[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; px${ "K<
} 52,[dP,g
int i1=l; l+nT$IPF
int i2=mid+1; OsT|MX
for(int cur=l;cur<=r;cur++){ -UB XWl
if(i1==mid+1) J7;8 S
data[cur]=temp[i2++]; MCO2(E-
else if(i2>r) rdH3!
data[cur]=temp[i1++]; {gz-w|7
else if(temp[i1] data[cur]=temp[i1++]; ;mT
else r'(*#
data[cur]=temp[i2++]; 8bJj3vr
} xlcL;e&^P
} zm!M'|~@7
Q}9!aB,
} xyD2<?dGUb
h6b(FTC^
改进后的归并排序: }el7@Gv
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package org.rut.util.algorithm.support; 5szJ.!(
5) q_Aro
import org.rut.util.algorithm.SortUtil; )b?$ 4<X^
,njlKkFw^Z
/** )+Y"4?z~
* @author treeroot a]/KJn/B(
* @since 2006-2-2 P$x9Z3d_
* @version 1.0 Vk> &
*/ ,!40\"A
public class ImprovedMergeSort implements SortUtil.Sort { n:[@#xs-
k|,Y_h0Y
private static final int THRESHOLD = 10; -7KoR}Ck!
Lb?WhjqZ
/* efNscgi
* (non-Javadoc) ..kFn!5(g
* oJZxRm[g$t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ld 0*)rI#
*/ 9 JhCSw-<)
public void sort(int[] data) { 0xx4rpH
int[] temp=new int[data.length]; ;W T<]
mergeSort(data,temp,0,data.length-1); +T&YYO8>5
} :R`e<g~4
4fIjVx
private void mergeSort(int[] data, int[] temp, int l, int r) { 80=LT-%#
int i, j, k; Y7zs)W8xTT
int mid = (l + r) / 2; Q*Y-@lZ
if (l == r) gnGh )
return; 1c{m rsB
if ((mid - l) >= THRESHOLD) h% KEg667
mergeSort(data, temp, l, mid); }hsNsQ
else DS;\24>H
insertSort(data, l, mid - l + 1); P-a8S*RRa
if ((r - mid) > THRESHOLD) Xt:$H6 y
mergeSort(data, temp, mid + 1, r); Ims?
else Wsgp#W+
insertSort(data, mid + 1, r - mid); `#'j3,\6
ZH|q#<{l
for (i = l; i <= mid; i++) { {?Nm"#
temp = data; =IW!ZN_
} (3K3)0fy
for (j = 1; j <= r - mid; j++) { ,oUzaEX
temp[r - j + 1] = data[j + mid]; "P0!cY8r
} }AA">FF'y4
int a = temp[l]; 0zA;%oP
int b = temp[r]; "-djA,`
for (i = l, j = r, k = l; k <= r; k++) { Q=8YAiCu
if (a < b) { !d<R=L
data[k] = temp[i++]; ii_kgqT^
a = temp; v$0|\)E)
} else { xVw@pR;
data[k] = temp[j--]; kc0MQ TJU
b = temp[j]; g5y`XFY
} mZ2CGOR
} 0VcHz$ 6
} JRi:MWR<r
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/** /='0W3+o*L
* @param data =3c?W&:
* @param l xhbN=L
* @param i v@|<.
*/ hcj]T?
private void insertSort(int[] data, int start, int len) { NuPlrCy;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :>.{w$Ln%
} .n1&Jsey
} *ma w`1
} 4VZI]3K,
} XrM+DQ;
4/|x^Ky>G
堆排序： WM`3QJb
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package org.rut.util.algorithm.support; X+ITW#
r) x
import org.rut.util.algorithm.SortUtil; z`IW[N7Z
!DzeJWM|
/** t*9 gusmG
* @author treeroot A!Cby!,
* @since 2006-2-2 $*942. =Q
* @version 1.0 6w7;
*/ 5PO_qr=Hx
public class HeapSort implements SortUtil.Sort{ o3dqsQE%
&Gh0f"?
/* (non-Javadoc) F<k+>e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q3tyK{JE
*/ V.&F%(L
public void sort(int[] data) { GZ~Tl0U
MaxHeap h=new MaxHeap(); v']_)
h.init(data); 3~T ~Bs
for(int i=0;i h.remove(); ;Y\LsmZ;F
System.arraycopy(h.queue,1,data,0,data.length); vSR&>Q%X
} [(@K;6o
?OFa Q
private static class MaxHeap{ u:f ]|Q
RFL* qd4
void init(int[] data){ <4; nq~
this.queue=new int[data.length+1]; 7.<jdp
for(int i=0;i queue[++size]=data; L]H'$~xx*
fixUp(size); ).^d3Kp
} 3<&:av3
} oj djy#:
QCW4gIp
private int size=0; d}4NL:=&
Nu6NyYs
private int[] queue; Cq!eAc
QT,T5Q%JP:
public int get() { gS~H1Ro
return queue[1]; #@B"E2F
} #gQn3.PX+y
+r3)\L{U
public void remove() { ML_VD*t9
SortUtil.swap(queue,1,size--); 9,'m,2%W
fixDown(1); P`lv_oV
} <2U@O` gC
file://fixdown JJd qdX;
private void fixDown(int k) { pX_#Y)5
int j; !G3AD3
while ((j = k << 1) <= size) { PT2;%=f
if (j < size %26amp;%26amp; queue[j] j++; RE;A0E_3
if (queue[k]>queue[j]) file://不用交换 DEZww9T2Qs
break; v8ap"9b
SortUtil.swap(queue,j,k); op}!1y$9P
k = j; #-;c!<2
} 7.h{"xOx{
} rRq60A
private void fixUp(int k) { E%`J=C}
while (k > 1) { 4f\NtQ)
int j = k >> 1; ^!1!l-
if (queue[j]>queue[k]) &'z_:Wm
break; gyvrQ, u
SortUtil.swap(queue,j,k); '|IcL1c=I
k = j; Vu5?;|^:
} $.jGO!
} l53i {o
jo:Z
} %4*c/ c6
U>PZ3
} LlX)xJ
RM|J |R
SortUtil： \(Sly&gL
LL(xi )
package org.rut.util.algorithm; (TT=i
D^6*Cwb
import org.rut.util.algorithm.support.BubbleSort; ^+m`mcsE
import org.rut.util.algorithm.support.HeapSort; &ys>z<Z
import org.rut.util.algorithm.support.ImprovedMergeSort; #%E`~&[
import org.rut.util.algorithm.support.ImprovedQuickSort; _<S!tW
import org.rut.util.algorithm.support.InsertSort; ]@$^Ju,
import org.rut.util.algorithm.support.MergeSort; yvB]rz} i
import org.rut.util.algorithm.support.QuickSort; [inlxJD
import org.rut.util.algorithm.support.SelectionSort; *igmi9A
import org.rut.util.algorithm.support.ShellSort; ws0qwv#
o'DtW#F
/** MRLiiIrq,5
* @author treeroot ztO)~uL
* @since 2006-2-2 R:~aX,qR
* @version 1.0 3:WqUb\QK
*/ h[remR#3\
public class SortUtil { ]\M{Abqd{
public final static int INSERT = 1; << 6GE
public final static int BUBBLE = 2; GeR#B;{
public final static int SELECTION = 3; oYu xkG
public final static int SHELL = 4; Q#p)?:o/
public final static int QUICK = 5; vvxxwZa=O
public final static int IMPROVED_QUICK = 6; =!\Nh,\eQ
public final static int MERGE = 7; <j'K7We/tP
public final static int IMPROVED_MERGE = 8; 2w.FC
public final static int HEAP = 9; 'NtI bS
>+%#m'Y&&
public static void sort(int[] data) { R{@saa5I(>
sort(data, IMPROVED_QUICK); ]K(a32VCH
} |Rfj 0+
private static String[] name={ i-CJ{l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NljpkeX'
}; ,l>w9?0Z
-gs I:-Xo
private static Sort[] impl=new Sort[]{ hY4#4A`I
new InsertSort(), nd'D0<%
new BubbleSort(), ;dzy5o3
new SelectionSort(), \tgY2:
new ShellSort(), I1]YT
new QuickSort(), M XG>|
new ImprovedQuickSort(), Km5_P##
new MergeSort(), pz^S3fy
new ImprovedMergeSort(), 6(E4l5%
new HeapSort() %j&vV>2
}; [Hx}#Kds
5Dkb/Iagi
public static String toString(int algorithm){ b~.$1oZ
return name[algorithm-1]; Y(,RJ&7
} <f7 O3 >
:I#.d7`uk
public static void sort(int[] data, int algorithm) { q{9vY:`[
impl[algorithm-1].sort(data); w[z=x
} "(mJupI
%wbdg&^
public static interface Sort { E3wpC#[Q1
public void sort(int[] data); 1EV bGe%b
} ,3?=W/Um4
hlVC+%8
public static void swap(int[] data, int i, int j) { Pim
int temp = data; f,ro1Nke
data = data[j]; IgbuMEfL
data[j] = temp; O8Mypv/C
} j)@W1I]2#
} ;W{z"L;nX