[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; wko2M[
} Hg whe=P
int i1=l; Kj!Y K~~
int i2=mid+1; VDa|U9N
for(int cur=l;cur<=r;cur++){ SUu >6'LN
if(i1==mid+1) >a@>N
data[cur]=temp[i2++]; +?V0:Kz]
else if(i2>r) [+gzdLad
data[cur]=temp[i1++]; l&|)O6N
else if(temp[i1] data[cur]=temp[i1++]; &k+*3.X
else ev"M;"y
data[cur]=temp[i2++]; r=$gT@
} WIG=D{\Yx
} N7pt:G2~%
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} ?Pnx~m{%*
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改进后的归并排序: r--;yEjWE
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package org.rut.util.algorithm.support; ugxw!cj
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import org.rut.util.algorithm.SortUtil; f~*K {7
ttj2b$M,
/** `:4MMr91
* @author treeroot 50,Y
* @since 2006-2-2 O9*p0%ug
* @version 1.0 `p1DaV
*/ S+pP!YX
public class ImprovedMergeSort implements SortUtil.Sort { \xeVDKJH+n
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private static final int THRESHOLD = 10; 6w!e?B2/%
L=m:/qQL
/* a2X h>{
* (non-Javadoc) zAI|Jv@
* b^Z$hnh]S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u G[!w!e
*/ N8 M'0i?
public void sort(int[] data) { *%?d\8d
int[] temp=new int[data.length]; XN(tcdCG
mergeSort(data,temp,0,data.length-1); <soj&f+
} PI63RH8e
)UP8#|$#T
private void mergeSort(int[] data, int[] temp, int l, int r) { k(v"B@0
int i, j, k; uS-3\$
int mid = (l + r) / 2; 6F-JK1i
if (l == r) J[r^T&o
return; <A{y($
if ((mid - l) >= THRESHOLD) u}m.}Mws
mergeSort(data, temp, l, mid); K7Gm-=%
else ] R<FKJ[
insertSort(data, l, mid - l + 1); !&JiNn('
if ((r - mid) > THRESHOLD) phS>T
mergeSort(data, temp, mid + 1, r); 3KT_AJ4}
else ngLJ@TP-
insertSort(data, mid + 1, r - mid); xx0k$Dqt2I
"Y(^F bs
for (i = l; i <= mid; i++) { oXbI5XY)wb
temp = data; EZ{/]gCK
} O%VA)<
for (j = 1; j <= r - mid; j++) { _k|g@"
temp[r - j + 1] = data[j + mid]; 6?!I
} Pxk0(oBX
int a = temp[l]; C d|W#.6
int b = temp[r]; wibwyzo
for (i = l, j = r, k = l; k <= r; k++) { `I{tZ$iD
if (a < b) { 117c,yM0
data[k] = temp[i++]; v~aLTI
a = temp; u{P~zyx
} else { P{Lg{I_w.B
data[k] = temp[j--]; eK*W=c#@
b = temp[j]; jiq2x\\!
} !3?yG
} 44j,,k
} ;le0QA Pf
D>Ua#<52q
/** jOv~!7T
* @param data qS|AdkNL
* @param l "]UIz_^'`U
* @param i ez+yP,.#
*/ aH
private void insertSort(int[] data, int start, int len) { Pr2;Kp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y.X4*B
} ([tG y
} N"K\ick6J
} h&P {p _Y
} xRB7lV*
@'Q%Jc(
堆排序： POY=zUQ'/
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package org.rut.util.algorithm.support; E)Srj~$d
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import org.rut.util.algorithm.SortUtil; ho_4fDv
{<r`5
/** #.b^E3#+
* @author treeroot "&}mAWT%If
* @since 2006-2-2 w~n kNqm
* @version 1.0 BPqwDjW
*/ 'Nw6.5
public class HeapSort implements SortUtil.Sort{ zaBG=
u,\xok"
/* (non-Javadoc) (c<f<D|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RpjSTV8Tkm
*/ \"t`W:
public void sort(int[] data) { r.9 $y/5
MaxHeap h=new MaxHeap(); 8>m1UONr
h.init(data); )#Y|ngZ_>
for(int i=0;i h.remove(); UFos E|r:
System.arraycopy(h.queue,1,data,0,data.length); +*<K"H|,
} XA?WUR[e
`k!UjO72
private static class MaxHeap{ sC9-+}
ea>[BB3#
void init(int[] data){ wD}EW
this.queue=new int[data.length+1]; _m" ^lo
for(int i=0;i queue[++size]=data; 4sI3(z)9H
fixUp(size); x)d2G6x
} wqf&i^_
} tG_-;03<`4
WVinP(#nfM
private int size=0; 7f[8ED[4
z(#=tC|
private int[] queue; [rc'/@L
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public int get() { 0:s8o@}
return queue[1]; g:;Ya?5N
} !\3}R25
Qf"6PJ
public void remove() { s!NisF
SortUtil.swap(queue,1,size--); `I@)<d
fixDown(1); cj`#Tg.
} ,b.kw}k
file://fixdown r,QJG$ Jo
private void fixDown(int k) { GCZu<,
int j; V2lp7"
while ((j = k << 1) <= size) { on6<l
if (j < size %26amp;%26amp; queue[j] j++; .0?ss0~
if (queue[k]>queue[j]) file://不用交换 G[y&`Qc)G
break; ]<Z&=0i#9
SortUtil.swap(queue,j,k); -aC!0O y`
k = j; IruyE(;HS
} G3oxa/mO
} #*[,woNk
private void fixUp(int k) { 2lX[hFa5
while (k > 1) { vI4%d,
int j = k >> 1; \YjB+[.
if (queue[j]>queue[k]) 3x,Aczb
break; 4S^
SortUtil.swap(queue,j,k); "9TxK6
k = j; O7!fI'R
} dCW0^k
} |zK!+fu
lR|$*:+
} 6JUav."`~
3we.*\2$
} nLzX Z6JlU
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SortUtil： {hlT`K
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package org.rut.util.algorithm; +#^sy>
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import org.rut.util.algorithm.support.BubbleSort; QJ[(Y@ O6a
import org.rut.util.algorithm.support.HeapSort; {yGZc3e1j
import org.rut.util.algorithm.support.ImprovedMergeSort; Kc%tnVyGh:
import org.rut.util.algorithm.support.ImprovedQuickSort; G~Sy&XJuq
import org.rut.util.algorithm.support.InsertSort; &C CHxjsKR
import org.rut.util.algorithm.support.MergeSort; Sn_z
import org.rut.util.algorithm.support.QuickSort; wjN`EF5$}&
import org.rut.util.algorithm.support.SelectionSort; u>JqFw1
import org.rut.util.algorithm.support.ShellSort; p,3go[9X:R
Z5"!0B^ j
/** 6GvhEulYR
* @author treeroot Vp5V m
* @since 2006-2-2 ;9 =}_h)]
* @version 1.0 QwKky ^A
*/ NN31?wt
public class SortUtil { #fJ/KYJU
public final static int INSERT = 1; uzat."`d'
public final static int BUBBLE = 2; _|Y.!ZRYP
public final static int SELECTION = 3; !7kAJG g
public final static int SHELL = 4; :Vu7,o
public final static int QUICK = 5; Dx p>
public final static int IMPROVED_QUICK = 6; }rFsU\]:q
public final static int MERGE = 7; i{%z
public final static int IMPROVED_MERGE = 8; /1[}G!
public final static int HEAP = 9; 'LtgA|c=
>$#*`6R
public static void sort(int[] data) { M6@'9E]|>
sort(data, IMPROVED_QUICK); z7NGpA(
} ;'b!7sMO~
private static String[] name={ &>+I7Ts]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3n}sCEt=
}; WHhR)$zC
mcAH1k e
private static Sort[] impl=new Sort[]{ [Gh%nsH
new InsertSort(), "@UU[o
new BubbleSort(), (ffOu#RQ3
new SelectionSort(), 9RCB$Ka6X
new ShellSort(), *il]$i
new QuickSort(), Vz=j)[
new ImprovedQuickSort(), \N'hbT=
new MergeSort(), mGMinzf
new ImprovedMergeSort(), m!FM+kge
new HeapSort() iXr`0V
}; Ivd[U`=Q
/ze_{{o
public static String toString(int algorithm){ ;XKo44%
return name[algorithm-1]; pqGf@24c<
} c_D,MW\IC
Up1$xLSl
public static void sort(int[] data, int algorithm) { c(_oK ?
impl[algorithm-1].sort(data); os"[Iji
} ?%8})^Dd>4
TnMVHO-
public static interface Sort { >8F{lbEe
public void sort(int[] data); s)`1Rf
} g4.'T51
{Q#Fen ;y|
public static void swap(int[] data, int i, int j) { ~L4*b*W
int temp = data; b_K?ocq
data = data[j]; r(?'Yy
data[j] = temp; 0k]ju
} hM1&A
} qxecp2>U