[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; ~Q>_uw}g#
} .F(i/)vaq|
int i1=l; A _XhuQB;d
int i2=mid+1; MHsc+gQiz
for(int cur=l;cur<=r;cur++){ TH$N5w%
if(i1==mid+1) $pFo Rv
data[cur]=temp[i2++]; Q~j`YmR|
else if(i2>r) W~p/,HcM
data[cur]=temp[i1++]; aOiR l,
else if(temp[i1] data[cur]=temp[i1++]; ltD37QZQ
else 3l3'bw2
data[cur]=temp[i2++]; YJl("MZ
} ,iv|Pq$!
} ")!,ZD
%o:2^5\W
} {FG|\nPw
a'jR#MQl?
改进后的归并排序: Xixqxm*8
HH@qz2w
package org.rut.util.algorithm.support; CBD6bl|A
ea00\
import org.rut.util.algorithm.SortUtil; X0M1(BJgGo
SJ};TEA
/** vJU*>U,
* @author treeroot K a(J52
* @since 2006-2-2 lME)?LOI
* @version 1.0 /M*a,o
*/ zdEPDdB
public class ImprovedMergeSort implements SortUtil.Sort { p$x{yz3
" $ew~;z
private static final int THRESHOLD = 10; Iz{R}#8CZ
IW%|G
/* S.d^T](
* (non-Javadoc) ?w+Ix~k
* j`*#v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,57`D'
*/ !DI{:I_h(
public void sort(int[] data) { pKjoi{ Z
int[] temp=new int[data.length]; wj1{M.EF\
mergeSort(data,temp,0,data.length-1); pIKSs<IP
} ?&^?-S% p
!grVR157P
private void mergeSort(int[] data, int[] temp, int l, int r) { fuB)qt!E
int i, j, k; CCX8>09
int mid = (l + r) / 2; V86Xg:?7
if (l == r) ocyb5j
return; %O<%UmR
if ((mid - l) >= THRESHOLD) 8B#GbS K
mergeSort(data, temp, l, mid); M!tXN&V]
else A?oXqb
insertSort(data, l, mid - l + 1); G_dsrpI=N
if ((r - mid) > THRESHOLD) KV*xApb9y
mergeSort(data, temp, mid + 1, r); }irn'`I
else DS%\SrC
insertSort(data, mid + 1, r - mid); /De^
@5[kcU>
for (i = l; i <= mid; i++) { ]Y| 9?9d
temp = data; s#S%#LM
} vc]cNz:mQ
for (j = 1; j <= r - mid; j++) { Y&^P"Dw
temp[r - j + 1] = data[j + mid]; 1 `7<2w
} E3*\ ^Q_
int a = temp[l]; {" 4e+y
int b = temp[r]; ad_`x
for (i = l, j = r, k = l; k <= r; k++) { 2]c{P\
if (a < b) { j}AFE
data[k] = temp[i++]; W},b{NT
a = temp; ejO}t:}P
} else { zP;cTF(C
data[k] = temp[j--]; R i'L
b = temp[j]; $DP&a1'g
} Na\WZSu'"
} atW'
} xwH?0/
$7'gRb4
/** {q3H5csFq
* @param data pW]4bx@E
* @param l gXH[$guf
* @param i kGUJ9Du
*/ vw)7 !/#
private void insertSort(int[] data, int start, int len) { u?[ q=0.J7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3F#+~^2
} C P3<1~
} er.CDKD%L
} :vL1}H<
} 1H,g=Y4f%
7 ua6l[c
堆排序： 8v)_6p(<x8
EOoZoVdzx
package org.rut.util.algorithm.support; O`$#Pg
zj|/ CxV
import org.rut.util.algorithm.SortUtil; }elH75[64
nSCWg=E^
/** R <"6ojn
* @author treeroot oQ7]=|
* @since 2006-2-2 zLD|/`
* @version 1.0 /V?H4z[G
*/ {gKN d*[*
public class HeapSort implements SortUtil.Sort{ ]}UgS+g>$
5`<eKwls
/* (non-Javadoc) s:AkkkF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V >,Z-&.%
*/ <q,+ON\'
public void sort(int[] data) { Cj*-[EL<
MaxHeap h=new MaxHeap(); dtAbc7
h.init(data); G^(}a]>9
for(int i=0;i h.remove(); EHlytG}@
System.arraycopy(h.queue,1,data,0,data.length); a?R[J==
} Q8MS,7y/
m4[g6pNx~
private static class MaxHeap{ ?'r9"M>
hGf-q?7
void init(int[] data){ {FI\~q
this.queue=new int[data.length+1]; vSW L$Y2
for(int i=0;i queue[++size]=data; b59{)u4F
fixUp(size); 3qQUpm+
} = zl=SLe
} ?R5'#|EyX
)n=ARDd^e
private int size=0; ?_`0G/xl
111D3
private int[] queue; $A}QY5`+~S
!eJCM`cp
public int get() { jFerYv&K~
return queue[1]; PVao
} F8+e,x
^\:2}4Uj_
public void remove() { jvzBh-!
SortUtil.swap(queue,1,size--); &&L"&Rc
fixDown(1); :ZxLJK9x1
} @1R8-aa-r
file://fixdown -s$<Op{s
private void fixDown(int k) { 0v^:
int j; T[Pa/j{
while ((j = k << 1) <= size) { s{/qS3=
if (j < size %26amp;%26amp; queue[j] j++; :o"8MZp
if (queue[k]>queue[j]) file://不用交换 dZGbC9
break; MF[z-7
SortUtil.swap(queue,j,k); jK8'T_Pah
k = j; P.sgRsL
} k:#6^!b1
} d \>2
private void fixUp(int k) { <E\V`g
while (k > 1) { PG,U6c #
int j = k >> 1; D{'#er
if (queue[j]>queue[k]) Xev54!619
break; 4%*hGh=
SortUtil.swap(queue,j,k); /!Z^Y
k = j; eFTX6XB:i
} 6(sIYZ2yq
} S2~@nhO`U(
THhy~wC".
} v6e%#=
g$j6n{Yl
} qvt-
/f1'm@8;
SortUtil： *rqm8z50a
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package org.rut.util.algorithm; 2r];V'r
zL s^,x
import org.rut.util.algorithm.support.BubbleSort; j.3o W
import org.rut.util.algorithm.support.HeapSort; # nfI%
import org.rut.util.algorithm.support.ImprovedMergeSort; SvK1.NUa
import org.rut.util.algorithm.support.ImprovedQuickSort; ke/_k/
import org.rut.util.algorithm.support.InsertSort; W'_/6_c$!
import org.rut.util.algorithm.support.MergeSort; r@T| e
import org.rut.util.algorithm.support.QuickSort; Su8'$CFz$.
import org.rut.util.algorithm.support.SelectionSort; f|xLKcOP
import org.rut.util.algorithm.support.ShellSort; =hw^P%Zn
9u wL{P&
/** U |F>W~%
* @author treeroot [V@yRWI
* @since 2006-2-2 "7?js $
* @version 1.0 OoP@-D"e
*/ {U <tc4^
public class SortUtil { rbk<z\pc
public final static int INSERT = 1; !Y;<:zx5
public final static int BUBBLE = 2; "+iAd.qd
public final static int SELECTION = 3; {Iy7.c8S
public final static int SHELL = 4; s?O&ZB2GM[
public final static int QUICK = 5; ;mO,3dV
public final static int IMPROVED_QUICK = 6; ]5|z3<K^
public final static int MERGE = 7; Goj4`Hc
public final static int IMPROVED_MERGE = 8; j$eCe<.3
public final static int HEAP = 9; gJ\%>r7h
Ugi5OKdj7)
public static void sort(int[] data) { RT"O;P
sort(data, IMPROVED_QUICK); +0pW/4x
} PW_`qP:
private static String[] name={ i+~QDo(Pi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I^fPk
}; T2bnzIi
) Ypz!
private static Sort[] impl=new Sort[]{ ItK
new InsertSort(), X*Z5 P
new BubbleSort(), J5T=!wF (
new SelectionSort(), tE!'dpG5)
new ShellSort(), 0&`}EXe<f
new QuickSort(), #t5juX9Ho9
new ImprovedQuickSort(), b*9e1/]
new MergeSort(), <`JG>H*B6
new ImprovedMergeSort(), ,L-C(j
new HeapSort() 3.)_uo0;o
}; v7@H\x*
Qp&?L"U)2
public static String toString(int algorithm){ !b%,'fy)
return name[algorithm-1]; ||a`fH
} T|f_~#?eV
a!.!2a&t
public static void sort(int[] data, int algorithm) { g)M#{"H
impl[algorithm-1].sort(data); w2)/mSnu
} 5X;?I/9
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public static interface Sort { h}6b&m
public void sort(int[] data); ;a{rWz1Wm
} ,cQ)cY[
#D:RhqjK
public static void swap(int[] data, int i, int j) { (^S5Sc=
int temp = data; `9EVB;
data = data[j]; L;C|ow^c
data[j] = temp; _z:Qhe
} $Z7:#cZ Y
} |B1Af