[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; "I)zi]vk
} ,!b<SQ5M
int i1=l; |5tZ*$nGa
int i2=mid+1; &=BzsBh
for(int cur=l;cur<=r;cur++){ ?q9]H5\
if(i1==mid+1) [#q]B=JB
data[cur]=temp[i2++]; BhzDV
else if(i2>r) <y] 67:"<v
data[cur]=temp[i1++]; QcW8A ,\q
else if(temp[i1] data[cur]=temp[i1++]; Wz s=BNm9
else flo$[]`.7
data[cur]=temp[i2++]; d_M+W@{
} Y55u-9|N
} UJSIbb5
8ZVQM7O
} Bskp&NV':
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改进后的归并排序: M|K^u.4
j}eb _K+I
package org.rut.util.algorithm.support; DkEv1]6JI_
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import org.rut.util.algorithm.SortUtil; ~(ke'`gJ0-
G:":CX"O(
/** jh)@3c
* @author treeroot (+epRC
* @since 2006-2-2 7!pKlmQ
* @version 1.0 DJL.P6-W
*/ <cp9+P <
public class ImprovedMergeSort implements SortUtil.Sort { 'v~'NWfd
PnA{@n\
private static final int THRESHOLD = 10; JRo/ HY+
`.@sux!lu
/* 0DmA3
* (non-Javadoc) xBVOIc[4(
* BZ?Ck[E]Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |cf-S8pwY
*/ TXmS$q
public void sort(int[] data) { 5b7(^T^K
int[] temp=new int[data.length]; kFWwz^x
mergeSort(data,temp,0,data.length-1); {h7 vJ^
} *G> x07S)~
|(z{)yWbC[
private void mergeSort(int[] data, int[] temp, int l, int r) { &,k!,<IF
int i, j, k; M`H#Qo5/
int mid = (l + r) / 2; 78uImC*o
if (l == r) q2vD)r
return; 1N8] ~j
if ((mid - l) >= THRESHOLD) UxTLr-db^
mergeSort(data, temp, l, mid); lD0-S0i
else 6M*z`B{hV
insertSort(data, l, mid - l + 1); q>.7VN[ vE
if ((r - mid) > THRESHOLD) d#rr7O
mergeSort(data, temp, mid + 1, r); fd&Fn=!
else q()o|V
insertSort(data, mid + 1, r - mid); T,pr&1]Lw
/GIGE##1F
for (i = l; i <= mid; i++) { xo_STLAw
temp = data; rMDvnF
} rF-SvSj}
for (j = 1; j <= r - mid; j++) { *#mmk1`
temp[r - j + 1] = data[j + mid]; (BVqmi{
} C e-ru)
int a = temp[l]; &-yRa45?
int b = temp[r]; K {' atc
for (i = l, j = r, k = l; k <= r; k++) { p|-MwCeH
if (a < b) { SN}K=)KF#
data[k] = temp[i++]; DWt|lO
a = temp; K6IT$$g
} else { .[O{,r
data[k] = temp[j--]; 2`$*HPj+G
b = temp[j]; gT+g@\u[
} a|7C6#iz$
} /:4J
} L/tpT?$fi
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/** 4H-eFs%5
* @param data yxt"vm;
* @param l :W*yfhLt
* @param i <T}U 3lL^
*/ L7C ;l,ot
private void insertSort(int[] data, int start, int len) { s|Mo3_>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |u>(~6
} x.+T65X~4
} %Rc#/y
} xpR`fq
} 1&=)Bxg4
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堆排序： \Ggh 95y
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package org.rut.util.algorithm.support; Ib#-M;{
bej(Ds0
import org.rut.util.algorithm.SortUtil; ]->"4,}
S;% &X
/** ,<Q
* @author treeroot pWV_KS
* @since 2006-2-2 6nW)2LV
* @version 1.0 PlkZ)S7C
*/ loVg{N:
public class HeapSort implements SortUtil.Sort{ Fc5.?X-
PAYw:/(P
/* (non-Javadoc) O+}py{ st
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N#T'}>ty
*/ ^jMrM.GY
public void sort(int[] data) { + `|A/w
MaxHeap h=new MaxHeap(); s:3[#&PQpN
h.init(data); o9eOp3w30
for(int i=0;i h.remove(); "JB4Uaa
System.arraycopy(h.queue,1,data,0,data.length); Tx;a2:6\[
} =NF0E8O
#rkq ?:Q
private static class MaxHeap{ 'C'mgEl%L
zXY8:+f
void init(int[] data){ ZyGoOk
this.queue=new int[data.length+1]; [:y:_ECs6
for(int i=0;i queue[++size]=data; T8o](:B~
fixUp(size); B)JMughq_
} JQ03om--(
} :wC\IwG~CE
:0J`4
private int size=0; >(Y CZ
<YaTr9%w
private int[] queue; LiG$M{0
Z2g'&,uc#
public int get() { |.N[NY
return queue[1]; d_!Z /M,
} 3`^@ymY
Y9)j1~
public void remove() { k*$WAOJEW
SortUtil.swap(queue,1,size--); Nz dN4+
fixDown(1); ukiWNF/
} aK_5@8+ZD
file://fixdown F)^0R%{C
private void fixDown(int k) { :21d
int j; :$k*y%Z*N&
while ((j = k << 1) <= size) { h&>3;Lj
if (j < size %26amp;%26amp; queue[j] j++; {kpF etXt?
if (queue[k]>queue[j]) file://不用交换 _SBbd9
break; X8)k'h
SortUtil.swap(queue,j,k); 4IeCb?
k = j; l f>/
} k =! Q
} {MgRi7
private void fixUp(int k) { xKUL}>8
while (k > 1) { 2%%\jlT_
int j = k >> 1; =]7o+L4
if (queue[j]>queue[k]) p!UR;xHI\
break; ALMsF2H
SortUtil.swap(queue,j,k); o2!738
k = j; T9nb ~P[
} ? :H+j6+f
} S{=5nR9j
jK w 96
} G2`z?);1b
~5KcbGD~
} `c
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SortUtil： k\f _\pj6
meX2Y;
package org.rut.util.algorithm; J2z/XHS
%qc_kQ5%
import org.rut.util.algorithm.support.BubbleSort; 6 s=VU\
import org.rut.util.algorithm.support.HeapSort; 9!( 8o
import org.rut.util.algorithm.support.ImprovedMergeSort; Aw#<:6-
import org.rut.util.algorithm.support.ImprovedQuickSort; (]]hSkE
import org.rut.util.algorithm.support.InsertSort; !xsfhLZK
import org.rut.util.algorithm.support.MergeSort; *vb"mB
import org.rut.util.algorithm.support.QuickSort; vIV|y>;g
import org.rut.util.algorithm.support.SelectionSort; ,Z{\YAh1
import org.rut.util.algorithm.support.ShellSort; 8b/$Qp4d
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/** [IYVrT&C'
* @author treeroot c1f"z1Z
* @since 2006-2-2 :33@y%>L
* @version 1.0 @Xo*TJB
*/ PT/Nz+
public class SortUtil { I6.rN\%b
public final static int INSERT = 1; c-+NWC
public final static int BUBBLE = 2; }A3/(
public final static int SELECTION = 3; =D1
public final static int SHELL = 4; _p )NZ7yC
public final static int QUICK = 5; y'2|E+*V
public final static int IMPROVED_QUICK = 6; AB3_|Tza~&
public final static int MERGE = 7; ~q`!928Gu
public final static int IMPROVED_MERGE = 8; }5 rR^ryA
public final static int HEAP = 9; xM jn=\}
@| z _&E
public static void sort(int[] data) { ~c)&9'
sort(data, IMPROVED_QUICK); 26j<>>2
} M$K%e
private static String[] name={ (`.# n3{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pD{OB
}; Q#g`D,:o%~
8V:;HY#
private static Sort[] impl=new Sort[]{ <C`bf$ak
new InsertSort(), EFX2>&mWo8
new BubbleSort(), [q9B"@X
new SelectionSort(), 0*{(R#
new ShellSort(), \YvG+7a
new QuickSort(), OUBGbld
new ImprovedQuickSort(), D3Q+K
new MergeSort(), &N}"4
new ImprovedMergeSort(), e9LX0=
new HeapSort() ~` tuPk~l
}; 0Ui.nz j
$TUYxf0q
public static String toString(int algorithm){ GHv6UIe&
return name[algorithm-1]; x=*&#;Y|
} !ku}vTe
'kd}vq#|
public static void sort(int[] data, int algorithm) { 63fYX"
impl[algorithm-1].sort(data); )@wC6Ij
} e;.,x 5+
{5dVK
public static interface Sort { 't<iB&wgF
public void sort(int[] data); j)J |'b|
} dseI~}
i~u4v3r=
public static void swap(int[] data, int i, int j) { j<^!"_G]*?
int temp = data; 5%,3)H{;t
data = data[j]; Zl>SeTjB-
data[j] = temp; ^6W}ZLp
} k~[jk5te
} #49l\>1z