[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; 8qk?E6
} Pj#<K%Bz
int i1=l; c&r70L,
int i2=mid+1; X\`_3=
for(int cur=l;cur<=r;cur++){ #^`4DhQ/ 1
if(i1==mid+1) 8UW^"4
data[cur]=temp[i2++]; Sc>,lIM
else if(i2>r) M`. tf_x
data[cur]=temp[i1++]; ^WHE$4U`
else if(temp[i1] data[cur]=temp[i1++]; 0C =3dnp6
else 4iqoR$3Fc
data[cur]=temp[i2++]; -(~.6WnhS
} -d~4A
} zO~8?jDN4|
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} `Bo*{}E
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改进后的归并排序: G^~k)6v=m
88VZR&v
package org.rut.util.algorithm.support; H;?{BV
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import org.rut.util.algorithm.SortUtil; xe#FUS 3
!g?|9
/** 6 )Hwt_b
* @author treeroot XF Patd
* @since 2006-2-2 Ozw;(fDaU
* @version 1.0 ;'?l$ ._
*/ DQNnNsP:M-
public class ImprovedMergeSort implements SortUtil.Sort { NV)!7~r}:
1QqYQafA
private static final int THRESHOLD = 10; ZRv*!n(Ug<
Usr@uI#{J
/* 2VF%@p
* (non-Javadoc) C+?Hm1
* E4gYemuN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y)F;zW<+
*/ s8QMewU
public void sort(int[] data) { 0]>u)%
int[] temp=new int[data.length]; `sUZuWL_
mergeSort(data,temp,0,data.length-1); hhSy0
} q`|LRz&al
!$DIc
private void mergeSort(int[] data, int[] temp, int l, int r) { aHs^tPg
int i, j, k; =CK4.
int mid = (l + r) / 2; <DMl<KZ
if (l == r) *7*lE"$p
return; F|F]970
if ((mid - l) >= THRESHOLD) $u7;TW6QD
mergeSort(data, temp, l, mid); aY3^C q(r
else `kOD[*
insertSort(data, l, mid - l + 1); 'HT7_$?*
if ((r - mid) > THRESHOLD) E>&n.%
mergeSort(data, temp, mid + 1, r); |s)Rxq){"V
else N<f"]
insertSort(data, mid + 1, r - mid); ML:Q5 ^`
s<*XNNE7
for (i = l; i <= mid; i++) { $>*3/H
temp = data; O>SLOWgha
} 6Ca(U'
for (j = 1; j <= r - mid; j++) { )_1zRT|9
temp[r - j + 1] = data[j + mid]; \x)n>{3C
} W^fuScG)c
int a = temp[l]; Z= jr-)kK
int b = temp[r]; cS>e?
for (i = l, j = r, k = l; k <= r; k++) { z)'Mk[
if (a < b) { k:*S&$S!E
data[k] = temp[i++]; KQacoUHrK?
a = temp; y(Y!?X I
} else { 8'~[pMn`
data[k] = temp[j--]; K|Ld,bq
b = temp[j]; g$HwxA9Gp/
} /3A^I{e74
} e"/;7:J5\
} $P>`m$(8
S M!Txe#
/** *4_jA](
* @param data sW)Zi
* @param l }-ftyl7
* @param i n,=VQOu
*/ vLR~'"`F
private void insertSort(int[] data, int start, int len) { A6GE,FhsG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~7Ts_:E-
} GN-mrQo
} 7s"< 'cx_F
} ~2<7ZtV=
} .gG1kWA-
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堆排序： hJwC~HG5
KC(xb5x Y
package org.rut.util.algorithm.support; 3= xhoRX
8aO~/i:(.
import org.rut.util.algorithm.SortUtil; !6s"]WvF
qY~`8 x
/** ]04e1F1J
* @author treeroot XEn*?.e
* @since 2006-2-2 Ul2R'"FB
* @version 1.0 !,[C]Q1
*/ =Vy`J)z9
public class HeapSort implements SortUtil.Sort{ A$#p%yb
Xv<B1
/* (non-Javadoc) fRy^Q_~,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }| J79s2M
*/ T^T[$26
public void sort(int[] data) { GDu~d<RH
MaxHeap h=new MaxHeap(); RY c!~Wh~Y
h.init(data); Eq$&qV-?(
for(int i=0;i h.remove(); `D`sr[3n
System.arraycopy(h.queue,1,data,0,data.length); Mu{;vf|j
} ,Y|^^?'j Q
U>V&-kxtV
private static class MaxHeap{ X>NhZ5\
f 1w~!O9
void init(int[] data){ OR}c)|1
this.queue=new int[data.length+1]; yHHt(GM|o
for(int i=0;i queue[++size]=data; 0j30LXI_
fixUp(size); 9AxCiT.
} (q{Ck#+
} _<a7CCg
ua5OGx
private int size=0; k]5Bykf`Ky
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private int[] queue; fO0(Z
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public int get() { t5'V6nv
return queue[1]; qZ}P*+`Q
} F>]m3(
uq, {tV
public void remove() { 4'-|UPhx
SortUtil.swap(queue,1,size--); cx}Q2S
fixDown(1); 87:!C5e}
} d?:=PH
file://fixdown ?t+5s]
private void fixDown(int k) { EL8NZ%:v:
int j; mp9{m`Jb*
while ((j = k << 1) <= size) { &Y 4F!Rb
if (j < size %26amp;%26amp; queue[j] j++; >.'<J]
if (queue[k]>queue[j]) file://不用交换 td4[[ /
break; ^s@8VAwi
SortUtil.swap(queue,j,k); y`$Q\}fS
k = j; ]da^xWK
} rg{9UVj
} ZTU&,1Y;
private void fixUp(int k) { TQ`Rk;0R
while (k > 1) { X=Ys<TM,
int j = k >> 1; =QK$0r]c'k
if (queue[j]>queue[k]) W-.pmU e2
break; $KLD2BAL
SortUtil.swap(queue,j,k); em\ 9'L^
k = j; j'aHF#_
} :^Fh!br==
} DK=cVpN%s
)u/H>;L P
} UN%Vg:=
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} AgRjr"hF*e
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SortUtil： XuD=E
6gT5O]]#o
package org.rut.util.algorithm; {5d9$v7k4
M)+$wp
import org.rut.util.algorithm.support.BubbleSort; ,SQZD,3v4
import org.rut.util.algorithm.support.HeapSort; P%#*-zCCx
import org.rut.util.algorithm.support.ImprovedMergeSort; vk>b#%1{
import org.rut.util.algorithm.support.ImprovedQuickSort; <`jLY)sw
import org.rut.util.algorithm.support.InsertSort; = <j"M85.
import org.rut.util.algorithm.support.MergeSort; `u.t[
import org.rut.util.algorithm.support.QuickSort; QT9n,lX
import org.rut.util.algorithm.support.SelectionSort; lip[n;Ir>
import org.rut.util.algorithm.support.ShellSort; xS7$%w['
3d-%>?-ee
/** eL4NB$Fb
* @author treeroot 25NTIzI@@
* @since 2006-2-2 fZxIY,
* @version 1.0 >yXN,5d[
*/ nOQa_G]Gz
public class SortUtil { :> &fV
public final static int INSERT = 1; / }Rz=&
public final static int BUBBLE = 2; avy"r$v_&
public final static int SELECTION = 3; <,AS8^$X[
public final static int SHELL = 4; %0 #XPc("
public final static int QUICK = 5; ->h6j
public final static int IMPROVED_QUICK = 6; {CR5K9
public final static int MERGE = 7; 'S[++w?Qq
public final static int IMPROVED_MERGE = 8; a6:x"Tv
public final static int HEAP = 9; _:+ KMR
:5/Uh/sX
public static void sort(int[] data) { s;1]tD
sort(data, IMPROVED_QUICK); p-%|P]&
} xr7+$:>a
private static String[] name={ h(qQsxIOhS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?88`fJ@tk?
}; pA;-vMpMj
~+<olss_
private static Sort[] impl=new Sort[]{ +525{Tj
new InsertSort(), Iyd?|f"
new BubbleSort(), /T,Z>R
new SelectionSort(), goJ|oi
new ShellSort(), Fb/XC:AD
new QuickSort(), N$xtHtz8"
new ImprovedQuickSort(), GabYfUkO
new MergeSort(), (Y+N@d
new ImprovedMergeSort(), m=Q[\.Ra
new HeapSort() s/:Fwr4q#a
}; _/S?#
v`V7OD#:j]
public static String toString(int algorithm){ Y%|@R3[Nk
return name[algorithm-1]; IScRsxFb
} $ n,Z
'a^{=+
public static void sort(int[] data, int algorithm) { W23]Bx
impl[algorithm-1].sort(data); htm{!Z]s0
} ^uS/r#l
Z+pom7A"E
public static interface Sort { {B*W\[ns
public void sort(int[] data); 0t#g}
} "4H8A=
.+y>8h3{
public static void swap(int[] data, int i, int j) { kCUT ^
int temp = data; M,3wmW&d6
data = data[j]; Px M!U!t
data[j] = temp; W9t"aZor
} WxbsD S;
} Ufo>|A6;$