[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; 0hhxTOp
} Ab]tLz|Z
int i1=l; 2i0;b|-=
int i2=mid+1; !u'xdV+bf
for(int cur=l;cur<=r;cur++){ "F}dZ
if(i1==mid+1) z#Fel/L`O
data[cur]=temp[i2++]; q 'd]
else if(i2>r) ]ag{sU@#
data[cur]=temp[i1++]; MhR`
else if(temp[i1] data[cur]=temp[i1++]; s1E 0atT
else tfe]=_U
data[cur]=temp[i2++]; F3qCtx*N
} zrqI^i"c
} S]ayH$w\Q
z{|0W!nHJ
} =tbfBK+
P6Y+ u
改进后的归并排序: .^M#BAt2
R:+'"dBge
package org.rut.util.algorithm.support; Ge/K.]>i
D+v?zQw
import org.rut.util.algorithm.SortUtil; 8R%<~fq r
HAL\j5i
/** mI5J]hk
* @author treeroot *RxJ8.G
* @since 2006-2-2 1a/C(4_k
* @version 1.0 2Mk;r*FT
*/ 2F>Y{3&
public class ImprovedMergeSort implements SortUtil.Sort { [|ZFei)r
yuy\T(7BN
private static final int THRESHOLD = 10; \I:27:iAL
P JATRJ1.
/* _7\`xU
* (non-Javadoc) Y<|JhqOXK
* cE:s\hG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ufl\ uq3'H
*/ {ZrlbDQX
public void sort(int[] data) { I5q$QQK
int[] temp=new int[data.length]; >I0;MNX
mergeSort(data,temp,0,data.length-1); %VFoK-a
} .Sn{a}XP4
JH{/0x#+
private void mergeSort(int[] data, int[] temp, int l, int r) { "5L?RkFi\
int i, j, k; S9Oz5_x
int mid = (l + r) / 2; Dm{Xd+Y
if (l == r) o5p{ O>D[z
return; G"` }"T0}
if ((mid - l) >= THRESHOLD) -Uy)=]Zae
mergeSort(data, temp, l, mid); }3A~ek#*~
else y~\ujp_5w
insertSort(data, l, mid - l + 1); qF4tjza;k
if ((r - mid) > THRESHOLD) "d:rPJT)(@
mergeSort(data, temp, mid + 1, r); %-yzU/`JF
else ; ?f+
insertSort(data, mid + 1, r - mid); o S=!6h
pJvPEKN
for (i = l; i <= mid; i++) { o_`6oC"s
temp = data; ^7wqb'xg
} 6FNGyvBU
for (j = 1; j <= r - mid; j++) { 'x{oAtCP9
temp[r - j + 1] = data[j + mid]; `@ YV
} m=sEB8P
int a = temp[l]; ?[d4HKs
int b = temp[r]; jQ;/=9
for (i = l, j = r, k = l; k <= r; k++) { -'g>i
if (a < b) { w") G:K
data[k] = temp[i++]; )-_^vB
a = temp; ~;3#MAG
} else { IK\~0L;ozE
data[k] = temp[j--]; =X?fA,
b = temp[j]; U!o7Nw@z
} 7H)$NG<U$
} ,eBC]4)B6
} pe vXixl
aaig1#a@1b
/** u0Wt"d-=
* @param data <HoCt8>U
* @param l zI4rAsysL
* @param i o[cOL^Xd1
*/ La )M
private void insertSort(int[] data, int start, int len) { 9tJ0O5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #0r~/gW
} RbL?(
} ,Q56A#Y\
} r@3-vLI!u
} U}5fjY
=}#yi<Lt
堆排序： JY2<ECO
`jGeS[FhR
package org.rut.util.algorithm.support; F*[E28ia&
GMJ4v S
import org.rut.util.algorithm.SortUtil; EjLq&QR.
$KYGQP
/** WVRIq'
* @author treeroot >t3_]n1e
* @since 2006-2-2 VKl,m ;&N
* @version 1.0 6 X~><r
*/ ).;{'8Q
public class HeapSort implements SortUtil.Sort{ i"}z9Ae~.
]0."{^ksL
/* (non-Javadoc) uK@d?u!`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EL`|>/[J
*/ E%bhd4$G
public void sort(int[] data) { ).^d3Kp
MaxHeap h=new MaxHeap(); ]UkH}Pt'3
h.init(data); UE'=9{o`
for(int i=0;i h.remove(); ?9()ya-TE
System.arraycopy(h.queue,1,data,0,data.length); UON=7}=$&
} = g{I`u
%PYO9:n
private static class MaxHeap{ $_"u2"p
t`z"=S
void init(int[] data){ j**[[
this.queue=new int[data.length+1]; vHf)gi}O|
for(int i=0;i queue[++size]=data; =$J(]KPv!?
fixUp(size); 4CF;>b f~
} Ncz4LKzt
} #@B"E2F
\:4*h
private int size=0; ^[7Mp
+a!3*G@N+
private int[] queue; H ni^S
Lto*L X
public int get() { &#2&V>pE
return queue[1]; fB3Jp~$
} pq{`WgA^
@!P2f
public void remove() { W^[FWFUTY
SortUtil.swap(queue,1,size--); Y/5M)AyJt
fixDown(1); 6Cj7 =|L7
} Vx$;wU Y
file://fixdown %Xd*2q4*
private void fixDown(int k) { 'Tm1Mh0Fso
int j; ,GH`tK_
while ((j = k << 1) <= size) { n{;Q"\*Sg
if (j < size %26amp;%26amp; queue[j] j++; J#..xJ?XRD
if (queue[k]>queue[j]) file://不用交换 ;\*3A22 #
break; J,?#O#j
SortUtil.swap(queue,j,k); \EfX3ghPI
k = j; 49MEGl;K0\
} F"]P|
} ~(V\.hq
private void fixUp(int k) { G]>yk_#/\U
while (k > 1) { zL yI|%KH
int j = k >> 1; *&I>3;~%^}
if (queue[j]>queue[k]) Ljd`)+`D
break; |/gt;H~:
SortUtil.swap(queue,j,k); eB5>uKa
k = j; J{ju3jo
} 4f\NtQ)
} W'@|ob
bp?5GU&Uy
} X`D2w:
LU:xmDv
} ,R[$S"]!SH
UGPDwgq\v
SortUtil： Vu5?;|^:
:oIBJ u%/
package org.rut.util.algorithm; %)lp]Y33
3IMvtg
import org.rut.util.algorithm.support.BubbleSort; [ \_o_W
import org.rut.util.algorithm.support.HeapSort; L0wT:x*
import org.rut.util.algorithm.support.ImprovedMergeSort; ^o3,YH
import org.rut.util.algorithm.support.ImprovedQuickSort; eq6O6-
import org.rut.util.algorithm.support.InsertSort; DC8#b`j
import org.rut.util.algorithm.support.MergeSort; L0g+RohW
import org.rut.util.algorithm.support.QuickSort; [KK |_
import org.rut.util.algorithm.support.SelectionSort; zgAU5cw
import org.rut.util.algorithm.support.ShellSort; (GmBv
^j\LB23
/** }emUpju<C
* @author treeroot *9j'@2!M
* @since 2006-2-2 NpH8=H9
* @version 1.0 7S{qo&j'
*/ L"bJ#0m
public class SortUtil { -+WAaJ(b
public final static int INSERT = 1; {zb'Z Yz
public final static int BUBBLE = 2; cZh0\DyU
public final static int SELECTION = 3; .C^P6S2oJ
public final static int SHELL = 4; huC{SzXM
public final static int QUICK = 5; b&rBWp0#
public final static int IMPROVED_QUICK = 6; ps{4_V-3u
public final static int MERGE = 7; K}l3t2uk
public final static int IMPROVED_MERGE = 8; = 7y-o
public final static int HEAP = 9; yLC[-.H
|o5eG><
public static void sort(int[] data) { _N`.1Dl%Q
sort(data, IMPROVED_QUICK); ?Y~t{5NJR
} DhM=q
private static String[] name={ Z 8rD9 k$6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *I]]Ogpq=
}; ftYJ 3/WH
O*:87:I d
private static Sort[] impl=new Sort[]{ Wu][A\3D1
new InsertSort(), ztO)~uL
new BubbleSort(), U<j5s\Y,
new SelectionSort(), lCU clD
new ShellSort(), & &}_[{fc
new QuickSort(), 6(8F4[D
new ImprovedQuickSort(), SxRJ{m~
new MergeSort(), DsHF9Mn
new ImprovedMergeSort(), D]@(LbMG4
new HeapSort() b9j}QK
}; '##?PQ*u
A^OwT#
public static String toString(int algorithm){ c]9gf\WW
return name[algorithm-1]; Zy(i_B-b
} Q#p)?:o/
*wTX
public static void sort(int[] data, int algorithm) { W3.[d->X
impl[algorithm-1].sort(data); !K-1tp$
} $nE{%?n-#
=0cTct6\
public static interface Sort { OR@ 67Y
public void sort(int[] data); p'h'Cz
} _5p$#U`
R (f:UC
public static void swap(int[] data, int i, int j) { %ztZ#h~g
int temp = data; px;~20$e
data = data[j]; 1-gM)x{Jr
data[j] = temp; ]K(a32VCH
} ,j%\3g`
} QEJu.o