[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; FLIU}doc
} Sx1OY0)s
int i1=l; EIF
int i2=mid+1; k h6n(B\
for(int cur=l;cur<=r;cur++){ &,* ILz
if(i1==mid+1) @0%[4
data[cur]=temp[i2++]; *DQa6,b
else if(i2>r) /)sP<WPQ6
data[cur]=temp[i1++]; xRZ/[1f!
else if(temp[i1] data[cur]=temp[i1++]; hRqr
else DeI3(o7
data[cur]=temp[i2++]; u[nLrEnD
} ^OK;swDW
} 9zm2}6r4
$y%IM`/w
} [MF&x9Ss?%
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改进后的归并排序: D$VRE^k
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package org.rut.util.algorithm.support; vVSf'w
li0)<("/
import org.rut.util.algorithm.SortUtil; tD,I7%|@
n*9nzx#q
/** 2I7|hZ,
* @author treeroot o3:BH@@
* @since 2006-2-2 D5Z)"~'
* @version 1.0 -op)X>
*/ JW"n#sR4
public class ImprovedMergeSort implements SortUtil.Sort { AuY*x;~
h+Y>\Cxg
private static final int THRESHOLD = 10; EXR6Vb,
z`,dEGfh^
/* j.c{%UYj
* (non-Javadoc) x+v&3YF
* `rV-,-r@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @h(Z;
*/ bk]g}s
public void sort(int[] data) { f/"IC;<~t>
int[] temp=new int[data.length]; FytGg[#]
mergeSort(data,temp,0,data.length-1); h~O^~"jc
} WA.c.{w\
cv. j
private void mergeSort(int[] data, int[] temp, int l, int r) { m%c]+Our`
int i, j, k; 5x!rT&!G
int mid = (l + r) / 2; yh'*eli
if (l == r) -J0I2D
return; ^2i$AM1t
if ((mid - l) >= THRESHOLD) 7cO1(yE#vr
mergeSort(data, temp, l, mid); {7`1m!R
else g+Y &rz
insertSort(data, l, mid - l + 1); a6?t?:~|
if ((r - mid) > THRESHOLD) { T<[-"h
mergeSort(data, temp, mid + 1, r); {U4{v=,!I
else @~FJlG(n
insertSort(data, mid + 1, r - mid); R_"6E8N
D`U,T&@
for (i = l; i <= mid; i++) { qCq?`0&#
temp = data; n*Hx"2XF
} @VyF' ?}
for (j = 1; j <= r - mid; j++) { QHd|cg
temp[r - j + 1] = data[j + mid]; ,rOh*ebF
} :d~mlyFI6P
int a = temp[l]; uc LDl
int b = temp[r]; \\{78WDA
for (i = l, j = r, k = l; k <= r; k++) { %BQ?DTtb7'
if (a < b) { W,:j>vg
data[k] = temp[i++]; 09i77
a = temp; Vddod
} else { 8C*xrg#g:
data[k] = temp[j--]; sXYXBX[
b = temp[j]; 5C9 .h:c4y
} "]q0|ZdOwH
} z?GtC{L9
} 'a$/!~X
|)mUO:*
/** M0hR]4T
* @param data g!i45]6[Nw
* @param l Z% ]LZ/O8
* @param i %}unlSTPP
*/ }H/94]~tH
private void insertSort(int[] data, int start, int len) { e0IGx]5i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QBA{*@ A-
} iz+,,UH
} }4Q3S1|U
} X@/X65=[
} ,V)hV@Dk
w9Nk8OsL
堆排序： &SPIu,
M #%V%<
package org.rut.util.algorithm.support; bPMf='F{r
SQN{/")T
import org.rut.util.algorithm.SortUtil; <~e*YrJ?-
5f75r
/** hTPvt
* @author treeroot %D7'7E8.
* @since 2006-2-2 %Rf{v5
* @version 1.0 4-9cp=\PE
*/ "&\(:#L
public class HeapSort implements SortUtil.Sort{ d <zD@ z
BWr!K5w>i
/* (non-Javadoc) B)dd6R>8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mS.!lkV
*/ Ds@K%f(.?w
public void sort(int[] data) { B5_QH8kt7
MaxHeap h=new MaxHeap(); ES#q/yab5
h.init(data); rMJ4w['J=
for(int i=0;i h.remove(); 24fN3
System.arraycopy(h.queue,1,data,0,data.length); ~se ;L
} mA#^Pv*
jU}
private static class MaxHeap{ "V,dH%&j
@JOsG-VW~
void init(int[] data){ )}k"7"
this.queue=new int[data.length+1]; ObataUxQT
for(int i=0;i queue[++size]=data; @?</8;%3W
fixUp(size); 2]r5e;
} m-qOyt
} uL^X$8K;(
\\ZhM
private int size=0; r%LG>c`^
,pW^>J
private int[] queue; <!X]$kvG
V3axwg_
public int get() { @Q:?,
return queue[1]; #Zn+-Ih
} .SBN^fq
bf[l4$3k
public void remove() { UYpln[S
SortUtil.swap(queue,1,size--); VD{_6
fixDown(1); SQk5SP
} ePxf.U
file://fixdown zj=F4]w
private void fixDown(int k) { 'NnmLM(oh
int j; o/!a7>xO4
while ((j = k << 1) <= size) { C%P.`NxA
if (j < size %26amp;%26amp; queue[j] j++; 7f~7vydZ}
if (queue[k]>queue[j]) file://不用交换 MF$NcU
break; P[e#j
SortUtil.swap(queue,j,k); /FcwsD\=$
k = j; r?`7i'
} u;8bbv4
} [VouG{
private void fixUp(int k) { x/ P\qI
while (k > 1) { D.h<!?E%
int j = k >> 1; ]`}EOS-Q
if (queue[j]>queue[k]) T8vMBaU!qY
break; QFhQfn
SortUtil.swap(queue,j,k); eXmYw^n
k = j; ^{g+HFTA@
} |G)bnmi7
} |mz0 ]
/jOug>s
} =[Tf9uQY
<"S/M]9
} WW~QK2o-@
b~K-mjJI
SortUtil： u_$Spbc]/
KpO%)M!/Z#
package org.rut.util.algorithm; mPi{:
ML X: S?
import org.rut.util.algorithm.support.BubbleSort; BFn}~\wzK
import org.rut.util.algorithm.support.HeapSort; L/O:V^1
import org.rut.util.algorithm.support.ImprovedMergeSort; yF^)H{yx
import org.rut.util.algorithm.support.ImprovedQuickSort; opCQ=G1
import org.rut.util.algorithm.support.InsertSort; AOCiIPw
import org.rut.util.algorithm.support.MergeSort; dr4m}v.
import org.rut.util.algorithm.support.QuickSort; o4&#,m+:
import org.rut.util.algorithm.support.SelectionSort; 2V*<J:;wb
import org.rut.util.algorithm.support.ShellSort; l3kBt-m
l`{JxVg
/** Oin:5K)4-
* @author treeroot +L#):xr
* @since 2006-2-2 uTP4r
* @version 1.0 YFW0
*/ @wXo{p@W
public class SortUtil { 6r)qM)97
public final static int INSERT = 1; 1;+(HB
public final static int BUBBLE = 2; R=HcSRTkA
public final static int SELECTION = 3; vu)V:y
public final static int SHELL = 4; DFqVZ
public final static int QUICK = 5; nZUBblRJ)
public final static int IMPROVED_QUICK = 6; h,'m*@Eg
public final static int MERGE = 7; }sGH}n<9*
public final static int IMPROVED_MERGE = 8; i(<do "Am<
public final static int HEAP = 9; 8f#&CC!L
6z+*H7Qz
public static void sort(int[] data) { No)@#^
sort(data, IMPROVED_QUICK); =7U8`]WA
} $ZE"o`=7
private static String[] name={ :*lB86Ly
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -Cf< #'x_
}; YZ+<+`Mz<
vlZ?qIDe
private static Sort[] impl=new Sort[]{ K7d]p0d'
new InsertSort(), e+O0l
new BubbleSort(), Jm G)=$,
new SelectionSort(), 6.GIUM%D
new ShellSort(), !rgdOlTR^
new QuickSort(), m2Q#ATLW
new ImprovedQuickSort(), ,vUMy&AV
new MergeSort(), ed7Hz#Qc
new ImprovedMergeSort(), qL68/7:A
new HeapSort() tPho4,x$
}; 9Dy/-%Ut9
affig
public static String toString(int algorithm){ ^'aMp}3iu
return name[algorithm-1]; .;9I:YB$
} WqRg/
:+|os"
public static void sort(int[] data, int algorithm) { 0@8EIQxK"
impl[algorithm-1].sort(data); ||k^pzj%
} ]#x?[F
B(dq$+4
public static interface Sort { *Z"(K\1TH
public void sort(int[] data); |Xl,~-.
} m.N/g,
0sKY;(
public static void swap(int[] data, int i, int j) { Ot_xeg;7
int temp = data; P(za8l>
data = data[j]; ws$!-t4<(
data[j] = temp; t6O/Q0_
} l]o&D))R
} }x1p~N+;