[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; IFofFXv_
} G3^]Wwu
int i1=l; / i2-h
int i2=mid+1; u>6/_^iq
for(int cur=l;cur<=r;cur++){ F5[ITK]A4
if(i1==mid+1) ^>{;9lo<
data[cur]=temp[i2++]; VDjIs UUX
else if(i2>r) +/86w59
data[cur]=temp[i1++]; 1|w:xG^
else if(temp[i1] data[cur]=temp[i1++]; ?Hxgx
else q.[[c
data[cur]=temp[i2++]; A!Ct,%
} k]9>V@C
} *js$r+4
W?J[K;<
} S_VncTIO
-f|^}j?
改进后的归并排序: B2qq C-hw?
P\6T4s
package org.rut.util.algorithm.support; ^GaPpm
ND1%s &
import org.rut.util.algorithm.SortUtil; g4SYG)'R+
Yf)|ws?!
/** k:)u7A+
* @author treeroot ^-*Tn
* @since 2006-2-2 ixHZX<6zYT
* @version 1.0 GiO#1gA
*/ OrJlHMz
public class ImprovedMergeSort implements SortUtil.Sort { _m?(O/BTx
tF g'RV{
private static final int THRESHOLD = 10; B5H&DqWzr
1\{U<Oli
/* -JhjTA
* (non-Javadoc) =&:f+!1$
* B%:9P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YGV#.
*/ m&~Dj#%(w
public void sort(int[] data) { @mRrA#E#{
int[] temp=new int[data.length]; aa%&&
mergeSort(data,temp,0,data.length-1); *([)X2A@+
} JP,(4h*
(Cd{#j<
private void mergeSort(int[] data, int[] temp, int l, int r) { z "$d5XR
int i, j, k; !Fg4Au
int mid = (l + r) / 2; EQOP?>mWx!
if (l == r) p't:bR
return; 4FE@s0M,
if ((mid - l) >= THRESHOLD) >AX~c jo
mergeSort(data, temp, l, mid); ;(0$~O$3u
else AD%D ,l
insertSort(data, l, mid - l + 1); Dzjt|U0ru9
if ((r - mid) > THRESHOLD) \j})Kul
mergeSort(data, temp, mid + 1, r); -@V"i~g<e
else FO>(QLlH
insertSort(data, mid + 1, r - mid); mS~ ]I$
UK_aqB
for (i = l; i <= mid; i++) { DcR}pQ(e
temp = data; .A!0.M|
} kxqc6
for (j = 1; j <= r - mid; j++) { r{2].31'
temp[r - j + 1] = data[j + mid]; ,ibPSN5Ca
} dJ%Rk#?;A
int a = temp[l]; +=~%S)9F
int b = temp[r]; oYh<k
for (i = l, j = r, k = l; k <= r; k++) { -S%q!%}u
if (a < b) { }wOpPN[4
data[k] = temp[i++]; fxoi<!|iGY
a = temp; 'uf\.F
} else { 'tu@`7*
data[k] = temp[j--]; !MJe+.
b = temp[j]; KA-/k@1&
} +5t bK
} lHKf#|
} 6%\Q*r*N
p;u 1{
/** ImV]}M~_
* @param data <ql w+RVt
* @param l %t~SOkx
* @param i mYh5#E41J
*/ '-PMF~~S
private void insertSort(int[] data, int start, int len) { Vp]D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "rx^M*"
} v"~Do+*+
} K4k~r!&OU
} M6jp1:ZH2q
} ![@T iM
45+%K@@x
堆排序： pFJQ7Jlx
! FR%QGn1
package org.rut.util.algorithm.support; 6mu<&m@
)W1(tEq59
import org.rut.util.algorithm.SortUtil; BU9J_rCIv
-!|WZ
/** :GQIlA8cF$
* @author treeroot hr[B^?6
* @since 2006-2-2 )W`SC mr]
* @version 1.0 ',JrY)
*/ HUJ|-)"dw
public class HeapSort implements SortUtil.Sort{ UK6xkra?#
{eEC:[
/* (non-Javadoc) Oz&+{ c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +:>JZ$
*/ +%Lt".o
public void sort(int[] data) { `s`C{|wv
MaxHeap h=new MaxHeap(); /}w#Jk4pD
h.init(data); y7JZKtsFA
for(int i=0;i h.remove(); G`,u40a
System.arraycopy(h.queue,1,data,0,data.length); 3$c(M99r
} ok`]:gf
T0`"kjE
private static class MaxHeap{ hhpv\1h#
kG)2%
void init(int[] data){ wqlcLIJPR
this.queue=new int[data.length+1]; IX<r5!
for(int i=0;i queue[++size]=data; ~^I\crx,U%
fixUp(size); jow7t\wk
} OGJ=VQA
} Y5ogi)
v<;: 0
private int size=0; hojHbmm4
|e*GzD
private int[] queue; OE'K5oIM
4E=0qbt8
public int get() { a-]hW=[
return queue[1]; K1T1@ j
} e(yQKwVD
60GFVF]'2
public void remove() { {~"7vkc+
SortUtil.swap(queue,1,size--); {r={#mO;p
fixDown(1); E@w[&#
} 'h-3V8m^e
file://fixdown J=UZ){c>:.
private void fixDown(int k) { d5DP^u
int j; $]@O/[
while ((j = k << 1) <= size) { x*.Ye5Jb
if (j < size %26amp;%26amp; queue[j] j++; Yd'H+r5b
if (queue[k]>queue[j]) file://不用交换 ajn-KG!A
break; }A{_L6qx
SortUtil.swap(queue,j,k); of9q"h
k = j; ~~PgF"v
} M@|w[ydQG
} J &!B|TS
private void fixUp(int k) { S|"Fgoj r
while (k > 1) { fNkuX-om
int j = k >> 1; C"6Amnj
if (queue[j]>queue[k]) L@w0N)P<!{
break; )`w=qCn1Y
SortUtil.swap(queue,j,k); Zta$R,[9h
k = j; I[#U`9Dt
} 9Z&?R++?
} /ZHO>LNN|
||uZ bP@
} h4f~5- Y
Oqpp=7
} Bi]D{m9
~}BJ0P(VMc
SortUtil： _=ugxL #eB
UL+E,=
package org.rut.util.algorithm; Bwjg#1E
$^t<9"t
import org.rut.util.algorithm.support.BubbleSort; y-'" >
import org.rut.util.algorithm.support.HeapSort; QwBXlO?
import org.rut.util.algorithm.support.ImprovedMergeSort; +p3 Z#KoC
import org.rut.util.algorithm.support.ImprovedQuickSort; )S^z+3p
import org.rut.util.algorithm.support.InsertSort; zK=dzoy
import org.rut.util.algorithm.support.MergeSort; ITONpg[f
import org.rut.util.algorithm.support.QuickSort; !g8*r"[UJ
import org.rut.util.algorithm.support.SelectionSort; huz86CO
import org.rut.util.algorithm.support.ShellSort; T?>E{1pS
PdT83vOCE
/** 5O&d3;p'
* @author treeroot [FGgkd}
* @since 2006-2-2 Y;} 2'"
* @version 1.0 yz?q(]
*/ @rF/]UJ
public class SortUtil { MEEAQd<*
public final static int INSERT = 1; RcQ>eZHl
public final static int BUBBLE = 2; E#8_hT]5
public final static int SELECTION = 3; gI)u}JX
public final static int SHELL = 4; + 3h`UF
public final static int QUICK = 5; "%VbI P
public final static int IMPROVED_QUICK = 6; V]rhVMA
public final static int MERGE = 7; < kz[:n:
public final static int IMPROVED_MERGE = 8; jo)6 %w]
public final static int HEAP = 9; i3\~Qj;1
H)E^!eo
public static void sort(int[] data) { IV0[!D
sort(data, IMPROVED_QUICK); W2`.RF^
} 7,*%[#-HE
private static String[] name={ >V(zJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |Ab{H%
}; P.cO6+jGR
H'EY)s Hi
private static Sort[] impl=new Sort[]{ ZRnL_z~
new InsertSort(), pYt/378w
new BubbleSort(), QQFf5^
new SelectionSort(), 3[r";Wt#
new ShellSort(), Z'Q*L?E8M
new QuickSort(), %*kLEA*v
new ImprovedQuickSort(), "}@i+oS
new MergeSort(), Lj8)'[K"
new ImprovedMergeSort(), n+HsQ]z.
new HeapSort() EWA;L?g|A
}; J*j5#V];
=h|wwQE
public static String toString(int algorithm){ K#!X><B'
return name[algorithm-1]; DR@1z9 a
} JS!*2*Wr
nLj&Uf&
public static void sort(int[] data, int algorithm) { @u/H8\.l
impl[algorithm-1].sort(data); dCeX}Z
} e0 u,zg+m
]9*;;4Mg
public static interface Sort { `XW*kxpm
public void sort(int[] data); KXf<$\+zO
} tiYOMA
WS:5MI,OL
public static void swap(int[] data, int i, int j) { W`rMtzL5
int temp = data; *"cD.)]#2
data = data[j]; o>F*Itr{
data[j] = temp; OQScW2a&
} Q`A6(y/s?
} @*(4dt:V