[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; HLM;EZ
} _/ct=
int i1=l; pFEZDf}:
int i2=mid+1; )tScc*=8
for(int cur=l;cur<=r;cur++){ ' *}^@[&
if(i1==mid+1) -.^3;-[
data[cur]=temp[i2++]; ):^ '/e
else if(i2>r) Ny.*G@&
data[cur]=temp[i1++]; _yNT=#/
else if(temp[i1] data[cur]=temp[i1++]; fEB195#@9
else l 4!kxXf-<
data[cur]=temp[i2++]; [7'#~[a~
} @81-kdTx
} |PI)A`
{x7=;-
} qw5&Y$((
E2kW=6VO>|
改进后的归并排序: ;*W=c
TeKC} NW
package org.rut.util.algorithm.support; &{ DR6
1;aF5~&
import org.rut.util.algorithm.SortUtil; ;i.I&*t
l<W*/}3
/** lxo.,n)
* @author treeroot .\Ul!&y
* @since 2006-2-2 c6t2Q6zV
* @version 1.0 >6OCKl
*/ MF&3e#mdB
public class ImprovedMergeSort implements SortUtil.Sort { >_-!zjO8u
``+c`F?5
private static final int THRESHOLD = 10; NvUu.
ud yAP>
/* : #3OcD4
* (non-Javadoc) ~B<97x(X
* 09G9nu;&{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XO0>t{G
*/ c[&d @
public void sort(int[] data) { V_Xy2<V
int[] temp=new int[data.length]; oDz*~{BHg
mergeSort(data,temp,0,data.length-1); =x=1uXQv5
} nrF%wH/5
T_uNF8Bh
private void mergeSort(int[] data, int[] temp, int l, int r) { ri#,ec|J
int i, j, k; a_Z.J3
int mid = (l + r) / 2; tvTWZ`
if (l == r) y*}AX%8`e~
return; O|?Z~
if ((mid - l) >= THRESHOLD) ?E%U|(S)=L
mergeSort(data, temp, l, mid); &aY/eD
else 5woIGO3X
insertSort(data, l, mid - l + 1); ?hxK/%)
if ((r - mid) > THRESHOLD) TG4\%S$w
mergeSort(data, temp, mid + 1, r); YfTd
else ~^^!"-
insertSort(data, mid + 1, r - mid); Rl y jOf{0
l?})_1v,R
for (i = l; i <= mid; i++) { |.y>[+Qb*
temp = data; `oB'(
} b;Hm\aK
for (j = 1; j <= r - mid; j++) { :/>7$)+
temp[r - j + 1] = data[j + mid]; >BJ2v=RA
} |)28=Z|Z
int a = temp[l]; }Vs~RJM)}
int b = temp[r]; \k|_&hG
for (i = l, j = r, k = l; k <= r; k++) { yQ<6p3
if (a < b) { Bh\ [CY
data[k] = temp[i++]; g!p+rq_f
a = temp; sVE>=0TVP
} else { Tq9,c#}&
data[k] = temp[j--]; #x, ]D
b = temp[j]; 2ZU@>W
} _u#/u2<
} Qe7"Z
} <dq,y>
$/4Wod*l
/** h |s*i
* @param data R'vdk<
* @param l 0\V\qAk
* @param i DfAiL(
*/ oN.Mra]D
private void insertSort(int[] data, int start, int len) { %2^['8t#NH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Bx\#`Y
} }W- K
} CHQ{+?#
} \7|s$ XQ\
} 7'-)/Pk
Iu)L3_+
堆排序： 9c"0~7v
c80 }1
package org.rut.util.algorithm.support; zzulVj*
EZ:I$X
import org.rut.util.algorithm.SortUtil; $ 1akI
zb@L)%
/** RH<@c^ S
* @author treeroot j)6@q@P/
* @since 2006-2-2 6b-
* @version 1.0 ^?H\*N4
*/ 9`ri J4zl
public class HeapSort implements SortUtil.Sort{ sL!;hKK
Nb#H@zm
/* (non-Javadoc) {Uik|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,$hQ(yF
*/ P Xyyyir{
public void sort(int[] data) { bl(BA}<
MaxHeap h=new MaxHeap(); hXV4$Dai
h.init(data); /V#MLPA
for(int i=0;i h.remove(); 5A0KV7N5
System.arraycopy(h.queue,1,data,0,data.length); nG&w0de<>
} T+&x{+gZ
h1Ke$#$6
private static class MaxHeap{ I T*fjUY&
N&R '$w
void init(int[] data){ U92B+up-
this.queue=new int[data.length+1]; f9h:"Dnzin
for(int i=0;i queue[++size]=data; OlD7-c2L]
fixUp(size); Ktg&G<%J0
} 5*G8W\ $
} Y;a6:>D%cT
J,dG4.ht
private int size=0; }M"-5K}
>i><s>=I`
private int[] queue; ANA2S*r
J8qu]{0I"
public int get() { >m)2ox_B
return queue[1]; Y-}hNZn"{
} kw*Cr/'*
'^P*F9
public void remove() { R7\{w(`K
SortUtil.swap(queue,1,size--); :ofE8]
fixDown(1); ?X8K$g
} lB5[#z
file://fixdown %xH>0
private void fixDown(int k) { +1JZB*W
int j; =$:4v`W0(
while ((j = k << 1) <= size) { Y\\3g_YBF
if (j < size %26amp;%26amp; queue[j] j++; b&U5VA0=1
if (queue[k]>queue[j]) file://不用交换 [*mCa:^
break; rsIt~w
SortUtil.swap(queue,j,k); "K4X:|Om"
k = j; S2{ ?W
} BDB zc5Q(
} K8Kz
private void fixUp(int k) { 2i4Dal
while (k > 1) { K'{wncumQ
int j = k >> 1; MJ*oeI!.=
if (queue[j]>queue[k]) .@x"JI>;
break; 'vf,T4uQ"
SortUtil.swap(queue,j,k); ,M+h9_&0?
k = j; S7\|/h:4
} nU">> 1!U
} d-A%ZAkE]
AW{/k'%xw
} `Tm8TZd66
tyGnG0GK
} ^{6UAT~!R
l*m]2"n]
SortUtil： ~gzpX,{n
hj#+8=
package org.rut.util.algorithm; H)?" 8 s
]0/~6f
import org.rut.util.algorithm.support.BubbleSort; +Qb2LR
import org.rut.util.algorithm.support.HeapSort; \fQgiX
import org.rut.util.algorithm.support.ImprovedMergeSort; 1W6n[Xg
import org.rut.util.algorithm.support.ImprovedQuickSort; &Hp\("
import org.rut.util.algorithm.support.InsertSort; 7W>}7
import org.rut.util.algorithm.support.MergeSort; a3E*%G
import org.rut.util.algorithm.support.QuickSort; J&] XLr.j
import org.rut.util.algorithm.support.SelectionSort; ['9OGV\
import org.rut.util.algorithm.support.ShellSort; iz,q8}/(
ZRVF{D??"%
/** -*]9Ma<wa
* @author treeroot se*pkgWbz
* @since 2006-2-2 'Rar>oU
* @version 1.0 H'0J1\ h
*/ 01SFOPuR%(
public class SortUtil { ;jY'z5PH5
public final static int INSERT = 1; DrVbx
public final static int BUBBLE = 2; F4aJr%!\6S
public final static int SELECTION = 3; Zj /H3,7
public final static int SHELL = 4; y(p:)Iv
public final static int QUICK = 5; "b+3 &i|
public final static int IMPROVED_QUICK = 6; ud~VQXZo
public final static int MERGE = 7; BYA=M*f
public final static int IMPROVED_MERGE = 8; ;R- z3C
public final static int HEAP = 9; 1<Ztk;$A
[]]LyWk
public static void sort(int[] data) { hzf}_1
sort(data, IMPROVED_QUICK); , K"2tb
} c9_4ohB
private static String[] name={ d+$[EDix
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ph$&f0A6Xc
}; oVj A$|
tIp\MXkTQ&
private static Sort[] impl=new Sort[]{ h19.b:JT
new InsertSort(), ",,qFM!
new BubbleSort(), B#/~U`t*
new SelectionSort(), &hM,b!R|
new ShellSort(), V'|g
new QuickSort(), V[2<ha[n>
new ImprovedQuickSort(), 14)kKWG
new MergeSort(), <pa];k(IQL
new ImprovedMergeSort(), *^$N$t/2
new HeapSort() e715)_HD
}; 66y,{t
f~(^|~ZT
public static String toString(int algorithm){ !nD[hI8P
return name[algorithm-1]; TY{?4
} $@ #G+QQ_
u[% J#S
public static void sort(int[] data, int algorithm) { ?[|4QzR
impl[algorithm-1].sort(data); MrygEC 5
} p44uozbK
c=c.p i"s
public static interface Sort { u+i/CE#w
public void sort(int[] data); #| e5
} K|' ]Hje\
qm&53
public static void swap(int[] data, int i, int j) { $EHn;~w T
int temp = data; Ns7l-mb
data = data[j]; J,2v~Dq
data[j] = temp; ',-X#u
} (fjXp75
} :\HN?_?{4