[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; <nHkg<O6Y
} yI;"9G
int i1=l; 5LW}h^N
int i2=mid+1; 6(V /yn~
for(int cur=l;cur<=r;cur++){ IApT'QNM
if(i1==mid+1) >,5i60Q
data[cur]=temp[i2++]; [ !%R#+o=F
else if(i2>r) u'5`[U -!
data[cur]=temp[i1++]; 2Aq~D@,9=:
else if(temp[i1] data[cur]=temp[i1++]; }VCI=?-
else ?UZ?NY
data[cur]=temp[i2++]; Ao.\
} 963aW*r
} DVp5hR_$
7[#xOZT
} (/{aJV
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改进后的归并排序: l]LxL
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package org.rut.util.algorithm.support; ]7YNIS
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import org.rut.util.algorithm.SortUtil; |Ul,6K@f"5
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/** eVz#7vqv
* @author treeroot </~ 6f(mg
* @since 2006-2-2 c0- ;VZ'
* @version 1.0 '-PC7"o
*/ gX @`X
public class ImprovedMergeSort implements SortUtil.Sort { MDa7 B +4
Hh[Tw&J4
private static final int THRESHOLD = 10; ]!"S+gT*C
Y%`SHe7M
/* 1T|$BK@)
* (non-Javadoc) 4`v!Z#e/aX
* JgfVRqm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &)9{HRP
*/ hlbvt-C?}"
public void sort(int[] data) { 3{7T4p.G
int[] temp=new int[data.length]; TpfZ>d2
mergeSort(data,temp,0,data.length-1); Ty4S~ClO#'
} WCq /c6 D
-apXI.
private void mergeSort(int[] data, int[] temp, int l, int r) { tD=@SX'Y
int i, j, k; L=!of{4Z(}
int mid = (l + r) / 2; z%d#@w0X1
if (l == r) 3z =^(Y
return; v4vf}.L]
if ((mid - l) >= THRESHOLD) p.JXSn
mergeSort(data, temp, l, mid); Z=z%$l
else J>0b1
insertSort(data, l, mid - l + 1); :<S<f%
if ((r - mid) > THRESHOLD) W[''Cc.
mergeSort(data, temp, mid + 1, r); G-um`/<%
else 2b@tj 5
insertSort(data, mid + 1, r - mid); |F$BvCg
,_v|#g@{
for (i = l; i <= mid; i++) { n.6T OF
temp = data; #CUzuk&
} QV|>4^1D
for (j = 1; j <= r - mid; j++) { n%%7KTqu
temp[r - j + 1] = data[j + mid]; ?;ukvD
} .8gl< vX
int a = temp[l]; IzLF'F
int b = temp[r]; -6~'cm
for (i = l, j = r, k = l; k <= r; k++) { (nSml,gU
if (a < b) { 0JyVNuHn
data[k] = temp[i++]; HM[klH]s=
a = temp; "E*e2W
} else { "9y( }
data[k] = temp[j--]; </zXA$m
b = temp[j]; Yg|lq9gD
} -#:zsu
} vRQOs0F;
} K|S:{9Q
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/** s<QkDERMX
* @param data F3U`ueP
* @param l a|j%n
* @param i 0S/' 94%w
*/ fRZ KEIyk
private void insertSort(int[] data, int start, int len) { ^-)txC5{T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GRqT-/n"
} 77 r(*.O|
} C|-pD
} T3%C%BcX
} k\)Cw
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堆排序： NaUr!s
L{{CAB!
package org.rut.util.algorithm.support; s Kicn5
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import org.rut.util.algorithm.SortUtil; `RRE(SiKU
R=j% S!
/** BHFY%6J!
* @author treeroot }CGSEr4'w~
* @since 2006-2-2 Cr ?4Ngw
* @version 1.0 "hz\Z0zg2
*/ \Gp*x\<^Z
public class HeapSort implements SortUtil.Sort{ JC?N_kP%W
^]C&tG0 !
/* (non-Javadoc) ]88];?KS}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !c#]?b%
*/ xJ8%<RR!t
public void sort(int[] data) { X|LxV]
MaxHeap h=new MaxHeap(); ;QCrHqRT`
h.init(data); _banp0ywS
for(int i=0;i h.remove(); W;6vpPhg#!
System.arraycopy(h.queue,1,data,0,data.length); c:!zO\P#
} "`Ge~N[$A
/'.=sH
private static class MaxHeap{ :nY2O
XMN:]!1J
void init(int[] data){ 7Cqcb>\X
this.queue=new int[data.length+1]; 0u B'g+MU`
for(int i=0;i queue[++size]=data; (oz$B0HO:
fixUp(size); lK7m=[j
} ow'Vz Ay-
} Mj=$y?d ]
24c ek
private int size=0; Ey[On^$
cE'L% Z
private int[] queue; y3u+_KY-
0U/,aHvhP
public int get() { B@YyQ'
return queue[1]; #K\?E.9h
} }G<T:(a
58xnB!h\}
public void remove() { %(/!ljh_
SortUtil.swap(queue,1,size--); VZn=rw
fixDown(1); 7%?jL9Vw
} QnouBrhO
file://fixdown yF._*9Q3hK
private void fixDown(int k) { FyoEQ%.bI
int j; B$Z3+$hfF
while ((j = k << 1) <= size) { P,DC7\
if (j < size %26amp;%26amp; queue[j] j++; T'-FV
if (queue[k]>queue[j]) file://不用交换 "t=hzn"~%
break; Joe_PS
SortUtil.swap(queue,j,k); SlLw{Yb7\.
k = j; R8ONcG
} oPKr* `'
} K0+.q?8D|
private void fixUp(int k) { 7xo4-fIuT
while (k > 1) { RC#C\S6
int j = k >> 1; NSAF4e
if (queue[j]>queue[k]) y&[y=0!
break; |!SOG
SortUtil.swap(queue,j,k); I&|f'pn^<
k = j; |C%Pjl^YkV
} Scm36sT{
} J T#d(Y
&hIRd,1#
} %6%<?jZ
W/ay.I
} Z=5qX2fy1*
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SortUtil： w2O!M!1
98jN)Nl,oD
package org.rut.util.algorithm; xda; K~w
W=B"Q qL
import org.rut.util.algorithm.support.BubbleSort; AwUi+|7r])
import org.rut.util.algorithm.support.HeapSort; RZpcXv
import org.rut.util.algorithm.support.ImprovedMergeSort; <N,)G |&
import org.rut.util.algorithm.support.ImprovedQuickSort; DHC+C4
import org.rut.util.algorithm.support.InsertSort; RPnRVJ&"Z
import org.rut.util.algorithm.support.MergeSort; Mp$@`8X`
import org.rut.util.algorithm.support.QuickSort; `p kMN
import org.rut.util.algorithm.support.SelectionSort; _M[,!{C
import org.rut.util.algorithm.support.ShellSort; {%v-(
q@5K6yE
/** Y<"7x#AB!
* @author treeroot cV{%^0?D
* @since 2006-2-2 5v)(8|.M
* @version 1.0 }ov&.,vQ
*/ Dq@2-Cv
public class SortUtil { q-ES6R
public final static int INSERT = 1; W,@ If}
public final static int BUBBLE = 2; &5{xXWJK
public final static int SELECTION = 3; 1{Mcs%W;w5
public final static int SHELL = 4; e,_-Je
public final static int QUICK = 5; BElJB&I
public final static int IMPROVED_QUICK = 6; @.$Xv>Jt$
public final static int MERGE = 7; q}BzyC=:n
public final static int IMPROVED_MERGE = 8; gnp~OVDqfL
public final static int HEAP = 9; ^04Q%,
tcr//
public static void sort(int[] data) { NCqo@vE
sort(data, IMPROVED_QUICK); t2" (2
} ! Z`0(d
private static String[] name={ *Oc.9 F88"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Awv`)"RAR
}; XMB[h
;;$#)b
private static Sort[] impl=new Sort[]{ C${S^v
new InsertSort(), ajRSMcKb7i
new BubbleSort(), p Rdk>Ph
new SelectionSort(), PfS:AIy
new ShellSort(), 2jsw"aHW
new QuickSort(), 9z;HsUv
new ImprovedQuickSort(), )?M9|u
new MergeSort(), |sZ!
new ImprovedMergeSort(), l+][V'zL
new HeapSort() t%zpNd2lk
}; ,h\sF#|
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public static String toString(int algorithm){ K-<^$VWh
return name[algorithm-1]; kc'pN&]r:
} X0;4_,=
qa(>wR"mT
public static void sort(int[] data, int algorithm) { ,6!rR,0
impl[algorithm-1].sort(data); plu$h-$d
} p47S^gW
J?JeU/:+
public static interface Sort { GSoZx0
public void sort(int[] data); qrvsjYi*w
} 'Djm0
Uq_j\A;c
public static void swap(int[] data, int i, int j) { '/Bidb?
int temp = data; UmnE@H"t$\
data = data[j]; e6X[vc|Y}
data[j] = temp; -"Y{$/B
} D9mz9
} 2-zT$`[]J