[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; +'gO%^{l
} D^O[_/i&
int i1=l; r]cq|Nv8:
int i2=mid+1; + GQ{{B
for(int cur=l;cur<=r;cur++){ \0 h>!u
if(i1==mid+1) PI%l
data[cur]=temp[i2++]; G@ot^n3
else if(i2>r) K_L7a>Fr
data[cur]=temp[i1++]; HI|egf@
else if(temp[i1] data[cur]=temp[i1++]; y%%VJ}'X!
else 0'*{BAWx
data[cur]=temp[i2++]; Kt*b) <
} 7I w^
} Mu`_^gG
m]U
} K>.}>)0
wX)'1H):T
改进后的归并排序: ^V;r
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package org.rut.util.algorithm.support; &_Cc
E8kD#tL
import org.rut.util.algorithm.SortUtil; ?@@$)2_*u
ktqFgU#rT
/** Te}gmt+#%
* @author treeroot Ux',ma1JK
* @since 2006-2-2 HqV55o5f'
* @version 1.0 -x6_HibbD
*/ )XonFI
public class ImprovedMergeSort implements SortUtil.Sort { -5og)ZGVUA
ek5j;%~g1
private static final int THRESHOLD = 10; E7h@Y~bNhW
g0biw?
/* aK6dy\
* (non-Javadoc) e:-pqZT`
* 4S4MQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r+%3Y:dZE
*/ ?84f\<"
public void sort(int[] data) { g5 *E\T%8
int[] temp=new int[data.length]; U*K4qJ6U
mergeSort(data,temp,0,data.length-1); y'>9'/&
} *j83E[(]
][Tw^r&
private void mergeSort(int[] data, int[] temp, int l, int r) { A ,0}bFK
int i, j, k; Nz{qu}dt
int mid = (l + r) / 2; :fRta[
if (l == r) uYs45 G
return; oD2! [&
if ((mid - l) >= THRESHOLD) h-(NWxK+
mergeSort(data, temp, l, mid); >j]Gz-wC
else hH>a{7V
insertSort(data, l, mid - l + 1); -TH(Z(pB
if ((r - mid) > THRESHOLD) .DwiIr'
mergeSort(data, temp, mid + 1, r); uh9b!8
else m-C#~Cp36
insertSort(data, mid + 1, r - mid); )ty>{t
&/' O?HWl
for (i = l; i <= mid; i++) { |;V-;e*
temp = data; 9BOn8p;yz
} FDiDHOR
for (j = 1; j <= r - mid; j++) { W1o6Sh8v(
temp[r - j + 1] = data[j + mid]; L6qK3xa}
} &9v8
int a = temp[l]; 1l}Am>}
int b = temp[r]; 3k_\xQ
for (i = l, j = r, k = l; k <= r; k++) { 1F0];{a
if (a < b) { ?zsRs?rc0
data[k] = temp[i++]; \A!Iln
a = temp; "<^ Vp-7r
} else { n~>b}DY
data[k] = temp[j--]; 0ZL>-
b = temp[j]; v8uUv%Hkd
} "E5=AWd
} jfvlkE-uK
} 9-A@2&J1
"j&p3
/** pR*3Q@Ng
* @param data <#Fex'4
* @param l #\="^z6
* @param i ^LSD_R^N
*/ UK8k`;^KI
private void insertSort(int[] data, int start, int len) { `"~X1;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1-4[w *u>
} Uq%|v
} )zP"Uuu
} &&}c R:U,
} )i-`AJK-'v
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堆排序： JO87rG
su-0G?c
package org.rut.util.algorithm.support; $Ixd;`l*
k]TJL9Q
import org.rut.util.algorithm.SortUtil; phwq#AxQ
!P6y_Frpe
/** Gv(n2r
* @author treeroot t!ZFpMv]n
* @since 2006-2-2 [h\_yU[P
* @version 1.0 ybB<AkYc
*/ @:9mTP7
public class HeapSort implements SortUtil.Sort{ 3 }rx(
!\&4,l(
/* (non-Javadoc) q 7+|U%!9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A_6Dol=J@
*/ ,6U=F#z
public void sort(int[] data) { 8HSGOs =8
MaxHeap h=new MaxHeap(); =4x-x nA
h.init(data); 4T<dI6I0
for(int i=0;i h.remove(); KkHlMwv
System.arraycopy(h.queue,1,data,0,data.length); XoiZ"zE
} AkqGk5e ^
C4C!-12
private static class MaxHeap{ `,wX&@sN
'ka"0~:NS{
void init(int[] data){ Q[Tbdc%1EG
this.queue=new int[data.length+1]; o\yqf:V8
for(int i=0;i queue[++size]=data; K;f=l5
fixUp(size); "w{,ndZ
} ~HgN'#Y?
} bNz2Uo!0K
jM(!!AjpC
private int size=0; <=~'Pd-f(
S>?B)
private int[] queue; EY!P"u;
=~QC)y_
public int get() { c6pGy%T-
return queue[1]; ?x =Sm|Ej
} qv+}|+aL:
0EP8MRSR
public void remove() { V=H}Ecd
SortUtil.swap(queue,1,size--); X<$8'/p r
fixDown(1); ~f%AbDye
} x1*@PiO,.
file://fixdown p/uOCQ|1l
private void fixDown(int k) { m-!z(vcn
int j; 2$%0~Z5
while ((j = k << 1) <= size) { &@xeWB
if (j < size %26amp;%26amp; queue[j] j++; A,#hYi=-,
if (queue[k]>queue[j]) file://不用交换 / k8;k56
break; EC|b7
SortUtil.swap(queue,j,k); bYH! P/
k = j; lf9_!`DGV
} Th//uI+
} 3#T_(
private void fixUp(int k) { h?:Y\DlU'
while (k > 1) { [?`c>
int j = k >> 1; tlFc+3
if (queue[j]>queue[k]) 8M'6Kcr
break; ETVT.R8
SortUtil.swap(queue,j,k); gBG.3\[
k = j; Kq0hT4w
} |]H2a;vUJR
} f?C !Br}
JZ=a3)x"
} 57b;{kl
0IM#T=V
} |"Oazll
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SortUtil： CQ3{'"b
5+O#5"v_
package org.rut.util.algorithm; tgYIM`f
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import org.rut.util.algorithm.support.BubbleSort; b\\?aR |
import org.rut.util.algorithm.support.HeapSort; .ODtduURe
import org.rut.util.algorithm.support.ImprovedMergeSort; /(nA)V( :
import org.rut.util.algorithm.support.ImprovedQuickSort; f i!wrvO
import org.rut.util.algorithm.support.InsertSort; 9aC>gye!
import org.rut.util.algorithm.support.MergeSort; V*'9yk"
import org.rut.util.algorithm.support.QuickSort; ;@d<*
import org.rut.util.algorithm.support.SelectionSort; |R*fw(=W
import org.rut.util.algorithm.support.ShellSort; 3)g1e=\i$
sEvJ!$Tt?I
/** ^HL#)fK2I
* @author treeroot uj/le0
* @since 2006-2-2 Qzh:*O
* @version 1.0 n5]<|>Uvx
*/ Z?hBn`.
public class SortUtil { nw5#/5xw
public final static int INSERT = 1; oa1a5+A
public final static int BUBBLE = 2; ]@?3,N
public final static int SELECTION = 3; a3lo;Cfp
public final static int SHELL = 4; WuGm~<NS
public final static int QUICK = 5; Y!*,G]7
public final static int IMPROVED_QUICK = 6; [bT@Y:X@`
public final static int MERGE = 7; up2%QbN(
public final static int IMPROVED_MERGE = 8; TPEZ"%=Hg
public final static int HEAP = 9; ]aakEU
uV 6f~cQ
public static void sort(int[] data) { ld@f:Zali
sort(data, IMPROVED_QUICK); yMSRUQ x
} w6"LHy[
private static String[] name={ *BO4"3Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )sS<%Xf
}; Jc%>=`f
sy@k3wQ
private static Sort[] impl=new Sort[]{ .D>lv_kp
new InsertSort(), !7^He3
new BubbleSort(), <0LB]zDWe6
new SelectionSort(), yauP j&^R
new ShellSort(), vo(?[[
new QuickSort(), v S+~4Q41
new ImprovedQuickSort(), sw@2 ?+
new MergeSort(), TwhK>HN
new ImprovedMergeSort(), YJ6vyG>%C
new HeapSort() BA>0 +
}; AeJM[fCMa
V[bc-m
public static String toString(int algorithm){ Em]T.'y
return name[algorithm-1]; nRE}F5k
} QJE-$ :
M!jW=^\
public static void sort(int[] data, int algorithm) { qlxW@|
impl[algorithm-1].sort(data); Yptsq@s
} &Egn`QU
[:=[QlvV
public static interface Sort { AP7W)S
public void sort(int[] data); #<e7 Y0
} jlP7'xt1%
A X#!9-m3
public static void swap(int[] data, int i, int j) { F@lpjW
int temp = data; 2r0!h98
data = data[j]; &zd7t6
data[j] = temp; *u>\&`h=
} iLgt_@g
} &}$D[ 4N