[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; y^?7de}
} kU0e;r1N
int i1=l; nKT\/}d
int i2=mid+1; QYPsqkF*
for(int cur=l;cur<=r;cur++){ Ap=LlZ
if(i1==mid+1) uD_iyK0,
data[cur]=temp[i2++]; UO>ADRs}
else if(i2>r) m!V ?xGKJ
data[cur]=temp[i1++]; `$7.(.#s
else if(temp[i1] data[cur]=temp[i1++]; uPhFBD7
else :>]=YE
data[cur]=temp[i2++]; -r7*C:E
} K}LmU{/t/
} P-.>vi^+
7']n_-fu
} 8i;EpAwB
j@ lHgis
改进后的归并排序: f.4r'^
2Gd.B/L6
package org.rut.util.algorithm.support; L TzD\C'
[2:Q.Zj
import org.rut.util.algorithm.SortUtil; )l~:Puvh
"8>T
/** kZfa8wL]P
* @author treeroot E0[ec6^qwY
* @since 2006-2-2 q,(U8
* @version 1.0 mr&nB
*/ [> Q+=(l
public class ImprovedMergeSort implements SortUtil.Sort { gs7h`5[es
cxn3e,d`
private static final int THRESHOLD = 10; Q/xT>cUd
{26/SY
/* j#hFx+S
* (non-Javadoc) E<y0;l?H<
* u_shC"X:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B&3oo
*/ G(" S6u
public void sort(int[] data) { xEb+sE6Z
int[] temp=new int[data.length]; @i U@JE`C
mergeSort(data,temp,0,data.length-1); %ukFn &-2@
} n]S DpptM
-PPH]?],
private void mergeSort(int[] data, int[] temp, int l, int r) { t"4RGO)jh
int i, j, k; yhxen
int mid = (l + r) / 2; V(u#8M
if (l == r) a\;Vly;
return; Q]?r&%Y
if ((mid - l) >= THRESHOLD) ;6P#V`u
mergeSort(data, temp, l, mid); =:Ahg 9
else QQ;<L"VW
insertSort(data, l, mid - l + 1); E{'{fo!#)
if ((r - mid) > THRESHOLD) '#pY/,hVB
mergeSort(data, temp, mid + 1, r); Myaj81
else Ws$<B b
insertSort(data, mid + 1, r - mid); 7L)edR[
Oh)s"f\N
for (i = l; i <= mid; i++) { (xxNQ] l-(
temp = data; R9bsl.e
} dnRbt{`jP
for (j = 1; j <= r - mid; j++) { J)tk<&X
temp[r - j + 1] = data[j + mid]; O<}3\O )G(
} ZFYv|2l
int a = temp[l]; .LMOmc=(
int b = temp[r]; B /q/6Pp
for (i = l, j = r, k = l; k <= r; k++) { t+y$i@R:
if (a < b) { HGIPz{/5U
data[k] = temp[i++]; {S[+hUl
a = temp; -hL0}Wy$N
} else { [&y="6No
data[k] = temp[j--]; 742sqHx
b = temp[j]; a_}k^zw(
} =)QtE|p,77
} nwSujD
} $$'a
nz_=]PHO&
/** 3>vSKh1z
* @param data {P/ sxh:e
* @param l V;}kgWc1
* @param i V}=%/OY?
*/ T .#cd1b
private void insertSort(int[] data, int start, int len) { k_d)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^jY/w>UdH
} FVY$A=G
} w(/#isC
} CVxqNR*DN
} -QPM$
DpA"5RV
堆排序： }7Lo}}
d6RO2^
package org.rut.util.algorithm.support; n`v;S>aT
-o: ifF|
import org.rut.util.algorithm.SortUtil; -!_\4
m 0jm$>:Z
/** ,^Ug[pGG-
* @author treeroot Q#gzk%jL@
* @since 2006-2-2 '2LK(uaU
* @version 1.0 0 $Ygt0d
*/ "p Rr>Fa
public class HeapSort implements SortUtil.Sort{ `3wzOMgJ
x&^>|'H
/* (non-Javadoc) *,x-}%X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d;:H#F+ (
*/ 7tZvz `\
public void sort(int[] data) { 1VXyn\
MaxHeap h=new MaxHeap(); :2v^pg|
h.init(data); 8)KA {gN}
for(int i=0;i h.remove(); mHj3ItXUu
System.arraycopy(h.queue,1,data,0,data.length); 6(M^`&fl
} ;7/ ;4Z
Wnf3[fV6P
private static class MaxHeap{ gC/~@Z8W]
S2APqRg*
void init(int[] data){ TK! D=M
this.queue=new int[data.length+1]; uGo tXb
for(int i=0;i queue[++size]=data; C4,;l^?=%
fixUp(size); 44r@8HO1
} &<Iyb}tA?
} `qXCY^BH2
E\$7tXQK6
private int size=0; ox|K2A
:NCY6? [Dz
private int[] queue; s8O.yL
(Ci{fY6`
public int get() { !<EQVqj6
return queue[1]; pwIu;:O!?
} LvM;ZfAEv
0aWy!d
public void remove() { 3)ZdT{MY
SortUtil.swap(queue,1,size--); = n>aJ(=Pd
fixDown(1); N'5AU (
} @gc|Z]CV
file://fixdown Gd%X> ~
private void fixDown(int k) { B)L=)N
int j; &gv{LJd5b
while ((j = k << 1) <= size) { %)t9b@c!}
if (j < size %26amp;%26amp; queue[j] j++; Q:v9C ^7
if (queue[k]>queue[j]) file://不用交换 NT1"?Thx|
break; isF jJPe
SortUtil.swap(queue,j,k); g %ZKn
k = j; bjq+x:>
} \h{M\bSIEa
} @nNhW
private void fixUp(int k) { M9PzA'}4W6
while (k > 1) { f+c<|"we
int j = k >> 1; M~!DQ1u
if (queue[j]>queue[k]) S7(Vc H
break; {J[5 {]Je[
SortUtil.swap(queue,j,k); 0b3z(x!O
k = j; 7,v}Ap]Pa
} e5z U`R
} ;)c 4
I k[{,p
} RJ63"F $
d*cAm$
} .[Hv/?L
<+r<3ZBA
SortUtil： g~/@`Z2Y
$D%[}[2
package org.rut.util.algorithm; ,suC`)R
#P,C9OQD
import org.rut.util.algorithm.support.BubbleSort; rn8#nQ>QZ%
import org.rut.util.algorithm.support.HeapSort; sI,S(VWor
import org.rut.util.algorithm.support.ImprovedMergeSort; ;,&$ob*/
import org.rut.util.algorithm.support.ImprovedQuickSort; cD5^mxd%
import org.rut.util.algorithm.support.InsertSort; |to|kU
import org.rut.util.algorithm.support.MergeSort; I_aSC4
import org.rut.util.algorithm.support.QuickSort; j34L*?
import org.rut.util.algorithm.support.SelectionSort; \v,mr|
import org.rut.util.algorithm.support.ShellSort; %=PGvu
"TQ3{=j{
/** T+knd'2V6
* @author treeroot [BLBxSL
* @since 2006-2-2 ]+)cXJ}6#
* @version 1.0 4UV6'X)V
*/ S!JwF&EW
public class SortUtil { uK!G-1
public final static int INSERT = 1; y5!fbmf
public final static int BUBBLE = 2; xlHC?d0}
public final static int SELECTION = 3; O9/7?"l"
public final static int SHELL = 4; ]ysEj3
public final static int QUICK = 5; jWE?$r"
public final static int IMPROVED_QUICK = 6; oBpoZ @[Z
public final static int MERGE = 7; I `I+7~t
public final static int IMPROVED_MERGE = 8; $TK<~3`
public final static int HEAP = 9; Jmcf9g
"I n[= 2w
public static void sort(int[] data) { ;5.S"
sort(data, IMPROVED_QUICK); M~SbIk<#a<
} z{uRqAG
private static String[] name={ @TqqF:c7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]hC6PKJU
}; 1 Vq)& N
pf%B
private static Sort[] impl=new Sort[]{ *y@Xm~ld
new InsertSort(), R>CIEL
new BubbleSort(), 84|oqwZO
new SelectionSort(), 3mCf>qj73
new ShellSort(), C\RJ){dk
new QuickSort(), '0MH-M
new ImprovedQuickSort(), WKDa]({k%
new MergeSort(), i p"LoCE
new ImprovedMergeSort(), yr"BeTrS.
new HeapSort() Q[Xh{B
}; _ !r]**
GyP.;$NHa[
public static String toString(int algorithm){ 7#G8qh<
return name[algorithm-1]; 8 mFy9{M
} <,\Op=$l3I
NW AT"
public static void sort(int[] data, int algorithm) { L^b /+R#
impl[algorithm-1].sort(data); 6!Z>^'6
} p@Va`:RDW
#J_+ SL[
public static interface Sort { L2$`S'UW
public void sort(int[] data); BnwYyh
} or)v:4PXW
^v+3qm@,
public static void swap(int[] data, int i, int j) { s/cclFji]
int temp = data; =IC cN|
data = data[j]; R/BW$4/E
data[j] = temp; 83[gV@LW0m
} :@=;WB*0
} ijuIf9!