[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; rw#?NI:
} J~}i}|YC>
int i1=l; ]\F}-I[
int i2=mid+1; #c(BBTuX
for(int cur=l;cur<=r;cur++){ B:6VD /qC
if(i1==mid+1) 0,wmEV!)
data[cur]=temp[i2++]; XnB-1{a1
else if(i2>r) %FJB9?9=|
data[cur]=temp[i1++]; LJOJ2x
else if(temp[i1] data[cur]=temp[i1++]; VgO.in^q
else #]J"j]L
data[cur]=temp[i2++]; s1J(-O
} GHFYIor
} z}-8pDD'
p/gf
} 0Vj!'=Ntv
p:xVi0
改进后的归并排序: w|:ev_c|
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package org.rut.util.algorithm.support; o`.5NUn
%$F_oO7"
import org.rut.util.algorithm.SortUtil; X<d`!,bn@
[0H]L{yV
/** .[o`TlG%
* @author treeroot yGC3B00Z
* @since 2006-2-2 $1n\jN
* @version 1.0 $*C'{&2
*/ yc0_7Im?
public class ImprovedMergeSort implements SortUtil.Sort { -Xt0=3,
^-,@D+eW
private static final int THRESHOLD = 10; Nc*z?0wP
f\~A72-
/* P9M. J^<
* (non-Javadoc) l@g%A# _
* C~"b-T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jp(CBCG{F
*/ MS& 'Nj
public void sort(int[] data) { Asli<L(?`
int[] temp=new int[data.length]; }^azj>p5
mergeSort(data,temp,0,data.length-1); 1SG^X-(GM/
} :`Xg0J+P
"]B%V!@
private void mergeSort(int[] data, int[] temp, int l, int r) { Na<);Pg
int i, j, k; Mh=j^ [4Q
int mid = (l + r) / 2; Ub`vf4EB
if (l == r) w~>tpkUB
return; c"pu"t@/Z
if ((mid - l) >= THRESHOLD) -EG=}uT['b
mergeSort(data, temp, l, mid); :_kZkWD5
else bdHHOpXM
insertSort(data, l, mid - l + 1); Q@/Z~xw"'I
if ((r - mid) > THRESHOLD) vA*Q}]Ov
mergeSort(data, temp, mid + 1, r); WNF#eM?[a
else s ?|Hw|j
insertSort(data, mid + 1, r - mid); KVPWJHGr
4E@_Fn_#
for (i = l; i <= mid; i++) { n4o}}tI
temp = data; 2I{kLN1TY
} U3|9a8^H
for (j = 1; j <= r - mid; j++) { ^<Zye>KO
temp[r - j + 1] = data[j + mid]; WU~L#Ih.V
} uYXkD#{
int a = temp[l]; yE|hA2G?0
int b = temp[r]; EU.!/'<
for (i = l, j = r, k = l; k <= r; k++) { ~c@@m\C"b
if (a < b) { qb+Gjgp
data[k] = temp[i++]; g])iU9)8
a = temp; ,YF1*69
} else { KdC'#$
data[k] = temp[j--]; mJ+mTA5bW
b = temp[j]; =}2k+v-B
} {11xjvAD
} mj&$+zM>
} =a(]@8$!1
T}K@ykT
/** *V{Y.`\
* @param data KB8_yo{y
* @param l yo :63CPP
* @param i F-GH?sfvi
*/ [m(n-MuF
private void insertSort(int[] data, int start, int len) { a6 w'.]m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Wx|De7*
} 5?8jj
} &)!4rABn
} f*Yr*yC
} &p5^Cjy L
~$m:j];
堆排序： l{hO"fzy
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package org.rut.util.algorithm.support; 'LC0hoV
+$#ytvDy
import org.rut.util.algorithm.SortUtil; "-g5$v$de
?7TuE!!M
/** bkiMF$K,K
* @author treeroot E6fs&
* @since 2006-2-2 6\xfoy|j
* @version 1.0 :*eJ*(M
*/ ]BfJ~+ N
public class HeapSort implements SortUtil.Sort{ b 4A1M
[vOk=
/* (non-Javadoc) $.3J1DU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dlBr2 9
*/ N[kl3h%q
public void sort(int[] data) { lCGEd 3
MaxHeap h=new MaxHeap(); %:\GYs(Y
h.init(data); A}_0iwG
for(int i=0;i h.remove(); HEm XB=
System.arraycopy(h.queue,1,data,0,data.length); Wcki=ac\v!
} x| r#
.qrS[ w
private static class MaxHeap{ G'mg-{
t(xe*xS
void init(int[] data){ Xr{ r&Rl
this.queue=new int[data.length+1]; Yduj3Ht:w
for(int i=0;i queue[++size]=data; I$*LMzve
fixUp(size); G!7A]s>C
} petq6)g?
} =h[;'v{
?gG%FzfQ/
private int size=0; $'COsiK7
)p[Qj58
private int[] queue; n7hjYNJ
LrdX^_,nt
public int get() { N'YQ6U
return queue[1]; `: 9n ]xP
} F{laA YE
;n.SRy6
public void remove() { &_,.*tha
SortUtil.swap(queue,1,size--); '}E"Mdb
fixDown(1); eOJ_L]y-
} `bW0Va N
file://fixdown )|KZGr
private void fixDown(int k) { R*VEeLx
int j; }ni@]k#q<
while ((j = k << 1) <= size) { ek`6 Uf
if (j < size %26amp;%26amp; queue[j] j++; ^_k`@SU
if (queue[k]>queue[j]) file://不用交换 rmPJid[8B~
break; Wt!8.d}=
SortUtil.swap(queue,j,k); "B*UZ.cC
k = j; -*W\$P
} '3 JVUHn
} Iy Vmz'
private void fixUp(int k) { lQG;WVqW
while (k > 1) { C5=m~
int j = k >> 1; [S?`OF12
if (queue[j]>queue[k]) Og?P5&C"9D
break; fnK H<
SortUtil.swap(queue,j,k); wN:vI(C
k = j; sq+cF/jo6
} ?6 "B4%7b
} na3lbwq
Ie4Xk
} bDnT><eH
Wo6C0Z3g}
} I|_U|H!`
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SortUtil： __[bKd.
_m3#g1m{
package org.rut.util.algorithm; #|F5Kh"
.cs4AWml<
import org.rut.util.algorithm.support.BubbleSort; vUB*Qm]Y\
import org.rut.util.algorithm.support.HeapSort; 'S6JpWG1
import org.rut.util.algorithm.support.ImprovedMergeSort; vxXrVPU3
import org.rut.util.algorithm.support.ImprovedQuickSort; =/(R_BFna
import org.rut.util.algorithm.support.InsertSort; wSG!.Ejc7
import org.rut.util.algorithm.support.MergeSort; J1Oe`my
import org.rut.util.algorithm.support.QuickSort; lSBu,UQP
import org.rut.util.algorithm.support.SelectionSort; y~Vl0f;
import org.rut.util.algorithm.support.ShellSort; O]G3l0
}ssL;q
/** F,@uYMQs
* @author treeroot pI}6AAs}Z
* @since 2006-2-2 WTwura,
* @version 1.0 M^0^l9w
*/ i?6#>;f
public class SortUtil { #fq&yjl#A
public final static int INSERT = 1; 6d;RtCENo
public final static int BUBBLE = 2; '@WS7`@-y
public final static int SELECTION = 3; Je=k.pO1
public final static int SHELL = 4; <UbLds{+Uo
public final static int QUICK = 5; \6vr)1~N>
public final static int IMPROVED_QUICK = 6; ~--F?KUnL
public final static int MERGE = 7; |yi#6!}^
public final static int IMPROVED_MERGE = 8; 6&6t=
public final static int HEAP = 9; nmClP
53l!$#o
public static void sort(int[] data) { vd0uI#g%#
sort(data, IMPROVED_QUICK); .`/6[Zp
} c='uyx
private static String[] name={ 2@:Ztt6~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jB3Rue:+g
}; =|IY[2^
4Vv$bbu+
private static Sort[] impl=new Sort[]{ T:S[[#f{5
new InsertSort(), R'h.lX
new BubbleSort(), }W nvz;]B
new SelectionSort(), isor%R!
new ShellSort(), +}Qq#^:_\
new QuickSort(), .r \g]
new ImprovedQuickSort(), C@rIyBj1g
new MergeSort(), ;bkvdn}
new ImprovedMergeSort(), 0"koZd,c
new HeapSort() kw5`KfG9
}; [cw>; \J
0E/16@6=
public static String toString(int algorithm){ oe{,-<yck
return name[algorithm-1]; |[MtUWEW
} A8j$c~
@^,9O92l
public static void sort(int[] data, int algorithm) { jGtu>|Gj
impl[algorithm-1].sort(data); MmD1@fW32#
} rl:D>t(:.
eI=:z/pd
public static interface Sort { hGj`IAW
public void sort(int[] data); z;PF%F
} T;{"lp.
G>S3?jGk
public static void swap(int[] data, int i, int j) { C ,[q#D4
int temp = data; sdXZsQw
data = data[j]; FXFyF*w2
data[j] = temp; 1_5]3+r_U-
} -~&T0dt~
} %VwkYAgA