[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; L`K)mCr
} 0.wF2!V.
int i1=l; #*qV kPX
int i2=mid+1; _g/d/{-{Q
for(int cur=l;cur<=r;cur++){ >*gf1"
if(i1==mid+1) l<uI-RX"
data[cur]=temp[i2++]; r3U7`P
else if(i2>r) Jj[3rt?8
data[cur]=temp[i1++]; 4cSs=|m?+
else if(temp[i1] data[cur]=temp[i1++]; d+v|&yN
else TM{m:I:Z*n
data[cur]=temp[i2++]; JS8pN5
} 5]]QW3
} ty~Sf-Pri
d!:/n
} sj&(O@~R
r+[g.`
改进后的归并排序: nbP}a?XC
flqr["czwK
package org.rut.util.algorithm.support; _ymSo`IvR
hs;|,r
import org.rut.util.algorithm.SortUtil; d7b`X<=@s
0 fT*O
/** y~#5!:Be
* @author treeroot rwUhNth-Qh
* @since 2006-2-2 ^0>^5l'n
* @version 1.0 ,e1c,}
*/ p+b9D
public class ImprovedMergeSort implements SortUtil.Sort { y@*4*46v
;:[P/eg
private static final int THRESHOLD = 10; U= n
bt=D<YZk
/* 8M!9gvcaO
* (non-Javadoc) _?{KTgJG
* /rD9)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e[T3,2C
*/ XU}i<5
public void sort(int[] data) { \)\n5F:Zu
int[] temp=new int[data.length]; !vl1#@
mergeSort(data,temp,0,data.length-1); Fczia0@z
} %1;Y`>
iWW!'u$+I`
private void mergeSort(int[] data, int[] temp, int l, int r) { u SZfim@Z7
int i, j, k; N|>MqH,Bt
int mid = (l + r) / 2; <LBCu;
if (l == r) 5ip ZdQ^
return; Bt:M^b^
if ((mid - l) >= THRESHOLD) rM~Mqpk
mergeSort(data, temp, l, mid); UVi9}zr
else +gndW
insertSort(data, l, mid - l + 1); C|FI4/-e
if ((r - mid) > THRESHOLD) M-QQ
mergeSort(data, temp, mid + 1, r); b9.7j!W
else u8A,f}D 3
insertSort(data, mid + 1, r - mid); 8[^b8^
E]a,2{&8<
for (i = l; i <= mid; i++) { l3MA&&++KF
temp = data; fF/;BSq'
} p,8:(|(
for (j = 1; j <= r - mid; j++) { O>X!78]#K
temp[r - j + 1] = data[j + mid]; js)E:+{A,
} '2|mg<Ft
int a = temp[l]; uh)f/)6
int b = temp[r]; 96F+I!qC
for (i = l, j = r, k = l; k <= r; k++) { ^JIs:\g<<
if (a < b) { QB*AQ5-
data[k] = temp[i++]; dXt@x8E
a = temp; yyVJb3n5:!
} else { {2g?+8L$Z
data[k] = temp[j--]; S,+|A)\#
b = temp[j]; * e,8o2C$
} M#],#o*G
} 9J49s1
} 6 ;\>,
y>UQm|o<W
/** /WAOpf5
* @param data `a7b,d
* @param l K^AIqL8
* @param i 8.`5"9Vh
*/ p_g8d&]V
private void insertSort(int[] data, int start, int len) { \@6w;tyi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B$97"$#u
} !qs~j=;y3
} G"yhu +
} G\f:H%[5[
} 'OYnLz`"6
, YE+k`:
堆排序： ^jo*e,y:
BXl Y V"
package org.rut.util.algorithm.support; a!x?Apww
<m`Os2#
import org.rut.util.algorithm.SortUtil; ap|V}jC
c_ 1.
/** ;x{J45^
* @author treeroot )hA)`hL F
* @since 2006-2-2 uhmSp+%
* @version 1.0 Dm;aTe
*/ 8`b_,(\N
public class HeapSort implements SortUtil.Sort{ ;2eZa|M*q
`@ Ont+
/* (non-Javadoc) ss7Z-A4z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~m7?:(/lb
*/ &ujq6~#
public void sort(int[] data) { g31\7\)Ir
MaxHeap h=new MaxHeap(); 6O'B:5~[2
h.init(data); eNt1P`2[
for(int i=0;i h.remove(); LCpS}L;
System.arraycopy(h.queue,1,data,0,data.length); ? i|LO
} 5m6I:s`pK
s)~H_,
private static class MaxHeap{ /$ueLa
D z>7.'3
void init(int[] data){ +JFE\>O
this.queue=new int[data.length+1]; v.H@Ey2
for(int i=0;i queue[++size]=data; TbR Ee;1
fixUp(size); 1,G f;mcQ
} 6$$ku
} <m?/yREK2
QW@`4W0F
private int size=0; xOpCybmc
X9uYqvP\(
private int[] queue; :+S~N)0j^
(>x_fDv
public int get() { -f[95Z3}
return queue[1]; 0(!=N1l
} G?{uR6s>#
I9r> 3?
public void remove() { p8u-3
SortUtil.swap(queue,1,size--); cf1GA
fixDown(1); jJY!;f
} a s?)6
file://fixdown yy3-Xu4
private void fixDown(int k) { >9]i#So^
int j; ww{07g
while ((j = k << 1) <= size) { iX'#~eK*<
if (j < size %26amp;%26amp; queue[j] j++; :.EVvuXI
if (queue[k]>queue[j]) file://不用交换 ZzO.s$
break; #v4q:&yKf
SortUtil.swap(queue,j,k); lWYgIpw
k = j; -jsk-,
} m3K .\3
} 6/thhP3`-
private void fixUp(int k) { 3LD`Ep
while (k > 1) { ]^CNC0
int j = k >> 1; )h?Pz1-W1
if (queue[j]>queue[k]) ?qjlWCV|e
break; !+I!J s"
SortUtil.swap(queue,j,k); mo3HUXf}8
k = j; $5/lU }To
} FY;R0+N
} V2|XcR
! .|\}=[e
} '&$xLZ8
wi/dR}*A
} >)PcK
;O7<lF\7o
SortUtil： 9i+SU|;j
w[wrZ:[
package org.rut.util.algorithm; </8F
J'>i3eLq
import org.rut.util.algorithm.support.BubbleSort; tO^KCnL
import org.rut.util.algorithm.support.HeapSort; ~<#!yRy>r
import org.rut.util.algorithm.support.ImprovedMergeSort; U#!f^@&AB
import org.rut.util.algorithm.support.ImprovedQuickSort; !G3d5d2)C
import org.rut.util.algorithm.support.InsertSort; 07L1 "
import org.rut.util.algorithm.support.MergeSort; /"<o""<]
import org.rut.util.algorithm.support.QuickSort; zcNv T
import org.rut.util.algorithm.support.SelectionSort; ta 66AEc9
import org.rut.util.algorithm.support.ShellSort; PxHHh{y%c
Os-sYaW
/** Ui`Z>,0sFi
* @author treeroot (AnM_s
* @since 2006-2-2 Xm2p<Xu8h
* @version 1.0 UjU*`}k3
*/ tZ]/?+1G
public class SortUtil { }[OOkYF#r
public final static int INSERT = 1; zLiFk<G@Xi
public final static int BUBBLE = 2; 7R=cxD&
public final static int SELECTION = 3; -?$Hr\
public final static int SHELL = 4; z!GLug*j`
public final static int QUICK = 5; +MfdZD
public final static int IMPROVED_QUICK = 6; Sc zYL?w^
public final static int MERGE = 7; GwoN=
public final static int IMPROVED_MERGE = 8; le-Q&*
public final static int HEAP = 9; 24 i00s|#
A<VNttgG
public static void sort(int[] data) { amn\#_(
sort(data, IMPROVED_QUICK); *g<D p2`
} n_/_Y>{M0
private static String[] name={ hVB^:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P+~{q.|._c
}; jLs-v
~)JNevLZ
private static Sort[] impl=new Sort[]{ O+o1R24JI
new InsertSort(), VSlIeZ
new BubbleSort(), #JH#Qg
new SelectionSort(), F#w=z/
new ShellSort(), 1 f;k)x
new QuickSort(), E$'Zd,|f=
new ImprovedQuickSort(), Sb&[V>!2^
new MergeSort(), $i+ 1a0%n
new ImprovedMergeSort(), }0P5~]S<5A
new HeapSort() -&u2C}4s
}; v/E_A3Ay&
;9r`P_r
public static String toString(int algorithm){ 2%'iTXF
return name[algorithm-1]; Xk_xTzJ
} <d GGH
1h.N &;vy
public static void sort(int[] data, int algorithm) { L)cy&"L|
impl[algorithm-1].sort(data); pUs s_3
} xi.L?"^/!
y-TS?5Dr]
public static interface Sort { w34&m
public void sort(int[] data); `H5n_km
} dcgz<m
RY(\/W#$
public static void swap(int[] data, int i, int j) { "?Eh_Dw
int temp = data; s\6kXR
data = data[j]; .&AS-">Z
data[j] = temp; QGYO{S
} ?X1vU0c
} uj_ OWre