[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; Ac|IBXGa=
} t*~V]wZ
int i1=l; qf7lQovK
int i2=mid+1; vEk jd#
for(int cur=l;cur<=r;cur++){ >`SIB; &>j
if(i1==mid+1) *#w+*ywVZH
data[cur]=temp[i2++]; {IJ,y27
else if(i2>r) GeD^-.^
data[cur]=temp[i1++]; ymiOtA Z
else if(temp[i1] data[cur]=temp[i1++]; *6?h,Dt L
else Wyd,7]'z)Z
data[cur]=temp[i2++]; ".Luc7
} FQ26(.
} *xI0hFJIM
t32 FNg
} qlNK }
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改进后的归并排序: '1_CMr
~*@UQ9*p#
package org.rut.util.algorithm.support; ^9UKsy/q
v=R=K
import org.rut.util.algorithm.SortUtil; TFjb1a,)
3dTz$s/[
/** ]nY,%XE
* @author treeroot +`>Tuz~
* @since 2006-2-2 ^"STM'Zh
* @version 1.0 | U)
*/ _8P0iC8Zg#
public class ImprovedMergeSort implements SortUtil.Sort { qwM71B!r
Nr8#/H2f
private static final int THRESHOLD = 10; B>hf|.GI
B+:/!_
/* 3copJS
* (non-Javadoc) pyJY]"UHVE
* Cdg/wRje
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MH7 n@.t
*/ wVX]"o
public void sort(int[] data) { H0r@dn
int[] temp=new int[data.length]; z3x/Y/X$S
mergeSort(data,temp,0,data.length-1); C@1B?OfJ
} 0N>NX?r
wyJ+~
private void mergeSort(int[] data, int[] temp, int l, int r) { EIQ`?8KSR
int i, j, k; cuzU*QW"g
int mid = (l + r) / 2; X?whyD)vE@
if (l == r) -|V1A[
return; [}:;B$,
if ((mid - l) >= THRESHOLD) p?rh+0wgX
mergeSort(data, temp, l, mid); L8R{W0Zr>!
else cip5 -Z@8
insertSort(data, l, mid - l + 1); y``[CBj
if ((r - mid) > THRESHOLD) GYH{_Fq
mergeSort(data, temp, mid + 1, r); ;GQCq@)-
else *WMI<w~_
insertSort(data, mid + 1, r - mid); x9\z^GU%H
69< <pm,m
for (i = l; i <= mid; i++) { !r^fX=X>'
temp = data; o0ky]9 P
} Ck1{\=t
for (j = 1; j <= r - mid; j++) { (-S\%,hO
temp[r - j + 1] = data[j + mid]; u-</G-y
} 4,EX2
int a = temp[l]; "qh~wKJ
int b = temp[r]; R` g'WaDk
for (i = l, j = r, k = l; k <= r; k++) { m4\e`nl
if (a < b) { "t0l)P*C}
data[k] = temp[i++]; OTe h8h
a = temp; V_\9t8
} else { ~dXiyU,y2
data[k] = temp[j--]; A4{14Y;?
b = temp[j]; 2`dKnaF|
} O}s Mqh
} !#y_vz9
} VEsIhjQ
wE~&Y?^
/** 8yCt(ms
* @param data (jmF7XfU
* @param l PPAcEXsIu
* @param i H~$*R7~
*/ RE0ud_q2
private void insertSort(int[] data, int start, int len) { 56JxHQu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3QI.|;X
} !P8Y(i
} jhR`%aH4
} k'8tqIUN]
} icK>|
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堆排序： tp<v
3p1U,B}
package org.rut.util.algorithm.support; 3d`u!i?/
u']}Z%A9`
import org.rut.util.algorithm.SortUtil; DuQW?9^232
1'B&e)
/** 8|L;y[v
* @author treeroot &j}:8Tst
* @since 2006-2-2 0^3n#7m;K
* @version 1.0 ?WP*At0
*/ +mPVI
public class HeapSort implements SortUtil.Sort{ }Y"vUl_I2
@?JFqwq!
/* (non-Javadoc) B ({g|}|G+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8S` j6
*/ vw6>eT
public void sort(int[] data) { {TXfi'\
MaxHeap h=new MaxHeap(); S2jn pf}
h.init(data); 4L bll%[9
for(int i=0;i h.remove(); 0`/CoP<U
System.arraycopy(h.queue,1,data,0,data.length); TKp2C5bX
} <v6W l\
EQtYb"_
private static class MaxHeap{ :b0|v`FU
I5@8=rFk
void init(int[] data){ NTo[di\_
this.queue=new int[data.length+1]; ;i?rd f
for(int i=0;i queue[++size]=data; 7,s5Gd-
fixUp(size); G0A\"2U
} >,ABE2t5
} |>RNIJ]
LGK&&srJs
private int size=0; J4x|Afp
)Ma/]eZ^I
private int[] queue; mp)+wZAN&
/}/GK|tj
public int get() { &hUEOif
return queue[1]; |- <72$j
} 1Va=.#<
G8zbb
public void remove() { Wecxx^vtv6
SortUtil.swap(queue,1,size--); ,D'm#Fti
fixDown(1); |c>.xt~
} 0(>3L:
file://fixdown ,^7]F"5
private void fixDown(int k) { W^7yh&@lU
int j; &2Ef:RZF
while ((j = k << 1) <= size) { b0/YX@
if (j < size %26amp;%26amp; queue[j] j++; 7GTDe'T
if (queue[k]>queue[j]) file://不用交换 *+XiBho
break; hQ}_(F_H
SortUtil.swap(queue,j,k); dBwoAq`'
k = j; [mQdc?n\
} L?Ys(a"k
} 5KfrkZ
private void fixUp(int k) { E0x\h<6W~
while (k > 1) { ,!,tU7-H
int j = k >> 1; l,~`o$_
if (queue[j]>queue[k]) puLgc$?
break; 9Z }<H/q
SortUtil.swap(queue,j,k); (S4HU_,88
k = j; f5p/cUzX
} 3yw$<lm
} NMQG[py!f
=av0a!
} |Y8}*C\M.h
5F!Qn\{u{
} 6O,:I
%%/8B
SortUtil： 9^9-\DG
cly}[<w!
package org.rut.util.algorithm; [V>s]c<4`o
m)LI| v
import org.rut.util.algorithm.support.BubbleSort; h@Jg9AM
import org.rut.util.algorithm.support.HeapSort; b;{"@b,Y
import org.rut.util.algorithm.support.ImprovedMergeSort; //;(KmU9
import org.rut.util.algorithm.support.ImprovedQuickSort; $2,tT;50g
import org.rut.util.algorithm.support.InsertSort; yXoNfsv
import org.rut.util.algorithm.support.MergeSort; E .28G2&
import org.rut.util.algorithm.support.QuickSort; K a& 2>F
import org.rut.util.algorithm.support.SelectionSort; @?3^Ks_
import org.rut.util.algorithm.support.ShellSort; i]N<xcF9N*
U[|5:qWs
/** gL-kI*Ra
* @author treeroot Q"B8l[
* @since 2006-2-2 ^EKRbPA9:<
* @version 1.0 6PYm?i=p?
*/ %)r:!R~R
public class SortUtil { _"Z?O)d*
public final static int INSERT = 1; 2m]4
public final static int BUBBLE = 2; .ARM~{q6)@
public final static int SELECTION = 3; NmXRA(m
public final static int SHELL = 4; ,(a~vqNQW3
public final static int QUICK = 5; Zs{7km
public final static int IMPROVED_QUICK = 6; K#N9N@WjR
public final static int MERGE = 7; Y,GlAr s4
public final static int IMPROVED_MERGE = 8; B`<}YVA
public final static int HEAP = 9; vPGUE`!D+
-seLa(8F
public static void sort(int[] data) { vanV|O
sort(data, IMPROVED_QUICK); Y.) QNTh
} ;y. ;U#O
private static String[] name={ 5I,NvHD4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i+qg*o$
}; auc:|?H~1n
#O!2
private static Sort[] impl=new Sort[]{ #h^nvRmON
new InsertSort(), f|M^UHt8*
new BubbleSort(), zn 0y`9!n?
new SelectionSort(), =.;ib6M
new ShellSort(), ;akW i]
new QuickSort(), B)[RIs
new ImprovedQuickSort(), Qw5(5W[L
new MergeSort(), oJ %Nt&q
new ImprovedMergeSort(), 9#9bm
new HeapSort() F<4:P=
}; MKvmzLh$)
O5vfcX4>
public static String toString(int algorithm){ ?wPTe^Qtv
return name[algorithm-1]; V\x'w*FP
} s|H7;.3gp
G#e]J;
public static void sort(int[] data, int algorithm) { d@g29rs
impl[algorithm-1].sort(data); K=o {
} eu"m0Q
&_-=(rK
public static interface Sort { B G\)B
public void sort(int[] data); 3'kKbrk [
} {Kr}RR*{X
G gA:;f46
public static void swap(int[] data, int i, int j) { U ->vk{v
int temp = data; M j[+h|e
data = data[j]; rhQ+ylt8I
data[j] = temp; Yg '(
} lqv}~MC
} 1aO(+](;