[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; _ev^5`>p/
} :|g{gi
int i1=l; Z8W<RiR
int i2=mid+1; )_uK(UNZ5
for(int cur=l;cur<=r;cur++){ ~jaGf
if(i1==mid+1) E {MSi"
data[cur]=temp[i2++]; \<%a`IA!*
else if(i2>r) [+GG Wo
data[cur]=temp[i1++]; f&|SGD*
else if(temp[i1] data[cur]=temp[i1++]; 5P4>xv[
else CT : ac64
data[cur]=temp[i2++]; zc"eSy< w$
} LY MfoXp
} +}n]A^&I\E
i F Ab"VA
} \BDNF<_
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改进后的归并排序: qJ!xhf1
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package org.rut.util.algorithm.support; -T>`PJpJuL
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import org.rut.util.algorithm.SortUtil; MX34qJ9k
H>B:jJf
/** sXUM,h8$!+
* @author treeroot 2r[,w]
* @since 2006-2-2 UkUdpZ.[il
* @version 1.0 C`ok{SNtUy
*/ Hd:ZE::Q'#
public class ImprovedMergeSort implements SortUtil.Sort { "6ZatRUd
.d2s4q\
private static final int THRESHOLD = 10; +W}f0@#)<
l\eq/yg_
/* f%af.cR*
* (non-Javadoc) rRMC<.=
* vDemY"wz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YG%Zw
*/ 0y(d|;':
public void sort(int[] data) { qxq ~9\My
int[] temp=new int[data.length]; `]Xbw^Y'x
mergeSort(data,temp,0,data.length-1); q7;)&_'
} ~ rRIWfhb
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private void mergeSort(int[] data, int[] temp, int l, int r) { 6^p6v
int i, j, k; L6FUC6x"
int mid = (l + r) / 2; r8qee$^M
if (l == r) 607#d):Y
return; 6^~&sA
if ((mid - l) >= THRESHOLD) 0-@waK
mergeSort(data, temp, l, mid); Z^sO`C
else jE{z4en
insertSort(data, l, mid - l + 1); q>Y_I<;'g
if ((r - mid) > THRESHOLD) ?#W>^Za=
mergeSort(data, temp, mid + 1, r); kn!J`"b
else T+\BX$w/4e
insertSort(data, mid + 1, r - mid); PW}Yts7p
g\ke,r6
for (i = l; i <= mid; i++) { ]fR 3f
temp = data; V!oyC$eV
} `jJb) z3D
for (j = 1; j <= r - mid; j++) { :Qf^@TS}O
temp[r - j + 1] = data[j + mid]; 6D$xG"c
} l|DOsI'r
int a = temp[l]; cu Nwv(P
int b = temp[r]; "k+QDQ3=
for (i = l, j = r, k = l; k <= r; k++) { P)T:6K
if (a < b) { LNj|t)Ov
data[k] = temp[i++]; bBZvL
a = temp; JL<}9K
} else { CxO)d7c
data[k] = temp[j--]; X%;,r 2g
b = temp[j]; .AKx8=f
} 3M^ /
} <4Ak$E%"
} ?)9 6YX'
Dj[D|%9a
/** M+Dkn3bx
* @param data Ouj5NL
* @param l ;$86.2S>B
* @param i 9AS,-5;XQ
*/ k|w6&k3
private void insertSort(int[] data, int start, int len) { j@9A!5<CCk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }!2|*Y
} L,R9jMx?_
} LG;xZQx'
} p{.EFa>H
} FC(m)S2
RVD=CX
堆排序： rt"\\sOlMB
fz:F*zT1
package org.rut.util.algorithm.support; P afmHXx
'Y[\[]3[8
import org.rut.util.algorithm.SortUtil; -2f0CAh~
m0 `wmM
/** k%hif8y
* @author treeroot /H\ZCIu/7
* @since 2006-2-2 o'W &gkb9
* @version 1.0 $?0<rvGJ
*/ 1y 6H2
public class HeapSort implements SortUtil.Sort{ ~,ac{%8x
7^S&g.A
/* (non-Javadoc) D|OX]3~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SMnbI.0
*/ w2 CgEJ%
public void sort(int[] data) { U,)+wZJ
MaxHeap h=new MaxHeap(); N!hp^V<7
h.init(data); t0?\5q
for(int i=0;i h.remove(); .NZ_dz$c
System.arraycopy(h.queue,1,data,0,data.length); W(EU*~<UC
} <>p\9rVp*^
R D)dw
private static class MaxHeap{ ^5xY&1j
P[^!Uq[0n7
void init(int[] data){ V<+d o|@F
this.queue=new int[data.length+1]; ([s2F%S`@
for(int i=0;i queue[++size]=data; >&p_G0-
fixUp(size); #t9&X8:U
} IA''-+9
} $vicxE~-E
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private int size=0; VYvHpsI
*S*;rLH9c
private int[] queue; <` HLG2
g(|p/%H
public int get() { )0!hw|0|
return queue[1]; _bFX(~37z?
} S__+S7]Nr
XYf;72*
public void remove() { ?f:FmgQk
SortUtil.swap(queue,1,size--); _^Rf*G!
fixDown(1); vfmKYiLp
} )4"G1R`3
file://fixdown D{\hPv
private void fixDown(int k) { ASPfzW2
int j; v;irk<5
while ((j = k << 1) <= size) { P3);R>j
if (j < size %26amp;%26amp; queue[j] j++; km.xy_v
if (queue[k]>queue[j]) file://不用交换 v"\Q/5p
break; o)srE5
SortUtil.swap(queue,j,k); DL<r2h
k = j; Z-Zox-I1}-
} ,253'53W)
} JoIffI?{(D
private void fixUp(int k) { *=)%T(^
while (k > 1) { kC6J@t)
int j = k >> 1; BPtU]Bv-
if (queue[j]>queue[k]) Ig*!0(v5$
break; x>7}>Y*(
SortUtil.swap(queue,j,k); HtPasFrJ
k = j; 6imDA]5N&
} ]#KZ W)M
} Ez+.tbEA,
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} ;}WdxWw4
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} LQ373 j-
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SortUtil： Cz8=G;\
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package org.rut.util.algorithm; Q(>89*b&
XF'K dz>p
import org.rut.util.algorithm.support.BubbleSort; ig)rK<@*[
import org.rut.util.algorithm.support.HeapSort; -"#;U`.oh7
import org.rut.util.algorithm.support.ImprovedMergeSort; _.yBX\tf[
import org.rut.util.algorithm.support.ImprovedQuickSort; =X]$J@j
import org.rut.util.algorithm.support.InsertSort; >@`D@_v
import org.rut.util.algorithm.support.MergeSort; ]t(;bD hT
import org.rut.util.algorithm.support.QuickSort; `pOiv&>
import org.rut.util.algorithm.support.SelectionSort; =;`+^
import org.rut.util.algorithm.support.ShellSort; c5nl!0XX
eBlVb*nmq
/** ldO6W7G|h
* @author treeroot vrLI`3n]
* @since 2006-2-2 1s"6
* @version 1.0 WfL5.&
*/ u#ag|b/C:
public class SortUtil { d*4fl.
public final static int INSERT = 1; q!t_qX7u
public final static int BUBBLE = 2; ?1JS*LQ$
public final static int SELECTION = 3; ^dM,K p
public final static int SHELL = 4; zkA"2dh
public final static int QUICK = 5; ;n?H/(6X8>
public final static int IMPROVED_QUICK = 6; |Rf4^vN
public final static int MERGE = 7; $&OoxC
public final static int IMPROVED_MERGE = 8; 2<y!3OeN
public final static int HEAP = 9; ]KBzuz%
(ylpH`
public static void sort(int[] data) { )u7y.o
sort(data, IMPROVED_QUICK); OjcxD5"v9
} =I-SQI8
private static String[] name={ _ )b:F=4j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q$Gf9&ZO
}; MR}GxI
NnRR"'
private static Sort[] impl=new Sort[]{ )`, Bt
new InsertSort(), ou0(C`
new BubbleSort(), +vY8HQ|v
new SelectionSort(), ]X ,f
new ShellSort(), gf$5pp-
new QuickSort(), KU|dw^Yk
new ImprovedQuickSort(), sL[&y'+
new MergeSort(), /J")S?. [u
new ImprovedMergeSort(), WPPz/c|j
new HeapSort() MdV-;uf
}; :7 Ro9z8
N<}{oIsZ+
public static String toString(int algorithm){ Y_ b;1RN
return name[algorithm-1]; no~hYyW2
} 5|._K(M
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public static void sort(int[] data, int algorithm) { 60ccQ7=
impl[algorithm-1].sort(data); #T &z`
} qv>?xKSm
wxYB-Wh<
public static interface Sort { 6nRXRO
public void sort(int[] data); j-e/nZR@
} |j3mI\ANF
aY&He~
public static void swap(int[] data, int i, int j) { @8a1a3_F
int temp = data; |1iCt1~U
data = data[j]; v!{mpF
data[j] = temp; ?fr -5&,
} @Fv"j9j-3G
} {x$jGiag+8