[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; 6~^+</?
} o#;w>-
int i1=l; DD;PmIW
int i2=mid+1; lVMAab
for(int cur=l;cur<=r;cur++){ B^eea[
if(i1==mid+1) Q&wBX%@^L
data[cur]=temp[i2++]; JG4Tb{F=
else if(i2>r) |s|RJA1
data[cur]=temp[i1++]; tr):n@
else if(temp[i1] data[cur]=temp[i1++]; tEb2>+R
else b%AYYk)d?
data[cur]=temp[i2++]; Dt8eVWkN~
} _w)0r}{
} xU)~)eK
$U!w#|&
} Yh"R#
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改进后的归并排序: w:pc5N>we0
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package org.rut.util.algorithm.support; x'}{^'}/
8 #0?
import org.rut.util.algorithm.SortUtil; H3MT.Cpd
|U12fuQ
/** yl|+D]
* @author treeroot G>cTqD6gT
* @since 2006-2-2 wtMS<$
* @version 1.0 u{8Wu;
*/ %Sj;:LC
public class ImprovedMergeSort implements SortUtil.Sort { V5R``Tp
,v(G2`Z
private static final int THRESHOLD = 10; C!v0*^i
4ajBMgD]KG
/* 0p![&O
* (non-Javadoc) N/]TZu~k z
* y=-d*E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7M5HIK6_
*/ c~@I1M
public void sort(int[] data) { +STT(bMn
int[] temp=new int[data.length]; 8&H1w9NrX_
mergeSort(data,temp,0,data.length-1); 350y6pVh
} r0?`t!%V
n0nkv[
private void mergeSort(int[] data, int[] temp, int l, int r) { 90M:0SH
int i, j, k; wHdq:,0-!
int mid = (l + r) / 2; bMf+/n
if (l == r) 4{*K%pv\
return; 6$2)m;| XY
if ((mid - l) >= THRESHOLD) /9W-;l{=z
mergeSort(data, temp, l, mid); d7P| x
else 7J##IH+z35
insertSort(data, l, mid - l + 1); luAhyEp
if ((r - mid) > THRESHOLD) K@%.T#
mergeSort(data, temp, mid + 1, r); %5jxq9:K
else C'kd>LAGu
insertSort(data, mid + 1, r - mid); aZ#c_Q#gZ
<"aPoGda
for (i = l; i <= mid; i++) { sg{>-KHM
temp = data; ;\(wJ{u?Y
} -,3Ka:
for (j = 1; j <= r - mid; j++) { no^I![_M
temp[r - j + 1] = data[j + mid]; (~,Q-w"
} '^}l|(
int a = temp[l]; ;w[|IRa
int b = temp[r]; d(42ob.Tr
for (i = l, j = r, k = l; k <= r; k++) { TC"mP!1
if (a < b) { LR'F/.Dx
data[k] = temp[i++]; m`E8gVC
a = temp; ;%hlh)k$
} else { ad }^Dj/
data[k] = temp[j--]; L@9"6&
b = temp[j]; Mt<TEr}7Z=
} W/xb[w9v
} Fp|x,-
} qzsS"=5
KGzBK:
/** cqi: Rj
* @param data ;&?NuK
* @param l ~~b[X\1
* @param i -.i1l/FzP
*/ !SKEL6~7
private void insertSort(int[] data, int start, int len) { ,`)!K}2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #2{ };)
} GS4!c8>
} lRX*\M\`
} x}].lTjD
} NA!;#!
2U)H2%
堆排序： 'C!b($Y
3QZw
package org.rut.util.algorithm.support; >Ix)jSNLgo
ZSU;>&>%v
import org.rut.util.algorithm.SortUtil; d*7 Tjs{\
I( G8cK
/** rG}o!I`z
* @author treeroot hA/K>Z
* @since 2006-2-2 sq\oatMw[
* @version 1.0 j ]F Zy
*/ #p6#,PZ
public class HeapSort implements SortUtil.Sort{ O5LB&s
/t(dhz&xN
/* (non-Javadoc) lpj$\WI=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sn]8h2z
*/ =uIu0_v
public void sort(int[] data) { hd8:|_
MaxHeap h=new MaxHeap(); 2_R'Kl![
h.init(data); t%/Y^N;
for(int i=0;i h.remove(); [x'xbQLGd
System.arraycopy(h.queue,1,data,0,data.length); 9Psy$
} Yhb=^)@))
w f,7
private static class MaxHeap{ 3z!\Z[
ZH~T'Bg
void init(int[] data){ ZBB^?FF
this.queue=new int[data.length+1]; =ugxPgn
for(int i=0;i queue[++size]=data; /~K-0K#w
fixUp(size); 6&`.C/"2
} ~ubGx
} L/_OgL]YdI
GBGGV#_q'}
private int size=0; bN8GRK )
Q+U}
private int[] queue; H"N o{|^<
,9`sC8w|
public int get() { 1aS[e%9Mg
return queue[1]; A_muuOIcI
} {r#2X1
$,bLK|<hi
public void remove() { 6NVf&;laQ
SortUtil.swap(queue,1,size--); [kDjht|$>
fixDown(1); Wt"fn&R}
} H$9--p
file://fixdown Rq%g5lK
private void fixDown(int k) { $o?Wum
int j; |-bSoq7t
while ((j = k << 1) <= size) { XnHcU=~q
if (j < size %26amp;%26amp; queue[j] j++; c6:"5};_
if (queue[k]>queue[j]) file://不用交换 7q<I7Wt
break; (A}##h
SortUtil.swap(queue,j,k); I!%T!B540
k = j; ):
} ZTfs&5
} :<YcV#!P
private void fixUp(int k) { hu%UEB
while (k > 1) { 0Y,_ DU
int j = k >> 1; TPZZln'3
if (queue[j]>queue[k]) 5P9hm[
break; E5w.wx
SortUtil.swap(queue,j,k); ,^3eMn
k = j; /%\E2+6
} N|EH`eu^i
} dq%7A=-
-o#HO_9
} \Lv eZ_h5
JV=d!Gi[C
} ,F`:4=H%
H[#s&Fk2
SortUtil： j(F&*aH78
aL$m
package org.rut.util.algorithm; $`W.9
<i``#"/
import org.rut.util.algorithm.support.BubbleSort; x_CB'Rr6
import org.rut.util.algorithm.support.HeapSort; -yHVydu=
import org.rut.util.algorithm.support.ImprovedMergeSort; uvz}qH@j/Q
import org.rut.util.algorithm.support.ImprovedQuickSort; W2G`K+p
import org.rut.util.algorithm.support.InsertSort; L']EYK5
import org.rut.util.algorithm.support.MergeSort; 7^P!@o$v!
import org.rut.util.algorithm.support.QuickSort; zA=gDuy3@
import org.rut.util.algorithm.support.SelectionSort; }A3(g$8KR
import org.rut.util.algorithm.support.ShellSort; {y0#(8-&
8'Sw?FbVA/
/** )eop:!m
* @author treeroot :j)H;@[I
* @since 2006-2-2 Xm`jD'G
* @version 1.0 O?/\hZ"&c
*/ /bv`_>
public class SortUtil { xwhH_[
public final static int INSERT = 1; Me;@/;c(
public final static int BUBBLE = 2; :uy8$g*;TE
public final static int SELECTION = 3; >H?l[*9
public final static int SHELL = 4; Sh(
public final static int QUICK = 5; mO;X>~K
public final static int IMPROVED_QUICK = 6; &@u;xc| v
public final static int MERGE = 7; h<U<KO
public final static int IMPROVED_MERGE = 8; ,rVm81-2
public final static int HEAP = 9; D[U[D
vU0j!XqE
public static void sort(int[] data) { o_ka'|
sort(data, IMPROVED_QUICK); Ve#VGlI
} +O>!x#)&"
private static String[] name={ L\_MZ*<0[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <ek_n;R
}; QNj hA'[T
mJe;BU"y]
private static Sort[] impl=new Sort[]{ Mk9'
new InsertSort(), k_?xiOSh
new BubbleSort(), hn\<'|n
new SelectionSort(), n=!]!'h\:
new ShellSort(), :=WiT_M
new QuickSort(), l&2A]5C
new ImprovedQuickSort(), <;<_f U
new MergeSort(), }UNRe]ft$
new ImprovedMergeSort(), . #`lW7
new HeapSort() +U_> Bo
}; 5m{!Rrb
aTF~rAne<
public static String toString(int algorithm){ LDqq'}qK6
return name[algorithm-1]; CKwrE]h
} rM<|<6(L
P6V_cw$
public static void sort(int[] data, int algorithm) { rZ5vey
impl[algorithm-1].sort(data); o5?f]Uq5 ,
} }la\?I
k?ubr)[)
public static interface Sort { UUi@ U
public void sort(int[] data); }z:g}".4
} <+@?V$&
dYV'<
public static void swap(int[] data, int i, int j) { '7AlE!7%
int temp = data; b@j**O>[q)
data = data[j]; !dQG 5v
data[j] = temp; =c>2d.^l
} (PAkKY}
} q8%T)$!