[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; [S?`OF12
} Og?P5&C"9D
int i1=l; `Wp y6o
int i2=mid+1; Nl9}*3r
for(int cur=l;cur<=r;cur++){ +q] kpkG!
if(i1==mid+1) U|v@v@IBA
data[cur]=temp[i2++]; z;\,Dt
else if(i2>r) Aq_?8Cd
data[cur]=temp[i1++]; D{M&>.
else if(temp[i1] data[cur]=temp[i1++]; (VBO1f
else xOKf|
data[cur]=temp[i2++]; Xvxj-\ -
} GP_%.fO\M
} ;9hS_%ldX4
__[bKd.
} _m3#g1m{
% E8s>D
改进后的归并排序: V@\A<q%jTs
e%^PVi
package org.rut.util.algorithm.support; _7,4C?
ltOsl-OpR
import org.rut.util.algorithm.SortUtil; G<`6S5J>hr
2bxW`.fa
/** a~F\2`Q
* @author treeroot XRXQ 7\n
* @since 2006-2-2 (*Q8!"D^6
* @version 1.0 a 9Kws[
*/ ~>S? m;
public class ImprovedMergeSort implements SortUtil.Sort { Z=^~]Mfa
r(I&`kF<
private static final int THRESHOLD = 10; q=;U(,Y
`]5t'Ps
/* 6d;RtCENo
* (non-Javadoc) '@WS7`@-y
* Je=k.pO1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _p0G8
*/ 3mT6HGSKR
public void sort(int[] data) { L+.-aB2!d
int[] temp=new int[data.length]; UGQHwz
mergeSort(data,temp,0,data.length-1); `ex>q
} DxxY<OkN
3Cg0^~?6-
private void mergeSort(int[] data, int[] temp, int l, int r) { _o{w<b&
int i, j, k; rM)#}eZK!
int mid = (l + r) / 2; j "e]Ui
if (l == r) JF(&+\i<p
return; B }
if ((mid - l) >= THRESHOLD) =A<a9@N}N
mergeSort(data, temp, l, mid); DVw 04ay%
else =|IY[2^
insertSort(data, l, mid - l + 1); 4Vv$bbu+
if ((r - mid) > THRESHOLD) W4]jx]
mergeSort(data, temp, mid + 1, r); g.COKA
else b21@iW
insertSort(data, mid + 1, r - mid); iV.j!H7o
'J_6SD
for (i = l; i <= mid; i++) { :F pt>g
temp = data; [wM]w
} +%)bd
for (j = 1; j <= r - mid; j++) { >44,Dp]
temp[r - j + 1] = data[j + mid]; 8WLBq-]G
} 3W55m@w
int a = temp[l]; a+P^?N
int b = temp[r]; O{wt0 \P
for (i = l, j = r, k = l; k <= r; k++) { 'h`)6{
if (a < b) { H+ 7Fw'u
data[k] = temp[i++]; YeVkX{y
a = temp; gS.,V!#t
} else { ? ;$f"Wl
data[k] = temp[j--]; 73kI%nNB
b = temp[j]; rl:D>t(:.
} eI=:z/pd
} R|-!5J4h
} A(ZtA[G
;oVFcZSA
/** @'JA3V}
* @param data >5j&Q#Bu
* @param l yu$xQ~ o
* @param i B\6%.R
*/ DB.)/(zWQ
private void insertSort(int[] data, int start, int len) { ~iU@ns|g\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d5qGTT ~a
} ?d@zTAI
} ""x>-j4
} 6:AZZF1
} O.$OLK;v
y1kI^B
堆排序： <4jqF 4 W
W|V9:A
package org.rut.util.algorithm.support; h]p$r`i7
4/Xu,pT
import org.rut.util.algorithm.SortUtil; `0Xs!f
]ujXPK=t
/** NJPp6RZ%
* @author treeroot 58gkE94
* @since 2006-2-2 YI+o:fGC5
* @version 1.0 J6g:.jsK!
*/ ]TSzT"_r~~
public class HeapSort implements SortUtil.Sort{ #P;vc{ Iq
@8U8>'zDE
/* (non-Javadoc) F 8 gw3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nD#uOep9
*/ _TjRvILC
public void sort(int[] data) { "~6IjW*/
MaxHeap h=new MaxHeap(); RBV*e9P%
h.init(data); I4MZJAYk
for(int i=0;i h.remove(); !'8jy_<9
System.arraycopy(h.queue,1,data,0,data.length); Z>J3DH
} 8eD/9PD=F
s1 (UOd7}
private static class MaxHeap{ -[xbGSj{
)*Rr5l /l
void init(int[] data){ ivJTE
this.queue=new int[data.length+1]; VMJK9|JC[
for(int i=0;i queue[++size]=data; ~A,(D-
fixUp(size); GLa_[9 "
} KKM!($A
} +p0Y*.
W>J1JaO
private int size=0; osI0m7ws:
QHw{@*
private int[] queue; bipA{VU
|jyD@Q,4
public int get() { xH{V.n&v
return queue[1]; 7!^Zsp^+
} KBwY _
#s|,oIm
public void remove() { RKwuvVI
SortUtil.swap(queue,1,size--); e/F+Tf
fixDown(1); zd?uMq;w
} Jek3K&
file://fixdown |#x]/AXa0/
private void fixDown(int k) { # &Z1d(!
int j; c{wob%!>
while ((j = k << 1) <= size) { %DuSco"
if (j < size %26amp;%26amp; queue[j] j++; ky@DH(^>
if (queue[k]>queue[j]) file://不用交换 `a]feAl
break; CAbT9Wz&
SortUtil.swap(queue,j,k); Pt?d+aBtV
k = j; $QJ,V~
} 4\(|V fy
} \vp^[,SI
private void fixUp(int k) { dyuT-.2
while (k > 1) { #E@X'jwu
int j = k >> 1; 1-?TjR
if (queue[j]>queue[k]) 0{sYD*gK]
break; >3)AO04=;
SortUtil.swap(queue,j,k); d2tJ=.DI
k = j; q.v_?X<_
} ?tf<AZ=+^L
} |eH*Q%M
tz_WxOQ0
} 9~yp=JOV@
a\Dw*h?b~
} I_On0@%T5b
bh UghHT
SortUtil： ;#S4$wISw`
!E9A=u{
package org.rut.util.algorithm; LGPg\g`
1eMaKT_=
import org.rut.util.algorithm.support.BubbleSort; !k=~a]
import org.rut.util.algorithm.support.HeapSort; -ZBSkyMGy
import org.rut.util.algorithm.support.ImprovedMergeSort; WZ^u%Z
import org.rut.util.algorithm.support.ImprovedQuickSort; +3k#M[Bn}
import org.rut.util.algorithm.support.InsertSort; f%c-
import org.rut.util.algorithm.support.MergeSort; "Sd2VSLg
import org.rut.util.algorithm.support.QuickSort; 4Q^i"jT
import org.rut.util.algorithm.support.SelectionSort; <77v8=as5
import org.rut.util.algorithm.support.ShellSort; ,=y8[(h
m'5rzZP
/** <R8!fc{`
* @author treeroot lBfG#\rdW~
* @since 2006-2-2 J]qx4c
* @version 1.0 hdurT
*/ ~A-VgBbU>_
public class SortUtil { ~+Ows
public final static int INSERT = 1; x).`nZ1
public final static int BUBBLE = 2; bTc'E#
public final static int SELECTION = 3; ,[)f-FmcU
public final static int SHELL = 4; uqK[p^{
public final static int QUICK = 5; [C(>e0r
public final static int IMPROVED_QUICK = 6; r+;AEN48
public final static int MERGE = 7; JsbH'l
public final static int IMPROVED_MERGE = 8; t$5)6zG
public final static int HEAP = 9; D8wZC'7
I>45xVA
public static void sort(int[] data) { q?Av5TFf
sort(data, IMPROVED_QUICK); 'tun;Y
} Ub<^;Du5
private static String[] name={ <!I^xo[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dJUI.!hv;
}; `&qeSEs\
?\Lf=[
private static Sort[] impl=new Sort[]{ c9axzg UA
new InsertSort(), n]J;BW&Av
new BubbleSort(), 7wwlZ;w
new SelectionSort(), !-Md+I_
new ShellSort(), `#>JRQ=
new QuickSort(), 4@*`V
new ImprovedQuickSort(), 9$e6?<`(Y
new MergeSort(), @-5V~itW
new ImprovedMergeSort(), - u'5xn7
new HeapSort() L$s;tJ
}; h|Udw3N1L
&Un^ _M
public static String toString(int algorithm){ Pqb])-M9p
return name[algorithm-1]; ]>k>Z#8E*
} 7="I;
J-+p]xG
public static void sort(int[] data, int algorithm) { /d]{ #,k
impl[algorithm-1].sort(data); `=rDB7!$yL
} !Zma\Ip
TrmU
public static interface Sort { wNhtw'E8
public void sort(int[] data); zHW}A `Rz
} ,.PmH.zjmR
?ZlN$h^
public static void swap(int[] data, int i, int j) { CAV Q[r5y
int temp = data; *"K7<S[
data = data[j]; 'Z ,T,zW
data[j] = temp; JBvP {5
} )6,Pmq~)
} Ncle8=8