[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; C+[%7vF1
} YHNR3
int i1=l; Snp|!e
int i2=mid+1; d)f@ 5/<
for(int cur=l;cur<=r;cur++){ Y3.$G1{#0w
if(i1==mid+1) X cr =
data[cur]=temp[i2++]; r{\1wt
else if(i2>r) >r`b_K
data[cur]=temp[i1++]; &|>S|
else if(temp[i1] data[cur]=temp[i1++]; \B F*m"lz
else 1"Z@Q`}
data[cur]=temp[i2++]; 4iAZ+l5&
} 'c2W}$q
} De7Ts
=4V&*go*\
} ZkL8e
dQoYCS}IaV
改进后的归并排序: O[tvR:Nh
f-DL:@crU
package org.rut.util.algorithm.support; P-F)%T[
3LDS Z1f
import org.rut.util.algorithm.SortUtil; A.<H>=Z#O
H]Hv;fcC
/** fjvN$NgVs
* @author treeroot r/pH_@
* @since 2006-2-2 Grs]d-xI
* @version 1.0 4BnSqwa_
*/ `E+Jnu,jC
public class ImprovedMergeSort implements SortUtil.Sort { KT]Pw\y5
? WJ> p
private static final int THRESHOLD = 10; ^`un'5Vk
S$KFf=0
/* 4tL<q_
* (non-Javadoc) ~wg:!VWA)
* X%yO5c\l2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]7-&V-Ct*
*/ F, U*yj
public void sort(int[] data) { SGb;!T*
int[] temp=new int[data.length]; J>fQNW!{
mergeSort(data,temp,0,data.length-1); +"9hWb5
} UOQEk22
;iDPn2?6?x
private void mergeSort(int[] data, int[] temp, int l, int r) { :#dE:L;T
int i, j, k; 2,ECYie^
int mid = (l + r) / 2; \RNg|G
if (l == r) /Mb"V5S(W
return; _|h8q-[3
if ((mid - l) >= THRESHOLD) LU!dN"[k
mergeSort(data, temp, l, mid); h-iJlm
else !9 fz(9
insertSort(data, l, mid - l + 1); O=u1u}CP?
if ((r - mid) > THRESHOLD) o7IxJCL=Q
mergeSort(data, temp, mid + 1, r); *~w[eH!!
else ]HpA5q1ck
insertSort(data, mid + 1, r - mid); ~?B;!Csk
'SQG>F Uy
for (i = l; i <= mid; i++) { (sVi\R
temp = data; nUkaz*4qU
} f~}H
for (j = 1; j <= r - mid; j++) { !i=nSqW
temp[r - j + 1] = data[j + mid]; [M+f-kl
} J2uZmEt
int a = temp[l]; N0#JOu}~
int b = temp[r]; [+qCs7'
for (i = l, j = r, k = l; k <= r; k++) { v[Kxja;
if (a < b) { g{5A4|_7
data[k] = temp[i++]; >X*Mio8P#
a = temp; sz9L8f2
} else { CI3XzH\IX*
data[k] = temp[j--]; Z7 E
b = temp[j]; bWOS `5
} re> rr4@
} ?%H):r
} _X@v/sAy
cQ9q;r`%
/** {Zp\^/
* @param data T|tOTk
* @param l )7_"wD` z
* @param i S_~z-`;h!
*/ qCv20#!"|
private void insertSort(int[] data, int start, int len) { :;t #\%L/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uc|45Zxt
} xe/(
} *L!!]Q2c
} MDF%\Sx
} g2unV[()_
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堆排序： ~axjjv
CKA;.sh
package org.rut.util.algorithm.support; Rp$}YN
fxgr`nC
import org.rut.util.algorithm.SortUtil; mFHH515
4DTzSy:x
/** G7D2{J{1
* @author treeroot ;E'"Ks[GH
* @since 2006-2-2 4lZ$;:Jg
* @version 1.0 9{:O{nl
*/ eI@ q|"U
public class HeapSort implements SortUtil.Sort{ ,^S@EDq
*b];|n{
/* (non-Javadoc) iOG[>u0h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?&Pg2]g<
*/ *cyeO*
public void sort(int[] data) { a ^%"7Ri
MaxHeap h=new MaxHeap(); OQ9x*TmK
h.init(data); M,ir`"s
for(int i=0;i h.remove(); C:G8c[
System.arraycopy(h.queue,1,data,0,data.length); %Q!`NCe+[
} Iy }:F8F>g
2.d|G`
private static class MaxHeap{ |{,KRO0P
bGorH=pb5R
void init(int[] data){ @BNEiOAZ#
this.queue=new int[data.length+1]; ;[a|9TPR
for(int i=0;i queue[++size]=data; x"~~l
fixUp(size); 0q&'(-{s1
} ><=gV~7lx
} +*_5tWAc
eAqz3#_My
private int size=0; l&}y/t4%
CpJ0m-7aIH
private int[] queue; uPniLx\t:
Y[ N^p#t{
public int get() { lSH6>0#B
return queue[1]; \%p34K\
} yS=oUE$
6)BR+U
public void remove() { J+f!Ar
SortUtil.swap(queue,1,size--); WKSPBT;
fixDown(1); "]\+?
} mA{~PpSb
file://fixdown [xKd7"d/n
private void fixDown(int k) { iPrLwheb
int j; N:9>dpP}O
while ((j = k << 1) <= size) { mq%<6/YU
if (j < size %26amp;%26amp; queue[j] j++; #Z5}2soA
if (queue[k]>queue[j]) file://不用交换 asC_$tsMe
break; +CI1V>6^
SortUtil.swap(queue,j,k); ?Mee 6
k = j; 'FYJMIs
} *s;|T?~i
} O2"gj"D
private void fixUp(int k) { vp.ZK[/`
while (k > 1) { O-4C+?V
int j = k >> 1; r:]1O*
if (queue[j]>queue[k]) @9&P~mo/
break; t3+Py7qv
SortUtil.swap(queue,j,k); SI8%M=P>
k = j; gsn)Wv$h
} WAn'kA
} 9+keX{/c
>,DbNmi
} (L`j0kPN
;m2<eS`o'
} rSYi<ku
n>'Kp T9|
SortUtil： RW P<B0)
X_v[MW
package org.rut.util.algorithm; `g,8-
G-T0f
import org.rut.util.algorithm.support.BubbleSort; ~0b O}
import org.rut.util.algorithm.support.HeapSort; C2{lf^9:&
import org.rut.util.algorithm.support.ImprovedMergeSort; D0N9Ksq
import org.rut.util.algorithm.support.ImprovedQuickSort; \);4F=h}f
import org.rut.util.algorithm.support.InsertSort; vip~'
import org.rut.util.algorithm.support.MergeSort; nB] >!q
import org.rut.util.algorithm.support.QuickSort; CNww`PX,zZ
import org.rut.util.algorithm.support.SelectionSort; l|hUw
import org.rut.util.algorithm.support.ShellSort; |{@FMxn|q
B*gdgM*`
/** O=9-Qv|
* @author treeroot %K]euEqs
* @since 2006-2-2 CpQN,-4
* @version 1.0 $mCarFV-T
*/ 4BwQA#zE
public class SortUtil { z;u
public final static int INSERT = 1; %4W$Lq}
public final static int BUBBLE = 2; V:G>G'Eh0
public final static int SELECTION = 3; P<fnLQ9
public final static int SHELL = 4; Q%-di=
public final static int QUICK = 5; R-:fd!3oQ
public final static int IMPROVED_QUICK = 6; ,E.' o=Z
public final static int MERGE = 7; ] 7 _`]7p
public final static int IMPROVED_MERGE = 8; M,5"b+mX[~
public final static int HEAP = 9; sZLT<6_B
?,yj")+
public static void sort(int[] data) { .Udj@{
sort(data, IMPROVED_QUICK); sm$(Y.N
} b^[F""!e
private static String[] name={ [2|kl l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" WYc7aciJ
}; d`1I".y
=LTmr1?
private static Sort[] impl=new Sort[]{ A0%}v*
new InsertSort(), +,2Jzl'-
new BubbleSort(), $TI5vhQ
new SelectionSort(), U8(Nk\"X\
new ShellSort(), jg&E94}+
new QuickSort(), c`fG1s
new ImprovedQuickSort(), ",)Qc!^P$
new MergeSort(), aTzjm`F0
new ImprovedMergeSort(), !cGDy/|
new HeapSort() "HYQqNj?Z
}; rS1fK1dys
*Y@nVi
public static String toString(int algorithm){ RyRpl*^
return name[algorithm-1]; Pm$q]A~
} I7&_Xr
}y%oT P&
public static void sort(int[] data, int algorithm) { [{r}u
impl[algorithm-1].sort(data); &gI~LP
} Ssk}e=]
V i&*&"q
public static interface Sort { Qeu\&%C!<
public void sort(int[] data); ?h!i0Rsm
} }za[E>z
*|_"W+JC
public static void swap(int[] data, int i, int j) { I=;+n-
int temp = data; lHZU iB
data = data[j]; ^GBe)~MT
data[j] = temp; nhN);R~o"1
} X";@T.ZGut
} s[gKc'