[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; kAB+28A
} *xo;pe)9
int i1=l; 'tu@`7*
int i2=mid+1; /sT ^lf=
for(int cur=l;cur<=r;cur++){ cI%"Ynq"3
if(i1==mid+1) W6Aj<{\F
data[cur]=temp[i2++]; 6;[/9
else if(i2>r) 1S(\2{Ylo
data[cur]=temp[i1++]; [&pW&>p3
else if(temp[i1] data[cur]=temp[i1++]; 9ze|s^
else oS#'u1k
data[cur]=temp[i2++]; {pb9UUP2
} sLAuR
} KW|\)83$
T<f\*1~^
} ImV]}M~_
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改进后的归并排序: .Y(lB=pV
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package org.rut.util.algorithm.support; b WbXh$
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import org.rut.util.algorithm.SortUtil; QSF"8Uk
I& M36f
/** =%3b@}%HqS
* @author treeroot z{@R.'BD
* @since 2006-2-2 )v52y8G-p
* @version 1.0 hY=w|b=Y
*/ IObx^N_K
public class ImprovedMergeSort implements SortUtil.Sort { MZ5Y\-nq\
J}(6>iuQY?
private static final int THRESHOLD = 10; gmRT1T
.B'UQ|NR
/* &whX*IZ{
* (non-Javadoc) |/;U)M
* %0yS98']g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $Eio$TI
*/ /BMtcCPG!
public void sort(int[] data) { ^KkRF":
int[] temp=new int[data.length]; V\6(d
mergeSort(data,temp,0,data.length-1); fimb]C I|x
} |As2"1_f
o#xgrMB
private void mergeSort(int[] data, int[] temp, int l, int r) { X%GD0h]X#
int i, j, k; s!#HZK
int mid = (l + r) / 2; zb5N,!%r
if (l == r) Xb]=:x(
return; kG)2%
if ((mid - l) >= THRESHOLD) T~%H%O(F
mergeSort(data, temp, l, mid); sn-)(XU!
else $T?*0"Mj[
insertSort(data, l, mid - l + 1); g/8.W
if ((r - mid) > THRESHOLD) $s-9|Lbs`
mergeSort(data, temp, mid + 1, r); S~0JoCeo
else k]?z~p
insertSort(data, mid + 1, r - mid); PMgQxM*h
IS[Vap:
for (i = l; i <= mid; i++) { {J~(#i k
temp = data; ?wd|G4.Vo
} I?a8h`WS+
for (j = 1; j <= r - mid; j++) { ,AH0*L
temp[r - j + 1] = data[j + mid]; 4K9Rpm
} xfq]9<
int a = temp[l]; F#(.v7Za
int b = temp[r]; ch@x]@-;A3
for (i = l, j = r, k = l; k <= r; k++) { |JUe>E*
if (a < b) { tu\mFHvlg
data[k] = temp[i++]; l80bHp=
a = temp; 8p (!]^z
} else { fokwW}>B[f
data[k] = temp[j--]; fyI_
b = temp[j]; D@8jGcz62
} +w"_$Tj@;
} *Ph]F$ZP
} dG&2,n'f
"~u_\STn <
/** [@m[V1D
* @param data F`!TV(,bY
* @param l c[SU5 66y
* @param i zwK }7h6]
*/ zKLn!b#>
private void insertSort(int[] data, int start, int len) { NSw<t9Yi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XQ]`&w(
} #gh p/YoTq
} tbq|,"
} Ko#4z%Yq
} z!fdx|PUX
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堆排序： c~P)4(udT
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package org.rut.util.algorithm.support; nV'3sUvR#
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import org.rut.util.algorithm.SortUtil; $[,l-[-+
vXephR'
/** W1vCN31
* @author treeroot Fse['O~
* @since 2006-2-2 $^t<9"t
* @version 1.0 ,Ij=b
*/ #wF1
public class HeapSort implements SortUtil.Sort{ n ]w7Zj
AzZJG v]H
/* (non-Javadoc) 1e/L\Y=m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l '/N3&5
*/ 3[VWTq)D=
public void sort(int[] data) { [*<.?9n)or
MaxHeap h=new MaxHeap(); (vKI1^,
h.init(data); ! ,@ZQS
for(int i=0;i h.remove(); UxyY<H~Wx
System.arraycopy(h.queue,1,data,0,data.length); dY8(nQG
} _R)&k%i}
q0Xoj__c!A
private static class MaxHeap{ @rF/]UJ
MEEAQd<*
void init(int[] data){ e#.\^
this.queue=new int[data.length+1]; E#8_hT]5
for(int i=0;i queue[++size]=data; gI)u}JX
fixUp(size); + 3h`UF
} "%VbI P
} V]rhVMA
< kz[:n:
private int size=0; jo)6 %w]
i3\~Qj;1
private int[] queue; H)E^!eo
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public int get() { W<v_2iVu
return queue[1]; 7F9;Su3.
} `)$`-Pw*
B| tzF0;c
public void remove() { SET-8f
SortUtil.swap(queue,1,size--); Txo@U
fixDown(1); c5("-xB
} ~b Rd)1
file://fixdown [(|^O>k8c
private void fixDown(int k) { vf<UBa;Xm
int j; M ?*Tf&
while ((j = k << 1) <= size) { 34ha26\np
if (j < size %26amp;%26amp; queue[j] j++; vIVr@1S
if (queue[k]>queue[j]) file://不用交换 O+_N!/
break; ZHCr2^w6
SortUtil.swap(queue,j,k); Q[uAIyv0
k = j; 77*qkKr
} If;R?j0;Q
} 4O(@'#LLz
private void fixUp(int k) { r,4lqar;E
while (k > 1) { OEnDsIhq
int j = k >> 1; W5.Va.
if (queue[j]>queue[k]) L]I3P|y_
break; cD2+hp|9
SortUtil.swap(queue,j,k); &Yf",KcL*I
k = j; n_P3\Y|
} qaG#;
} f"Vgefk
A "S/^<
} %&+TbDE+T
E"#Xc@
} 1CkdpYjsj
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SortUtil： VYaSB?`/
j)Y[4 ^k^
package org.rut.util.algorithm; gRAC d&)
` H XEZ|
import org.rut.util.algorithm.support.BubbleSort; ]GX \|1L
import org.rut.util.algorithm.support.HeapSort; ZB[k{Y
import org.rut.util.algorithm.support.ImprovedMergeSort; ong""K4H
import org.rut.util.algorithm.support.ImprovedQuickSort; 3?.1nGu
import org.rut.util.algorithm.support.InsertSort; s]H^wrg&
import org.rut.util.algorithm.support.MergeSort; xx }GOY.J
import org.rut.util.algorithm.support.QuickSort; rk|a5-i
import org.rut.util.algorithm.support.SelectionSort; fxgU~'
import org.rut.util.algorithm.support.ShellSort; \G>ZkgU
iY~rne"l
/** O4L#jBa+
* @author treeroot {U"^UuU]
* @since 2006-2-2 ]Bnwk o
* @version 1.0 ,a0pAj
*/ ;Lo&}U3F,!
public class SortUtil { C!&y
public final static int INSERT = 1; JYm7@gx
public final static int BUBBLE = 2; gsPl _
public final static int SELECTION = 3; UXH"si:
public final static int SHELL = 4; P=`1rjPE
public final static int QUICK = 5; 8uch i
public final static int IMPROVED_QUICK = 6; /(?@mnq_
public final static int MERGE = 7; oY=1C}
public final static int IMPROVED_MERGE = 8; 3A,rHYS
public final static int HEAP = 9; "NzD1k6.L
V*RdDF7
public static void sort(int[] data) { }T.?c9l X
sort(data, IMPROVED_QUICK); ?WpenUWk
} )R?;M
private static String[] name={ ]]BOk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,*Z.
}; HjA_g0u
p'f%%#I
private static Sort[] impl=new Sort[]{ % /}WUP^H
new InsertSort(), B=X,7
new BubbleSort(), V&ot3- Rf
new SelectionSort(), C$9z
new ShellSort(), fD4ICO@
new QuickSort(), 0Fw6Dq<8-!
new ImprovedQuickSort(), q; jiw#_
new MergeSort(), ~n?>[88"
new ImprovedMergeSort(), (GcT(~Gq)D
new HeapSort() zhblLBpeE\
}; SDYv(^ f ,
}BJX/, H,
public static String toString(int algorithm){ X!tf#tl
return name[algorithm-1]; wRtZ`o
} /i_ @
rwE%G>Vb
public static void sort(int[] data, int algorithm) { =IjQ40W
impl[algorithm-1].sort(data); z@Hp,|Vy[
} [/ M`
U@F)2?
public static interface Sort { "TS
public void sort(int[] data); H'=(`
} e3(/qMl
6l\FIah@
public static void swap(int[] data, int i, int j) { :G5RYi
int temp = data; ',I0ih#Ls
data = data[j]; JC#>Td
data[j] = temp; .S?pG_n]f
} 89~ =eY
} RA O`i>@