queue,1,size--); 2ga8 G4dU
fixDown(1); _>aP5g?Ep
} ~{);Ab.9+
file://fixdown oX*;iS X
private void fixDown(int k) { lWd@
int j; yyk@f%
while ((j = k << 1) <= size) { @v:Eh
if (j < size %26amp;%26amp; queue[j] j++; X&| R\v=}
if (queue[k]>queue[j]) file://不用交换 y<wd~!>Ubu
break; *0?@/2&
SortUtil.swap(queue,j,k); bo@ ?`5
k = j; SjY|aW+wAL
} xG(iSuz
} ycwkF$7
private void fixUp(int k) { \{!,a
while (k > 1) { KK5_;<
int j = k >> 1; y"ss<`Cn
if (queue[j]>queue[k]) 3IjsV5a
break; eE=2~ ylU
SortUtil.swap(queue,j,k); >4-9 @i0FV
k = j; @/ nGc9h
} : 2$*'{mM
} eX lJ=S}
*W^a<Zm8>
} gHkHAOe/
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} nz'6^D7`r
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SortUtil： D%LYQ
,!LY:pMK
package org.rut.util.algorithm; U* c'xoP
Fq!_VF^r
import org.rut.util.algorithm.support.BubbleSort; I.(@#v7T
import org.rut.util.algorithm.support.HeapSort; |W$|og'wC
import org.rut.util.algorithm.support.ImprovedMergeSort; 61_-G#W
import org.rut.util.algorithm.support.ImprovedQuickSort; `u R`O9)e
import org.rut.util.algorithm.support.InsertSort; _ WPt zL
import org.rut.util.algorithm.support.MergeSort; $uJc/
import org.rut.util.algorithm.support.QuickSort; $duT'G, -
import org.rut.util.algorithm.support.SelectionSort; .Pte}pM"v
import org.rut.util.algorithm.support.ShellSort; g oyQ',+
WC37=8mA
/** <%`Rku
* @author treeroot :<k (y?GB
* @since 2006-2-2 nHH FHnFf
* @version 1.0 9$U4x|n
*/ ggitUQ+t;G
public class SortUtil { H~mp*S
public final static int INSERT = 1; Q$ Dx:
public final static int BUBBLE = 2; E/wxX#]\
public final static int SELECTION = 3; hW/Ve'x[
public final static int SHELL = 4; (i1x<
public final static int QUICK = 5; WHOX<YJs
public final static int IMPROVED_QUICK = 6; Iz-mUD0;
public final static int MERGE = 7; Q<g>WNb
public final static int IMPROVED_MERGE = 8; /Hq
public final static int HEAP = 9; '1xhP}'3)
7fO<=ei:
public static void sort(int[] data) { I"x~ 7
sort(data, IMPROVED_QUICK); A>e-eD xi
} q8-hbWNm4
private static String[] name={ _dz ZS(7M6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }p)Hw2
}; >SLmlK
p >ua{}!L
private static Sort[] impl=new Sort[]{ C984Ee
new InsertSort(), W[a"&,okqO
new BubbleSort(), sf[|8}(
new SelectionSort(), 42A'`io[w]
new ShellSort(), Y'bz>@1(
new QuickSort(), MP<]-M'|<
new ImprovedQuickSort(), W[qy4\.B
new MergeSort(), rFkZ'rp74b
new ImprovedMergeSort(), /V`SJ"
new HeapSort() 5M~nNm[xJU
}; vu91" 4Fa
+]( y
public static String toString(int algorithm){ E{e
return name[algorithm-1]; mvc ;.+
} \>}#[?y
zS|4@t\__
public static void sort(int[] data, int algorithm) { Njr;Wa.r+
impl[algorithm-1].sort(data); G!=(^G@J;
} kaiK1/W0;
Skr0WQ
public static interface Sort { Yt,MXm\
public void sort(int[] data); ={ -kQq
} 44B D2`nF
Fw{#4
public static void swap(int[] data, int i, int j) { dT% eq7=
int temp = data; E8"&gblg
data = data[j]; 5#N<~
data[j] = temp; Im!b-1
} @>.aQE
} Uf]$I`T#