[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; waQNX7Xdn
} HvK<>9
int i1=l; ;yY>SaQ
int i2=mid+1; 3A4?9>g)KU
for(int cur=l;cur<=r;cur++){ #; E,>0
if(i1==mid+1) jIZQ/xp8_
data[cur]=temp[i2++]; -&M9Yg|Se
else if(i2>r) nmc=RK^cM
data[cur]=temp[i1++]; :De}5BMy
else if(temp[i1] data[cur]=temp[i1++]; Z5[ t/
else hBz~FB];&
data[cur]=temp[i2++]; 9/{+,RpC
} ai`fP{WlX
} f<uLbJ6
JV/K ouL
} 2z:4\Y5
~{*FjZ`h
改进后的归并排序: D^04b<O<x
pJVzT,poh
package org.rut.util.algorithm.support; :"3WCB
Bg"b,&/^u
import org.rut.util.algorithm.SortUtil; @YU}0&
~ra2Xyl
/** 2hw3+o6
* @author treeroot =YB3^Z
* @since 2006-2-2 BGodrb1
* @version 1.0 wP6~HiC
*/ $oH?oD1
public class ImprovedMergeSort implements SortUtil.Sort { ZdlZ,vK^.
g/mVd;#o
private static final int THRESHOLD = 10; Up*p*(d3
hrNri$
/* |M[E^
* (non-Javadoc) \QBODJ1
* 6BFtY+.y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mm:6+
*/ .O3i"X]
public void sort(int[] data) { pYI`5B4
int[] temp=new int[data.length]; Od>Ta_
mergeSort(data,temp,0,data.length-1); SvAz9>N4
} :'f#0ox
>VE,/?71@
private void mergeSort(int[] data, int[] temp, int l, int r) { L<J';#BD
int i, j, k; ]H[RY&GY
int mid = (l + r) / 2; e8a_)TU?
if (l == r) xFHc+m' m~
return; P_z3TK
if ((mid - l) >= THRESHOLD) zW!3>(L/
mergeSort(data, temp, l, mid); 3 {\b/NL$
else z62e4U][
insertSort(data, l, mid - l + 1); >9Fs)R]P
if ((r - mid) > THRESHOLD) Ua,Lg.z
mergeSort(data, temp, mid + 1, r); k5$_Q#
else J1 a/U@"
insertSort(data, mid + 1, r - mid); lHV bn7
<o3e0JCq
for (i = l; i <= mid; i++) { it,i^32|
temp = data; I6M 7xn
} GW ?.b_6*
for (j = 1; j <= r - mid; j++) { *["9;_KD
temp[r - j + 1] = data[j + mid]; YnNB#x8|
} {e<J}-/?
int a = temp[l]; (%oZgvM
int b = temp[r]; ,`^B!U3m
for (i = l, j = r, k = l; k <= r; k++) { 8,a&i:C
if (a < b) { 9<.FwV>
data[k] = temp[i++]; F6}Pwz[c
a = temp; DFwkd/3"
} else { F8Rd#^9PD
data[k] = temp[j--]; )V!9&
b = temp[j]; X'TQtI
} O9r3^y\>I
} [j?n}D@L
} U!XC-RA3 _
SWz+.W{KQ"
/** e/r41
* @param data 6$4G&'J
* @param l ^IjKT
* @param i fYuJf,I[f
*/ #y&3`Nz3
private void insertSort(int[] data, int start, int len) { 8%_XJyg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [kt!\-
} 9Y&n$svB
} fv5'Bl
} w+=>b
} 54JZEc
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堆排序： )xiic3F
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package org.rut.util.algorithm.support; "(`2eXRn
m%QSapV
import org.rut.util.algorithm.SortUtil; B=n[)"5fBO
j6S"UwJjp
/** q0&$7GH4
* @author treeroot G:IP? z]
* @since 2006-2-2 gL3iw!7
* @version 1.0 8{0k0 &x
*/ :Q_3hK
public class HeapSort implements SortUtil.Sort{ %S@L|t
M`7y>Ud
/* (non-Javadoc) F~HRME;Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5o)Y$>T0
*/ 8Pmdk1 ~
public void sort(int[] data) { 0;<)\Wt=i9
MaxHeap h=new MaxHeap(); 3qaMO#{M
h.init(data); ''H"^oS
for(int i=0;i h.remove(); ]<XR]FHx)
System.arraycopy(h.queue,1,data,0,data.length); v^N`IJq
} W)*p2#l
5~H#(d<oZ
private static class MaxHeap{ ZmEEj-*7s
DyO$P#~?
void init(int[] data){ 9Uf j
this.queue=new int[data.length+1]; +f|BiW
for(int i=0;i queue[++size]=data; a.2L*>p
fixUp(size); ;H'gT+t<c
} ;_O)p,p
} 3jZ6kfj
Y32 "N[yw
private int size=0; R=]d%L8
xQ4%e[/
private int[] queue; u92^(|
xSMt*]=9
public int get() { 5/MKzoB
return queue[1]; ^D{lPu 3
} ^oM|<";!?D
9'[ N1Un.=
public void remove() { 0bS|fMgc
SortUtil.swap(queue,1,size--); :A1:
fixDown(1); _; Y`
} Iu[|<Cx
file://fixdown lpB3&H8&
private void fixDown(int k) { %NHkDa!
int j; 2]cRXJ7h
while ((j = k << 1) <= size) { NSQp< m
if (j < size %26amp;%26amp; queue[j] j++; p-GAe,2q
if (queue[k]>queue[j]) file://不用交换 T;5r{{
break; #,d I$gY
SortUtil.swap(queue,j,k); c;2#,m^
k = j; YW/QC'_iC
} oczG|_
} !C4!LZ0A
private void fixUp(int k) { X;oa[!k
while (k > 1) { 9$qm>,o
int j = k >> 1; ?9{~> 4@
if (queue[j]>queue[k]) QXgE dsw
break; )wvHGecp*
SortUtil.swap(queue,j,k); Ho;X4lo[j
k = j; yQ,{p@#X8
} V[o`\|<
} 06q(aI^Ch@
-G7TEq)
} 2-N 'ya
4JGtI*%5lq
} /U&Opo {aO
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SortUtil： aJ") <_+
~*A8+@\R
package org.rut.util.algorithm; o1cErI&q"
~Wo)?q8UY,
import org.rut.util.algorithm.support.BubbleSort; Y_woKc*
import org.rut.util.algorithm.support.HeapSort; G3G#ep~)vC
import org.rut.util.algorithm.support.ImprovedMergeSort; F8:vDv
import org.rut.util.algorithm.support.ImprovedQuickSort; Zwz&rIQpT
import org.rut.util.algorithm.support.InsertSort; ",7Q
import org.rut.util.algorithm.support.MergeSort; *!s;"U
import org.rut.util.algorithm.support.QuickSort; i.D3'l
import org.rut.util.algorithm.support.SelectionSort; PYbVy<xc
import org.rut.util.algorithm.support.ShellSort; i0$Bx>
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/** CCBfKp
* @author treeroot eIRLNxt+v
* @since 2006-2-2 ia\eLzj
* @version 1.0 2'EUy@0
*/ AV9m_hZt
public class SortUtil { ( +pLA"xq
public final static int INSERT = 1; n!p<A.O7@
public final static int BUBBLE = 2; NS%WeAf
public final static int SELECTION = 3; (bsXo q
public final static int SHELL = 4; n8*;lK8
public final static int QUICK = 5; "j;4 k.`h
public final static int IMPROVED_QUICK = 6; MjlP+; !
public final static int MERGE = 7; $YN6<5R)
public final static int IMPROVED_MERGE = 8; ),G=s Oo
public final static int HEAP = 9; #wL
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public static void sort(int[] data) { h$4Hw+Yxs]
sort(data, IMPROVED_QUICK); 5?hw !
} %?e& WLS
private static String[] name={ N(I&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %3NqSiMs
}; <B9C*M"4%
*s9C!wYMZ
private static Sort[] impl=new Sort[]{ CC#;c1t
new InsertSort(), d ,4]VE
new BubbleSort(), &?mD$Eo
new SelectionSort(), Tyvtmx M
new ShellSort(), ?c[*:N(
new QuickSort(), o.0ci+z@
new ImprovedQuickSort(), WI?oSE w
new MergeSort(), sZx/Ee
new ImprovedMergeSort(), At-U2a#J{
new HeapSort() $s9Vrw0Z
}; {r@Ty*W} L
gw,UQbnu
public static String toString(int algorithm){ ma"3qGy
return name[algorithm-1]; 1P~X8=9h
} h }B% /U
>}+/{(K"E|
public static void sort(int[] data, int algorithm) { MyT q
impl[algorithm-1].sort(data); ZosP(Tdq
} gbH<]?
xlhG,bb7
public static interface Sort { $GlWf
public void sort(int[] data); b )B? F
} {q"OM*L(
"?V0$-DR
public static void swap(int[] data, int i, int j) { i_j[?.?X}
int temp = data; &YF^j2
data = data[j]; 28 ?\
data[j] = temp; &l!4mxwr`
} <YdE1{fm
} z^'gx@YD*v