[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; <Ebkb3_
} hQBeM7$F_
int i1=l; 0$,Ag;"^?
int i2=mid+1; Be2@9
for(int cur=l;cur<=r;cur++){ Ms(;B*
if(i1==mid+1) kq:,}fc;B
data[cur]=temp[i2++]; 8Es]WR5 ^
else if(i2>r) b]s=Uv#)
data[cur]=temp[i1++]; mW 5L;>
else if(temp[i1] data[cur]=temp[i1++]; 0+8ThZ?n
else %_1~z[Dv
data[cur]=temp[i2++]; 76)(G/
} j:|60hDz^
} d\, 4Wet;#
UL[4sv6\9
} ~`hI|i<]
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改进后的归并排序: =rgWOn8
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package org.rut.util.algorithm.support; )+ Wr- Yay
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import org.rut.util.algorithm.SortUtil; nl5K1!1
j&fr4t3
/** |1 is!leP
* @author treeroot ue/6DwUv
* @since 2006-2-2 ;FZ\PxN
* @version 1.0 ;0xCrE{l"
*/ m[oe$yH
public class ImprovedMergeSort implements SortUtil.Sort { _89 _*t(
$7)O&T*q'
private static final int THRESHOLD = 10; `+B+RQl}[
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/* qB]z"Hfq,
* (non-Javadoc) p`1d'n[
* |gxU;"2`5~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xk]5*C]6<
*/ W\U zw,vI
public void sort(int[] data) { Oe$cM=Yf
int[] temp=new int[data.length]; }#<Sq57n
mergeSort(data,temp,0,data.length-1); ;y6Jo
} 5vbnO]8
K;6K!6J:[
private void mergeSort(int[] data, int[] temp, int l, int r) { tb/u@}")
int i, j, k; FPMhHHM
int mid = (l + r) / 2; 4,s: G.g
if (l == r) qvYYKu
return; ~c?yHpZx%
if ((mid - l) >= THRESHOLD) 4PD"[a="
mergeSort(data, temp, l, mid); UXQ{J5Ox+
else l,*Q?q
insertSort(data, l, mid - l + 1); >Fx$Rty
if ((r - mid) > THRESHOLD) 8<!qT1
mergeSort(data, temp, mid + 1, r); bq[Q
else /gy;~eB01
insertSort(data, mid + 1, r - mid); (:+IS W
h,140pW
for (i = l; i <= mid; i++) { 1V+1i)+
temp = data; &%qD Som3
} y13=y}dyDH
for (j = 1; j <= r - mid; j++) { {k?Y:
temp[r - j + 1] = data[j + mid]; FN,0&D}`
} 0A?w,A`"
int a = temp[l]; s7xRry
int b = temp[r]; ~g|e?$j
for (i = l, j = r, k = l; k <= r; k++) { ;S?1E:\av
if (a < b) { K/\#FJno
data[k] = temp[i++]; ;xB"D0~,1
a = temp; :R_{tQ-WG
} else { K:y q^T7
data[k] = temp[j--]; j&T/.]dX&
b = temp[j]; N8D'<BUC
} QwT]| 6>
} qZ\zsOnp
} "mPa>`?
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/** oSa FmP
* @param data t_]UseP$RF
* @param l CdaB.xk
* @param i (sqS(xIY
*/ ljt1:@SN(
private void insertSort(int[] data, int start, int len) { d}l^yln
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cC}s5`
} @bqCs^U35
} ?sS'T7r v
} -S,dG|
} ]LSa(7>EU
hq,;H40%/
堆排序： [tD*\\IA
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package org.rut.util.algorithm.support; Uw&+zJ
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import org.rut.util.algorithm.SortUtil; !zJ.rYZ=g`
~-:CN(U
/** &PgdCijGq;
* @author treeroot v$tS2N2
* @since 2006-2-2 cF(9[8c{
* @version 1.0 :X4\4B*~
*/ M9&tys[KX
public class HeapSort implements SortUtil.Sort{ ~ml\|
FwW%@Y
/* (non-Javadoc) \pzvoj7{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vq5I 2
*/ <M&]*|q>g%
public void sort(int[] data) { n/|/Womr
MaxHeap h=new MaxHeap(); epG;=\f}m`
h.init(data); w5*18L=O\
for(int i=0;i h.remove(); ^U`q1Pg5
System.arraycopy(h.queue,1,data,0,data.length); <=7)t.
} ~IqT>
njq-iU
private static class MaxHeap{ X4k/7EA
2(c#m*Q!b
void init(int[] data){ i@I%$!cB
this.queue=new int[data.length+1]; ix#
for(int i=0;i queue[++size]=data; D$mrnm4d
fixUp(size); l:|Fs=\
} xK y<o
} A&M/W'$s
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private int size=0; (w^&NU'e
`q@~78`
private int[] queue; EV(/@kN2
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public int get() { _x'StD
return queue[1]; +nZG!nP
} #-f^;=7
(gmB$pwS
public void remove() { i,<-+L$z
SortUtil.swap(queue,1,size--); j?mJ1J5
fixDown(1); _0f[.vN
} <n:?WP~U
file://fixdown \c\=S
private void fixDown(int k) { ueg X
int j; /vV 0$vg
while ((j = k << 1) <= size) { .Lp-'!i
if (j < size %26amp;%26amp; queue[j] j++; e=R} 4`
if (queue[k]>queue[j]) file://不用交换 dog,vUu
break; 7,4x7!
SortUtil.swap(queue,j,k); Rd$<R
k = j; <'B^z0I,
} Bf}_ Jw-=
} A+l"
private void fixUp(int k) { [<`+9R
while (k > 1) { Aa Ma9hvT!
int j = k >> 1; 0x &^{P~
if (queue[j]>queue[k]) "D/ fB%h`
break; 8`~]9ej
SortUtil.swap(queue,j,k); evR=Z\ _
k = j; W6iIL:sp
} GkC88l9z
} S-H3UND"
W!(Q_B
} Xm-63U`w5
zKutx6=aj
} 51,m^veO
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SortUtil： =e+go ]87x
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package org.rut.util.algorithm; EAkP[au.
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import org.rut.util.algorithm.support.BubbleSort; Q4PXC$u
import org.rut.util.algorithm.support.HeapSort; KJ~pY<a?
import org.rut.util.algorithm.support.ImprovedMergeSort; {HU48v"W
import org.rut.util.algorithm.support.ImprovedQuickSort; Cnr48ukq
import org.rut.util.algorithm.support.InsertSort; TGLXvP& \
import org.rut.util.algorithm.support.MergeSort; re!CF8 q
import org.rut.util.algorithm.support.QuickSort; QHh#O+by#
import org.rut.util.algorithm.support.SelectionSort; AK!G#ug
import org.rut.util.algorithm.support.ShellSort; S=2,jPX2r
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/** )?WoLEjq
* @author treeroot U_~~PCi
* @since 2006-2-2 f,#xicSB*
* @version 1.0 E*l"uV
*/ ;:4puv+]
public class SortUtil { )'g vaT
public final static int INSERT = 1; >xjy P!bca
public final static int BUBBLE = 2; 0>`69&;g|
public final static int SELECTION = 3; smU+:~
public final static int SHELL = 4; z)B=<4r
public final static int QUICK = 5; >gE_?%a[
public final static int IMPROVED_QUICK = 6; Uww^Sq
public final static int MERGE = 7; _6' g]4
public final static int IMPROVED_MERGE = 8; b+hY^$//
public final static int HEAP = 9; .<B1i
hTm}j,H
public static void sort(int[] data) { I}WJ0}R
sort(data, IMPROVED_QUICK); ;'p'8lts
} h]#)41y<
private static String[] name={ * y B-N;I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k.ZfjX"
}; -{h[W bf
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private static Sort[] impl=new Sort[]{ )3AT=b
new InsertSort(), Fk(5y)
new BubbleSort(), Kf4z*5Veqr
new SelectionSort(), !iw 'tHhR
new ShellSort(), ^~Sn{esA
new QuickSort(), f+V':qz
new ImprovedQuickSort(), dq(x@&J
new MergeSort(), H.L@]~AyL
new ImprovedMergeSort(), `{Jb{L@f
new HeapSort() 0FOf *Lz
}; ?MH4<7?"
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public static String toString(int algorithm){ 1%,Z&@^j
return name[algorithm-1]; l_c?q"X
} I,eyL$x
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public static void sort(int[] data, int algorithm) { q1y4B`
impl[algorithm-1].sort(data); "ivqh{ ,
} l+6(|"md
0pFHE>
public static interface Sort { +mQSlEo
public void sort(int[] data); pQNFH)=nw
} o__q)"^~-
L ~w=O!
public static void swap(int[] data, int i, int j) { 8;8}Oq
int temp = data; d3GK.8y_z
data = data[j]; meR2"JN'
data[j] = temp; ~|rkt`8p
} 5WT\0]RUa
} ' T]oV~H