[JAVA]用Java实现的各种排序

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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; F#hM S<
} wBf bpoE7
int i1=l; b$BUo8O}
int i2=mid+1; cWi2Sls
for(int cur=l;cur<=r;cur++){ ;-3M
if(i1==mid+1) `JC!uc
data[cur]=temp[i2++]; FUQT,7CA
else if(i2>r) ,i}"e(f
data[cur]=temp[i1++]; V1+IqOXAIp
else if(temp[i1] data[cur]=temp[i1++]; +1rJ;G
else '{|87kI
data[cur]=temp[i2++]; =y<Fz*aA
} .p&M@h w
} `f(!i mN
87-oR}/r
} (wTg aV1
up`6IWlLE
改进后的归并排序: pG (8VteH
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package org.rut.util.algorithm.support; giPyo"SD
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import org.rut.util.algorithm.SortUtil; ^t| %!r G
</fzBaTo
/** WA<~M)rb
* @author treeroot =[P||
* @since 2006-2-2 I?1^\s#L
* @version 1.0 g}f@8;TY
*/ Q<M>+U;t
public class ImprovedMergeSort implements SortUtil.Sort { <fP|<>s$@1
(|WqOwmoUt
private static final int THRESHOLD = 10; //`X+[bMG
vnKUD|
/* dfNNCPu]+
* (non-Javadoc) 1PWDK1GI8
* B${Q Y)t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >BiJ/[9
*/ P:Bg()
public void sort(int[] data) { VH8,!#Q;
int[] temp=new int[data.length]; |'Jz(dv[
mergeSort(data,temp,0,data.length-1); |kjk{
} }^=J]
#zfBNkk&@
private void mergeSort(int[] data, int[] temp, int l, int r) { m~2PpO
int i, j, k; ,Q^.SHP8
int mid = (l + r) / 2; -&+[/
if (l == r) ?(E$|A
return; fi1tF/`
if ((mid - l) >= THRESHOLD) -(Yq$5Zc&
mergeSort(data, temp, l, mid); 1;>J9
else t1D6#JP(a
insertSort(data, l, mid - l + 1); b8Y-!]F
if ((r - mid) > THRESHOLD) 6z~6o0s~
mergeSort(data, temp, mid + 1, r); P#iBwmwN+.
else X'O3)Yg
insertSort(data, mid + 1, r - mid); ?v6xaVg:
orJN#0v4
for (i = l; i <= mid; i++) { tX)^$3A
temp = data; : xW.(^(d
} L,BuzU[1S
for (j = 1; j <= r - mid; j++) { ,|D<De\v&
temp[r - j + 1] = data[j + mid]; "1Vuf<?C
} ]5wc8Kh"
int a = temp[l]; Oo$i,|$$
int b = temp[r]; af.yC[
for (i = l, j = r, k = l; k <= r; k++) { :W^ k3/t
if (a < b) { 4/cUd=>Z
data[k] = temp[i++]; /alJN`g
a = temp; z]K:Amp;Z
} else { NsPt1_Y8
data[k] = temp[j--]; 4 1q|R[js!
b = temp[j]; h<JV6h:8
} O,u$L
} @w?hXK=
} M$ CnaH
]sB-}n)
/** D&#wn.0|E
* @param data 0sIwU!=vm
* @param l 'a[|'
* @param i O!#r2Y"?K1
*/ =)!sWY:
private void insertSort(int[] data, int start, int len) { "dQ02y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r1ao=N
} ?cF`T/z]"
} o!bV;]
} EZypqe):/C
} E+)3n[G
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堆排序： 3RJsH:u8
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package org.rut.util.algorithm.support; hv (>9N
^ZuwUuuf
import org.rut.util.algorithm.SortUtil; "n'kv!?\
Lh\ 1L
/** juIi-*R!
* @author treeroot _Oc5g5_{
* @since 2006-2-2 fRh}n ^X
* @version 1.0 mBN+c9n/
*/ =Z}$X: $
public class HeapSort implements SortUtil.Sort{ P.aN4 9`=
F#=M$j_
/* (non-Javadoc) 4 ))ZBq?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [0MNq]gxf
*/ e|> 5 R
public void sort(int[] data) { _xY dnTEl
MaxHeap h=new MaxHeap(); z>lIZ}
h.init(data); Nk2n&(~$
for(int i=0;i h.remove(); Y<qWG8X
System.arraycopy(h.queue,1,data,0,data.length); ]"ou?ot }
} [8jIu&tJf
[eLMb)n
private static class MaxHeap{ TAB'oLNp
!{q_Q !
void init(int[] data){ \~X:ffb =
this.queue=new int[data.length+1]; y7^E`LKK
for(int i=0;i queue[++size]=data; uo9FLm
fixUp(size); +9exap27
} Lo,uH`qU
} L%;fYi;n
2:oAS
private int size=0; g286 P_a`*
o4U0kiI@
private int[] queue; OMfw#
F/ o }5H
public int get() { I >aKa
return queue[1]; w~4T.l#1
} (1e,9!?
vN&(__3((
public void remove() { [[#zB-|
SortUtil.swap(queue,1,size--); y**YFQ*sc
fixDown(1); R =kXf/y
} BEtFFi6ot
file://fixdown FQBE1h@k0u
private void fixDown(int k) { smKp3_r
int j; ,n{R,]y\
while ((j = k << 1) <= size) { J4%"38l
if (j < size %26amp;%26amp; queue[j] j++; J\Db8O-/x4
if (queue[k]>queue[j]) file://不用交换 RiG]-K:
break; G5hf m-
SortUtil.swap(queue,j,k); &$bcB]C\3
k = j; LNcoTdv}k
} wEZieHw
} "m>BE
private void fixUp(int k) { cs9"0&JX
while (k > 1) { CC)Mws+2
int j = k >> 1; 3S .2
if (queue[j]>queue[k]) {b|V;/
break; yMEI^,0"
SortUtil.swap(queue,j,k); !t[;~`d9
k = j; 40aD\S>
} r:M0# 2
} r{{5@
Rrrq>{D
} D+u\ORj
wbB\~*Z)
} >9y!M'V
YJ+l \Wb}
SortUtil： =gC% =
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package org.rut.util.algorithm; ~l('ly
Ej $.x6:
import org.rut.util.algorithm.support.BubbleSort; YZAQt*x
import org.rut.util.algorithm.support.HeapSort; tr58J%Mu
import org.rut.util.algorithm.support.ImprovedMergeSort; J| 1!4R~
import org.rut.util.algorithm.support.ImprovedQuickSort; \E6 0
import org.rut.util.algorithm.support.InsertSort; Y4+iNdd
import org.rut.util.algorithm.support.MergeSort; OepQ Z|2
import org.rut.util.algorithm.support.QuickSort; "pO**z$Z
import org.rut.util.algorithm.support.SelectionSort; e5D\m g)
import org.rut.util.algorithm.support.ShellSort; Bjh8uW G
8@ S@^C*F
/** %XQJ!sC`
* @author treeroot ~R\ $Z
* @since 2006-2-2 9rIv-&7'm
* @version 1.0 H6Ytp^~>
*/ N;DE,[:<
public class SortUtil { a^Z=xlJ/uZ
public final static int INSERT = 1; 1+[,eq
public final static int BUBBLE = 2; OnyAM{$g
public final static int SELECTION = 3; /z(d!0_q|v
public final static int SHELL = 4; !?sB=qo
public final static int QUICK = 5; ,kUg"\_k
public final static int IMPROVED_QUICK = 6; <nK@+4EH"o
public final static int MERGE = 7; VtMnLFMw
public final static int IMPROVED_MERGE = 8; R2Lq??XA=
public final static int HEAP = 9; aWNjl
b~{nS,_Rn
public static void sort(int[] data) { 6\Tq,I7
sort(data, IMPROVED_QUICK); P F);KQ
} *q;83\
private static String[] name={ \mZB*k)+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w4R~0jXy
}; fl40jo]
i ~)V>x
private static Sort[] impl=new Sort[]{ Bc`L]<
new InsertSort(), DHbS=Iih
new BubbleSort(), ;2[OI
new SelectionSort(), 'Hgk$Im+
new ShellSort(), =BbXSwv'(
new QuickSort(), :H#D4O8UiH
new ImprovedQuickSort(), $GOF'
new MergeSort(), 9?^0pR p
new ImprovedMergeSort(), 1(Z+n,Hh
new HeapSort() F6\4[B
}; $@w,9J\
=$T[
public static String toString(int algorithm){ ?0-3J )kW
return name[algorithm-1]; -=n!k^?lK
} Fu% n8
-S&d5(R
public static void sort(int[] data, int algorithm) { Xc&J.Tw#4*
impl[algorithm-1].sort(data); Ir(U7D
} O&#>i]*V
I0;gTpt9
public static interface Sort { =L;g:hc<
public void sort(int[] data); rl2(DA{
} k^#*x2b
$7-S\sDr
public static void swap(int[] data, int i, int j) { "Y"`'U=v
int temp = data; p^Z|$aZZ
data = data[j]; QyrB"_dm
data[j] = temp; di]CYLf
} ]ki) (Bb
} k4en/&