[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; bWTfP8gT
} aqON6|6K
int i1=l; ) H,Xkex
int i2=mid+1; = wz}yfdrC
for(int cur=l;cur<=r;cur++){ g~DuK|+
if(i1==mid+1) |N/d}
data[cur]=temp[i2++]; httywa^
else if(i2>r) v]k-xn|$j
data[cur]=temp[i1++]; a0|hLqI
else if(temp[i1] data[cur]=temp[i1++]; V_h&9]RL
else ea=E/HR-
data[cur]=temp[i2++]; _,drOF|e
} hU$aZ
} gGrVpOzBj
jrp>Y:
} t]HY@@0g
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改进后的归并排序: "<iH8MzZ
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package org.rut.util.algorithm.support; Cx TAd[az
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import org.rut.util.algorithm.SortUtil; flCT]ZR
_/1/{
/** FCt<h/
* @author treeroot kyHli~Nr"
* @since 2006-2-2 Rzd`MIHDp
* @version 1.0 mi=mwN%UB
*/ NzT &K7v
public class ImprovedMergeSort implements SortUtil.Sort { `G$>T#Dq
BA h'H&;V
private static final int THRESHOLD = 10; ei5YxV6I
}5+^
/* H~FI@Cf$L
* (non-Javadoc) 3X gJZ
* 2F2Hl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DZqPCMz)^
*/ k!Yc_ZB:*l
public void sort(int[] data) { pA!-spgX
int[] temp=new int[data.length]; owIpn=8|Q
mergeSort(data,temp,0,data.length-1); C~2!@<y
} p]kEH\ sh
^+yz}YFM
private void mergeSort(int[] data, int[] temp, int l, int r) { ?F05BS#)X
int i, j, k; KZ5%q.
int mid = (l + r) / 2; iM!2m$'s
if (l == r) i)x0]XF
return; b<tV>d"Fv
if ((mid - l) >= THRESHOLD) |u>V> PN
mergeSort(data, temp, l, mid); ~uhW~bT
else `jeATxWv
insertSort(data, l, mid - l + 1); uZld9u
if ((r - mid) > THRESHOLD) FtTq*[a
mergeSort(data, temp, mid + 1, r); i%o%bib#
else rn-bfzoDS
insertSort(data, mid + 1, r - mid); NO~G4PUM0C
] hT\"5&6
for (i = l; i <= mid; i++) { 5M>h[Q"R
temp = data; j-9)Sijj{
} cM%?Ot,mK"
for (j = 1; j <= r - mid; j++) { )^(gwE
temp[r - j + 1] = data[j + mid]; /5sn*,
} {8.Zb NEJ
int a = temp[l]; >J;TtNE:
int b = temp[r]; z@`o(gh
for (i = l, j = r, k = l; k <= r; k++) { ^os_j39N9
if (a < b) { af|h4.A
data[k] = temp[i++]; FGn"j@m0
a = temp; /bykIUTKI
} else { ]zYIblpde
data[k] = temp[j--]; <,:{Q75
b = temp[j]; ^0zfQu+!
} 5'set?
} |&4A"2QN
} 7L #)yY
no+m.B
/** |Z>-<]p9g
* @param data i"V.$|,
* @param l )5@P|{FF
* @param i ykC3Z<pI.
*/ o<5`uV!f
private void insertSort(int[] data, int start, int len) { [3X\"x5@V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }F]Z1('
} _WNbuk0
} byI" ?
} %1 )c{7
} 6'r;6T *
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堆排序： 'ayb`
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package org.rut.util.algorithm.support; 45 ^ Z5t
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import org.rut.util.algorithm.SortUtil; A l;a~45
R([zlw~B5
/** /%cDX:7X
* @author treeroot *Hx*s_F
* @since 2006-2-2 FF#Aq
* @version 1.0 IFBt#]l0
*/ )M<+?R$];
public class HeapSort implements SortUtil.Sort{ mP*$wE9b,:
y`j_]qvt
/* (non-Javadoc) |-ZML~2S=h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vP,pK=5
*/ Zd-qBOB2L
public void sort(int[] data) { d*|RFU
MaxHeap h=new MaxHeap(); fuj9x;8X0
h.init(data); L-- t(G
for(int i=0;i h.remove(); 9"^ib9M
System.arraycopy(h.queue,1,data,0,data.length); Tbm ~@k(C
} Osz=OO{
'TYO-'aC
private static class MaxHeap{ Y-})/zFc
X QLP|v;"
void init(int[] data){ PV\J] |d,%
this.queue=new int[data.length+1]; {-I+
for(int i=0;i queue[++size]=data; j)/Vtf
fixUp(size); jvQ^Vh!mC
} |]<#![!h#
} 6Mk#) ebM
9gA@D%0
private int size=0; ~U w<e~
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private int[] queue; KAZ<w~55c
:uAL(3pQ
public int get() { (^W}uDPCB
return queue[1]; cS Lj\'`b
} q5r7KYH{
q+[ )i6!?
public void remove() { .=YV
SortUtil.swap(queue,1,size--); g5#LoGc
fixDown(1); +FNGRL
} ;uAh)|;S#
file://fixdown 1^^{;R7N
private void fixDown(int k) { jS]Saqd
int j; Xj]9/?B?
while ((j = k << 1) <= size) { \ C:Gx4K
if (j < size %26amp;%26amp; queue[j] j++; I+Fy)=DO9
if (queue[k]>queue[j]) file://不用交换 p[&Jl
break; S8qg"YR
SortUtil.swap(queue,j,k); }Nn+Ny
k = j; ,]\cf
} P8=|#yCi
} `ZL^+h<b>M
private void fixUp(int k) { F~=kMQO
while (k > 1) { D)G oWt
int j = k >> 1; \\EX'L
if (queue[j]>queue[k]) 9Avj\G
break; Z5'^Hj1,
SortUtil.swap(queue,j,k); a4uy}@9z
k = j; :V6 [_VaF
} LS*L XC
} zq+2@"q
nN$.^!;&
} }s?3
@ *Jbp
} o,j_eheAM
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SortUtil： 2wO8;wiA
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package org.rut.util.algorithm; t$qIJt$
PJ:!O?KVq
import org.rut.util.algorithm.support.BubbleSort; j+'ua=T3
import org.rut.util.algorithm.support.HeapSort; O:I]v@
import org.rut.util.algorithm.support.ImprovedMergeSort; *# <%04f
import org.rut.util.algorithm.support.ImprovedQuickSort; \ P6 !
import org.rut.util.algorithm.support.InsertSort; 7>im2"zm
import org.rut.util.algorithm.support.MergeSort; %_n%-Qn
import org.rut.util.algorithm.support.QuickSort; ?`OFn F,K
import org.rut.util.algorithm.support.SelectionSort; (ID%U
import org.rut.util.algorithm.support.ShellSort; -`ljKp
EyR/
/** vg?(0Gasm*
* @author treeroot hwk] ;6[
* @since 2006-2-2 M%54FsV
* @version 1.0 W`LG.`JW
*/ \="U|LzG
public class SortUtil { :BR_%$
public final static int INSERT = 1; O6e$vI@
public final static int BUBBLE = 2; J|jvqt9C
public final static int SELECTION = 3; % dFz[b
public final static int SHELL = 4; a(IE8:yU`
public final static int QUICK = 5; uUS~"\`fk
public final static int IMPROVED_QUICK = 6; ;R&W#Q7>3
public final static int MERGE = 7; ?$)a[UnqX
public final static int IMPROVED_MERGE = 8; <9H3d7%
public final static int HEAP = 9; Q7pCF,;
vD2(M1Q
public static void sort(int[] data) { S7j(4@
sort(data, IMPROVED_QUICK); `[E-V
} {pi_yr3
private static String[] name={ U`N?<zm<oO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e`a4Gr
}; CUdpT$$x3
.>,Y |
private static Sort[] impl=new Sort[]{ _3u3b/%J?
new InsertSort(), '/D2d
new BubbleSort(), BbFLT@W4
new SelectionSort(), QDJ#zMxFD
new ShellSort(), o *U-.&
new QuickSort(), >&>EjK4?
new ImprovedQuickSort(), XRM/d5
new MergeSort(), Jo8fMG\P
new ImprovedMergeSort(), G \a`F'Oo
new HeapSort() })8D3kzX)
}; Qd~7OH4Lp
[V /f{y~{
public static String toString(int algorithm){ KBi(Ns#+
return name[algorithm-1]; %q r,Ssa/
} <:(;#&<
M-;MwLx
public static void sort(int[] data, int algorithm) { 2T%sHp~qt
impl[algorithm-1].sort(data); 'rXf
} NH5sV.vvc
N DI4EA~z
public static interface Sort { qoT&N,/
public void sort(int[] data); hX,RuI
} 5s%e9x|kP
cJ?,\@uuP
public static void swap(int[] data, int i, int j) { FW2x
int temp = data; (!m6>m2
data = data[j]; <j
data[j] = temp; 4uE)*1
} :Eh}]_
} GXLh(d!C