[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; =n^!VXaL]]
} L=2y57&Y
int i1=l; st"{M\.p
int i2=mid+1; t9&cE:n
for(int cur=l;cur<=r;cur++){ ?JV|dM
if(i1==mid+1) Tirux ;
data[cur]=temp[i2++]; x^"ES%*
else if(i2>r) IHgeQ F ~
data[cur]=temp[i1++]; kc/{[ME
else if(temp[i1] data[cur]=temp[i1++]; b{fQ|QD{^E
else |F.)zC5{
data[cur]=temp[i2++]; o!:8nXw
} "<}&GcJbz
} ]"c+sMW
5Z4-Z
} >3awn*N
^kST
改进后的归并排序: SXao|{?O
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package org.rut.util.algorithm.support; 6#j$GH *
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import org.rut.util.algorithm.SortUtil; B?$ "\;&
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/** nhG J
* @author treeroot 4tSv{B/}
* @since 2006-2-2 ) 'j:
* @version 1.0 b$k&dT\o
*/ =)O,`.M.Y
public class ImprovedMergeSort implements SortUtil.Sort { c!8=lrT.
56l@a{
private static final int THRESHOLD = 10; syip;;
h7s;m
/* yqSs,vz
* (non-Javadoc) tNVV)C
* m]*Bx%-1c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k%y9aO
*/ 1 nvTce
public void sort(int[] data) { vIvVq:6_3
int[] temp=new int[data.length]; A]L%dFK
mergeSort(data,temp,0,data.length-1); 3:%QB9qc]'
} KJE[+R H+z
yT{8d.Rh
private void mergeSort(int[] data, int[] temp, int l, int r) { q9"=mO0J+
int i, j, k; p0.|<
int mid = (l + r) / 2; (;. AS
if (l == r) ND<!4!R^
return; ~.%K/=wK@
if ((mid - l) >= THRESHOLD) eT'nl,e|
mergeSort(data, temp, l, mid); ,Ma.V\T[
else 4'KOp&#l K
insertSort(data, l, mid - l + 1); ^$%Z!uz
if ((r - mid) > THRESHOLD) :V)lbn\
mergeSort(data, temp, mid + 1, r); +!f=jg06
else H"2uxhdLK3
insertSort(data, mid + 1, r - mid); 2cu#lMq
7?OH,^
for (i = l; i <= mid; i++) { ,wKe fpV;5
temp = data; */ G<!W
} )'l*Tl
for (j = 1; j <= r - mid; j++) { UZ8?[
temp[r - j + 1] = data[j + mid]; vi@Lz3}::
} @v\*AYr'M
int a = temp[l]; *`( <'Z
int b = temp[r]; bbxLBD'
for (i = l, j = r, k = l; k <= r; k++) { z9W`FBg
if (a < b) { _w@qr\4i=
data[k] = temp[i++]; %hlspI(J
a = temp; SPj><5Ro
} else { K; FW
data[k] = temp[j--]; ~-a'v!
b = temp[j]; k {-
} %7Kooq(i
} 2A4FaBq"
} +Taa!hfys
Es5
/** HG/p$L*
* @param data uGdp@]z&8Q
* @param l -{h
* @param i _<ut)G^9
*/ N__H*yP
private void insertSort(int[] data, int start, int len) { 4^6.~6a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \EbbkN:D
} +@X5!S6
} vUC!fIG
} {Hr$wa~
} u%2<\:~j
4t4olkK3Oa
堆排序： 2EQ6J
lC97_T
package org.rut.util.algorithm.support; .AV)'j#6P
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import org.rut.util.algorithm.SortUtil; 0f ER*.F
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/** [%HIbw J
* @author treeroot G@S&1=nj3
* @since 2006-2-2 8:ggECD
* @version 1.0 <<MjC5
*/ %IL6ix
public class HeapSort implements SortUtil.Sort{ ;D ~L|
eX&Gw{U-f
/* (non-Javadoc) D-9\~gvh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b hjZ7=
*/ ,KW;2t*IQ@
public void sort(int[] data) { HU B|bKy
MaxHeap h=new MaxHeap(); ?y},,
h.init(data); x:K?\<
for(int i=0;i h.remove(); Ft%hh|$5y
System.arraycopy(h.queue,1,data,0,data.length); bC@k>yC-
} jyW[m,#(go
gLj?Ys
private static class MaxHeap{ -237Lx$/
(g/7yO(s
void init(int[] data){ OVoO6F]
this.queue=new int[data.length+1]; kD~uGA
for(int i=0;i queue[++size]=data; ~M?|Vn
fixUp(size); ZIxRyo-i
} ,W5.:0Y;f[
} ;##]G=%
y93k_iq$S
private int size=0; "#^MUQ!a
XOrfs sj
private int[] queue; p(3sgY1
7-iIay1h"
public int get() { ka7uK][
return queue[1]; +KK$0pL
} :jNYP{Br
V: p)m&y6
public void remove() { mE$dO3
SortUtil.swap(queue,1,size--); 0TE@xqW
fixDown(1); J2Et-Cz1
} Z-Wfcnk
file://fixdown i1*C{Lf;%)
private void fixDown(int k) { dBEIMn@
int j; cFfTYP9
while ((j = k << 1) <= size) { =TcOnQj
if (j < size %26amp;%26amp; queue[j] j++; y]qsyR18i
if (queue[k]>queue[j]) file://不用交换 /J%do]PDl
break; 2/Nq'
SortUtil.swap(queue,j,k); VZxTx0: ,
k = j; U^#?&u
} 'Tf9z+0;
} swr"k6;G
private void fixUp(int k) { f'/ KMe%<
while (k > 1) { W}gVIfe
int j = k >> 1; cK}Pf+r>
if (queue[j]>queue[k]) \XH@b6{
break; r%MyR8'k]
SortUtil.swap(queue,j,k); sWxK~Yg
k = j; 0<P(M:a
} +^Jwo)R'b
} OhWC}s
yjZ2 if
} JieU9lA^&B
az(5o
} jb@\i@-
c cr" ep
SortUtil： z-Hkz
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package org.rut.util.algorithm; HWtPLlNt
<q6`~F~|
import org.rut.util.algorithm.support.BubbleSort; oS!/|#mn
import org.rut.util.algorithm.support.HeapSort; ~{QEL2
import org.rut.util.algorithm.support.ImprovedMergeSort; 0VG=?dq
import org.rut.util.algorithm.support.ImprovedQuickSort; NG-`ag`s
import org.rut.util.algorithm.support.InsertSort; x-~-nn\O
import org.rut.util.algorithm.support.MergeSort; 2]Fu 1
import org.rut.util.algorithm.support.QuickSort; >\\5"Sf
import org.rut.util.algorithm.support.SelectionSort; =YoTyq\
import org.rut.util.algorithm.support.ShellSort; 4!'1/3cY
)+B=z}:Nfz
/** %F3}/2
* @author treeroot u[[/w&UV.,
* @since 2006-2-2 03"#J2b
* @version 1.0 .CmL7 5
*/ 5`yPT>*#m>
public class SortUtil { S-,kI
public final static int INSERT = 1; .HOY q
public final static int BUBBLE = 2; G-8n
public final static int SELECTION = 3; 0~i qG
public final static int SHELL = 4; >Jiij
public final static int QUICK = 5; #Y: ~UVV
public final static int IMPROVED_QUICK = 6; yA0Y 14\*
public final static int MERGE = 7; +9~ZA3DiP
public final static int IMPROVED_MERGE = 8; ahoh9iJ
public final static int HEAP = 9; qa;EI ;8
I$Eg$q
public static void sort(int[] data) { 0$?qoS
sort(data, IMPROVED_QUICK); |w,^"j2R
} [wIKK/O
private static String[] name={ SNxz*`@4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XWf7"]%SX
}; {Ot[WF
(V^QQ !:
private static Sort[] impl=new Sort[]{ @|]iSD&T #
new InsertSort(), nYgx9Q"<om
new BubbleSort(), ~q5-9{ma
new SelectionSort(), %N1T{
new ShellSort(), !yk7HaP
new QuickSort(), +}\29@{W
new ImprovedQuickSort(), 5bF5~D(E
new MergeSort(), ew/KZE
new ImprovedMergeSort(), w[M5M2CF
new HeapSort() 'H FwP\HX
}; k\%,xf; x
{\F2*P
public static String toString(int algorithm){ wo$|~ Hr
return name[algorithm-1]; ul}4p{ m[
} @s3aR*ny$
J1& A,Gb
public static void sort(int[] data, int algorithm) { #Xj;f^}/
impl[algorithm-1].sort(data); 1.uUMW
} MQjG<O\
rR3m'[
public static interface Sort { TR+Q4Y:
public void sort(int[] data); % d4+Ctrp-
} *C tsFS~
7BVXBw
public static void swap(int[] data, int i, int j) { HarYV :
int temp = data; ]gjr+GV
data = data[j]; 6MrZ6dz^
data[j] = temp; 4|I7:~
} 70d] d+M|
} k{zs578h2