[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; :bRR(sP
} Kk>qgi$
int i1=l; 5\0.[W{^
int i2=mid+1; _IV@^v
for(int cur=l;cur<=r;cur++){ )v=G}j^
if(i1==mid+1) cXcx_-
data[cur]=temp[i2++]; (VaN\+I:T
else if(i2>r) RVnyl`s
data[cur]=temp[i1++]; SMO%sZ]
else if(temp[i1] data[cur]=temp[i1++]; 2 dD<]
else 0?us]lx
data[cur]=temp[i2++]; r?nV Sb|[
} 'UVv(-
} @CU|3Qg
4spaw?j
} nRB>[lG
4l}M i
改进后的归并排序: %s2"W~
;Uqx&5P}
package org.rut.util.algorithm.support; "qTC(F9N$.
Q 95
import org.rut.util.algorithm.SortUtil; P%`R7yk
\678Nx
/** e( o/we{
* @author treeroot R96o8#7Uv
* @since 2006-2-2 IR dz(~CP
* @version 1.0 z8(R.TB
*/ y)/$ge_U
public class ImprovedMergeSort implements SortUtil.Sort { @'r`(o3z!Z
Ui|a}`c
private static final int THRESHOLD = 10; Z;y}gv/{
As'M39*V
/* ^T&u!{82j
* (non-Javadoc) Z!-<rajl
* gZ"{{#:}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >3`ctbe
*/ nqxq@.L2
public void sort(int[] data) { BgWz<k}5M
int[] temp=new int[data.length]; e#6&uFce
mergeSort(data,temp,0,data.length-1); 5uV"g5?w
} $',GkK{NX
\+Rwm:lI
private void mergeSort(int[] data, int[] temp, int l, int r) { i9\\evJs
int i, j, k; @yn^6cE
int mid = (l + r) / 2; 4 ?@uF[
if (l == r) aT1CpY=T|.
return; ah/6;,T
if ((mid - l) >= THRESHOLD) Hx2j=Q_dw
mergeSort(data, temp, l, mid); vYSetAdv
else d0A\#H_&
insertSort(data, l, mid - l + 1); \ ~LU 'j
if ((r - mid) > THRESHOLD) Iq0 #A5U%
mergeSort(data, temp, mid + 1, r); 9{%g-u\
else V1`5D7Z
insertSort(data, mid + 1, r - mid); #HM\a
I4<{R
for (i = l; i <= mid; i++) { {|5$1v
temp = data; aC,vh1")F
} 0"kE^=
for (j = 1; j <= r - mid; j++) { QK?2E
temp[r - j + 1] = data[j + mid]; ?St=7a(D
} 5{ 4"JO3
int a = temp[l]; ~f=6?5.wa
int b = temp[r]; dx13vZ3[U
for (i = l, j = r, k = l; k <= r; k++) { XW~ BEa
if (a < b) { EK8E
data[k] = temp[i++]; QBfhyo_
a = temp; 64!ame}n+
} else { W\>^[c/
data[k] = temp[j--]; HhWwc#B
b = temp[j]; ?|">),
} }+dM1O
} O&3r*vd
} A)RI:?+
6t_ 3%{
/** DYAwQ"i;6
* @param data Z9"{f)T
* @param l \2R`q*a+
* @param i KO-Zz&2f
*/ z[5Y Z~}*
private void insertSort(int[] data, int start, int len) { [/AdeR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k,;lyE
} T3G/v)ufd
} j$|j8?
} qP;{3FSkAF
} o0aO0Y
*X=@yB*aK
堆排序： L,L~ .E
r;cI}'
package org.rut.util.algorithm.support; =M1a0i|d
zj9bSDVL(
import org.rut.util.algorithm.SortUtil; I3G*+6V
~jp!"f
/** +H[}T ]
* @author treeroot V4`:Vci Aw
* @since 2006-2-2 Ms:KM{T0
* @version 1.0 5w,lw
*/ *or2
public class HeapSort implements SortUtil.Sort{ NIGB[2V(
mh A~eJ
/* (non-Javadoc) 'ZGT`'ri
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;L G %s
*/ p|h.@do4
public void sort(int[] data) { GhG%>U#&a
MaxHeap h=new MaxHeap(); Sl. KLc@@
h.init(data); Vq3]7l
for(int i=0;i h.remove(); vs\'1^*D
System.arraycopy(h.queue,1,data,0,data.length); ldAov\X
} )g9)IF
$PatHY@h
private static class MaxHeap{ 'w`SBYQ5
~t{D5#LVHa
void init(int[] data){ 9{)Z5%Kz
this.queue=new int[data.length+1]; lL:KaQ0E
for(int i=0;i queue[++size]=data; A~6%,q@^jh
fixUp(size); Qb!!J4|!
} z'?7]C2b
} :LZ-da"QR
f$1Gu
private int size=0; :"M9*XeHO
-Q<z1vz
private int[] queue; t(J![wB}
0Y5LDP
public int get() { v%H"_T
return queue[1]; pau*kMu^}
} tJUVw=
{E3xI2
public void remove() { Ne &Xf
SortUtil.swap(queue,1,size--); o,?!"*EP
fixDown(1); =7 Jy
} 4*0:bhhhf_
file://fixdown H!unIy|
private void fixDown(int k) { gHQPhe#n
int j; TqS2!/jp
while ((j = k << 1) <= size) { &u+yM D
if (j < size %26amp;%26amp; queue[j] j++; 0M$#95n
if (queue[k]>queue[j]) file://不用交换 2wB.S_4"-<
break; u iBl#J Q
SortUtil.swap(queue,j,k); |7svA<<[
k = j; BCBEX&0hk{
} X|X4L(i
} FovE$Dj]
private void fixUp(int k) { +<pVf%u5
while (k > 1) { nGq]$h
int j = k >> 1; Ef2Yl
if (queue[j]>queue[k]) XMt u"K
break; bH'S.RWp=
SortUtil.swap(queue,j,k); ?r{TOjn
k = j; XOu+&wOu
} CTl(_g
} kcLj Kp
7]p>XAb
} _^_5K(Uq
<e;jWK
} dv"as4~%
f=t:[< )
SortUtil： 7)B&(2D&
x1t{SQ-C
package org.rut.util.algorithm; !cRfZ
8{R&EijC
import org.rut.util.algorithm.support.BubbleSort; YSqv86
import org.rut.util.algorithm.support.HeapSort; *,"jF!C&[
import org.rut.util.algorithm.support.ImprovedMergeSort; By2s']bw
import org.rut.util.algorithm.support.ImprovedQuickSort; 7sXy`+TZ->
import org.rut.util.algorithm.support.InsertSort; j'3j}G%\T
import org.rut.util.algorithm.support.MergeSort; ec`bz "1
import org.rut.util.algorithm.support.QuickSort; ,%A)"doaG
import org.rut.util.algorithm.support.SelectionSort; bRWIDPh
import org.rut.util.algorithm.support.ShellSort; 5,S,\O9>X
r)gCTV(kb
/** hdo&\Q2D8
* @author treeroot uc'p]WhQ
* @since 2006-2-2 Z+NF(d
* @version 1.0 lwVk(l Z
*/ i*X{^A73"
public class SortUtil { Y^QKp"
public final static int INSERT = 1; As0 B\
public final static int BUBBLE = 2; d'ZS;l
public final static int SELECTION = 3; q<n[.u1@
public final static int SHELL = 4; ;xfO16fNk
public final static int QUICK = 5; |)9thIQF
public final static int IMPROVED_QUICK = 6; "\7v
public final static int MERGE = 7; E_~x==cb
public final static int IMPROVED_MERGE = 8; Yg/}ghF\
public final static int HEAP = 9; q7|:^#{av
O]t\B*%}
public static void sort(int[] data) { %Ys$@dB
sort(data, IMPROVED_QUICK); `AR"!X
} #>=8w9]
private static String[] name={ VKy5=2&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Gu5~DyT`G
}; GMz8B-vk
PkTfJQP8
private static Sort[] impl=new Sort[]{ b6|Z"{TI _
new InsertSort(), &M[MEO`t8
new BubbleSort(), )Nbc/nB$
new SelectionSort(), _mXs4
new ShellSort(), %4,xx'`
new QuickSort(), e8oKn&
new ImprovedQuickSort(), fe|g3>/|
new MergeSort(), flP>@i:e6
new ImprovedMergeSort(), zDB"r
new HeapSort() dXl]Pe|v
}; |k6Ox*
Axlm<3<wf"
public static String toString(int algorithm){ IK'F{QPH
return name[algorithm-1]; Y.>kO
} dByjcTPA
\QGa4_#
public static void sort(int[] data, int algorithm) { wFvT0
impl[algorithm-1].sort(data); Cc!J1)
} s O=4IBE
HMV)U{
public static interface Sort { sm
public void sort(int[] data); )|pU.K9qZ
} JdiP>KXV
Yrxk Kw#
public static void swap(int[] data, int i, int j) { =p q:m
int temp = data; DVh)w}v
data = data[j]; <4c%Q)
data[j] = temp; `a >?UUT4
} +%XnMl
} ]boE{R!I