[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; H`bSYjgM!
} K%<j=c
int i1=l; :NHH Dl
int i2=mid+1; xJ^>pg8
for(int cur=l;cur<=r;cur++){ G@FI0\t
if(i1==mid+1) [v7^i_d
data[cur]=temp[i2++]; $E<Esf$
else if(i2>r) fqX"Lus `=
data[cur]=temp[i1++]; ZRxZume<f
else if(temp[i1] data[cur]=temp[i1++]; 00I}o%akO
else Ars687WB
data[cur]=temp[i2++]; s4Sd>D7
} ^'CPM6J
} Xp\/YJOibd
OMhef,,H
} h^,8rd
4%4avEa"w
改进后的归并排序: E#J';tUQ
Wt)Drv{@ {
package org.rut.util.algorithm.support; 'w>_+jLT
#/"8F O%~p
import org.rut.util.algorithm.SortUtil; WV3|?,y]qm
W>r#RXmh
/** ?]fF3SJk
* @author treeroot hT$~ygQ
* @since 2006-2-2 qPB8O1fyU
* @version 1.0 tO7v4
*/ IEKU-k7}Z
public class ImprovedMergeSort implements SortUtil.Sort { !TZhQiorC
C{sLz9
private static final int THRESHOLD = 10; S(S#
/MY9 >
/* 7^wc)E^H
* (non-Javadoc) ~!s-o|N_\
* $vHU$lZ/W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u p.Q>28r
*/ /V3=KY`_J
public void sort(int[] data) { F:*W5xX
int[] temp=new int[data.length]; sK{l 9
mergeSort(data,temp,0,data.length-1); +iRq8aS_
} .Ha'p.
<VD8bTk
private void mergeSort(int[] data, int[] temp, int l, int r) { ;^*Unyt[4]
int i, j, k; 4h@Z/G!T3
int mid = (l + r) / 2; /9o!*K
if (l == r) o7mZzzP
return; X;<BzA!H
if ((mid - l) >= THRESHOLD) ,Y3W?
mergeSort(data, temp, l, mid); +!QJTn"3
else ?)bS['^1)
insertSort(data, l, mid - l + 1); |mdi]TL
if ((r - mid) > THRESHOLD) `_b`kzJ
mergeSort(data, temp, mid + 1, r); hN['7:bQ
else 0sI1GhVR
insertSort(data, mid + 1, r - mid); QO"oEgB`+Z
qB)"qFa
for (i = l; i <= mid; i++) { DI!V^M[~u
temp = data; Gpm{m:$L
} qo<&J f
for (j = 1; j <= r - mid; j++) { *x)Ozfe
temp[r - j + 1] = data[j + mid]; UzXE_S
} pO8ePc@=D
int a = temp[l]; >iS`pb
int b = temp[r]; Yvn\xph3
for (i = l, j = r, k = l; k <= r; k++) { +C1QY'>I
if (a < b) { {]"]uT#
data[k] = temp[i++]; Pnd`=%w%]
a = temp; ;<UWA.
} else { `ptj?6N-
data[k] = temp[j--]; n@ w^V
b = temp[j]; dt~YW
} ZeG_en ;
} ]skkoM
} ?"z]A7<Hj
mxb06u_
/** n}s~+USZX
* @param data 3Tn)Z1o
* @param l 5 H#W[^s"
* @param i \rVQQ|l
*/ 7' S@3
private void insertSort(int[] data, int start, int len) { =)hVn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p7:{^
} AfG/JWSo}
} qc#)!
} Oy 2+b1{
} j5 g# M
+ >cBVx6
堆排序： bzdb|I6Z
0i8LWX_M
package org.rut.util.algorithm.support; ^ wY[3"{
<>m }}^
import org.rut.util.algorithm.SortUtil; !QDQ_
# O4gg
/** #2`D`>7456
* @author treeroot 1SrJ6W @j[
* @since 2006-2-2 4%1D}9hO6
* @version 1.0 rQ=,y>-*
*/ U^qt6$bK
public class HeapSort implements SortUtil.Sort{ S1/`th
w[6J `
/* (non-Javadoc) : Sq?a0!S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'R&uD~Q
*/ U%h);!<
public void sort(int[] data) { Mwgu93?
MaxHeap h=new MaxHeap(); kD bhu^~B
h.init(data); hDV20&hq
for(int i=0;i h.remove(); :>itXD!
System.arraycopy(h.queue,1,data,0,data.length); *6 _tQ9G
} "*,XL uv>
QXF aAb=(7
private static class MaxHeap{ 5=e@d:Sz
K-&V,MI
void init(int[] data){ ZNYH#mJX*
this.queue=new int[data.length+1]; p$ bnK]
for(int i=0;i queue[++size]=data; [frq 'c
fixUp(size); ",{ibh)g$`
} o[E_Ge}g8
} <(vCiH9~P
KFa_
private int size=0; 1xv8gC:6
`GXkF:f=
private int[] queue; ?YeWH WM
IF]lHB
public int get() { ={hX}"*D
return queue[1]; JoSJH35=:
} OLI$1d_
eHDef
public void remove() { ^Q&u0;OJ
SortUtil.swap(queue,1,size--); QJ|ap4r
fixDown(1); e)E$}4
} w,Ee>cV]a
file://fixdown v:+~9w+
private void fixDown(int k) { !45.puL0
int j; 7bDHXn
while ((j = k << 1) <= size) { wu"&|dt
if (j < size %26amp;%26amp; queue[j] j++; xV%6k{_:G
if (queue[k]>queue[j]) file://不用交换 c*UvYzDZL
break; qH['09/F6
SortUtil.swap(queue,j,k); `Y?87f:SP
k = j; c^`]`xiX
} /*|oL#hK
} y*MF&mQ[
private void fixUp(int k) { ]jpu,jz:
while (k > 1) { b~-%c_
int j = k >> 1; <9>vO,n
if (queue[j]>queue[k]) ]:34kE}e5
break; kp\\"+,VC
SortUtil.swap(queue,j,k); t\$U`V)
k = j; R-^96fFBy
} r\;ut4wy
} YIR R=qpn
sl*5Y#,|1
} I5h[%T
[%&ZPJT%i
} % >;#9"O4
XR!us/U`a
SortUtil： n<B<93f/
/pp1~r.s?>
package org.rut.util.algorithm; .G o{1[
F7")]q3I~
import org.rut.util.algorithm.support.BubbleSort; ;O<9|?
import org.rut.util.algorithm.support.HeapSort; pStk/te,XK
import org.rut.util.algorithm.support.ImprovedMergeSort; ]\ngX;h8G
import org.rut.util.algorithm.support.ImprovedQuickSort; (LHp%LaZ\;
import org.rut.util.algorithm.support.InsertSort; P9T5L<5
import org.rut.util.algorithm.support.MergeSort; .Yw'oYnS
import org.rut.util.algorithm.support.QuickSort; F]O$(7*
import org.rut.util.algorithm.support.SelectionSort; Su 5>$
import org.rut.util.algorithm.support.ShellSort; Pl-5ncb\
fh^lO ^
/** @xc',I
* @author treeroot Lr`1TH,
* @since 2006-2-2 DQwGUF'(
* @version 1.0 y$<Vha
*/ ttXjn
public class SortUtil { L,;D@Xi
public final static int INSERT = 1; <W]g2>9o9
public final static int BUBBLE = 2; ];%0qb
public final static int SELECTION = 3; KsrjdJx, '
public final static int SHELL = 4; ^*~;k|;&
public final static int QUICK = 5; n4lutnF
public final static int IMPROVED_QUICK = 6; |j3'eW&=
public final static int MERGE = 7; 0j(M* sl
public final static int IMPROVED_MERGE = 8; <5=JE*s$NS
public final static int HEAP = 9; <)*2LBF@]
*-s,. F+c
public static void sort(int[] data) { OiDhJ
sort(data, IMPROVED_QUICK); 8>/Q1(q0
} #P#-xz
private static String[] name={ b|zg<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z!0]/mCE8
}; lcV<MDS
ET];%~ ^
private static Sort[] impl=new Sort[]{ 8}w6z7e|{
new InsertSort(), w:'dhr':
new BubbleSort(), Ap{}^
new SelectionSort(), G|8%qd
new ShellSort(), .WQ<jZt>
new QuickSort(), ,<DB&&EV8
new ImprovedQuickSort(), (z$r:p
new MergeSort(), ~ d^<_R
new ImprovedMergeSort(), ;6 +}z~
new HeapSort() .Wi{lt
}; 20rkKFk*
{G*A.$-d
public static String toString(int algorithm){ ceGa([#!\_
return name[algorithm-1]; e4FM} z[
} 1y^K/.5-
)6~1 ^tD
public static void sort(int[] data, int algorithm) { d3^OEwe
impl[algorithm-1].sort(data); rw)kAe31
} 0ult7s}
/J)l/oI
public static interface Sort { Jw~( G9G
public void sort(int[] data); rwIeqV{:
} i*R,QN)
80M;4nH^5
public static void swap(int[] data, int i, int j) { sS TPMh
int temp = data; htY=w}>
data = data[j]; C6_@\&OA
data[j] = temp; _if|TFw;h
} LflFe@2
} juBw5U<