[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; Af(WV>'
} 5*-3? <)e
int i1=l; <wd]D@l7r
int i2=mid+1; +9;2xya2
for(int cur=l;cur<=r;cur++){ fS&6
if(i1==mid+1) sW@krBxMv
data[cur]=temp[i2++]; 6<76H
else if(i2>r) T^.Cc--c
data[cur]=temp[i1++]; aM3gRp51cj
else if(temp[i1] data[cur]=temp[i1++]; Wr?'$:
else 7:E!b=o#
data[cur]=temp[i2++]; E%N2k|%8d_
} zZ-\a[F
} o4y']JSN
~FU@wV^
} eD?3"!c!
j]rz]k
改进后的归并排序: /0MDISQy9
*# {z3{+
package org.rut.util.algorithm.support; ?Bi*1V<R
z(y*hazK
import org.rut.util.algorithm.SortUtil; "tk-w{>
"Zv~QwC
/** }f}}A=
* @author treeroot %kshQ%P)?
* @since 2006-2-2 ~a9W3b4j
* @version 1.0 T1WWK'
*/ *iA4:EIP
public class ImprovedMergeSort implements SortUtil.Sort { ?#A]{l
8hanzwoJ:
private static final int THRESHOLD = 10; Ol_q{^
#dxgB:l)%l
/* JYb}Zw;
* (non-Javadoc) 2/ rt@{V(
* 2BXy<BM @
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~nLN`Hd
*/ bC!`@/
public void sort(int[] data) { >o,^b\
int[] temp=new int[data.length]; ,MPB/j^o5!
mergeSort(data,temp,0,data.length-1); Gbpw5n;e
} rZXrT}Xh{W
1Tp/MV/>
private void mergeSort(int[] data, int[] temp, int l, int r) { $g9**b@
int i, j, k; k;W@LfP
int mid = (l + r) / 2; OHrY(I6
if (l == r) ZD/jX_!t
return; I?#85l{>
if ((mid - l) >= THRESHOLD) 9p* gU[
mergeSort(data, temp, l, mid); HvwYm.$zE
else `mfq 2bVc
insertSort(data, l, mid - l + 1); /UcV
if ((r - mid) > THRESHOLD) iSLGwTdLn
mergeSort(data, temp, mid + 1, r); zw<p74DH
else . 5y"38e
insertSort(data, mid + 1, r - mid); ZzGahtx)Y
ym,H@~
for (i = l; i <= mid; i++) { iRo.RU8>
temp = data; ;h=*!7:
} #FOqP!p.E
for (j = 1; j <= r - mid; j++) { Cs3^9m6;d
temp[r - j + 1] = data[j + mid]; y;cUl, :v
} zdl%iop3e
int a = temp[l]; 7R.Q Ql
int b = temp[r]; EI~"L$?
for (i = l, j = r, k = l; k <= r; k++) { .jw}JJ
if (a < b) { {]*x*aa\
data[k] = temp[i++]; _9H*agRe
a = temp; 3chPY4~A
} else { (:V>Hjt
data[k] = temp[j--]; +ECDD'^!
b = temp[j]; :,12")N
} ] Wy)
} Psura$:
} [&[^G25
hY5WJ;
/** $3T_.
* @param data ,fDEz9-,
* @param l IzOYduJ.
* @param i 4BYE1fUzd
*/ EI>6Nh
private void insertSort(int[] data, int start, int len) { %=we`&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '7Nr8D4L
} Cb t{H}I3
} ]M>9ULQ
} N]EcEM#
} d6{Gt"
f*{ YFg?*&
堆排序： sxKf&p;
:AdDLpk3j
package org.rut.util.algorithm.support; -~[9U,
/^{BUo
import org.rut.util.algorithm.SortUtil; Jf)bHjC_V
JCcZuwu[
/** 9fnA
* @author treeroot #o/H~Iv
* @since 2006-2-2 5Z/GK2[HL
* @version 1.0 hRI"y":zD
*/ cq&*.
public class HeapSort implements SortUtil.Sort{ 'TC/vnM
.MW@;
/* (non-Javadoc) &;,,H< p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1(Y7mM8\
*/ m"\:o
public void sort(int[] data) { `!:q;i]}
MaxHeap h=new MaxHeap(); 1% F?B-k
h.init(data); <$w?/y/'
for(int i=0;i h.remove(); u cwnA
System.arraycopy(h.queue,1,data,0,data.length); 9j]sD/L5q
} HmfG$Z
X:a`B(@S
private static class MaxHeap{ N..j{FE
<}U'V}g
void init(int[] data){ L9Z;:``p
this.queue=new int[data.length+1]; RgorkZlVM
for(int i=0;i queue[++size]=data; l\AMl \
fixUp(size); .?p\n7
} /&& 2u7*
} do-ahl,
aSuM2
private int size=0; H.<a`mm8
e~ aqaY~}
private int[] queue; [3l*F
n%R;-?*v
public int get() { FlfI9mm
return queue[1]; zl-2$}<a
} V@7KsB
K3uG2g(>2
public void remove() { v%k9M{
SortUtil.swap(queue,1,size--); TSAU?r\P
fixDown(1); ^=n+T7"J
} @D-AO_
file://fixdown GLn{s
private void fixDown(int k) { i&njqK!wS
int j; 9YsR~SM
while ((j = k << 1) <= size) { F62V3 Xy
if (j < size %26amp;%26amp; queue[j] j++; IW8+_#d
if (queue[k]>queue[j]) file://不用交换 7"7rmZ
break; Q$obOEr2(
SortUtil.swap(queue,j,k); )%SkJ
k = j; x:vu'A
} !3iGz_y
} rhpPCt
private void fixUp(int k) { zWpqJK
while (k > 1) { ZKQ hbNT
int j = k >> 1; bWl5(S` Z
if (queue[j]>queue[k]) 4L-:*b_v\
break; {7cX#1
SortUtil.swap(queue,j,k); EM7+VO(
k = j; 2oa#0`{
} %8*64T")
} n .!Ym X4
>@WX>0`ht
} X1IeSMAe
}?cGf-c
} tt%MoQ)
A*./,KT
SortUtil： JOjoiA
5Zmw} M
package org.rut.util.algorithm; oLWJm
i{!T&8
import org.rut.util.algorithm.support.BubbleSort; ,D\GGRw
import org.rut.util.algorithm.support.HeapSort; nA|.t[v
import org.rut.util.algorithm.support.ImprovedMergeSort; S[tE&[$(p
import org.rut.util.algorithm.support.ImprovedQuickSort; mrm^e9*Z
import org.rut.util.algorithm.support.InsertSort; >FhK#*Pa
import org.rut.util.algorithm.support.MergeSort; ,f}UGd[a
import org.rut.util.algorithm.support.QuickSort; i>EgG5iJ
import org.rut.util.algorithm.support.SelectionSort; 7NC=*A~
import org.rut.util.algorithm.support.ShellSort; < B_Vc:Q
9ukg}_Hx
/** D+~_TA
* @author treeroot s[8@*/ds
* @since 2006-2-2 2&+#Vsm`V
* @version 1.0 J--m[X
*/ T081G`li
public class SortUtil { MYBx&]!\
public final static int INSERT = 1; yCJFo
public final static int BUBBLE = 2; r]W
public final static int SELECTION = 3; 7nbB^2
public final static int SHELL = 4; 79\JxiSB
public final static int QUICK = 5; >0{S
public final static int IMPROVED_QUICK = 6; U yw-2]!n
public final static int MERGE = 7; s5RjIa0$7
public final static int IMPROVED_MERGE = 8; v+jsC`m
public final static int HEAP = 9; KXV[OF&J
AtR?J"3E
public static void sort(int[] data) { *lef=:&,,
sort(data, IMPROVED_QUICK); 5XuT={o
} i"|$(2
private static String[] name={ fzjU<?}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" | ohL]7b<
}; T&86A\D\z
"x@='>:$
private static Sort[] impl=new Sort[]{ p8s:g~ W
new InsertSort(), "<}&GcJbz
new BubbleSort(), J5h+s-'
new SelectionSort(), +A~\tK{
new ShellSort(), e4~>G?rM_
new QuickSort(), "Jjs"7
new ImprovedQuickSort(), F}"]92
new MergeSort(), LqdY Qd51
new ImprovedMergeSort(), j)t+jcMUI
new HeapSort() & cNy
}; jCTAKaq
+0),xu
public static String toString(int algorithm){ Qu,8t8
return name[algorithm-1]; d:G]1k;z
} I@Xn3oN
AxxJk"v'y
public static void sort(int[] data, int algorithm) { .^$YfTabq
impl[algorithm-1].sort(data); JQ:Ri
} OB~X/
ExHKw~y9
public static interface Sort { \5Vde%!$Z
public void sort(int[] data); ) 'j:
} [~:-&
SWp1|.=Sm
public static void swap(int[] data, int i, int j) { =)O,`.M.Y
int temp = data; ogFKUD*h&>
data = data[j]; Le"oAA#[
data[j] = temp; syip;;
} lnE+Au'
} 2MA]jT