[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; 8bEii1EM
} Ria*+.k@"B
int i1=l; ]:]w+N%7
int i2=mid+1; <m?/yREK2
for(int cur=l;cur<=r;cur++){ QW@`4W0F
if(i1==mid+1) xOpCybmc
data[cur]=temp[i2++]; 1FEY&rpR
else if(i2>r) s\1c.
data[cur]=temp[i1++]; N^tH&\G\m
else if(temp[i1] data[cur]=temp[i1++]; a: OuDjFp
else h IUO=f
data[cur]=temp[i2++]; ^pa -2Ao6
} bcprhb
} o{ \r1<D
KA0_uty/T
} uQg&A`4
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改进后的归并排序: IY9##&c3>
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package org.rut.util.algorithm.support; 4^BHJOvs
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import org.rut.util.algorithm.SortUtil; wn{DY v7B
'St\$X
/** .3T#:Hl
* @author treeroot > 1&_-
* @since 2006-2-2 6m{1im=
* @version 1.0 =arrp:
*/ olf7L%
public class ImprovedMergeSort implements SortUtil.Sort { wTY8={p]
Z\M8DZW8Y
private static final int THRESHOLD = 10; 7q _.@J
DWRq \`P
/* l+8G6?@]>
* (non-Javadoc) !@-g9z
* KF`@o@,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zz+[]G+"2m
*/ "@)9$-g
public void sort(int[] data) { 3DO ^vV
int[] temp=new int[data.length]; Bl)DuCV
mergeSort(data,temp,0,data.length-1); }xM >F%
} p8MPn>h<
7vs>PV
private void mergeSort(int[] data, int[] temp, int l, int r) { U*6)/.J
int i, j, k; -gKo@I
int mid = (l + r) / 2; g>O O '}lF
if (l == r) o}K!p%5_
return; S+(-k0
if ((mid - l) >= THRESHOLD) Od:,r
mergeSort(data, temp, l, mid); #\fxU:z~r
else GE[J`?E]
insertSort(data, l, mid - l + 1); #!X4\+)
if ((r - mid) > THRESHOLD) }EZd=_kAq~
mergeSort(data, temp, mid + 1, r); 9nPc>O$
else ^.@BD4/RPt
insertSort(data, mid + 1, r - mid); hzjEO2
2aUy1*aM
for (i = l; i <= mid; i++) { !*C9NX
temp = data; <);Nc1
} $R[ggH&
for (j = 1; j <= r - mid; j++) { AR-&c 3o
temp[r - j + 1] = data[j + mid]; Xy(o0/7F9
} u`vOKajpH$
int a = temp[l]; 7R=cxD&
int b = temp[r]; -?$Hr\
for (i = l, j = r, k = l; k <= r; k++) { z!GLug*j`
if (a < b) { )N4_SA
data[k] = temp[i++]; _*O^|QbM
a = temp; +5+?)8Ls
} else { n^AQ!wC
data[k] = temp[j--]; 5L}qL?S`x|
b = temp[j]; zLxO\R!d
} "NamP\hj
} hkq[xgX
} ZsPT!l,
=i/7&gC
/** uxd5XS
* @param data 5xawa:K
* @param l (ft8,^=4
* @param i >wpC45n)9N
*/ X^U)j N2
private void insertSort(int[] data, int start, int len) { j[fVF3v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QM }TPE
} b!R\u1b
} U h'1f7%
} 5@6%/='I q
} Wm/0Y'$r&k
*L3>:],7
堆排序： bI,gNVN=
B9RB/vHH
package org.rut.util.algorithm.support; ;U=RV&
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import org.rut.util.algorithm.SortUtil; !Rzw[~
Tc DkKa
/** 8_S<zE`Ha
* @author treeroot 0OndSa,
* @since 2006-2-2 <4{,u1!t
* @version 1.0 p<2A4="&
*/ t@TBx=16
public class HeapSort implements SortUtil.Sort{ '@ym-\,
w7?&eF(w(
/* (non-Javadoc) &ESE?{of)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]iyJ>fC
*/ ESl-k2
public void sort(int[] data) { u2SnL$A7
MaxHeap h=new MaxHeap(); v^a. b
h.init(data); gm63dE>
for(int i=0;i h.remove(); Q}a 1P8?S
System.arraycopy(h.queue,1,data,0,data.length); 5m`@ 4%)zp
} WdGjvs
]F5qXF5
private static class MaxHeap{ 5{Xld,zw
J3oj}M*
void init(int[] data){ DL5`A?/
this.queue=new int[data.length+1]; 9nFPGIz+
for(int i=0;i queue[++size]=data; Z)6gh{B08
fixUp(size); s!Xj'H7K
} J?WT
} Z^w}: {
!}D!_z,)u
private int size=0; GB1[`U%
uM\(#jZ
private int[] queue; m/)Wn
pv.0!a/M
public int get() { =gCv`SFW
return queue[1]; bY4~\cP.
} 3d^zLL
2Rc'1sCth-
public void remove() { xD}ha
SortUtil.swap(queue,1,size--); =y; tOdj
fixDown(1); W_NQi
} )SMS<J
file://fixdown %t&5o>1C
private void fixDown(int k) { AR i_m
int j; fA!uSqR$V
while ((j = k << 1) <= size) { .u3!%{/v(c
if (j < size %26amp;%26amp; queue[j] j++; wz-9+VN6
if (queue[k]>queue[j]) file://不用交换 0f).F
break; $= '_$wG 8
SortUtil.swap(queue,j,k); KJ]:0'T
k = j; N#-P}\Q9
} ;?>xuC$
} +1j@n.)ft
private void fixUp(int k) { [-)N}rL>
while (k > 1) { (Yz EsY
int j = k >> 1; _cqBp7
if (queue[j]>queue[k]) 1us-ootsjP
break; yIBT*,4
SortUtil.swap(queue,j,k); c}a.
k = j; *Z! #6(G
} 'k=GSb
} A2{u("^[6
=@U~sl[
} sgdxr!1?y
b[<zT[.:
} DGl_SMJb
4^T@n$2N
SortUtil： S) /(~
TFbMrIF
package org.rut.util.algorithm; <StyO[
G992{B
import org.rut.util.algorithm.support.BubbleSort; !/W[6'M#p
import org.rut.util.algorithm.support.HeapSort; *ip2|2G$
import org.rut.util.algorithm.support.ImprovedMergeSort; 8=rD'*
import org.rut.util.algorithm.support.ImprovedQuickSort; e_Na_l]
import org.rut.util.algorithm.support.InsertSort; 3 8>?Z]V
import org.rut.util.algorithm.support.MergeSort; X/
import org.rut.util.algorithm.support.QuickSort; YGP.LR7
import org.rut.util.algorithm.support.SelectionSort; TAbd[:2{F
import org.rut.util.algorithm.support.ShellSort; CeD O:J=,
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/** ) -+u8#
* @author treeroot !424K-nW
* @since 2006-2-2 ^nu~q+:+#
* @version 1.0 \|\Dc0p}
*/ -POV#1s
public class SortUtil { |^K-m42
public final static int INSERT = 1; 0xbx2jlkY
public final static int BUBBLE = 2; L~_3BX
public final static int SELECTION = 3; b4GD}kR
public final static int SHELL = 4; %xtTh]s
public final static int QUICK = 5; a?bSMt}
public final static int IMPROVED_QUICK = 6; }W{rDc kv
public final static int MERGE = 7; $2Y'[Dto\
public final static int IMPROVED_MERGE = 8; ^z#'o
public final static int HEAP = 9; p._BG80
V!#+Ti/w4
public static void sort(int[] data) { :<ye:P1s
sort(data, IMPROVED_QUICK); %|L+~=
} B#RwW,
private static String[] name={ j(4BMk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rQ -pD
}; 0 1U/{D6D
^&oa\7<'
private static Sort[] impl=new Sort[]{ 5gnNgt~
new InsertSort(), 8)IpQG
new BubbleSort(), Z?k4Kb
new SelectionSort(), H!Gsu$C
new ShellSort(), +uMOT#KjR
new QuickSort(), pPt7M'uL"
new ImprovedQuickSort(), %n-:mSus
new MergeSort(), ]-d:wEj
new ImprovedMergeSort(), ?N2/;u>
new HeapSort() %~uMa
}; n82N@z<8]
+yX\!H"
public static String toString(int algorithm){ fHTqLYd-
return name[algorithm-1]; 9%e&Z'l
} >S4klW=*I
pI2g\cH>
public static void sort(int[] data, int algorithm) { LaL.C^K
impl[algorithm-1].sort(data); o7"2"( =>
} mJT<
+g8wc(<ik
public static interface Sort { HMyw:?
public void sort(int[] data); ?;!d5Xuu
} UELni,$
OQ&?^S`8',
public static void swap(int[] data, int i, int j) { \ .HX7v
int temp = data; <k)@PAV
data = data[j]; //63?s+
data[j] = temp; 1:]iV}OFqR
} ^R.kThG
} rYUhGmg`