[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; I`e$U
} A(Tqf.,G
int i1=l; 4c})LAwd&
int i2=mid+1; *:r6E
for(int cur=l;cur<=r;cur++){ *yx5G-#?
if(i1==mid+1) 0cGO*G2Xr
data[cur]=temp[i2++]; `5SLo=~
else if(i2>r) =`&7pYd,
data[cur]=temp[i1++]; aL)}S%5o?
else if(temp[i1] data[cur]=temp[i1++]; ;JpsRf!
else >JSk/]"
data[cur]=temp[i2++]; *s=jKV#
} QaVxP1V#U
} b\Wlpb=QZ
v d{`*|x
} J&hzr t
a9f!f %9
改进后的归并排序: M53{e;.kN
wP|Amn+;
package org.rut.util.algorithm.support; SRP.Mqg9
CIt%7 \c
import org.rut.util.algorithm.SortUtil; 1\t#*N
<bvbfS
/** vHydqFi9
* @author treeroot 6H]rO3[8
* @since 2006-2-2 ?'xwr)v
* @version 1.0 BB$(0mM^
*/ 7O.?I# 76
public class ImprovedMergeSort implements SortUtil.Sort { t[r<&1[&
P0mY/bBU
private static final int THRESHOLD = 10; `/e EdqT
p1BMQ?=($
/* &EUI
* (non-Javadoc) ]3KMFV}
* ce&Q}_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xr*%:TwCta
*/ 6@rebe!&=
public void sort(int[] data) { V/t/uNm
int[] temp=new int[data.length]; y^u9Ttf{
mergeSort(data,temp,0,data.length-1); Q *]d[
} {s{bnU
8*bEsc|
private void mergeSort(int[] data, int[] temp, int l, int r) { /W|=Or2oR
int i, j, k; <<SUIY@X
int mid = (l + r) / 2; vC [uEx:
if (l == r) S6d&w6
return; HL`=zB%
if ((mid - l) >= THRESHOLD) uY_vX\;67z
mergeSort(data, temp, l, mid); nt:d,H<p
else @H83Ad
insertSort(data, l, mid - l + 1); bb4 `s0
if ((r - mid) > THRESHOLD) 0[ BPmO6
mergeSort(data, temp, mid + 1, r); t@#l0lu$
else Au\j6mB
insertSort(data, mid + 1, r - mid); =xs"<Q*w>
RE<s$B$[
for (i = l; i <= mid; i++) { :>q*#vlb
temp = data; S|K#lL
} cWU9mzsE
for (j = 1; j <= r - mid; j++) { *+UgrsRk
temp[r - j + 1] = data[j + mid]; E2nsBP=5C
} A &tMj?
int a = temp[l]; G u4mP
int b = temp[r]; nOQvBc
for (i = l, j = r, k = l; k <= r; k++) { m>:zwz< ;
if (a < b) { SDbR(oV
data[k] = temp[i++]; o,q47W=7$
a = temp; yQ03&{#
} else { 2uEvu
data[k] = temp[j--]; l~C=yP(~
b = temp[j]; w=Yc(Y:h
} K2o\+t
} US'rhSV
} Chs#}=gzi
w9aLTLv-
/** n5U-D0/Q
* @param data !7>~=n_,L.
* @param l +EOd9.X\~
* @param i RG8Ek"D@
*/ \'Z^rjB
private void insertSort(int[] data, int start, int len) { $&ZN%o3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x-@}x@n&[
} bm\Zp
} DX b=Ku
} C[JGt9{Y
} }~O`(mnD}K
\2^_v' >K
堆排序： ;%<R>gDWv
R^f-j-$o]
package org.rut.util.algorithm.support; \1MMz Z4rf
8h '~*
import org.rut.util.algorithm.SortUtil; z#u<]] 5
N]|P||fC
/** %NH{%K,
* @author treeroot l\DcXgD x
* @since 2006-2-2 Q~-MB]'
* @version 1.0 RQ*oTsq
*/ O?OG`{k
public class HeapSort implements SortUtil.Sort{ U?e.)G
_qp^+
/* (non-Javadoc) HxnWM\p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sMDHg
*/ _0Z8V[
public void sort(int[] data) { [9H986=
MaxHeap h=new MaxHeap(); &57s//PrX
h.init(data); ]b&O#D9
for(int i=0;i h.remove(); #HyE-|_C
System.arraycopy(h.queue,1,data,0,data.length); ;Ob`B@!=b
} 2S@aG%-)
gw_]Y^U
private static class MaxHeap{ I=c}6
!)//b]
void init(int[] data){ g&?RQ
this.queue=new int[data.length+1]; "V>p
for(int i=0;i queue[++size]=data; ;a9`z+ K
fixUp(size); ;NPbEPL[5
} )k6O
} P^-daRb
#,jw! HO]
private int size=0; ~\o hH
l|"SM6
private int[] queue; /DE`>eJY
e .(
public int get() { iji2gWV}h
return queue[1]; H6V!W\:s
} 9~|hGo
PCX X[N
public void remove() { h7 c
SortUtil.swap(queue,1,size--); .[:2M9Rx
fixDown(1); bKac?y~S_
} v[!ZRwk4w3
file://fixdown #Nv)SCc
private void fixDown(int k) { W</\F&
int j; +<$b6^>!$
while ((j = k << 1) <= size) { SadffAvSA{
if (j < size %26amp;%26amp; queue[j] j++; +2Wijrn
if (queue[k]>queue[j]) file://不用交换 H^JwaF
break; -;RW)n^n
SortUtil.swap(queue,j,k); }WM!e"
k = j; "]kq,j^]
} 17) `CM$<[
} P0O=veCf
private void fixUp(int k) { 9^2l<4^Z
while (k > 1) { ]MaD7q>+R
int j = k >> 1; .3:s4=(f
if (queue[j]>queue[k]) ~0T,_N
break; $(N+E,XB
SortUtil.swap(queue,j,k); wdLlQD
k = j; cIB[D.
} <-s5 ;xwtS
} D]*<J"/]d
q7aH=dhw
} m5kt O^EU
kx6-8j3gD7
} /;V:<mekf
b6ui&Y8z
SortUtil： ,4Qct=%L_
.:A&5Y-
package org.rut.util.algorithm; v7#`b}'W
h%+6y
import org.rut.util.algorithm.support.BubbleSort; O]-s(8Oo3
import org.rut.util.algorithm.support.HeapSort; x!;;;iS
import org.rut.util.algorithm.support.ImprovedMergeSort; $Y=xu2u)
import org.rut.util.algorithm.support.ImprovedQuickSort; 5"^Z7+6
import org.rut.util.algorithm.support.InsertSort; Ojs^-R_
import org.rut.util.algorithm.support.MergeSort; >A*BRX"4C
import org.rut.util.algorithm.support.QuickSort; uK5 C-
import org.rut.util.algorithm.support.SelectionSort; E0_S+`o2y
import org.rut.util.algorithm.support.ShellSort; i564<1`x
mb#&yK(h
/** *jrQ-'<T
* @author treeroot +GFK!Pf
* @since 2006-2-2 ^M7pCetjdW
* @version 1.0 :Lh`Q"a
*/ ]~t4E'y)z
public class SortUtil { pGT?=/=*
public final static int INSERT = 1; p$!Q?&AV/
public final static int BUBBLE = 2; P>[,,w
public final static int SELECTION = 3; c^W \0
public final static int SHELL = 4; 6sz:rv}
public final static int QUICK = 5; x/,(G~
public final static int IMPROVED_QUICK = 6; Qm5Sf=E7Q
public final static int MERGE = 7; zTb,h
public final static int IMPROVED_MERGE = 8; Qzq3{%^x_
public final static int HEAP = 9; O0=}:HM
uj^l&"
public static void sort(int[] data) { df@G+v0_1
sort(data, IMPROVED_QUICK); atYe$Db
} _6Qb 3tl
private static String[] name={ "C'T>^qw*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !rPU5y*
}; /6Olq6V
U^Ulj/%6
private static Sort[] impl=new Sort[]{ `R@b`3*%v
new InsertSort(), aZB$%#'vR
new BubbleSort(), o@W:PmKW
new SelectionSort(), T.GB*
new ShellSort(), ,!Q^"aOT:
new QuickSort(), j@C*kj;-
new ImprovedQuickSort(), b5t:">wC
new MergeSort(), )L/o|%r!
new ImprovedMergeSort(), D'Y=}I)8Dn
new HeapSort() xG~7kj3
}; &p_V<\(%
Ew>lk9La(
public static String toString(int algorithm){ $4u8"ne)
return name[algorithm-1]; =+"=|cQ
} K3-Cuku
8XhGo2zf
public static void sort(int[] data, int algorithm) { |Wz`#<t
impl[algorithm-1].sort(data); CaqqH`/E4
} L{uQ:;w1
/ &#b*46
public static interface Sort { C{2y*sx
public void sort(int[] data); {~{</ g/
} C)R#Om
P?$Iht.^
public static void swap(int[] data, int i, int j) { EU4j'1!&g<
int temp = data; .g52p+Z#
data = data[j]; a`_w9r+v
data[j] = temp; ObEp0-^?
} WR5W0!'Tf
} }/g1s71