[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; $d[ -feU
} Gd=l{~
int i1=l; >%PPp.R
int i2=mid+1; +|SvJ
for(int cur=l;cur<=r;cur++){ hp:8e@
if(i1==mid+1) VlLc[eVV
data[cur]=temp[i2++]; O7KR~d
else if(i2>r) fD>0
data[cur]=temp[i1++]; ^Ko{#qbl/
else if(temp[i1] data[cur]=temp[i1++]; *CnrzrKtQ
else =2BB ~\G+
data[cur]=temp[i2++]; 9S_N*wC.
} MZ/PXY
} o{QU?H5h
C/sDyv$
} .JJ^w!|>#
@C}Hx;f6
改进后的归并排序: Gkfc@[Z V
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package org.rut.util.algorithm.support; 4 Ii@_r>
p| #gn<z}
import org.rut.util.algorithm.SortUtil; .F*2]xj@"
' YONRha
/** HJ\CGYmyz
* @author treeroot 8/4Gr8o
* @since 2006-2-2 [H3~b=
* @version 1.0 +]!`>
*/ N,><,7!q$,
public class ImprovedMergeSort implements SortUtil.Sort { kOe~0xoT@u
a%wK[yVp
private static final int THRESHOLD = 10; YBX7WZCR
.)wj{(>TJ
/* /&+6nOP
* (non-Javadoc) kZlRS^6
* i>M*ubWE4@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qwb`8o
*/ oc2aE:>X
public void sort(int[] data) { (5"BKu1t
int[] temp=new int[data.length]; E"[^^<I
mergeSort(data,temp,0,data.length-1); J{Z-4y
} 10/N-=NG18
n.m6n*sf7
private void mergeSort(int[] data, int[] temp, int l, int r) { :*2+t-
int i, j, k; @'EP$!c
int mid = (l + r) / 2; ,H3C\.%w\
if (l == r) bW`@9 =E
return; q5$z:'zE
if ((mid - l) >= THRESHOLD) !(!BW9Zt+
mergeSort(data, temp, l, mid); $E^#DjhRQ3
else zN\~v
insertSort(data, l, mid - l + 1); Lp \%-s#5s
if ((r - mid) > THRESHOLD) %qzpt{'?<
mergeSort(data, temp, mid + 1, r); 3q:-98DT
else dkV%Pyj
insertSort(data, mid + 1, r - mid); !Xwp;P=
zXB]Bf3TH
for (i = l; i <= mid; i++) { ;+-$=l3[a
temp = data; {-rK:*yP'u
} B;8YX>r
for (j = 1; j <= r - mid; j++) { Ii?"`d+JA
temp[r - j + 1] = data[j + mid]; hfY Ieb#91
} O_f|R1G5z
int a = temp[l]; 6e@ O88=
int b = temp[r]; i3.8m=>
for (i = l, j = r, k = l; k <= r; k++) { IbpE@C
if (a < b) { qYFol#=%
data[k] = temp[i++]; LnJ/t(KV
a = temp; %PG::b
} else { Y2Mti-\
data[k] = temp[j--]; {uO8VL5+Qx
b = temp[j]; +w/Ax[K
} k=[!{I
} :^SpKe(7
} I}Z[F,}*J
b?oT|@
/** A.vcE
* @param data (Jfi 3 m
* @param l qy@gW@IU
* @param i 1){1 HK
*/ 8\8uXOS
private void insertSort(int[] data, int start, int len) { RlX;c!K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -e%=Mpq.
} ?ZSG4La\
} (0W%YZ!&
} -!MDYj+U
} Bh*~I_Ta>
mW 5L;>
堆排序： Ul[>LKFY
n/s!S &
package org.rut.util.algorithm.support; d\, 4Wet;#
q4 'x'8
import org.rut.util.algorithm.SortUtil; $BE^'5G&4Y
rK~362|mo
/** )QTk5zt
* @author treeroot O6OP{sb
* @since 2006-2-2 C3 0b}2
* @version 1.0 5"y p|Yl
*/ +M@G 8l
public class HeapSort implements SortUtil.Sort{ `Dh%c%j)
8Mg4y1)RU
/* (non-Javadoc) ^V_acAuS^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z.Y7u3K.8
*/ |gxU;"2`5~
public void sort(int[] data) { ACl:~7;
MaxHeap h=new MaxHeap(); ~A8lvuw3
h.init(data); =Mn![
for(int i=0;i h.remove(); gKb4n Nt
System.arraycopy(h.queue,1,data,0,data.length); P xpz7He
} h%+8}uywZ
qvYYKu
private static class MaxHeap{ r'&9'rir2
RO wbzA)]r
void init(int[] data){ qR]4m]o
this.queue=new int[data.length+1]; v_c'npC
for(int i=0;i queue[++size]=data; #A]7cMZ'W
fixUp(size); %/etoK
} 4C01=,6ye
} AV d
>w j7Y`
private int size=0; #yr19i ?
GeHDc[7
private int[] queue; -&,NM
d*A>P
public int get() { ;S?1E:\av
return queue[1]; jcq(=7j
} D<++6HN&#
niy@'
public void remove() { #(aROTV5a
SortUtil.swap(queue,1,size--); i+&="Z@
fixDown(1); @/$mZ]|T
} oN `tZ;a
file://fixdown E=QL4*?
private void fixDown(int k) { /mD KQ<
int j; z%Z}vWn
while ((j = k << 1) <= size) { G~B V^
if (j < size %26amp;%26amp; queue[j] j++; )&R;!#;5
if (queue[k]>queue[j]) file://不用交换 G=nFs)z
break; YSa:"A
SortUtil.swap(queue,j,k); 3gabk/
k = j; JyB>,t)
} (ZEVbAY?i
} akCl05YW
private void fixUp(int k) { rM=Hd/ki5
while (k > 1) { iL,3g[g
int j = k >> 1; t9`NCng 5
if (queue[j]>queue[k]) yPQ{tS*t
break; gA[M
SortUtil.swap(queue,j,k); zfo.S[R@
k = j; "5y^s!/
} |@ldXuYb
} qFs<s<]
XdS<51 C
} &9ZIf#R
sQ)4kF&,
} i@I%$!cB
Xj@Kt|&`k
SortUtil： "LxJPt\
a<o0B{7{BM
package org.rut.util.algorithm; FN,uD:a
Bhs`Y/Ls-
import org.rut.util.algorithm.support.BubbleSort; ]_pL79y
import org.rut.util.algorithm.support.HeapSort; ^CE:?>a$
import org.rut.util.algorithm.support.ImprovedMergeSort; d:wAI|
import org.rut.util.algorithm.support.ImprovedQuickSort; nWl0R=
import org.rut.util.algorithm.support.InsertSort; A"k,T7B
import org.rut.util.algorithm.support.MergeSort; *FE<'+%
import org.rut.util.algorithm.support.QuickSort; K5ph x
import org.rut.util.algorithm.support.SelectionSort; 6,h<0j{
import org.rut.util.algorithm.support.ShellSort; \bsm#vY,
5 O6MI4:
/** mzw*6e2T
* @author treeroot :_H88/?RR
* @since 2006-2-2 a,E;R$[!
* @version 1.0 -)Vj08aP
*/ JQ1VCG
public class SortUtil { ;8v5 qz
public final static int INSERT = 1; {Eb6.
public final static int BUBBLE = 2; y5ExEXa
public final static int SELECTION = 3; z7_./ksQ
public final static int SHELL = 4; p4Y9$(X
public final static int QUICK = 5; eo80L
public final static int IMPROVED_QUICK = 6; xV6j6k
public final static int MERGE = 7; K%k,-
public final static int IMPROVED_MERGE = 8; yh)q96m-V=
public final static int HEAP = 9; fI|1@e1
#n7{ 3)
public static void sort(int[] data) { 7.t$#fzi
sort(data, IMPROVED_QUICK); c9[5)
} OG+$F
private static String[] name={ zW _'sC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L; ~=(
}; gkdjH8(2
vKt_z@{{L
private static Sort[] impl=new Sort[]{ f,#xicSB*
new InsertSort(), ;1 fML,8
new BubbleSort(), ivq4/Y]-X
new SelectionSort(), jZ;T&s
new ShellSort(), 9<ayQ*
new QuickSort(), t|m3b~Oyv
new ImprovedQuickSort(), 24Fxx9g
new MergeSort(), 34=0.{qn
new ImprovedMergeSort(), 5-*]PAC
new HeapSort() I}WJ0}R
}; v+G:,Tc"
5ZVTI,4K
public static String toString(int algorithm){ vn<S"
return name[algorithm-1]; +9X[gef8
} LcXMOT)s
1#(1Bs6X
public static void sort(int[] data, int algorithm) { t/Fe"T[,V
impl[algorithm-1].sort(data); -,dQ&Qf?
} >`:+d'Jv0
+*V; f,
public static interface Sort { FScQS.qF
public void sort(int[] data); E@FenCF
} IoA;q)
c0 |p34
public static void swap(int[] data, int i, int j) { Jy_'(hG
int temp = data; ?la_ +;m
data = data[j]; (=j!P*
data[j] = temp; K^Ht$04
} U\ued=H
} kR|y0V {K*