[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; Pfvb?Hy
} uv$5MwKU
int i1=l; M^WoV }'
int i2=mid+1; |n,O!29
for(int cur=l;cur<=r;cur++){ u"v$[8
if(i1==mid+1) "[["naa
data[cur]=temp[i2++]; '!Va9m*w7
else if(i2>r) B &Z0ZWx
data[cur]=temp[i1++]; =r]_$r%gR
else if(temp[i1] data[cur]=temp[i1++]; oSMIWwg7G
else F'{T[MA
data[cur]=temp[i2++]; ZT&[:>upR
} Uhh[le2 %
} ;_< Yzl
502(CO>
} ,:}VbQ:3I
md{1Jn"
改进后的归并排序: cqh1,h$sG
=u9e5n
package org.rut.util.algorithm.support; B\AyG4J
r\b$/:y<e
import org.rut.util.algorithm.SortUtil; P!9-!+F"
Ve[Kv07
/** :X9;KoJl-V
* @author treeroot @Kbj:S;m
* @since 2006-2-2 CWp>8@v
* @version 1.0 [C 7X#|
*/ &JLKHwi/
public class ImprovedMergeSort implements SortUtil.Sort { NODE`VFu
ct*~\C6Ze
private static final int THRESHOLD = 10; U.^%7.
Q"pZPpl&
/* '2|mg<Ft
* (non-Javadoc) uh)f/)6
* Us&~d"n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :5^5l
*/ 'g)5vI~'
public void sort(int[] data) { TffeCaBv
int[] temp=new int[data.length]; }/NL"0j+4
mergeSort(data,temp,0,data.length-1); :8)3t! A
} u?g;fh6
+)( "!@
private void mergeSort(int[] data, int[] temp, int l, int r) { 9J49s1
int i, j, k; u`+kH8#
int mid = (l + r) / 2; W}(xE?9&
if (l == r) )u!}`UJ
return; W7V#G(cpU
if ((mid - l) >= THRESHOLD) sDHFZ:W
mergeSort(data, temp, l, mid); `kOp9(Q{
else i}:^<jDv?
insertSort(data, l, mid - l + 1); ,+n{xI2
if ((r - mid) > THRESHOLD) 5iItgVTW
mergeSort(data, temp, mid + 1, r); gavf$be
else V,tYqhQ3
insertSort(data, mid + 1, r - mid); :VRQd}$Pi
Q;2kbVWY
for (i = l; i <= mid; i++) { J0@#xw=+
temp = data; ,tFLx#e#
} GV)DLHiyxX
for (j = 1; j <= r - mid; j++) { Vc|QW
temp[r - j + 1] = data[j + mid]; Mm"0Ip2"
} +{e2TY
int a = temp[l]; b Oh[(O!
int b = temp[r]; ~|wh/]{b9
for (i = l, j = r, k = l; k <= r; k++) { Xdf;'|HO
if (a < b) { %8%0l*n'
data[k] = temp[i++]; _32 o7}!x
a = temp; !| GD8i
} else { JHVesX
data[k] = temp[j--]; olDzmy(=W*
b = temp[j]; 9qJ:h-?M
} Qo["K}Ty
} )!`>Q|]}Zd
} /EM=!@ka
5=_))v<Tp
/** 'khhn6itA
* @param data N*hx;k9
* @param l cC`PmDGq
* @param i s)~H_,
*/ /$ueLa
private void insertSort(int[] data, int start, int len) { D z>7.'3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +JFE\>O
} $xj>j
} euh rEjwkH
} \"=@uqar2
} o:/ymeG
fJG!TQJ[Y
堆排序： Ria*+.k@"B
]:]w+N%7
package org.rut.util.algorithm.support; AUkePp78
,?!4P+ob
import org.rut.util.algorithm.SortUtil; G-T2b,J [
uchz<z1
/** .sPa${
* @author treeroot :+S~N)0j^
* @since 2006-2-2 (>x_fDv
* @version 1.0 -f[95Z3}
*/ M}F) P&Y
public class HeapSort implements SortUtil.Sort{ #>\8m+h 9
I9r> 3?
/* (non-Javadoc) p8u-3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cf1GA
*/ jJY!;f
public void sort(int[] data) { a s?)6
MaxHeap h=new MaxHeap(); D~<0CQ3n.
h.init(data); }%eXGdC
for(int i=0;i h.remove(); ww{07g
System.arraycopy(h.queue,1,data,0,data.length); iX'#~eK*<
} :.EVvuXI
'^6x-aeq[D
private static class MaxHeap{ #v4q:&yKf
lWYgIpw
void init(int[] data){ -jsk-,
this.queue=new int[data.length+1]; m3K .\3
for(int i=0;i queue[++size]=data; 6/thhP3`-
fixUp(size); wS1zd?
} ]^CNC0
} )h?Pz1-W1
?qjlWCV|e
private int size=0; !+I!J s"
q]o^Y
private int[] queue; |b:91l
$5/lU }To
public int get() { FY;R0+N
return queue[1]; V2|XcR
} $T80vEi+u
u~^d5["T
public void remove() { 9"~,ha7S$
SortUtil.swap(queue,1,size--); h wfKgsm
fixDown(1); Vam4/6
} okZDxg`6
file://fixdown 6o/!H
private void fixDown(int k) { dg]: JU
int j; mC(q8%/;
while ((j = k << 1) <= size) { VlQaT7Q
if (j < size %26amp;%26amp; queue[j] j++; ~<#!yRy>r
if (queue[k]>queue[j]) file://不用交换 U#!f^@&AB
break; A5> ,e|
SortUtil.swap(queue,j,k); |cE 69UFB
k = j; nXOJ
} Z6`[dAo
} 2oFHP_HVfu
private void fixUp(int k) { As7Y4w*+
while (k > 1) { mN:p=.& <
int j = k >> 1; 1tQl^>r16
if (queue[j]>queue[k]) ?N*|S)BN
break; r8E)GBH-|
SortUtil.swap(queue,j,k); /Z*XKIU6v/
k = j; g4 |s9RMD
} JH;\wfrD
} 6-<>P E2
DVq5[ntG
} .3.oan*i
gf8DhiB
} ESl</"<J
$NtbI:e{
SortUtil： _*O^|QbM
+5+?)8Ls
package org.rut.util.algorithm; n^AQ!wC
2& l~8,
import org.rut.util.algorithm.support.BubbleSort; hs"=>(P)
import org.rut.util.algorithm.support.HeapSort; "NamP\hj
import org.rut.util.algorithm.support.ImprovedMergeSort; hkq[xgX
import org.rut.util.algorithm.support.ImprovedQuickSort; ZsPT!l,
import org.rut.util.algorithm.support.InsertSort; t:G67^<3
import org.rut.util.algorithm.support.MergeSort; C"P40VQoo
import org.rut.util.algorithm.support.QuickSort; ,:QzF"MV
import org.rut.util.algorithm.support.SelectionSort; (ft8,^=4
import org.rut.util.algorithm.support.ShellSort; >wpC45n)9N
f|f9[h'
/** ,NQucp
* @author treeroot D|}%(N@sl
* @since 2006-2-2 b!R\u1b
* @version 1.0 U h'1f7%
*/ Q~A25Jf.
public class SortUtil { 2=TQU33#
public final static int INSERT = 1; Uva b*9vX
public final static int BUBBLE = 2; (*Jcx:rH
public final static int SELECTION = 3; .(0'l@#fT
public final static int SHELL = 4; aArgKM f
public final static int QUICK = 5; v/E_A3Ay&
public final static int IMPROVED_QUICK = 6; y[s* %yP3l
public final static int MERGE = 7; 8)D5loS
public final static int IMPROVED_MERGE = 8; Ck|3DiRQ
public final static int HEAP = 9; !kl9X-IiI
SWYIQ7*
public static void sort(int[] data) { ;:[!I]E0
sort(data, IMPROVED_QUICK); 2?9SM@nAY
} q7 ;TdQ
private static String[] name={ $Xf gY1S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9wPc03a
}; B%c):`w8]
e.<$G'
private static Sort[] impl=new Sort[]{ oc>ne]_'
new InsertSort(), v^a. b
new BubbleSort(), gm63dE>
new SelectionSort(), Q}a 1P8?S
new ShellSort(), tf?u ;n
new QuickSort(), WdGjvs
new ImprovedQuickSort(), s 9,?"\0Zm
new MergeSort(), "-'w,g
new ImprovedMergeSort(), Efm37Kv5l
new HeapSort() Q3M;'m
}; "0F =txduS
}2^_Gaj
public static String toString(int algorithm){ OA\2ja~+
return name[algorithm-1]; $DmWK_A
} <Q06<{]R8
8$:4~:]/
public static void sort(int[] data, int algorithm) { >g!a\=-[
impl[algorithm-1].sort(data); n1n1}
} !4 4)=xW
dcMWCK
public static interface Sort { #HD$=ECcw
public void sort(int[] data); x:`]uOp
} sglYT!O
5TqT`XTzm
public static void swap(int[] data, int i, int j) { ~N+bD
int temp = data; E-NuCP%|c
data = data[j]; <n iq*
data[j] = temp; `zNvZm-E
} ;&Q8xC2
} jlV~-}QKb7