[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; `5Kg[nB:
} s;OGb{H7
int i1=l; L?d?O
int i2=mid+1; rz%~=Ca2j
for(int cur=l;cur<=r;cur++){ :C} I6v=
if(i1==mid+1) lK=Is v+
data[cur]=temp[i2++]; j*?8w(!
else if(i2>r) Jq&Hz$L|
data[cur]=temp[i1++]; ,Zn6T"[$
else if(temp[i1] data[cur]=temp[i1++]; {kk%_q
else //2O#Fg{/
data[cur]=temp[i2++]; ?pW1}:z
} uS`}
} O>]i?
BJux5Nh
} F(ydqgH~a
HqW /
改进后的归并排序: .t1:;H b
A r]*?:4y[
package org.rut.util.algorithm.support; >fXtu:C-!J
qKfUm:7Q_
import org.rut.util.algorithm.SortUtil; eavn.I8J
:6nD"5(
/** qhGz2<}_j
* @author treeroot _HHvL=
* @since 2006-2-2 #kM|!U=
* @version 1.0 6T$=(I <4
*/ ,yltt+e
public class ImprovedMergeSort implements SortUtil.Sort { AyO%,6p[
i#*[, P~
private static final int THRESHOLD = 10; KBB)xez8
e^O:I
/* F;ttqL
* (non-Javadoc) r&4Xf#QD6
* =;0-t\w!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'r]6 GC8Z$
*/ [n[dr@J7v
public void sort(int[] data) { R BHDfm'~7
int[] temp=new int[data.length]; P!+Gwm{
mergeSort(data,temp,0,data.length-1); MT~^wI0a
} ]!{S2x&"
0 MK}
private void mergeSort(int[] data, int[] temp, int l, int r) { 5VTVx1P[8
int i, j, k; ~6t!)QATnp
int mid = (l + r) / 2; $vu*# .w
if (l == r) -n9&W
return; e&z@yy$
if ((mid - l) >= THRESHOLD) 0!3. .5==
mergeSort(data, temp, l, mid); T&'Jc
else ?A|JKOst]
insertSort(data, l, mid - l + 1); wPM>-F
if ((r - mid) > THRESHOLD) IQO|)53)
mergeSort(data, temp, mid + 1, r); >g{&Qx`&
else P_A@`eU0
insertSort(data, mid + 1, r - mid); dzOco)y
3LETzsJ
for (i = l; i <= mid; i++) { gvR]"h
temp = data; 6NX#=A
} Gf"TI:xa
for (j = 1; j <= r - mid; j++) { i"a3POV>
temp[r - j + 1] = data[j + mid]; nm1dd{U6^
} [L+*pW+$\.
int a = temp[l]; d78 [(;
int b = temp[r]; @6'~RD.
for (i = l, j = r, k = l; k <= r; k++) { VG 5*17nf5
if (a < b) { -rsbSt ?_
data[k] = temp[i++]; (Y)2[j
a = temp; OWewV@VXR
} else { lk 1\|Q I
data[k] = temp[j--]; &'>m;W
b = temp[j]; hEB5=~A_
} jV}8VK*`+
} Np+PUu>
} 5bt>MoKxv
z+yq%O
/** AZQQge
* @param data ?) y}HF
* @param l a|z-EKV
* @param i v](Y n)#
*/ ?{ExBZNa
private void insertSort(int[] data, int start, int len) { CO`)XB6W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )7*'r@
} wU+r]SK@
} 7G_<+rn
} J| N 6r
} <{cY2cx~3
6 ^3RfF^W
堆排序： o`c+eMwr(
~Tt@v`}
package org.rut.util.algorithm.support; ,5$G0
Fy{yg]O"
import org.rut.util.algorithm.SortUtil; rByth,|
vIJ5iLF
/** JhFn"(O
* @author treeroot -Rw3[4>@O"
* @since 2006-2-2 '*y(F*7+
* @version 1.0 j_2g*lQ7a
*/ TMMKRC1<
public class HeapSort implements SortUtil.Sort{ !=:>yWQ
\B4H0f
/* (non-Javadoc) id:,\iJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yo#r^iAr
*/ ] x)>q
public void sort(int[] data) { lV^#[%
MaxHeap h=new MaxHeap(); ndLEIqOY
h.init(data); u&Ic
for(int i=0;i h.remove(); p*c(dkOe8
System.arraycopy(h.queue,1,data,0,data.length); by>%}#M
} Z2M(euzfi3
+JtKVF
private static class MaxHeap{ k";dK*hD,
C!^A\T7p
void init(int[] data){ MOQ6&C`7q
this.queue=new int[data.length+1]; k3$'K}=d
for(int i=0;i queue[++size]=data; ,ho",y
fixUp(size); g,\kLTg
} .9vS4C
} F&6#j
bBs{PI2(p1
private int size=0; <CVX[R]U
Nx.9)MjI
private int[] queue; Nl YFS?5
"yw{A%J
public int get() { <)TIj6
return queue[1]; qkhre3
} s8,YQ5-
o)5zvnu7
public void remove() { @}4>:\es
SortUtil.swap(queue,1,size--); v,}C~L3
fixDown(1); n0l|7:Mk
} ?sQg{1"Zr
file://fixdown nZB~l=
private void fixDown(int k) { gg#9I(pX
int j; Ll=G+cw6P
while ((j = k << 1) <= size) { W~mo*EJ'^
if (j < size %26amp;%26amp; queue[j] j++; f)_<Ih\/7_
if (queue[k]>queue[j]) file://不用交换 LKvX~68
break; # QwX|x{
SortUtil.swap(queue,j,k); 6c]4(%8
k = j; @;eH~3P
} 6 EqN>.
} 3yRvs;nWS
private void fixUp(int k) { B7uK:J:c*H
while (k > 1) { 7#C$}1XJ1
int j = k >> 1; \L(jNN0_R
if (queue[j]>queue[k]) bWA_a]G
break; T@ESMPeU:X
SortUtil.swap(queue,j,k); k4$zM/ob
k = j; q+9^rQ
} x,^-a
} ZOfv\(iJ;
M@es8\&S.
} ~:JAWs$\V
bji#ID2]%
} {oY"CZ2
>Y4^<!\v
SortUtil： YA@?L!F
:4zPYG o
package org.rut.util.algorithm; lknj/i5L
%BC%fVdP
import org.rut.util.algorithm.support.BubbleSort; CfW#Wk:8J
import org.rut.util.algorithm.support.HeapSort; >e!J(4.-
import org.rut.util.algorithm.support.ImprovedMergeSort; dE8f?L'
import org.rut.util.algorithm.support.ImprovedQuickSort; #6c,_!
import org.rut.util.algorithm.support.InsertSort; SHYekX
import org.rut.util.algorithm.support.MergeSort; fwt+$`n
import org.rut.util.algorithm.support.QuickSort; ?jMM@O`Nu
import org.rut.util.algorithm.support.SelectionSort; !7\dr )
import org.rut.util.algorithm.support.ShellSort; 9QP=
h:bx0:O"
/** s;P _LaIp)
* @author treeroot }BS EK<W
* @since 2006-2-2 H%m^8yW1
* @version 1.0 X$==J St
*/ {P?Ge
public class SortUtil { VJ-t#q"
public final static int INSERT = 1; Po=:-Of:
public final static int BUBBLE = 2; ,9G'1%z,
public final static int SELECTION = 3; xytWE:=
public final static int SHELL = 4; H9jlp.F
public final static int QUICK = 5; {G=>WAXo
public final static int IMPROVED_QUICK = 6; 5(#z)T
public final static int MERGE = 7; 8-+# !]
public final static int IMPROVED_MERGE = 8; ]uhG&: }
public final static int HEAP = 9; $xW9))
GjEV]hqR
public static void sort(int[] data) { C4E}.``Hm
sort(data, IMPROVED_QUICK); aT2%Az@j
} xb[yy}>"L
private static String[] name={ R5b,/>^'A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MMjewGxe
}; ):G+*3yb
/|U;_F Pmc
private static Sort[] impl=new Sort[]{ +xIVlH9`Q
new InsertSort(), ;gEEdx'&T
new BubbleSort(), Q-h< av9
new SelectionSort(), ~uY5~Qs9G
new ShellSort(), t_I-6`8o]
new QuickSort(), nZj&Ma7R
new ImprovedQuickSort(), pDP* 3
new MergeSort(), 6$PQ$
new ImprovedMergeSort(), =^M Q 4
new HeapSort() ?_{{iil
}; TQt[he$O
d^?e*USh
public static String toString(int algorithm){ |oeg'T
return name[algorithm-1]; UBv#z&@[
} H '5zl^8I
-"yma_
public static void sort(int[] data, int algorithm) { /tkV/
impl[algorithm-1].sort(data); .vmCKZ
} ^&F.T-(A
g[b;1$
public static interface Sort { pPsTgGai
public void sort(int[] data); `Q+O#l?
} hHMp=8J7
h{yh}04P1
public static void swap(int[] data, int i, int j) { *@lVesC2
int temp = data; @?tR-L<u
data = data[j]; S5m.oHJI*
data[j] = temp; %[*_-%
} 4Vj]bm
} A5fzyG