[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; @:9Gs!!
} Gb\PubJ
int i1=l; Dz6xx?
int i2=mid+1; 3yKmuu!
for(int cur=l;cur<=r;cur++){ m\0_1 #(
if(i1==mid+1) /~{`!30
data[cur]=temp[i2++]; Rt+-ud{O
else if(i2>r) U\tx{CsSz
data[cur]=temp[i1++]; l9&k!kF`
else if(temp[i1] data[cur]=temp[i1++]; {XmCG%%L
else 4F6aPo2
data[cur]=temp[i2++]; WJnGF3G>
} @CmKF
} :1>?:3,`
W H/.h$
} n%7?G=_kj
@nY]S\if
改进后的归并排序: src+z#
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package org.rut.util.algorithm.support; x~!|F5JbM
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import org.rut.util.algorithm.SortUtil; &btI#
"U-jZ5o"
/** ~! -JN}H m
* @author treeroot mnsl$H_4S
* @since 2006-2-2 XAU%B-l:
* @version 1.0 QE\ [EI2
*/ ?Z7QD8N
public class ImprovedMergeSort implements SortUtil.Sort { Tz,9>uN
-PE_qZ^
private static final int THRESHOLD = 10; m"iA#3l*=
nm,LKS7
/* F^NK"<tW
* (non-Javadoc) o6k#neB>=.
* $zjdCg<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Km8aHc]O~
*/ D![v{0er
public void sort(int[] data) { T+F]hv'
int[] temp=new int[data.length]; 0\= du
mergeSort(data,temp,0,data.length-1); TB!I
} -$Hu$Y}>
k6;bUOo
private void mergeSort(int[] data, int[] temp, int l, int r) { EyE#x_A
int i, j, k; Z_\p8@3aH
int mid = (l + r) / 2; w31Ox1>s
if (l == r) QkdcW>:a7
return; hu.o$sV3;
if ((mid - l) >= THRESHOLD) :lcq3iFn
mergeSort(data, temp, l, mid); .+/d08]
else d}[cX9U/
insertSort(data, l, mid - l + 1); v\Uk?V5T
if ((r - mid) > THRESHOLD) 4V')FGB$
mergeSort(data, temp, mid + 1, r); Dp ](?Yr
else rR> X<
insertSort(data, mid + 1, r - mid); S=(O6+U
o[Jzx2A<
for (i = l; i <= mid; i++) { Go)$LC0Mi
temp = data; }|kFHodo
} k||t<&`Ze
for (j = 1; j <= r - mid; j++) { S'jg#*$
temp[r - j + 1] = data[j + mid]; T$xBH
} ;/j2(O^
int a = temp[l]; ukW&\
int b = temp[r]; FQDf?d5
for (i = l, j = r, k = l; k <= r; k++) { [X.bR$>
if (a < b) { 6QX m]<
data[k] = temp[i++]; `OBzOM
a = temp; kt/,& oKI
} else { s{Z)<n03
data[k] = temp[j--]; 6st
b = temp[j]; :CyHo6o9
} J,2V&WuV0r
} X g6ezlW
} FPDTw8" B;
CI'RuR3y]Z
/** vjuFVJwL
* @param data 50^ux:Uv+N
* @param l p+h$]CH
* @param i ]dpL PR
*/ ;Y?MbD
private void insertSort(int[] data, int start, int len) { hJ@vlMW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f~`=I NrU
} Q5+1'mzAB
} 'dLw8&T+W
} J?QS7#!%
} -b(DPte
{ qNPhi
堆排序： HeRi67
L=r*bq
package org.rut.util.algorithm.support; *VZ|Idp
cuhp4!!
import org.rut.util.algorithm.SortUtil; \HfAKBT
]ordqulq1
/** )(G9[DG
* @author treeroot HC%Hbc~S_Q
* @since 2006-2-2 .A2$C|a*
* @version 1.0 =&WIa#!=
*/ Ttluh *
public class HeapSort implements SortUtil.Sort{ 8D='N`cN+
Jj"{C]
/* (non-Javadoc) {>f"&I<xw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1@F-t94I
*/ ZEP?~zV\A
public void sort(int[] data) { +1ICX
MaxHeap h=new MaxHeap(); VfX^iG r
h.init(data); 4<y
for(int i=0;i h.remove(); 8QrpNSj4
System.arraycopy(h.queue,1,data,0,data.length); 4l$OO;B
} k?+ 7%A]
l|P"^;*zq
private static class MaxHeap{ B*(]T|ff<
p)y5[HX
void init(int[] data){ j/O~8o&
this.queue=new int[data.length+1]; i5VZ,E^E
for(int i=0;i queue[++size]=data; )6OD@<r{
fixUp(size); 7n8nJTU{4j
} ^3;B4tj[
} -*C WF|<G
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private int size=0; D}_.D=)
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private int[] queue; v@_1V
uoS:-v}/Y~
public int get() { G{U#9
return queue[1]; IiU>VLa
} i\i%WiRl
U\KMeaF5e-
public void remove() { M.W X&;>
SortUtil.swap(queue,1,size--); qX\*lm/l
fixDown(1); 3U[O :
} U"PcNQy
file://fixdown Hn|W3U
private void fixDown(int k) { )4yP(6|lx
int j; 8dGsV5"*
while ((j = k << 1) <= size) { X0/slOT
if (j < size %26amp;%26amp; queue[j] j++; NJUKH1lIhR
if (queue[k]>queue[j]) file://不用交换 GWA"!~Hu
break; IDohv[#
SortUtil.swap(queue,j,k); b}[S+G-9W
k = j; 3Z!%td5n
} 1EyN |m|
} k# [!; <
private void fixUp(int k) { <LHhs<M'
while (k > 1) { tW\yt~q,
int j = k >> 1; "r9Rr_, >
if (queue[j]>queue[k]) YKyno?m
break; ;J%:DD
SortUtil.swap(queue,j,k); s|=lKa]d!"
k = j; Q Be6\oq
} d>QFmsh-
} HBlk~eZ
50,'z?-_
} D|-]<r1"
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} 1-2hh)
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SortUtil： \TV
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package org.rut.util.algorithm; LgqQr6y"
hlzB cz*
import org.rut.util.algorithm.support.BubbleSort; O2w-nd74U
import org.rut.util.algorithm.support.HeapSort; zF1!a
import org.rut.util.algorithm.support.ImprovedMergeSort; Abc{<4 z0?
import org.rut.util.algorithm.support.ImprovedQuickSort; f1 ;
import org.rut.util.algorithm.support.InsertSort; VD;*UkapZx
import org.rut.util.algorithm.support.MergeSort; ^HKXm#vAB
import org.rut.util.algorithm.support.QuickSort; oaIk1U;g
import org.rut.util.algorithm.support.SelectionSort; ~k"+5bHa*
import org.rut.util.algorithm.support.ShellSort; '6so(>|
g'"~'
/** #}`sfaT
* @author treeroot ~6G `k^!
* @since 2006-2-2 >jm(2P(R
* @version 1.0 J4Gzp~{
*/ 6Yu:v
public class SortUtil { Obs#2>h
public final static int INSERT = 1; djd/QAfSC
public final static int BUBBLE = 2; 9vI~vl l
public final static int SELECTION = 3; $7x2TiAL
public final static int SHELL = 4; Cf% qap#
public final static int QUICK = 5; S 'a- E![
public final static int IMPROVED_QUICK = 6; :eN&wQ5q
public final static int MERGE = 7; 7^L
public final static int IMPROVED_MERGE = 8; 0vY_
public final static int HEAP = 9; <,i4Ua
oPe|Gfv\G
public static void sort(int[] data) { ~?Zib1f)
sort(data, IMPROVED_QUICK); 9`in r.:
} X\^V{v^-
private static String[] name={ A5<t>6Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H$![]Ujq
}; 6o't3Peh
c-w #`
private static Sort[] impl=new Sort[]{ *z0!=>(
new InsertSort(), S?~0)EXj(
new BubbleSort(), Q,U0xGGz
new SelectionSort(), zsL@0]e&
new ShellSort(), 4cjfn'x
new QuickSort(), !=0h*=NOYt
new ImprovedQuickSort(), uibmQ|AQ
new MergeSort(), #QNN;&L]R
new ImprovedMergeSort(), %:3XYO.w-
new HeapSort() f{BF%;
}; VjQ&A#
EX,>V,.UV
public static String toString(int algorithm){ >|f"EK}m!
return name[algorithm-1]; uwwR$ (\7
} gOF^?M11x
`YhGd?uu$
public static void sort(int[] data, int algorithm) { 8>KUx]AN
impl[algorithm-1].sort(data); yw1&I^7
} DDE-$)lf>
%>+uEjbT
public static interface Sort { zPt<b!q
public void sort(int[] data); `Ba]i)!
} :So<N}&
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public static void swap(int[] data, int i, int j) { fi?4!h
int temp = data; DbGS]k<$
data = data[j]; O8]e(i
data[j] = temp; PTe L3L
} C`5'5/-.
} yl[I'fX66