[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; dGZie.Zx
} o2fih%p?1
int i1=l; KjGu !B
int i2=mid+1; a>j}@8[J
for(int cur=l;cur<=r;cur++){ ]B/>=t"E
if(i1==mid+1) _H$Lu4b)N
data[cur]=temp[i2++]; u^MKqI
else if(i2>r) ~&Z>fgOTJ
data[cur]=temp[i1++]; J3yK^@&&
else if(temp[i1] data[cur]=temp[i1++]; e#[Klh$]EW
else sH6;__e
data[cur]=temp[i2++]; (.-4Jn
} -XYvjW,|
} O84]J:b
hQ#e;1uD
} j\C6k
$>)0t@[f
改进后的归并排序: 7. F'1oEf
+Tum K.
package org.rut.util.algorithm.support; oN032o?S
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import org.rut.util.algorithm.SortUtil; 6]7csOE
TFXBN.?9T
/** 5FZw (E
* @author treeroot 'jt7H{M
* @since 2006-2-2 9E7G%-
* @version 1.0 t}+/GSwT
*/ TpU\IQ
public class ImprovedMergeSort implements SortUtil.Sort { rC8p!e.yL
#-yCR
private static final int THRESHOLD = 10; Lx,=Up.
|k.'w<6mb9
/* ]p!{
* (non-Javadoc) xXJ*xYn"}
* eiK_JPFA-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *PF<J/Pr
*/ .n<vhLDQn
public void sort(int[] data) { $zP5Hzx
int[] temp=new int[data.length]; 2yA)SGri
mergeSort(data,temp,0,data.length-1); U[wx){[|
} bq/Aopfr
um,f!ho-U
private void mergeSort(int[] data, int[] temp, int l, int r) { YTTyMn
int i, j, k; %IsodtkDu
int mid = (l + r) / 2; f.w",S^
if (l == r) D:T]$<=9
return; i{^T;uAE
if ((mid - l) >= THRESHOLD) wOAR NrPx2
mergeSort(data, temp, l, mid); o/N!l]r
else kcfT|@:MK"
insertSort(data, l, mid - l + 1); dlYpbw}W&<
if ((r - mid) > THRESHOLD) AE rPd)yk0
mergeSort(data, temp, mid + 1, r); =|oi0
else %]+R>+
insertSort(data, mid + 1, r - mid); "3RFyi
fZiAl7b!
for (i = l; i <= mid; i++) { J?O0ixU
temp = data; 01r%K@ xX\
} ~i|6F~%3
for (j = 1; j <= r - mid; j++) { R XCn;nM4
temp[r - j + 1] = data[j + mid]; )]@h}K}
} 'rB%a<
int a = temp[l]; ?[JP[ qS
int b = temp[r]; J*;RL`
for (i = l, j = r, k = l; k <= r; k++) { nH#>_R (
if (a < b) { C hF~
data[k] = temp[i++]; Y-ao yoNS
a = temp; UGAV"0
} else { t6"%u3W8M
data[k] = temp[j--]; C:B7%<
b = temp[j]; KlT:&1SB9
} `nF SJlr&
} 7ws<' d7/
} R*r4)+gd
UF+Qx/4h0
/** 2>o[
* @param data *2h%dT:,%
* @param l G4(R/<J,BQ
* @param i ?Bf>G]zx
*/ Yc[umn^K
private void insertSort(int[] data, int start, int len) { 3RaduN]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); AR[m+E
} u`'"=Y_E
} E0ED[d,
} ^8 VW$}
} KW:N 6w
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堆排序： nXT`7
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package org.rut.util.algorithm.support; nQc,^A)I
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import org.rut.util.algorithm.SortUtil; \]>YLyG
6q^$}eOt
/** FJ3S
* @author treeroot @1*^ttC
* @since 2006-2-2 3L&:
* @version 1.0 3m>YR-n$
*/ oh{>nwH
public class HeapSort implements SortUtil.Sort{ 7DAP_C
w5>[hQR\
/* (non-Javadoc) ||:>&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %0GwO%h},
*/ \OW:-
public void sort(int[] data) { 8 W
MaxHeap h=new MaxHeap(); qPPe)IM'Sc
h.init(data); =mYf] PIX
for(int i=0;i h.remove(); xSudDhRP
System.arraycopy(h.queue,1,data,0,data.length); Xl4}S"a
} cKVFykwM
owIpn=8|Q
private static class MaxHeap{ fOi Rstci
]?}>D?5
void init(int[] data){ VlV X
this.queue=new int[data.length+1]; T<n`i~~
for(int i=0;i queue[++size]=data; xX&B&"]5
fixUp(size); Jj=qC{]
} KZ5%q.
} }PI:O%N;
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private int size=0; 8"&!3_
d27q,2f!
private int[] queue; nI3p`N8j*
*'?ZG/ (
public int get() { Kg6J:HD49
return queue[1]; s,Gl{
} ek&~A0k_o
|.@!CqJ
public void remove() { T1C_L?L
SortUtil.swap(queue,1,size--); :Q`Of}#
fixDown(1); Q+Bl1xl
} 'APx
file://fixdown JSB+g;
private void fixDown(int k) { H@(O{ 9Yl;
int j; 7Yg1z%%U
while ((j = k << 1) <= size) { v]cw})l
if (j < size %26amp;%26amp; queue[j] j++; LGhK)]:
if (queue[k]>queue[j]) file://不用交换 x'L=p01
break; 5len}){
SortUtil.swap(queue,j,k); #aX#gh}1
k = j; K+~?yOQj
} FxlH;'+Q
} /NQrE#pb
private void fixUp(int k) { We y*\@
while (k > 1) { RsDSsux
int j = k >> 1; ,NGHv?.N
if (queue[j]>queue[k]) #zP-,2!r
break; 5qM$ahN3wH
SortUtil.swap(queue,j,k); lc <V_8
k = j; :u7BCV|yr
} $z_yx `5
} :aOR@])>o
^=x/:0
} ;n't:yQW
f9#zV2ke]
} )5@P|{FF
ykC3Z<pI.
SortUtil： E+Bc>xl@m
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package org.rut.util.algorithm; )1 -<v);
XHA|v^
import org.rut.util.algorithm.support.BubbleSort; ;y(;7n_ a
import org.rut.util.algorithm.support.HeapSort; 9JdJn>
import org.rut.util.algorithm.support.ImprovedMergeSort; k[8F: T-
import org.rut.util.algorithm.support.ImprovedQuickSort; {H/%2
import org.rut.util.algorithm.support.InsertSort; I7_8oq\3D
import org.rut.util.algorithm.support.MergeSort; qIJc\,'
import org.rut.util.algorithm.support.QuickSort; G y[5'J`
import org.rut.util.algorithm.support.SelectionSort; _|\X8o_
import org.rut.util.algorithm.support.ShellSort; 0f5 ag&
W/UA%We3+L
/** >T;!Z5L1
* @author treeroot $TK*w8@:
* @since 2006-2-2 z6w'XA1_+t
* @version 1.0 "" UyfC[
*/ !Q"L)%)'A
public class SortUtil { -Y524
public final static int INSERT = 1; }aOqoi7w
public final static int BUBBLE = 2; 8Ay7I
public final static int SELECTION = 3; 8(Az/@=n
public final static int SHELL = 4; ~g!!#ad
public final static int QUICK = 5; p*PzfSLN
public final static int IMPROVED_QUICK = 6; N~]qQoj,
public final static int MERGE = 7; +Kgl/Wg%
public final static int IMPROVED_MERGE = 8; 62ru%<x=
public final static int HEAP = 9; lZAGoR;0Ra
v(;yy{>8"
public static void sort(int[] data) { ]?]M5rP
sort(data, IMPROVED_QUICK); Z=8&`
} 6-\Mf:%B
private static String[] name={ -,/7u3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0y|1@CS
}; ';G/,wB?`
4AL,=C3
private static Sort[] impl=new Sort[]{ PV\J] |d,%
new InsertSort(), {-I+
new BubbleSort(), j)/Vtf
new SelectionSort(), jvQ^Vh!mC
new ShellSort(), *m]Y6
new QuickSort(), {*;8`+R&
new ImprovedQuickSort(), K\ Wzh;
new MergeSort(), g#i~^4-1
new ImprovedMergeSort(), 3chx4
new HeapSort() WzFXF{(
}; _xAru9=n^
vk|f"I
public static String toString(int algorithm){ B{\Y~>]Pj
return name[algorithm-1]; l1]N&jN{
} ;#zteqn
4Yvz-aSyO
public static void sort(int[] data, int algorithm) { c9c]1XJ
impl[algorithm-1].sort(data); #jBmWaP.
} ?8$`GyjS
3~fi#{
public static interface Sort { :JSxsA6k
public void sort(int[] data); 3F"vK
} ;q'-<O
D,=~7/g
public static void swap(int[] data, int i, int j) { 8\;, d
int temp = data; NUM!'+H_h
data = data[j]; oC" [rn
data[j] = temp; s2L]H
} 5 v.&|[\k
} A'CD,R+gR