[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; @~"h62=] -
} j~[z2tV
int i1=l; H[U!%Z
int i2=mid+1; 3cK I
for(int cur=l;cur<=r;cur++){ 0tT(W^ho g
if(i1==mid+1) 2{H@(Vgpbr
data[cur]=temp[i2++]; Dv5D~on{
else if(i2>r) #_^Lb]jkM
data[cur]=temp[i1++]; gc-@"wI?
else if(temp[i1] data[cur]=temp[i1++]; G}b]w~ML~
else #Y a4ps_
data[cur]=temp[i2++]; YUtC.TR1
} RC7]'4o
} 4NheWM6
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} 5YeM%%-S
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改进后的归并排序: 3KlbP
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package org.rut.util.algorithm.support; i@"@9n~
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import org.rut.util.algorithm.SortUtil; q_A!'sm@)
EyJJ0
/** (MxQ+D\
* @author treeroot l5!|I:/*;
* @since 2006-2-2 @tNzQ8
* @version 1.0 k@RDvn
*/ 8]/bK5`
public class ImprovedMergeSort implements SortUtil.Sort { v3~?;f,l
}ppN k:B
private static final int THRESHOLD = 10; <Tzrj1"Q3
D9^h; 8
/* Z>:NPZODf
* (non-Javadoc) Vc&!OE
* p6>Svcc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6t[+pL\b
*/ 7)`nD<j5
public void sort(int[] data) { mHdA2
int[] temp=new int[data.length]; i&bA2p3+d
mergeSort(data,temp,0,data.length-1); nP$Ky1y G
} v_+{'F
PUp6Q;AdQ
private void mergeSort(int[] data, int[] temp, int l, int r) { y" RF;KW>
int i, j, k; [1g8*j~L
int mid = (l + r) / 2; AG`L64B
if (l == r) A5c%SCq;
return; KX,S
if ((mid - l) >= THRESHOLD) ;=)k<6
mergeSort(data, temp, l, mid); wh$sn:J
else iVhJ t#_b
insertSort(data, l, mid - l + 1); >E;uU[v)I
if ((r - mid) > THRESHOLD) Lb:g4A"
mergeSort(data, temp, mid + 1, r); qeVfE_<
else J=9FRC
insertSort(data, mid + 1, r - mid); P{kur} T
/M1ob:m
for (i = l; i <= mid; i++) { ;DqWh0
temp = data; !;q&NHco
} _{I3i:f9X8
for (j = 1; j <= r - mid; j++) { +"\sc;6m.
temp[r - j + 1] = data[j + mid]; P+@/O
} 0L2F[TN
int a = temp[l]; DR5\45v
int b = temp[r]; 36}?dRw#p
for (i = l, j = r, k = l; k <= r; k++) { o4G?nvK-
if (a < b) { CGW.I$u
data[k] = temp[i++]; T*Y~\~Jhu
a = temp; [kVS O
} else { a!6{:8Zi0
data[k] = temp[j--]; KKja/p
b = temp[j]; (y=C_wvqZ
} }aa'\8
} ,>bh$|
} SA&Rep^
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/** c69C
* @param data lk/n}bx
* @param l Qp)v?k ]
* @param i Vz~{UHH6
*/ ?8npG]L)
private void insertSort(int[] data, int start, int len) { tU}h~&M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @K &GJ
} B3pCy~*5
} o |{5M|nD
} 7OcWC-<
} `x+ B+)0X
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堆排序： |GdUL%1hnC
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package org.rut.util.algorithm.support; xK *b1CB
Qf~vZtJ+J
import org.rut.util.algorithm.SortUtil; I5k$H$
^cOUQ33
/** sJB;3"~
* @author treeroot :KQ~Cb
* @since 2006-2-2 I:R[;TB?y
* @version 1.0 ~^NtO
*/ u1J0$
public class HeapSort implements SortUtil.Sort{ Ec!"O3%!M^
8bTn^!1
/* (non-Javadoc) RuLi,'u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sj%u)#Ub
*/ >{q]&}^U
public void sort(int[] data) { C)um9}
MaxHeap h=new MaxHeap(); [<lHCQXJ/
h.init(data); )Kc<j!8-[
for(int i=0;i h.remove(); $SlIr<'*"
System.arraycopy(h.queue,1,data,0,data.length); {{$Nqn,pH
} RD!&LFz/}
&jS>UsGh
private static class MaxHeap{ z Xg3[orF
xT3BHnQ(
void init(int[] data){ pj\u9 L_
this.queue=new int[data.length+1]; R5N%e%[
for(int i=0;i queue[++size]=data; VACQ+
fixUp(size); 0at/c-K`
} jZu[n)u'C
} {3|t;ZHk
|B?cVc0
private int size=0; g#"zQvON
C8J[Up
private int[] queue; @:oXN]+ _
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public int get() { Yxr>"KH6a
return queue[1]; , Rk9N
} ax"+0L{
^=GC3% J
public void remove() { ui<N[
SortUtil.swap(queue,1,size--); |UkR'Ma
fixDown(1); E(*0jAvO[z
} J?*1*h
file://fixdown DwM)r7<Ex
private void fixDown(int k) { U\g/2dM
int j; iowTLq!?
while ((j = k << 1) <= size) { Gj1&tjK
if (j < size %26amp;%26amp; queue[j] j++; 0\X\izQ5
if (queue[k]>queue[j]) file://不用交换 d6Ht2
break; "|x^|n8i
SortUtil.swap(queue,j,k); %v=*Wb\3|
k = j; =ElO?9&
} X:A^<L ~
} L^r#o-H<
private void fixUp(int k) { GB23\Yv
while (k > 1) { >@U*~Nz
int j = k >> 1; ] ]u s %
if (queue[j]>queue[k]) 216RiSr*
break; TJ2=m9Z
SortUtil.swap(queue,j,k); {0[tNth'h
k = j; >BV^H.SO|1
} x) ,eI'mf
} ]3D0R;
b_$4V3TA
} ayn)5q/z
:">!r.Q
} Uf1!qP/H?
NpE*fR')
SortUtil： 4zXFuTr($
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package org.rut.util.algorithm; G0CW}e@)
+>8'mf
import org.rut.util.algorithm.support.BubbleSort; jte.Xy~g
import org.rut.util.algorithm.support.HeapSort; 0.\/\V:H6
import org.rut.util.algorithm.support.ImprovedMergeSort; 1jx:;j
import org.rut.util.algorithm.support.ImprovedQuickSort; -"R2
import org.rut.util.algorithm.support.InsertSort; ?j'7l=94A
import org.rut.util.algorithm.support.MergeSort; ;!>rnxB?4
import org.rut.util.algorithm.support.QuickSort; J!AgBF N4
import org.rut.util.algorithm.support.SelectionSort; I&fozO
import org.rut.util.algorithm.support.ShellSort; Z-$[\le
TYy?KG>:'
/** eVEV}`X
* @author treeroot 4n#M
* @since 2006-2-2 .8 2P(}h
* @version 1.0 XD!W: uvb
*/ ]tim,7s
public class SortUtil { -Fi`Z$
public final static int INSERT = 1; Wvq27YK'
public final static int BUBBLE = 2; ^-TE([bW
public final static int SELECTION = 3; l#g\X'bK
public final static int SHELL = 4; Z]A{ d[
public final static int QUICK = 5; 8f_l}k$Eg
public final static int IMPROVED_QUICK = 6; 1gE [v
public final static int MERGE = 7; E:,/!9n
public final static int IMPROVED_MERGE = 8; sv2A-Dld
public final static int HEAP = 9; e|g5=2(Pr&
2A']yD
public static void sort(int[] data) { +=>,Pto<
sort(data, IMPROVED_QUICK); M=8.Bp|Ye
} ZFiee|,q
private static String[] name={ C1V|0hu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6`&a&%,O
}; ML}J\7R
pf]xqhL
private static Sort[] impl=new Sort[]{ \Q {m9fE
new InsertSort(), _jvxc'6
new BubbleSort(), [xK3F+
new SelectionSort(), B+$%*%b
new ShellSort(), !`M,XSp(
new QuickSort(), 3#WT.4k
new ImprovedQuickSort(), h!M
new MergeSort(), %Si6]3-^@
new ImprovedMergeSort(), To\QjP-
new HeapSort() FXpJqlhNv
}; TCMCK_SQL
+Te\H
public static String toString(int algorithm){ TeMHm?1^
return name[algorithm-1]; b}2ED9HG\
} mbKZJ{|4s
kq?Ms|h
public static void sort(int[] data, int algorithm) { nxO"ua
impl[algorithm-1].sort(data); ^NLmgwQ
} ! :Y:pu0
H/"-Z;0{
public static interface Sort { vRznw&^E
public void sort(int[] data); q?H|o(
} Ve8=b0&Y#j
&r[`>B{tP
public static void swap(int[] data, int i, int j) { <S5BDk
int temp = data; ?Lx24*5%
data = data[j]; .zr-:L5{
data[j] = temp; $6qh| >z.
} gLb`pCo/
} b\ X@gq