[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; >w S'z]T9
} e(0OZ_w
int i1=l; Ehx9-*]
int i2=mid+1; <fUo@]Lv
for(int cur=l;cur<=r;cur++){ S^rf^%
if(i1==mid+1) Cyg2o<O@
data[cur]=temp[i2++]; )E^S+ps
else if(i2>r) [YOH'i&X
data[cur]=temp[i1++]; 7}kJp%-
else if(temp[i1] data[cur]=temp[i1++]; ! ?g+'OM
else ix!xLm9\
data[cur]=temp[i2++]; FzInIif
} *fg2bz<~[B
} bk0>f
pa>C}jk}6
} ZNQx;51
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改进后的归并排序: [neuwdN
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package org.rut.util.algorithm.support; QLd*f[n
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import org.rut.util.algorithm.SortUtil; UGcmzwE
^&>B,;Wu
/** 7ch9Pf
* @author treeroot mLhM_=
* @since 2006-2-2 /v 8"i^;}
* @version 1.0 Q~N,QMr)k&
*/ sINQ?4_8T
public class ImprovedMergeSort implements SortUtil.Sort { j"qND=15
Nfa&r
private static final int THRESHOLD = 10; ? :H+j6+f
S{=5nR9j
/* jK w 96
* (non-Javadoc) FNQ<k[#K'~
* ,2FK$:M\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b80#75Bj>
*/ o"VKAP
public void sort(int[] data) { d[a(uWEl
int[] temp=new int[data.length]; "_WN[jm
mergeSort(data,temp,0,data.length-1); #3&@FzD_P
} =CLPz8
|v!N1+v0
private void mergeSort(int[] data, int[] temp, int l, int r) { OC=&!<
int i, j, k; d(q1?{zr4
int mid = (l + r) / 2; ;R?@ D]
if (l == r) 0AB a&'h
return; p'jc=bL E
if ((mid - l) >= THRESHOLD) CWdsOS=
mergeSort(data, temp, l, mid); T fLqxioqZ
else J"r?F0
insertSort(data, l, mid - l + 1); (D>_O$o
if ((r - mid) > THRESHOLD) ;(i6 X)
mergeSort(data, temp, mid + 1, r); +mocSx[
else <M:BN6-yG
insertSort(data, mid + 1, r - mid); 7e"}ojt$
8['R D`O
for (i = l; i <= mid; i++) { .+:iAnf
temp = data; Q#eMwM#~
} T[\1=h]
for (j = 1; j <= r - mid; j++) { HI8mNX3 "j
temp[r - j + 1] = data[j + mid]; t13V>9to
} Z[?n{vD7
int a = temp[l]; -XBZ1q
int b = temp[r]; !5ps,+o
for (i = l, j = r, k = l; k <= r; k++) { Os9SfL
if (a < b) { s)-oCT$[
data[k] = temp[i++]; 3xyrWl
a = temp; <h#*wy:o2
} else { 5u$.!l8Nl
data[k] = temp[j--]; g>/Y}{sL-
b = temp[j]; \|HtE(uCM1
} b| L;*<KU
} s#X/ F
} J M`w6}
xi (@\A
/** -xtT,^<B
* @param data 9X*Nk~}Y
* @param l hr vTFJ
* @param i &=@{`2&
*/ zD{]3pg
private void insertSort(int[] data, int start, int len) { 4(Lmjue]?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @)Vpj\jM-C
} :60vbO
} 7#LIGr
} x3O%W?5
} *6}M.`.-
=$'>VPQ
堆排序： #NM)
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package org.rut.util.algorithm.support; jq~`rE h9
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import org.rut.util.algorithm.SortUtil; Nv5^2^Sc=
'cO8& |
/** p(F@lL-
* @author treeroot b<W\#3~G
* @since 2006-2-2 JQQyl:=
* @version 1.0 F.vRs|fk
*/ !JCs'?A
public class HeapSort implements SortUtil.Sort{ 7By7F:[b
?|M-0{
/* (non-Javadoc) v-8>@s jy8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OUulG16kK
*/ x1gS^9MqCB
public void sort(int[] data) { !gXxM,R
MaxHeap h=new MaxHeap(); \+o\wTW
h.init(data); fK/:
for(int i=0;i h.remove(); iYXD }l;r
System.arraycopy(h.queue,1,data,0,data.length); m212 gc0u
} SAm%$vz%M
"c%wq0
private static class MaxHeap{ WDc[+Xyw
XFhH+4#]
void init(int[] data){ 2!%)_<
this.queue=new int[data.length+1]; 3bRxV @0.
for(int i=0;i queue[++size]=data; Gk:fw#R
fixUp(size); DGFSD Py[
} FvsVfV U
} Ct=bZW"j/
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private int size=0; 4%0s p
O=Su E/q
private int[] queue; kQ+y9@=/g
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public int get() { 5_9`v@-4_
return queue[1]; }3z3GU8Q-
} X'OpR
k0Vri$x
public void remove() { u$?!
SortUtil.swap(queue,1,size--); A'EI1_3{
fixDown(1); C%4ed#
} 8\{!*?9!
file://fixdown !S?Fz]
private void fixDown(int k) { $yOB-
int j; <#0i*PM_
while ((j = k << 1) <= size) { +^7cS6"L
if (j < size %26amp;%26amp; queue[j] j++; !oz{XWE
if (queue[k]>queue[j]) file://不用交换 UBd+,]"f
break; 0AM_D >fH
SortUtil.swap(queue,j,k); w:zo \
k = j; <K)]kf
} S}C[
} YJ~<pH
private void fixUp(int k) { )G48,. "
while (k > 1) { CPZ{
int j = k >> 1; SK}jhm"y
if (queue[j]>queue[k]) Fo3*PcUv
break; *~8F.cx
SortUtil.swap(queue,j,k); O?vh]o
k = j; Z}O]pm>=G
} qGX@mo({
} h3F559bw/<
$:s@nKgnD~
} 5AT^puL]]
s9C^Cy^su
} 0H_Ai=G
qT?{}I
SortUtil： W*LC3B^
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package org.rut.util.algorithm; SGKAx<U
&YIL As^8A
import org.rut.util.algorithm.support.BubbleSort; M~zI;:0O
import org.rut.util.algorithm.support.HeapSort; O/eZ1YAC
import org.rut.util.algorithm.support.ImprovedMergeSort; ?;tPqOs&
import org.rut.util.algorithm.support.ImprovedQuickSort; 2P:X_:`~[
import org.rut.util.algorithm.support.InsertSort; ->ZP.7
import org.rut.util.algorithm.support.MergeSort; s8 WB!x{t
import org.rut.util.algorithm.support.QuickSort; Y%i<~"k
import org.rut.util.algorithm.support.SelectionSort; 56C8)?
import org.rut.util.algorithm.support.ShellSort; !$Uo$?gC
ij]UAJ}t
/** Dbn~~P
* @author treeroot e"866vc,
* @since 2006-2-2 k_t|) J
* @version 1.0 aQoB1qd8
*/ Q7x[08TI
public class SortUtil { {/noYB<;
public final static int INSERT = 1; fDr$Wcd~
public final static int BUBBLE = 2; '6zZ`Ll9
public final static int SELECTION = 3; hT^&*}G
public final static int SHELL = 4; {^oohW -
public final static int QUICK = 5; "e-z2G@z
public final static int IMPROVED_QUICK = 6; w,P@@Q E
public final static int MERGE = 7; NFVu~t
public final static int IMPROVED_MERGE = 8; 10Eun }
public final static int HEAP = 9; XU7to]'K
J *LPv9)
public static void sort(int[] data) { L\mF[Kd#+T
sort(data, IMPROVED_QUICK); bofI0f}5.
} TqJ @l
private static String[] name={ `:'ciY|%b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }wo:1v8J
}; ,?LE5]
<^nS%hXEr
private static Sort[] impl=new Sort[]{ Q7y'0s
new InsertSort(), w!UF^~
new BubbleSort(), KY&Lv^1_|
new SelectionSort(), SB%D%Zx6'%
new ShellSort(), POk5+^
new QuickSort(), ^m7y=CJM
new ImprovedQuickSort(), 4lPO*:/
new MergeSort(), 0$Tb5+H5
new ImprovedMergeSort(), QP~["%}T
new HeapSort() :G6CWE
}; Fepsa;\sU
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public static String toString(int algorithm){ n\;;T1rM
return name[algorithm-1]; pYcs4f!?p
} .?:#<=1
Q>L(=j2t
public static void sort(int[] data, int algorithm) { 9ug4p']
impl[algorithm-1].sort(data); hV $Zr4'
} iq3)}hGo
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public static interface Sort { xqSZ{E:
public void sort(int[] data); ?"'+tZ=f6
} $mK;{9Z
z1b@JCWE
public static void swap(int[] data, int i, int j) { 1Z0Qkd(
int temp = data; << =cZ.HP
data = data[j]; hXFT(J=
data[j] = temp; iUz?mt;k
} 1E$\&*(
} 7&,$