[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; ,&q Q[i
} 'QP~uK
int i1=l; #cAX9LV
int i2=mid+1; L'@@ewA
for(int cur=l;cur<=r;cur++){ J;|i6q q
if(i1==mid+1) sN8)p%'Lg
data[cur]=temp[i2++]; ng-rvr
else if(i2>r) U9/>}Ni%3G
data[cur]=temp[i1++]; 4#fgUlV
else if(temp[i1] data[cur]=temp[i1++]; ~stG2^"[
else u&Lp
data[cur]=temp[i2++]; FRR`<do5$,
} m35$4
} u]uUm1Er
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} 's>./Pf
q qFN4AO
改进后的归并排序: C}D\^(nLu.
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package org.rut.util.algorithm.support; iuGly~
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import org.rut.util.algorithm.SortUtil; 7A6:*
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/** _enS_R
* @author treeroot f$I$A(0P
* @since 2006-2-2 8oxYgj&~X
* @version 1.0 0\DlzIO
*/ '6zk>rN
public class ImprovedMergeSort implements SortUtil.Sort { L8.u7(-#
C?-_8OA
private static final int THRESHOLD = 10; ;>jLRx<KC
FS^ie|8{D-
/* [qHtN.
* (non-Javadoc) {u@w^ hZ$
* *T:gx:Sg/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .'Rz tBv
*/ sNbCOTow
public void sort(int[] data) { "}ZUa~7
int[] temp=new int[data.length]; .J fV4!=o
mergeSort(data,temp,0,data.length-1); =Dc9|WuHN
} $QC^hC
}:9UI
private void mergeSort(int[] data, int[] temp, int l, int r) { VcpN PU6
int i, j, k; 2y` :#e`x1
int mid = (l + r) / 2; &?(472<f**
if (l == r) *R8qnvE\()
return; ,Jqk0cW2
if ((mid - l) >= THRESHOLD) .~jn N
mergeSort(data, temp, l, mid); +~l`rJ
else iD`>Bt7gD
insertSort(data, l, mid - l + 1); YH-+s
if ((r - mid) > THRESHOLD) v3Xt<I=4y
mergeSort(data, temp, mid + 1, r); NoD\t(@h
else `bMwt?[*
insertSort(data, mid + 1, r - mid); eW.[M?,
(8d"G9R(
for (i = l; i <= mid; i++) { p({)ZU3
temp = data; e}bY9
} "Qfw)!#
for (j = 1; j <= r - mid; j++) { +8eW/Bs@2
temp[r - j + 1] = data[j + mid]; <F#/wU^9
} 3oE3bBj
int a = temp[l]; C YKW4
int b = temp[r]; =[x @BzH
for (i = l, j = r, k = l; k <= r; k++) { * u{CnH
if (a < b) { 9!UFLZR
data[k] = temp[i++]; Zg2F%f$Y
a = temp; (14J~MDB
} else { I$vM )+v=
data[k] = temp[j--]; & GM&,
b = temp[j]; v.pj PBU1
} i=DoK{`L
} Ey**j
} eq(Xzh
&]euL:C
/** XF=GmkO
* @param data e Zb8x
* @param l f[$9k}.
* @param i PN@[k:5(
*/ FdVWj 5 $a
private void insertSort(int[] data, int start, int len) { 4RU/y+[o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H;nq4;^yK
} Ls~F4ar$/
} <+2M,fq+
} |e#ea~/b
} +""8aA
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堆排序： U3zwC5}BN
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package org.rut.util.algorithm.support; wtL_c
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import org.rut.util.algorithm.SortUtil; =W Q_5}
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/** h0)Wy>B=,
* @author treeroot V/jEMJNks
* @since 2006-2-2 pdQ6/vh
* @version 1.0 z9#iU>@
*/ ;v?!Pml2k
public class HeapSort implements SortUtil.Sort{ o]vU(j_Ju
ou[_ y
/* (non-Javadoc) fGD#|a;,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h) .([
*/ 5YG?m{hyn_
public void sort(int[] data) { =os%22*
MaxHeap h=new MaxHeap(); fEl,jA
h.init(data); #sq$i
for(int i=0;i h.remove(); ^|(w)Sy
System.arraycopy(h.queue,1,data,0,data.length); 8R6!SB
} K 8gd?88
=N9a!ii|
private static class MaxHeap{ mt+IB4`
coxMsDs
void init(int[] data){ LI&+5`
this.queue=new int[data.length+1]; `.FvuwP
for(int i=0;i queue[++size]=data; TuBl9 p'6
fixUp(size); n~#%>C7
} [kyF|3k~
} ^/3R/;?
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private int size=0; !6pOY*> j
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private int[] queue; Xw=>L#Q
- T,;Fr'
public int get() { .]qj];m
return queue[1]; NY'sZTM&
} _M/ckv1q@
%r0yBK2uOp
public void remove() { .O{2]e$
SortUtil.swap(queue,1,size--); `5[d9z/6
fixDown(1); 1}C|Javkn
} lEBt<
file://fixdown h7NS9CgO
private void fixDown(int k) { JRkC~fv
int j; SSKn7`
while ((j = k << 1) <= size) { ]w/`02w"$
if (j < size %26amp;%26amp; queue[j] j++; *v[WJ"8@
if (queue[k]>queue[j]) file://不用交换 /RuGh8qzP
break; -v4kW0G
SortUtil.swap(queue,j,k); ;/fZh:V2
k = j; dyRKmLb
} ]ZGP
} O+Fu zCWj
private void fixUp(int k) { ca@0?q#
while (k > 1) { ,BCtNt(
int j = k >> 1; bsw0+UY=9
if (queue[j]>queue[k]) oZxC.;xJ
break; NKD<VMcqw
SortUtil.swap(queue,j,k); 1D03Nbh|5
k = j; wRn]
} 05mjV6j7m
} wfQ6J0
vT V'D&x2
} #1i&!et&/
{OP[Rrm
} ~ztsR;iL
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SortUtil： n}MW# :eJe
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package org.rut.util.algorithm; &FF%VUfQJ
n`Pwo&
import org.rut.util.algorithm.support.BubbleSort; yrOWC
import org.rut.util.algorithm.support.HeapSort; -xS{{"-
import org.rut.util.algorithm.support.ImprovedMergeSort; o(GXv3L
import org.rut.util.algorithm.support.ImprovedQuickSort; ;uj&j1
import org.rut.util.algorithm.support.InsertSort; /EF0~iy
import org.rut.util.algorithm.support.MergeSort; {3F;:%$`c
import org.rut.util.algorithm.support.QuickSort; XdX1GH*C
import org.rut.util.algorithm.support.SelectionSort; 9MQ!5Zn
import org.rut.util.algorithm.support.ShellSort; n,hl6[OL7
q}[g/%
/** hh/C{ l
* @author treeroot ^'j? {@
* @since 2006-2-2 h.PVRAwk
* @version 1.0 !sWKi)1
*/ h>AK^fX
public class SortUtil { ru#,pJ=O(
public final static int INSERT = 1; tHAr9
public final static int BUBBLE = 2; 7e[3Pu_/X
public final static int SELECTION = 3; w U".^ +
public final static int SHELL = 4; q1!45a
public final static int QUICK = 5; \ng!qN
public final static int IMPROVED_QUICK = 6; +XV7W=
public final static int MERGE = 7; 86pujXjc'
public final static int IMPROVED_MERGE = 8; NWnUXR
public final static int HEAP = 9; SU>2MT^
$gZC"~BR
public static void sort(int[] data) { .[mI9dc
sort(data, IMPROVED_QUICK); jSi\/(E
} =PU!hZj"L
private static String[] name={ u!4i+7}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &CP]+ at
}; :wWPEhK
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private static Sort[] impl=new Sort[]{ s{g^K#BoFi
new InsertSort(), vwF#;jj\
new BubbleSort(), }6S~"<Ym
new SelectionSort(), ZC7ZlL_
new ShellSort(), % YgGw:wZ
new QuickSort(), 'Cr2& dy
new ImprovedQuickSort(), -/^a2_d[
new MergeSort(), ?7;_3+T#
new ImprovedMergeSort(), Dk^,iY(u
new HeapSort() Q[rmsk2L'
}; MBp,!_Q6
W20qn>{z
public static String toString(int algorithm){ 9Rf})$o+
return name[algorithm-1]; "W71#n+[
} 62s0$vw
5vP=Wf cW
public static void sort(int[] data, int algorithm) { ve3-GWT{C
impl[algorithm-1].sort(data); |$^a"Yd`9
} @#u'z~a)
V1l9T_;f
public static interface Sort { rlRRGJ\l
public void sort(int[] data); K^6fg,&
} A#;TY:D2
n0 q$/Y.
public static void swap(int[] data, int i, int j) { S+*%u/;l
int temp = data; ,$oz1,Q/
data = data[j]; cXDG(.!n7B
data[j] = temp; fkHCfcU
} W)LtnD2 w
} 'uBagd>*