[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; v\$XhOK
} |hOqz2|
int i1=l; 2$\Du9+
int i2=mid+1; Z+I[
for(int cur=l;cur<=r;cur++){ XW5r@:e
if(i1==mid+1) mbJ#-^}V
data[cur]=temp[i2++]; mZMLDs:
else if(i2>r) j"}alS`-
data[cur]=temp[i1++]; 7QQ1oPV
else if(temp[i1] data[cur]=temp[i1++]; ~`8`kk8
else f<0-'fGJd
data[cur]=temp[i2++]; /of,4aaK7
} X(g<rz1J]
} 7&|fD{:4U
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} @0n #Qs|E!
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改进后的归并排序: L{<E'#@F
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package org.rut.util.algorithm.support; Jq/([
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import org.rut.util.algorithm.SortUtil; vTP'\^;
B5J=q("P
/** cz&FOP+!
* @author treeroot Wa,[#H
* @since 2006-2-2 *8X: fq
* @version 1.0 *gVRMSrx4
*/ F0Rk[GM
public class ImprovedMergeSort implements SortUtil.Sort { QJ>+!p*
w9c
private static final int THRESHOLD = 10; eX;"kO
R &T(S
/* 80axsU^H0
* (non-Javadoc) OC"W=[Myl
* u=RF6V|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a?\ Au
*/ `')3}
public void sort(int[] data) { au0)yg*V1
int[] temp=new int[data.length]; F9-xp7T
mergeSort(data,temp,0,data.length-1); LT#*nr
} NqlG=pu
6S<J'9sE
private void mergeSort(int[] data, int[] temp, int l, int r) { CXvL`d"
int i, j, k; sq-[<ryk
int mid = (l + r) / 2; ks:Z=%o
if (l == r) 80 i<Ij8J
return; 9M<qk si
if ((mid - l) >= THRESHOLD) a:v&pj+|<
mergeSort(data, temp, l, mid); G|IO~o0+
else W[w8@OCNf
insertSort(data, l, mid - l + 1); kCLz@9>FQ
if ((r - mid) > THRESHOLD) $WrDZU 2z
mergeSort(data, temp, mid + 1, r); ]"{K5s7
else WPpl9)Qc
insertSort(data, mid + 1, r - mid); |u7vY/
9q;+ Al^Z
for (i = l; i <= mid; i++) { O .m;a_
temp = data; -~]*)&
} "*XR'9~7
for (j = 1; j <= r - mid; j++) { 2c_#q1/Z/
temp[r - j + 1] = data[j + mid]; ()=
} Rco#?'
int a = temp[l]; $Rd74;edn
int b = temp[r]; K"#np!Y)
for (i = l, j = r, k = l; k <= r; k++) { ^)D[ W(*
if (a < b) { \C~Y
data[k] = temp[i++]; pDrM8)r
a = temp; FF)F%o+:w
} else { !T#~.QP4
data[k] = temp[j--]; D CcM~
b = temp[j]; ]'EtLFv)
} =Y?M#3P.I
} s+h`,gg9
} u-f_,],p
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/** gj0gs
* @param data aS-rRL|\L
* @param l BD\xUjd?)Q
* @param i TmvI+AY/
*/ sas;<yh
private void insertSort(int[] data, int start, int len) { (/-2bO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /{."*jK
} A<ur20
} @M?;~M?B]J
} cX9 !a,
} 4 B"tz!
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堆排序： &S>m+m'
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package org.rut.util.algorithm.support; H3H3UIIT_
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import org.rut.util.algorithm.SortUtil; z v*hA/
J/:9;{R
/** ^dJ/>?1
* @author treeroot K|[[A)tt6
* @since 2006-2-2 "\Zsr6y
* @version 1.0 UpF,e>s
*/ XkDjA#nx`
public class HeapSort implements SortUtil.Sort{ PxhB=i!'$
kXFgvIpg<
/* (non-Javadoc) 1 `hj]@.]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $8kc1Q
*/ G&I\Za;
public void sort(int[] data) { C4H M
MaxHeap h=new MaxHeap(); y)0r%=
h.init(data); vUk <z*
for(int i=0;i h.remove(); 5A g4o
System.arraycopy(h.queue,1,data,0,data.length); [y7BHikX)
} LBh|4S$K
O-[lL"T
private static class MaxHeap{ u]lf~EE
_DnZ=&=MA
void init(int[] data){ sOhQu>gN
this.queue=new int[data.length+1]; 8J-$+ ;
for(int i=0;i queue[++size]=data; 56Z 1jN^U
fixUp(size); 5(W`{{AW
} ]vo&NE
} .bE+dA6:v
9+k7x,
private int size=0; Q x}\[
:s`~m;Y9?
private int[] queue; JKN0:/t7Q
i0; p?4`m
public int get() { Xxhzzm-B
return queue[1]; 5v >0$Y{
} ca%s$' d
,Dd )=
public void remove() { -LI^(_
SortUtil.swap(queue,1,size--); fTQRn
fixDown(1); 1AiqB Rs
} FRqJ#yd]
file://fixdown Q}zAC2@L
private void fixDown(int k) { 7DQ{#Gf#G
int j; AJ1(q:P
while ((j = k << 1) <= size) { <mN.6@*{
if (j < size %26amp;%26amp; queue[j] j++; fn(< <FA)
if (queue[k]>queue[j]) file://不用交换 O75^(keW
break; ~IrrX,mp:
SortUtil.swap(queue,j,k); tl5}#uJ
k = j; M#ED49Dh>
} /o%J /|
} .hO) R.
private void fixUp(int k) { [\+"<;m$
while (k > 1) { aly1=j
int j = k >> 1; 9+><:(,
if (queue[j]>queue[k]) bWU4lPfP
break; 7:iTx;,v
SortUtil.swap(queue,j,k); lAYyxG#
k = j; EMK>7 aks
} ai|d`:;
} #( G>J4E,
JAEn 72
} J" :R,w`
sv}k_6XgY
} m+&)eQ:
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SortUtil： a@+n
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package org.rut.util.algorithm; SbrKNADH%
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import org.rut.util.algorithm.support.BubbleSort; vSyR% j
import org.rut.util.algorithm.support.HeapSort; NW$_w
import org.rut.util.algorithm.support.ImprovedMergeSort; "}/$xOl"
import org.rut.util.algorithm.support.ImprovedQuickSort; W#^W1j>_G
import org.rut.util.algorithm.support.InsertSort; F`C$F!GE
import org.rut.util.algorithm.support.MergeSort; f&5'1tG
import org.rut.util.algorithm.support.QuickSort; 4o|-v
import org.rut.util.algorithm.support.SelectionSort; p>9-Ga
import org.rut.util.algorithm.support.ShellSort; YC,)t71l{
QV&yVH=Xs
/** kx3?'=0;5
* @author treeroot yxz)32B?
* @since 2006-2-2 TDqH"q0
* @version 1.0 9|('*
*/ Qg^Ga0Lf6
public class SortUtil { [9c|!w^F
public final static int INSERT = 1; ^"
public final static int BUBBLE = 2; {`KRr:w
public final static int SELECTION = 3; Y:;]qoF
public final static int SHELL = 4; m@A?'gD
public final static int QUICK = 5; (-e*xM m
public final static int IMPROVED_QUICK = 6; *{K?JB#W
public final static int MERGE = 7; #gQaNc?
public final static int IMPROVED_MERGE = 8; 7~f"8\
public final static int HEAP = 9; V DN@=/
[>MPM$9F-m
public static void sort(int[] data) { kuX{2h*`
sort(data, IMPROVED_QUICK); |L}1@0i
} #?^%#"~4H
private static String[] name={ +xL*`fn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W08rGY
}; iCZuE:I1K,
VMZUJ2Yj/&
private static Sort[] impl=new Sort[]{ iL48
new InsertSort(), |mS-<e8LY4
new BubbleSort(), (H[.\O-`
new SelectionSort(), p)k5Uh"
new ShellSort(), l>t0 H($
new QuickSort(), C)z?-f
new ImprovedQuickSort(), R?Ou=p .
new MergeSort(), FdcmA22k*
new ImprovedMergeSort(), m|by^40A(
new HeapSort() @ =XJ<
}; rm5@dM@
0nu&JQ
public static String toString(int algorithm){ ZR[6-
return name[algorithm-1]; s~tZN
} -TT{4\%s
>U9JbkeF
public static void sort(int[] data, int algorithm) { "?n;dXYSi
impl[algorithm-1].sort(data); +YFAZv7`
} }fqy vI
tupAU$h?!
public static interface Sort { C&/_mm5
public void sort(int[] data); AK_,$'f
} ]ME2V
.`TDpi9OB
public static void swap(int[] data, int i, int j) { mr[+\ 5
int temp = data; v"v-c!k
data = data[j]; v~AD7k2{8
data[j] = temp; kBlk^=h<:w
} :< *xG&
} 8iwH^+h~