[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; r>+Hwj0>
} O=os ,'"
int i1=l; kc&>l(
int i2=mid+1; RulZh2C
for(int cur=l;cur<=r;cur++){ n7~!klF-
if(i1==mid+1) 'L#qR)t
data[cur]=temp[i2++]; |RqCw7
else if(i2>r) iqecm]Z0
data[cur]=temp[i1++]; (5@9j
else if(temp[i1] data[cur]=temp[i1++]; 5MJ`B:He+
else w7Nb+/,sg
data[cur]=temp[i2++]; 1Yt;1k'
} h,Y MR3:X
} -a`EL]NX
*#j+,q!X
} ~8'4/wh+8
K~nk:}3Ui
改进后的归并排序: 7&G[mOx0
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package org.rut.util.algorithm.support; c1j)
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import org.rut.util.algorithm.SortUtil; YH`/;H=$G/
Gy36{*
/** CFJ F}aW
* @author treeroot zn5
* @since 2006-2-2 \XR%pC
* @version 1.0 4kO[|~#
*/ Dx/!^L02
public class ImprovedMergeSort implements SortUtil.Sort { zR)|%[sWwQ
ua(y! Im
private static final int THRESHOLD = 10; &_ er_V~
VNx|nP&
/* ]E90q/s@c
* (non-Javadoc) 84[T!cDk
* T2# W=P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %-@`|
*/ (j-[m\wF
public void sort(int[] data) { L{$ZL&
int[] temp=new int[data.length]; C)> ])'S
mergeSort(data,temp,0,data.length-1); gBRhO^Sz
} >8;Co]::kx
F,#)8>O
private void mergeSort(int[] data, int[] temp, int l, int r) { Yo:l@(
int i, j, k; 8:,E=swe
int mid = (l + r) / 2; -A}*Aa'\
if (l == r) P/._ tQu6
return; y|!%C-P
if ((mid - l) >= THRESHOLD) Xui${UYN
mergeSort(data, temp, l, mid); gkS#=bv9e@
else | ]`gps
insertSort(data, l, mid - l + 1); U6qv8*~
if ((r - mid) > THRESHOLD) uAT01ZEm
mergeSort(data, temp, mid + 1, r); ,)A^3Q*
else jh.W$.Oq
insertSort(data, mid + 1, r - mid); [X:mmM0gd
'pOtd7Vr
for (i = l; i <= mid; i++) { R}4o{l6
temp = data; pYV$sDlD
} q4vu r>m6
for (j = 1; j <= r - mid; j++) { KU[eY}
temp[r - j + 1] = data[j + mid]; 6~\z]LZ
} uf,4GPo,
int a = temp[l]; N$J)Ow
int b = temp[r]; a#W:SgE?Y
for (i = l, j = r, k = l; k <= r; k++) { <Ft6d
if (a < b) { fAWjk&9
data[k] = temp[i++]; GP ;c$pC
a = temp; ^\ &:'$f+8
} else { ]H7_bix
data[k] = temp[j--]; 8Dpf{9Y-E
b = temp[j]; ABEC{3fWpu
} zcItZP
} W5?F?Dp!v
} z<rdxn,9
pmXx2T#=
/** wzB*M}3
* @param data S4kGy}{+i
* @param l RsU=fe,
* @param i +uW$/_Y$
*/ F.?`<7
private void insertSort(int[] data, int start, int len) { Oy[1_qfP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }.|\<8_
} 0B)l"$W[)/
} #"d.D7nA
} d -6[\S#
} w3:WvA5jt
Y-&r_s_~
堆排序： ,s0E]](
%[4/UD=7
package org.rut.util.algorithm.support; cs`/^2Vf"#
Y."ujo#bB
import org.rut.util.algorithm.SortUtil; %a+X\\v2
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/** !c:Q+:,H
* @author treeroot Ea1{9>S
* @since 2006-2-2 "+s#!Fh *
* @version 1.0 *w4jET>
*/ ,.tT9? m
public class HeapSort implements SortUtil.Sort{ EDvK9J
&$ F0
/* (non-Javadoc) qie7iE`o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YE&"IH]lF
*/ La?q>
public void sort(int[] data) { c;e-[F7
MaxHeap h=new MaxHeap(); 2;%DE<Z
h.init(data); )F&@ M;2p'
for(int i=0;i h.remove(); =If% m9
System.arraycopy(h.queue,1,data,0,data.length); C1P{4 U
} {rGq|Bj
Vn? %w~0!
private static class MaxHeap{ )eGGA6G
}GsZ)\!$4
void init(int[] data){ -h*Yd)
this.queue=new int[data.length+1]; >b,o yM
for(int i=0;i queue[++size]=data; dN;kYWRK
fixUp(size); NUb^!E"
} tx&>Eo
} wNDLN`,^H
9}`O*A=KC
private int size=0; &KgR;.R^J
`LH!"M
private int[] queue; WKX5Dl
cO<]%L0
public int get() { 57IrD*{
return queue[1]; \v]}
} wRb%-s
?LgR8/Io@5
public void remove() { l9)iLOj
SortUtil.swap(queue,1,size--); j>eL&.d
fixDown(1); MLY19;e
} >1a-}>r
file://fixdown Vj4 if@Z
private void fixDown(int k) { $/],QD_;"
int j; wQ!~c2a<8
while ((j = k << 1) <= size) { ~wDmt
if (j < size %26amp;%26amp; queue[j] j++; |K'{R'A
if (queue[k]>queue[j]) file://不用交换 %cO;{og M
break; \8Mkb]QA
SortUtil.swap(queue,j,k); N<hbV0$%
k = j; 3XY$w&f
} vX)6N#D!
} t*<vc]D
private void fixUp(int k) { xC`Hm?kM
while (k > 1) { jM1_+Lm1
int j = k >> 1; :7Rs$ -*Uk
if (queue[j]>queue[k]) (U2G"
break; )(*A1C[
SortUtil.swap(queue,j,k); FR0zK=\
k = j; aRq7x~j )\
} <.$<d
} dJ?VN!B0
Y+iC/pd
} G#5Cyu<r!
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} ixBM>mRK
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SortUtil： vPmP<c)cb
h@Ea$1'e,
package org.rut.util.algorithm; dVVeH\o
b-]E-$Uz
import org.rut.util.algorithm.support.BubbleSort; oF.Fg<p(
import org.rut.util.algorithm.support.HeapSort; @5 kKMz
import org.rut.util.algorithm.support.ImprovedMergeSort; 9/}i6j8Z
import org.rut.util.algorithm.support.ImprovedQuickSort; s7I*=}{g0.
import org.rut.util.algorithm.support.InsertSort; ,p1 (0i
import org.rut.util.algorithm.support.MergeSort; & /-@R|
import org.rut.util.algorithm.support.QuickSort; .`Z{ptt>
import org.rut.util.algorithm.support.SelectionSort; k}ps-w6:
import org.rut.util.algorithm.support.ShellSort; "x9xJ
z:u`W#Rf
/** B_hob
* @author treeroot MGc=TQ.
* @since 2006-2-2 @EfCNOy
* @version 1.0 #H O\I7m
*/ *Vfas|3hZI
public class SortUtil { z$ysp!
public final static int INSERT = 1; KyXgw
public final static int BUBBLE = 2; :m8ED[9b
public final static int SELECTION = 3; ||`w MWq
public final static int SHELL = 4; ><LIOFqsS
public final static int QUICK = 5; |GK [I
public final static int IMPROVED_QUICK = 6; ^eM=h
public final static int MERGE = 7; 1GOa'bxm
public final static int IMPROVED_MERGE = 8; Cb=r8C
public final static int HEAP = 9; oge^2
Ep5lmzg
public static void sort(int[] data) { vlyq2>TfR
sort(data, IMPROVED_QUICK); (n" )
} 8o-?Y.2
private static String[] name={ ]~WP;o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :m#vvH
}; MFW?m,It)
hp-<8Mf
private static Sort[] impl=new Sort[]{ ,z1# |Y
new InsertSort(), n/$BdFH
new BubbleSort(), C^nL{ZP,
new SelectionSort(), G8u8&|
new ShellSort(), ^l$(-#'y
new QuickSort(), YD.3FTNGC
new ImprovedQuickSort(), |\QR9>
new MergeSort(), h4?+/jk7
new ImprovedMergeSort(), f@LUp^Z/v
new HeapSort() wB9IP{Pf
}; L%B+V;<h3
Td;e\s/]
public static String toString(int algorithm){ r0\bi6;s/
return name[algorithm-1]; DIk$9$"<x
} X'kw5P!sq
.kC}. Q_
public static void sort(int[] data, int algorithm) { Hkg@M?(
impl[algorithm-1].sort(data); n:wn(BC3
} #H!~:Xu
J3:P/n&
public static interface Sort { tH_#q"@)
public void sort(int[] data); IE_@:]K}Ja
} v/m`rc]e
jQb=N%5s
public static void swap(int[] data, int i, int j) { IC}zgvcW
int temp = data; LrPDpTd
data = data[j]; GC4$9q}C4Z
data[j] = temp; JYSw!!eC
} FblGFm"P
} :[ITjkhde0