[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; w~$c= JO#
} kUg+I_j6*
int i1=l; lQdnL.w$.4
int i2=mid+1; =l8!VJa
for(int cur=l;cur<=r;cur++){ -4?xwz9o$7
if(i1==mid+1) fEj9R@u+h
data[cur]=temp[i2++]; JXL9Gge
else if(i2>r) lbB.*oQ
data[cur]=temp[i1++]; S?Bc~y
else if(temp[i1] data[cur]=temp[i1++]; ?{"XrQw
else $K?T=a;z
data[cur]=temp[i2++]; s~Lfi.
} 29Z!p2{hk
} [Y22Wi
nxyjL)!)0
} >lraYMc<rZ
` /I bWu
改进后的归并排序: h"u<E\g
VelB-vy&
package org.rut.util.algorithm.support; llHc=&y#
&0+x2e)7g
import org.rut.util.algorithm.SortUtil; X(GmiH /E
G{NSAaD[
/** <AI>8j6#B
* @author treeroot c$Xe.:QY
* @since 2006-2-2 ='dLsh4P2N
* @version 1.0 cc|CC Zl
*/ 3z,v#2
public class ImprovedMergeSort implements SortUtil.Sort { Pgn_9Y?<
%bIsrQ~B
private static final int THRESHOLD = 10; Kajkw>z
0).fBBNG
/* X,RT<GNNb
* (non-Javadoc) n}< ir!ZTO
* [1z{T(dh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SkiJpMN
*/ Qm.z@DwFM{
public void sort(int[] data) { 9?uqQ
int[] temp=new int[data.length]; e7@li<3>d
mergeSort(data,temp,0,data.length-1); r0F_;
} j\2]M
YF}9k
private void mergeSort(int[] data, int[] temp, int l, int r) { w$gSj/
int i, j, k; o"|O ]
int mid = (l + r) / 2; DpA\r_D
if (l == r) R{*_1cyW
return; UhsO\9}qH
if ((mid - l) >= THRESHOLD) bt;lq!g
mergeSort(data, temp, l, mid); p1Q/g Il
else ]{YN{
insertSort(data, l, mid - l + 1); R=`U4Ml;
if ((r - mid) > THRESHOLD) H}vn$$ O
mergeSort(data, temp, mid + 1, r); B ,V(LTE
else }dy9IH
insertSort(data, mid + 1, r - mid); "?$L'!bM@
\WWG>OUh.U
for (i = l; i <= mid; i++) { 6hZ.{8e0
temp = data; 7g-Dfg.w
} #`/bQ~s
for (j = 1; j <= r - mid; j++) { dIma{uv
temp[r - j + 1] = data[j + mid]; $h,d? .u6w
} y)P&]&"?
int a = temp[l]; w{3ycR
int b = temp[r]; 8Bq-0=E
for (i = l, j = r, k = l; k <= r; k++) { V]Sgx00;
if (a < b) { v' C@jsxM
data[k] = temp[i++]; 19'5Re&
a = temp; W/sY#"
} else { (}G!np
data[k] = temp[j--]; bV_j`:MD
b = temp[j]; &1P(O\d
} {t&*>ma6)
} YNI;h%w
} 6;gLwOeOHY
MZ WmlJ
/** xWDR726
* @param data xpAok]
* @param l ^ESUMXb
* @param i gSb,s [p&+
*/ 0Q7MM6
private void insertSort(int[] data, int start, int len) { Y17hOKc`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CI^[I\$&
} +>!V]S
} iUTU*El>
} T<P0T<
} Pubv$u2
zZ:xEc
堆排序： #ra*f~G
9mDnKW
package org.rut.util.algorithm.support; cAb>2]M5V
a$}NW.
import org.rut.util.algorithm.SortUtil; $Zxt&a
`]jqQr97
/** ;g+]klR!
* @author treeroot QjJfE<h
* @since 2006-2-2 w.z<60%},0
* @version 1.0 6Cv.5Vhx
*/ &))\2pl
public class HeapSort implements SortUtil.Sort{ ^&Q<tN7
B$?^wo
/* (non-Javadoc) ~>g+2]Bn>$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p?JQ[K7i
*/ Bd&`Xfebj
public void sort(int[] data) { {~'H
MaxHeap h=new MaxHeap(); '#q4Bc1
h.init(data); [1SMg$@<
for(int i=0;i h.remove(); 9 I{/zKq
System.arraycopy(h.queue,1,data,0,data.length); 2 x32U MD
} ;|HL+je;Z
E{%SR
private static class MaxHeap{ R%"K
Bd# TUy
void init(int[] data){ y3JMbl[S0
this.queue=new int[data.length+1]; Da_()e[9p
for(int i=0;i queue[++size]=data; C6]OAUXy:F
fixUp(size); -{{[cTI
} QIK 9
} Qnt5HSSt
e<"/'Ql!k
private int size=0; ^~1<f1(
Ee)xnY%(
private int[] queue; +qy6d7^
pO]8 dE0
public int get() { J# EP%
return queue[1]; tJ'iX>9I
} 0BK5qz
nB] Ia?
public void remove() { X{Zm9T
SortUtil.swap(queue,1,size--); %u!b& 5]e
fixDown(1); `q_<Im%I
} ^B]@Lr E^
file://fixdown bK*~ol
private void fixDown(int k) { =;ICa~`C;
int j; e;(
while ((j = k << 1) <= size) { ^$NJD
if (j < size %26amp;%26amp; queue[j] j++; rQr!R$t/[
if (queue[k]>queue[j]) file://不用交换 ?obm7<
break; ahGT4d`)9
SortUtil.swap(queue,j,k); 8ObeiVXf)
k = j; /X#z*GX
} ~x]9SXD%
} QJBr6
private void fixUp(int k) { ~ap2m
while (k > 1) { (kw5>c7
int j = k >> 1; {_>em*Vb
if (queue[j]>queue[k]) E=w3=\JP
break; Vw~\H Gs/~
SortUtil.swap(queue,j,k); wT_h!W
k = j; >*1}1~uU`'
} .F2:!h$
} +!yXTC
<<zI\+V
} A)NkT`<)
=RsXI&&vh
} 8@\7&C(g17
E6A/SVp
SortUtil： ~Xv=9@,h
',=g;
package org.rut.util.algorithm; ,6"l(]0
yVJ%+d:6
import org.rut.util.algorithm.support.BubbleSort; $xgBKD
import org.rut.util.algorithm.support.HeapSort; F- rQ3
import org.rut.util.algorithm.support.ImprovedMergeSort; PK2~fJB
import org.rut.util.algorithm.support.ImprovedQuickSort; 4. qtp`
import org.rut.util.algorithm.support.InsertSort; Wf26
import org.rut.util.algorithm.support.MergeSort; !8RwO%c(
import org.rut.util.algorithm.support.QuickSort; ,kM)7!]N
import org.rut.util.algorithm.support.SelectionSort; LKF/u` 0dP
import org.rut.util.algorithm.support.ShellSort; N#z~
l=m(mf?QBg
/** 04@cLDX8uB
* @author treeroot LIpEQ7;
* @since 2006-2-2 g@ith&*=h
* @version 1.0 L}k/9F.5
*/ ~mp0B9L%
public class SortUtil { uGP(R=H
public final static int INSERT = 1; 'MxSd(T =
public final static int BUBBLE = 2; iCQ>@P]nE
public final static int SELECTION = 3; G4-z3e,crr
public final static int SHELL = 4; NL"G2[e
public final static int QUICK = 5; #f,y&\Xmf
public final static int IMPROVED_QUICK = 6; ~$,qgf
public final static int MERGE = 7; 6,b"
public final static int IMPROVED_MERGE = 8; jLVl4h&
public final static int HEAP = 9; q6d~V]4:
K\?]$dK5
public static void sort(int[] data) { au@a8MP
sort(data, IMPROVED_QUICK); `ldz`yu6++
} % ZU/x d
private static String[] name={ y'C-[nk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Jf;?XP]z
}; hVpCB,
Yl cbW0'c
private static Sort[] impl=new Sort[]{ ~aK?cP
new InsertSort(), @* ust>7
new BubbleSort(), $4=f+ "z
new SelectionSort(), tOl e>]
new ShellSort(), NZLAk~R;0
new QuickSort(), io2)1cE&f
new ImprovedQuickSort(), \%jVg\4'
new MergeSort(), P\2M[Gu(Q
new ImprovedMergeSort(), y(jg#7)
new HeapSort() LJlZ^kh
}; k=ytuV\
I27,mS+]
public static String toString(int algorithm){ "f.Z}AbP
return name[algorithm-1]; tfO#vw,@
} m:QG}{<.h
A#wEuX=[
public static void sort(int[] data, int algorithm) { =3xE:
impl[algorithm-1].sort(data); l:B;zi`)oB
} D=f7NVc>Q
<=K qcHb
public static interface Sort { z9/G4^qF
public void sort(int[] data); )eeN1G`rDE
} -T@`hk`
5N$E()m$
public static void swap(int[] data, int i, int j) { N3BL3:@O
int temp = data; q<vf,D@{ !
data = data[j]; j V3)2C}
data[j] = temp; } l667N
} upn~5>uCP
} `TqSQg_l