[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; g8+4$2`ny
} Y*kh$E%<#
int i1=l; D0#T-B\#
int i2=mid+1; V|3yZ8lE
for(int cur=l;cur<=r;cur++){ z[5Y Z~}*
if(i1==mid+1) 8tV=fSHd
data[cur]=temp[i2++]; t*Vao
else if(i2>r) Uin k
data[cur]=temp[i1++]; K#l -?
else if(temp[i1] data[cur]=temp[i1++]; C`2*2Y%xkG
else rysP)e
data[cur]=temp[i2++]; *h*j%
} N;C"X4rV
} V4`:Vci Aw
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} ,#E3,bu6_4
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改进后的归并排序: +p9LE4g7Q
p|h.@do4
package org.rut.util.algorithm.support; tDC0-N&6S~
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import org.rut.util.algorithm.SortUtil; P\q<d
@4/~~
/** Tn4W\?R
* @author treeroot }t@f|TX
* @since 2006-2-2 s6uF5]M;2
* @version 1.0 t4f (Y,v
*/ }zkL[qu;
public class ImprovedMergeSort implements SortUtil.Sort { LN@E\wRw{r
hsTFAfa'
private static final int THRESHOLD = 10; l-<3{!
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/* tJUVw=
* (non-Javadoc) Smqr q
* l5FuMk-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DAjG*K{
*/ H!unIy|
public void sort(int[] data) { zyaW3th
int[] temp=new int[data.length]; /hm84La
mergeSort(data,temp,0,data.length-1); =dgo!k
} |. J,8~x
BCBEX&0hk{
private void mergeSort(int[] data, int[] temp, int l, int r) { o2;(VSKhS
int i, j, k; 4=u+ozCG
int mid = (l + r) / 2; B3y?.
if (l == r) <\ y!3;
return; mSU@UD|'
if ((mid - l) >= THRESHOLD) C:]/8l
mergeSort(data, temp, l, mid); $T"h";M)s
else &}vR(y*#c
insertSort(data, l, mid - l + 1); ~'NX~<m
if ((r - mid) > THRESHOLD) ;$vLq&(}
mergeSort(data, temp, mid + 1, r); j(0Ilx|7v
else {/-y>sm
insertSort(data, mid + 1, r - mid); )HEfU31IC
MQwIPjk8
for (i = l; i <= mid; i++) { TG1P=g5h
temp = data; ]kRI}Om2
} :~vxZ*a
for (j = 1; j <= r - mid; j++) { A[RHw<
temp[r - j + 1] = data[j + mid]; 9z #P
} Z+NF(d
int a = temp[l]; [-4KY4R
int b = temp[r]; -7k[Vg?
for (i = l, j = r, k = l; k <= r; k++) { gXLCRn!iR
if (a < b) { 9*4 .
data[k] = temp[i++]; w'A tf
a = temp; y>$1UwQ
} else { doBNghS
data[k] = temp[j--]; J5;5-:N
b = temp[j]; E(_KN[}S
} jk )Vb
} im8 -7Xt
} tmp6hB
b6|Z"{TI _
/** ?{eY\I
* @param data j?xk&
* @param l lK*jhW?3:
* @param i f27)v(EJ
*/ {=3B)+N
private void insertSort(int[] data, int start, int len) { s D_G)c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #:#Dz.$L
} Y.>kO
} lkb2?2\+
} UgC)7 K1
} s O=4IBE
X]!D;7^
堆排序： ^2EhlK^)
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package org.rut.util.algorithm.support; !4t`Hv?'
:k~dj C
import org.rut.util.algorithm.SortUtil; pA.._8(t
r2nBWA3
/** ePEe?o4;
* @author treeroot \,R!S/R#
* @since 2006-2-2 #-{N Ws\
* @version 1.0 i6Qb[\;
*/ BxdX WO
public class HeapSort implements SortUtil.Sort{ h=6xZuA\
:H?f*aw
/* (non-Javadoc) 8}BS2C%P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (rcMA>2=
*/ >aG=T{
public void sort(int[] data) { &s8<6P7
MaxHeap h=new MaxHeap(); g*y/j]
h.init(data); K(VW%hV1
for(int i=0;i h.remove(); &yU>2=/T
System.arraycopy(h.queue,1,data,0,data.length); ^"x<)@X
} \}#@9=
3z3_7XI
private static class MaxHeap{ Ie@Jb{x
9i=B
void init(int[] data){ ]-:6T0JuS
this.queue=new int[data.length+1]; ` 1+%}}!$u
for(int i=0;i queue[++size]=data; ORBxD"J&
fixUp(size); fx)KNm8Lx
} E'EcP4eL
} o=_c2m
=45W\
private int size=0; ag8`O&+
-V5w]F'
private int[] queue; c}-(.eu
:(,mL2[
public int get() { $a(`ve|
return queue[1]; I[D8""U
} }y6q\#G
e |V]
public void remove() { cWa)#:JOV
SortUtil.swap(queue,1,size--); "=A>}q@;H
fixDown(1); EzpFOqJG
} ->gZ)?Fqy
file://fixdown ] fwZAU
private void fixDown(int k) { V.=lGhi
int j; 9Ah[rK*}
while ((j = k << 1) <= size) { uMmXs%9T
if (j < size %26amp;%26amp; queue[j] j++; .=c<>/ 0
if (queue[k]>queue[j]) file://不用交换 80;n|nNB
break; (9C<K<
SortUtil.swap(queue,j,k); ke%pZ7{u
k = j; )9L/sKz
} }6]0hWsN[
} }]6f+
private void fixUp(int k) { p&Ed\aQ%z;
while (k > 1) { m3.sVI0I
int j = k >> 1; 9P WY52!
if (queue[j]>queue[k]) 9 OT,TpA
break; ~*.-
SortUtil.swap(queue,j,k); :iUF7P1I
k = j; KbW9s,:p
} (gXN%rsY
} GTl xq%?b
s?C&s|'.
} j !H^-d}q
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} & ,hr8
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SortUtil： V 9;[M;
z-T{~{q
package org.rut.util.algorithm; #& ?g %'
+.yT/y"
import org.rut.util.algorithm.support.BubbleSort; DN] v_u+}
import org.rut.util.algorithm.support.HeapSort; y1f:?L-z
import org.rut.util.algorithm.support.ImprovedMergeSort; |> enp>
import org.rut.util.algorithm.support.ImprovedQuickSort; </`yd2>
import org.rut.util.algorithm.support.InsertSort; r 2:2,5_
import org.rut.util.algorithm.support.MergeSort; CH#k(sy
import org.rut.util.algorithm.support.QuickSort; Ond'R'3\E
import org.rut.util.algorithm.support.SelectionSort; PoSpkJH
import org.rut.util.algorithm.support.ShellSort; ipE]}0q
EHf\L
/** fS&6
* @author treeroot "sUyHt-&
* @since 2006-2-2 *m+BuGt|
* @version 1.0 K }$&:nao
*/ G&f8n
public class SortUtil { o4y']JSN
public final static int INSERT = 1; w n|]{Ww35
public final static int BUBBLE = 2; 2{|$T2?e
public final static int SELECTION = 3; rf&M!d}!
public final static int SHELL = 4; |I;$M;'r&
public final static int QUICK = 5; "tk-w{>
public final static int IMPROVED_QUICK = 6; ]; $] G-
public final static int MERGE = 7; 5e8AmY8;
public final static int IMPROVED_MERGE = 8; #U mF-c
public final static int HEAP = 9; 0MF}^"R
(qMj-l
public static void sort(int[] data) { $.%rAa_H
sort(data, IMPROVED_QUICK); JYb}Zw;
} ^Q<mV*~
private static String[] name={ (5L-G{4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X;F8_+Np
}; fh8j2S9J
&EGqgNl
private static Sort[] impl=new Sort[]{ ~Heb1tl;
new InsertSort(), k44Q):ncY7
new BubbleSort(), K>:]Bx#F7
new SelectionSort(), HeGYu?&
new ShellSort(), _*M42<wcO
new QuickSort(), |KI UgI
new ImprovedQuickSort(), &C<yfRDu
new MergeSort(), 2-*V=El
new ImprovedMergeSort(), DE$q+j0P
new HeapSort() CG\tQbum
}; =<@2#E)
iRo.RU8>
public static String toString(int algorithm){ E_z;s3AXQ
return name[algorithm-1]; {PU!=IkTS
} B<?[Mrdxw
YV% 5y1i
public static void sort(int[] data, int algorithm) { r;>+)**@vl
impl[algorithm-1].sort(data); AFvgbn8Qh
} O43YY2
:,12")N
public static interface Sort { %VJ85^B3
public void sort(int[] data); DhLqhME53
} $3T_.
-Y#sI3o*R8
public static void swap(int[] data, int i, int j) { Qp,DL@mp>8
int temp = data; %=we`&
data = data[j]; q#A(gyy
data[j] = temp; !rDdd%Z
} 1LJuCI=~
} O%~jop7#6