[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; vzT6G/
} +k"8e?/e.
int i1=l; Q'V,?#
int i2=mid+1; w2mlqy2L
for(int cur=l;cur<=r;cur++){ ~wQ WWRk
if(i1==mid+1) ,4?|}xg
data[cur]=temp[i2++]; f+(w(~O
else if(i2>r) ZYp-dlEXq
data[cur]=temp[i1++]; 6!Ap;O^*
else if(temp[i1] data[cur]=temp[i1++]; ]q\=
else $DMu~wwfG
data[cur]=temp[i2++]; 3 %{'Uh,
} fn"jYSy
} H'(o}cn7~
_}%#Yz
} d%|#m)
X+G*Q}5
改进后的归并排序: &JzF
rD)v%vvr&`
package org.rut.util.algorithm.support; Ab|NjY:
L.~]qs|G/K
import org.rut.util.algorithm.SortUtil; h4xf%vA(;
YuZ
/** GA@Q:n8UuR
* @author treeroot "VOWV3Z
* @since 2006-2-2 V,%5 hl'&
* @version 1.0 pHbguoH,
*/ T<~[vjA
public class ImprovedMergeSort implements SortUtil.Sort { rcb/X`l=
T;e(Q,!H
private static final int THRESHOLD = 10; At_Y$N:
^)K[1]"uM
/* }qX&*DU_@
* (non-Javadoc) :a<TV9?H0
* Gb)iB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g KY ,G
*/ {xx;zjt%}}
public void sort(int[] data) { u+T, n
int[] temp=new int[data.length]; +as\>"Cj+2
mergeSort(data,temp,0,data.length-1); OX`GN#yl
} ])";Z
,,-3p#Pbw
private void mergeSort(int[] data, int[] temp, int l, int r) { [t\Mu}b
int i, j, k; ?ew]i'9(
int mid = (l + r) / 2; u,k8i:JY
if (l == r) ATkqzE`;
return; ^x#RUv
if ((mid - l) >= THRESHOLD) 8o!^ZOmU<
mergeSort(data, temp, l, mid); uy%PTi+A
else B_G7F[/K
insertSort(data, l, mid - l + 1); X-WvKH(=w
if ((r - mid) > THRESHOLD) {.)~4.LhQM
mergeSort(data, temp, mid + 1, r); 5~6y.S
else aQuy*\$$
insertSort(data, mid + 1, r - mid); >R0j<:p :
mM%BO(X{=
for (i = l; i <= mid; i++) { WkmS
temp = data; E8 )*HOT_T
} N8Q{4c
for (j = 1; j <= r - mid; j++) { Hs!CJ(0"y
temp[r - j + 1] = data[j + mid]; U9OF0=g
} ?5M2DLh~
int a = temp[l]; HC}C_Q5c91
int b = temp[r]; a"N_zGf2$
for (i = l, j = r, k = l; k <= r; k++) { Ct33S+y
if (a < b) { aDEP_b;
data[k] = temp[i++]; 9_dsiM7CT
a = temp; >b${rgCvQ
} else { \'b-;exH
data[k] = temp[j--]; /!3:K<6@
b = temp[j]; o8"xoXK5xf
} h2snGN/{Hb
} (]dZ+"O{
} GDntGTE~sk
o%7yhCY
/** zK;t041e
* @param data MeS$+9jV(
* @param l Hn.UJ4V
* @param i 'IszS!kY
*/ ShxX[k
private void insertSort(int[] data, int start, int len) { ;I'["k%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ybkN^OEJ
} exvsf|
} ^5F/=TtE G
} JASn\z
} ^)I:82"|?
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堆排序： aKO@_R,:
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package org.rut.util.algorithm.support; C]cw@:o%
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import org.rut.util.algorithm.SortUtil; st>t~a|T
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/** }% *g\%L
* @author treeroot ~E~J*R Ze
* @since 2006-2-2 =%`"
* @version 1.0 `}l%Am
*/ v2Y=vr
public class HeapSort implements SortUtil.Sort{ .}wir,
m~A/.t%=
/* (non-Javadoc) kzu=-@s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &2J|v#$F
*/ !T)>q%@ai
public void sort(int[] data) { b :00w["
MaxHeap h=new MaxHeap(); u1l#k60
h.init(data); TrW3@@}j
for(int i=0;i h.remove(); !/SFEL@_B
System.arraycopy(h.queue,1,data,0,data.length); YzqhFFaj.
} i^(<E0vS
ikC;N5Sw
private static class MaxHeap{ &V$R@~x
ewY X\
void init(int[] data){ iuEdm:pW
this.queue=new int[data.length+1]; tti.-
for(int i=0;i queue[++size]=data; n>'}tT)U
fixUp(size); _=b[b]Ec$s
} RD^o&VXO
} "d'@IN
;A_QI>>
private int size=0; p5\b&~ g
(iFhn*/ E
private int[] queue; qM)^]2_-
Qa=;Elp:[
public int get() { P<1zXs.H
return queue[1]; n"JrjvS
} -9mh|&z`
ZyG528O22
public void remove() { (`&g
SortUtil.swap(queue,1,size--); O;~1M3Ii
fixDown(1); yI!K quMC
} DIY WFVh
file://fixdown =B\?(
private void fixDown(int k) { j<[<qU:
int j; V>hy5hDpH
while ((j = k << 1) <= size) { ^t"\PpmK<d
if (j < size %26amp;%26amp; queue[j] j++; {,m!%FDL
if (queue[k]>queue[j]) file://不用交换 Z`D#L[z$
break; Cpl\}Qn
SortUtil.swap(queue,j,k); 8r5j~Df
k = j; Lt)t}0
} $ _zdjzT
} (Q@+W|~
private void fixUp(int k) { TSOt$7-
while (k > 1) { [30< 0
int j = k >> 1; +XsY*$O
if (queue[j]>queue[k]) 0F"xU1z,
break; _\[Zr.y
SortUtil.swap(queue,j,k); &{>~|^
k = j; rl4-nA
} a 3HS!/
} =T1i(M#
Y!KGJ^.mF
} LWY`J0/
,E_hG3}}
} O!a5
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SortUtil： BQm H9g|2
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package org.rut.util.algorithm; +s`n]1HC
T^"d%au
import org.rut.util.algorithm.support.BubbleSort; >4;A(s`
import org.rut.util.algorithm.support.HeapSort; )ZT&V I
import org.rut.util.algorithm.support.ImprovedMergeSort; bH&[O`vf
import org.rut.util.algorithm.support.ImprovedQuickSort; vJYy`k^Y
import org.rut.util.algorithm.support.InsertSort; )J0'We
import org.rut.util.algorithm.support.MergeSort; $v+g3+7
import org.rut.util.algorithm.support.QuickSort; vsc&$r3!5{
import org.rut.util.algorithm.support.SelectionSort; rK];2[U
import org.rut.util.algorithm.support.ShellSort; Fd2zvi
z*:^*,
/** C6GYhG]
* @author treeroot AE@*#47
* @since 2006-2-2 \i{=%[c
* @version 1.0 BONM:(1
*/ /QTGZb
public class SortUtil { __)9JF
public final static int INSERT = 1; B;^7Yu0,
public final static int BUBBLE = 2; FX\ -Y$K
public final static int SELECTION = 3; ++xEMP)
public final static int SHELL = 4; Dk:Zeo]+my
public final static int QUICK = 5; !IP[C?(nB
public final static int IMPROVED_QUICK = 6; `6UW?1_Z5
public final static int MERGE = 7; zL1H[}[z+
public final static int IMPROVED_MERGE = 8; LTrn$k3}
public final static int HEAP = 9; ! XA07O[@
o <sX6a9e
public static void sort(int[] data) { V"gnG](2l
sort(data, IMPROVED_QUICK); 2Ui)'0
} je.mX/Lpj
private static String[] name={ `XQM)A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9;kWuP>k4u
}; }*;Hhbox
C)Mh
private static Sort[] impl=new Sort[]{ jRzR`>5
new InsertSort(), Ot5 $~o
new BubbleSort(), LDO@$jg
new SelectionSort(), ^BW V6
new ShellSort(), $f_Brc:n {
new QuickSort(), 8z\WyDz
new ImprovedQuickSort(), db4Ol=
new MergeSort(), ,0;E_i7
new ImprovedMergeSort(), Qr$uFh/y
new HeapSort() BHqJ~2&FDW
}; zAS&L%^tV
\%f4)Qb
public static String toString(int algorithm){ >PfYHO
return name[algorithm-1]; (yn!~El3
} ybcQ,e
Lr_+)l
public static void sort(int[] data, int algorithm) { Ggsfr;m\`
impl[algorithm-1].sort(data); >cQ*qXI0
} (WX,&`a<$
UPA))Iv>
public static interface Sort { BB>3Kj:|
public void sort(int[] data); "EDn;l-Q
} 3L/>=I{5
OANn!nZ.
public static void swap(int[] data, int i, int j) { fo^M`a!va0
int temp = data; %BC*h}KGH
data = data[j]; 79z(n[^
data[j] = temp; +3!um
} 0'%R@|
} !zVuO*+