[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; LG<lZ9+y
} _L$)~},cT
int i1=l; =r-Wy.a@
int i2=mid+1; Cg{$$&_(Hj
for(int cur=l;cur<=r;cur++){ qsk71L
if(i1==mid+1) ^w&TTo(
data[cur]=temp[i2++]; lZ)u4_
else if(i2>r) }7.q[ ^oF
data[cur]=temp[i1++]; EL}v>sC
else if(temp[i1] data[cur]=temp[i1++]; Tl%4L% bE
else oC7#6W:@w
data[cur]=temp[i2++]; s}z,{Y$-t
} t9`NCng 5
} dhVwS$O )
<}mT[;:"
} 1MahFeQ[
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改进后的归并排序: ZcWl{e4
<M&]*|q>g%
package org.rut.util.algorithm.support; n/|/Womr
|@ldXuYb
import org.rut.util.algorithm.SortUtil; w5*18L=O\
hYWWvJ)S
/** T=R94
* @author treeroot I^ >zr.zA
* @since 2006-2-2 -+PPz?0
* @version 1.0 H~G=0_S
*/ 2(c#m*Q!b
public class ImprovedMergeSort implements SortUtil.Sort { i@I%$!cB
ix#
private static final int THRESHOLD = 10; ,3n}*"K
ffB]4
/* unX^MPpw
* (non-Javadoc) }jk^M|Z"Oz
* >{??/fBd-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {(q Un
*/ Bhs`Y/Ls-
public void sort(int[] data) { Wey\GQ`"8
int[] temp=new int[data.length]; 'PYl%2
mergeSort(data,temp,0,data.length-1); HkV/+ {;S~
} ~%}g"|o
5Y&@ :Y
private void mergeSort(int[] data, int[] temp, int l, int r) { (qG$u&
int i, j, k; 4[-9$ r
int mid = (l + r) / 2; )Z_i[1V
if (l == r) =|#-Rm^YB
return; PA=BNKlH
if ((mid - l) >= THRESHOLD) *7vPU:Q[
mergeSort(data, temp, l, mid); 6,h<0j{
else jF5JpyOc
insertSort(data, l, mid - l + 1); &%bX&;ECzf
if ((r - mid) > THRESHOLD) 'q-h kN
mergeSort(data, temp, mid + 1, r); .F6#s
else g Q9ff,
insertSort(data, mid + 1, r - mid); 6\Z^L1973
[T^6Kzz
for (i = l; i <= mid; i++) { a,E;R$[!
temp = data; jCl[!L5/1
} LgnGqIlx
for (j = 1; j <= r - mid; j++) { TSk6Q'L\v
temp[r - j + 1] = data[j + mid]; l )4OV>
} \mDm*UuG
int a = temp[l]; PaZYs~EO
int b = temp[r]; SeTU`WLEm
for (i = l, j = r, k = l; k <= r; k++) { y5ExEXa
if (a < b) { <?g{Rn
data[k] = temp[i++]; Rq9gtx8,=
a = temp; Y5opZG
} else { 3TtW2h>M
data[k] = temp[j--]; h P1|l
b = temp[j]; #.='dSj
} p~b$+8#+
} +vnaEy
} KqUFf@W
2uHp%fv;
/** fI|1@e1
* @param data ?c+;
* @param l p[eRK .$!
* @param i [n"<(~
*/ <>Im$N ai
private void insertSort(int[] data, int start, int len) { 9x1Dyz 2?F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PA/6l"-`3
} b1OB'P8
} DNy)\+[
} # 9t/j`{
} @e7+d@O<
3IkG*enI
堆排序： !:8!\gE^P
8dH|s#.4um
package org.rut.util.algorithm.support; N#:"X;
gc=e)j@
import org.rut.util.algorithm.SortUtil; \2`U$3Q
u&Fm}/x
/** 6uyf
* @author treeroot dB5DJ:$W$
* @since 2006-2-2 uprQy<I@
* @version 1.0 ^PI49iB
*/ 9s)oC$\
public class HeapSort implements SortUtil.Sort{ `jHGNi
fjFy$NX&>
/* (non-Javadoc) =jN]ckn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'zb7:[[7%
*/ a?kQ2<@g
public void sort(int[] data) { #o RUH8
MaxHeap h=new MaxHeap(); ?1uAY.~ZZB
h.init(data); O2e"TH3
for(int i=0;i h.remove(); y)}aySQK^
System.arraycopy(h.queue,1,data,0,data.length); :]s] =q&]
} M@\'Y$)Y{
]@>|y2
private static class MaxHeap{ OOCeZ3yF(
kWd'gftQ
void init(int[] data){ t/Fe"T[,V
this.queue=new int[data.length+1]; UU;:x"4
for(int i=0;i queue[++size]=data; F*4+7$E0B
fixUp(size); E'G>'cW;x
} =-qsz^^a-
} v`&Z.9!Tz^
x_K%
private int size=0; ~#CCRUhM
J (h>
private int[] queue; 1GdD
l_c?q"X
public int get() { lu_Gr=#O
return queue[1]; CkU=0mcY
} : [y(<TLw
m"R(_E5
public void remove() { g8Z14'Ke
SortUtil.swap(queue,1,size--); 0pFHE>
fixDown(1); +mQSlEo
} pQNFH)=nw
file://fixdown o__q)"^~-
private void fixDown(int k) { L ~w=O!
int j; 3o>t~Sfi
while ((j = k << 1) <= size) { ^|C|=q~:
if (j < size %26amp;%26amp; queue[j] j++; F0Hbklr
if (queue[k]>queue[j]) file://不用交换 &[kgrRF@HU
break; ,k!a3"4+TJ
SortUtil.swap(queue,j,k); fR%8?6
k = j; u$#7W>R
} 1RA$hW@}
} )^TQedF
private void fixUp(int k) { +QX>:z
while (k > 1) { y~7lug
int j = k >> 1; TpgBS4q
if (queue[j]>queue[k]) &pm{7nH
break; l'QR2r7&.
SortUtil.swap(queue,j,k); TeJ `sJ
k = j; iC]lO
} w>uZ$/
} OX4D'
)*ckJK
} =]e^8;e9
Q\L5ZJ%y/
} Br5Io=/wg
!Yu-a!
SortUtil： $4 Uy3C+6
!\1W*6U8;
package org.rut.util.algorithm; Oq6n.:8g"
.h,xBT`}Ji
import org.rut.util.algorithm.support.BubbleSort; KU,w9<~i(
import org.rut.util.algorithm.support.HeapSort; rzDJH:W{2
import org.rut.util.algorithm.support.ImprovedMergeSort; 4&e@>
import org.rut.util.algorithm.support.ImprovedQuickSort; |@.<}/
import org.rut.util.algorithm.support.InsertSort; BA,6f?ktXS
import org.rut.util.algorithm.support.MergeSort; s.'\&B[
import org.rut.util.algorithm.support.QuickSort; p;$9W+H0
import org.rut.util.algorithm.support.SelectionSort; G:`Jrh
import org.rut.util.algorithm.support.ShellSort; D}sGBsOW
8F`
/** )1Nnn
* @author treeroot RFY!o<
* @since 2006-2-2 -G#k/Rz6
* @version 1.0 sG2 3[t8
*/ 5Q`n6x|
public class SortUtil { (JW?azU
public final static int INSERT = 1; -P>=WZu
public final static int BUBBLE = 2; :-La $I>
public final static int SELECTION = 3; 493i*j5r)l
public final static int SHELL = 4; ~aAJn IO
public final static int QUICK = 5; Y,btL'[W
public final static int IMPROVED_QUICK = 6; !"%sp6Wc
public final static int MERGE = 7; mthl?,I|
public final static int IMPROVED_MERGE = 8; o'/C$E4W
public final static int HEAP = 9; ;bZ*6-\!-
1Uk~m
public static void sort(int[] data) { JyC&L6[]Z
sort(data, IMPROVED_QUICK); )C]&ui~1
} *Ne&SXg
private static String[] name={ c8tC3CrKp=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h;qy5KS
}; ^alZ\!B8
R2THL
private static Sort[] impl=new Sort[]{ f\|?_k]
new InsertSort(), {@__%=`CCS
new BubbleSort(), K#hYbDm
new SelectionSort(), qO{ ZZ*
new ShellSort(), Lo5@zNt%W
new QuickSort(), y[6&46r7D
new ImprovedQuickSort(), jUvA<r
new MergeSort(), L~y tAZ,
new ImprovedMergeSort(), Qk.Q9@3W
new HeapSort() puN=OX}C
}; M5WtGIV
/1~|jmi(
public static String toString(int algorithm){ 8`2<g0V2
return name[algorithm-1]; ,G|aLBn
} 5;8B!%b
\K~fRUo]=c
public static void sort(int[] data, int algorithm) { 1]Q2qs
impl[algorithm-1].sort(data); #0hNk%X=
} ,GkW. vEU
W^.-C
public static interface Sort { s%[GQQ-N
public void sort(int[] data); UXPegK!
} Wk#h,p3
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public static void swap(int[] data, int i, int j) { t-*|Hfp*^
int temp = data; s^YTI\L \
data = data[j]; q%k(M[
data[j] = temp; dIpW!Pj^
} 8+ F}`lLA
} 6$s0-{^