[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*! lbt
} iI1n2>V3y
int i1=l; #s-iy+/1oN
int i2=mid+1; uzOYVN$t
for(int cur=l;cur<=r;cur++){ RBKOM$7
if(i1==mid+1) xb2?lL]
data[cur]=temp[i2++]; ~EiH-z4U
else if(i2>r) (?)7)5H
data[cur]=temp[i1++]; U\@A_ B
else if(temp[i1] data[cur]=temp[i1++]; Wzq>JNny
else }=](p-]5
data[cur]=temp[i2++]; alMYk
} Yf_6PGNzX
} w&h2y4
:;;E<74e i
} =JLh?Wx
1k8x%5p
改进后的归并排序: !v|ISyK
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package org.rut.util.algorithm.support; W[bmzvJ_X
V)M1YZV{
import org.rut.util.algorithm.SortUtil; #U7_a{cn"M
's?Ai2=#
/** FVsj;
* @author treeroot pcS+o
* @since 2006-2-2 }l0&a!C
* @version 1.0 P\m7 -
*/ y7\"[<E`(V
public class ImprovedMergeSort implements SortUtil.Sort { nt1CTWKM8^
bKVj[r8D~
private static final int THRESHOLD = 10; K<sCF[
hn)a@
/* yTM3^R(
* (non-Javadoc) P,pnga3Wu
* 7k%T<;V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [dX`K`k
*/ yqOuX>m1c
public void sort(int[] data) { 7^TV~E#
int[] temp=new int[data.length]; f&@BKx
mergeSort(data,temp,0,data.length-1); a~LC+8|JW
} E:E4ulak
4-Z()F
private void mergeSort(int[] data, int[] temp, int l, int r) { Btt]R
int i, j, k; er.L7
int mid = (l + r) / 2; x<i}_@Sn_+
if (l == r) gIEl.
return; zzGYiF?
if ((mid - l) >= THRESHOLD) \kamcA
mergeSort(data, temp, l, mid); `D5HC
else X~.f7Ao[
insertSort(data, l, mid - l + 1); ~`#-d ^s:
if ((r - mid) > THRESHOLD) .S\&L-{
mergeSort(data, temp, mid + 1, r); Oeya%C5'
else d^ ZMS~\*
insertSort(data, mid + 1, r - mid); ^t"iX9
S*)1|~pRvQ
for (i = l; i <= mid; i++) { RuW!*LI
temp = data; 'Yy&G\S
} ) iQ
for (j = 1; j <= r - mid; j++) { gieJ}Bv
temp[r - j + 1] = data[j + mid]; M&Y .;
} ~=r^3nZR/J
int a = temp[l]; Y]`.InG@
int b = temp[r]; he3SR@\T
for (i = l, j = r, k = l; k <= r; k++) { Z^KA
if (a < b) { $.St ej1
data[k] = temp[i++]; eEc4bVQa
a = temp; uUR~&8ERX
} else { 2h30\/xkU
data[k] = temp[j--]; Jc4L5*Xn/
b = temp[j]; XV>JD/K2
} l?E a#
} 7[v%GoE
} {2'm^0Kl
n7LfQWc
/** Si}HX!s
* @param data I{0k
* @param l [(LV
* @param i )QKf7 [:
*/ -#`c5y}P
private void insertSort(int[] data, int start, int len) { Nw J:!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -l+P8:fL~
} kW=z+
} 5R MS(
} 2R-A@UE2
} ihL/n
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堆排序： =x#FbvV
6V9doP]i
package org.rut.util.algorithm.support; Weoj|0|t
^o?SM^
import org.rut.util.algorithm.SortUtil; dHnR_.
k ^'f[|}
/** _S0+;9fhY
* @author treeroot z:Sigo_z[
* @since 2006-2-2 {aKqXL[UP
* @version 1.0 `XTh1Z\
*/ /RZR}
public class HeapSort implements SortUtil.Sort{ B=L&bx
v'2[[u{7*
/* (non-Javadoc) FaTa(3$%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !{,F~i9
*/ 3{%LS"c
public void sort(int[] data) { Y>."3*^
MaxHeap h=new MaxHeap(); w^k;D,h
h.init(data); `i~ Y Fr
for(int i=0;i h.remove(); UUo;`rkT
System.arraycopy(h.queue,1,data,0,data.length); 0Y=![tO8
} FX<b:#
IHfzZHy
private static class MaxHeap{ MjfFf} @
Z[!d*O%R_
void init(int[] data){ T70QJ=,
this.queue=new int[data.length+1]; %WG9 dYdS
for(int i=0;i queue[++size]=data; $$Vt7"F
fixUp(size); ~Aad9yyi
} 9&%fq)gS
} /T^ JS
Hk_y/97OO
private int size=0; nq}Q
y]..=z_ql
private int[] queue; 7DW]JK l
p_*M:P1Ma4
public int get() { f"#m=_Xm
return queue[1]; M/PFPJ >`
} p5=|Y^g !
qJ!Z~-hS
public void remove() { \ A1uhHP!
SortUtil.swap(queue,1,size--); iq#b#PYA
fixDown(1); '[|+aJ
} Z0!5d<
file://fixdown Zd^6ulx
private void fixDown(int k) { Eh</? Qv\
int j; A$0H .F>
while ((j = k << 1) <= size) { -W{DxN1
if (j < size %26amp;%26amp; queue[j] j++; F+ <Z<q
if (queue[k]>queue[j]) file://不用交换 "eWk#/
break; WS-dS6Q}
SortUtil.swap(queue,j,k); p?[Tm*r
k = j; `J<*9dq%
} 5hj
} N/YWby=H
private void fixUp(int k) { Jk|Q`h
while (k > 1) { e:E0"<
int j = k >> 1; "]'?a$\ky:
if (queue[j]>queue[k]) ~0$NJrUy
break; q>f<u&
SortUtil.swap(queue,j,k); exh/CK4;
k = j; .LVQx
} rD?L
} T J^u"j-'
I&?Qq k
} ;Mm7n12z C
D.D$#O_n.S
} \y6OUM2y
#Lsnr.80
SortUtil： sb:d>6
dca;'$
package org.rut.util.algorithm; GWsE;
{l_{T4xToB
import org.rut.util.algorithm.support.BubbleSort; Yw5'6NU
import org.rut.util.algorithm.support.HeapSort; ~pa!w?/bQ
import org.rut.util.algorithm.support.ImprovedMergeSort; kK8itO
import org.rut.util.algorithm.support.ImprovedQuickSort; A[G0 .>Wk
import org.rut.util.algorithm.support.InsertSort; yJuQ8+vgR}
import org.rut.util.algorithm.support.MergeSort; tH=P6vY
import org.rut.util.algorithm.support.QuickSort; b[z]CP
import org.rut.util.algorithm.support.SelectionSort; }:: S0l
import org.rut.util.algorithm.support.ShellSort; PcB_oG g
F4=}}kU
/** xI,2LGO
* @author treeroot sGvIXD
* @since 2006-2-2 pEECHk
* @version 1.0 r&-m=Kk$
*/ ,mRyQS'F
public class SortUtil { }QZQ3@
public final static int INSERT = 1; zf3v5Hk
public final static int BUBBLE = 2; 9nu3+.&P
public final static int SELECTION = 3; IwGqf.!.>
public final static int SHELL = 4; **69rN
public final static int QUICK = 5; TW !&p"Us+
public final static int IMPROVED_QUICK = 6; !lo/xQ<
public final static int MERGE = 7; MX@IHc
public final static int IMPROVED_MERGE = 8; ^ 9!!;)
public final static int HEAP = 9; $d?.2Kg
9@Cv5L?p\
public static void sort(int[] data) { tabT0
sort(data, IMPROVED_QUICK); 5zON}"EC
} X.`~>`8
private static String[] name={ fM^[7;]7e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "RIZV
}; `6+"Z=:
+iOKbc'
private static Sort[] impl=new Sort[]{ VK@!lJu!
new InsertSort(), 0527Wj
new BubbleSort(), "`N-*;*W
new SelectionSort(), KZPEG!-5
new ShellSort(), $1ndKB8)`J
new QuickSort(), }1IpON
new ImprovedQuickSort(), uslQ*7S[^
new MergeSort(), 4tY ss
new ImprovedMergeSort(), HaIM#R32T
new HeapSort() ,AT[@
}; \TU3rk&X
[z7bixN
public static String toString(int algorithm){ >LDhU%bH
return name[algorithm-1]; b+Br=Fv"T
} _UuC,Pl3
s.8{5jVG
public static void sort(int[] data, int algorithm) { w6j/ Dq!
impl[algorithm-1].sort(data); 4*$G & TX
} _YRE (YZ/
{T].]7Z
public static interface Sort { + nF'a(
public void sort(int[] data); AlJ} >u
} Q|@4bzi)
3do)Vg4
public static void swap(int[] data, int i, int j) { }V\N16f
int temp = data; ({o'd=nO
data = data[j]; 1@$Ko5
data[j] = temp; )m. 4i=X
} qgrg CJ
} m4*@o?Ow