[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; 6MsVV_/
} 5W%^g_I
int i1=l; Yz"B
int i2=mid+1; [WZGu6$SU
for(int cur=l;cur<=r;cur++){ !'yCB9]O
if(i1==mid+1) VTM*=5|c
data[cur]=temp[i2++]; OAlV7cfD
else if(i2>r) t(d$v_*y51
data[cur]=temp[i1++]; g7Xjo )
else if(temp[i1] data[cur]=temp[i1++]; DcjF$E
else |AgdD
data[cur]=temp[i2++]; j%_{tB
} ?%)G%2
} 1a_R8j
D7v-+jypp
} }bkQr)us
Vp"=8p#k
改进后的归并排序: \L6kCY
"e)C.#3
package org.rut.util.algorithm.support; b-'T>1V
k&oq6!ix
import org.rut.util.algorithm.SortUtil; o p{DPUO0
NoSq:e
/** WD`z\{hcom
* @author treeroot 45?aV@
* @since 2006-2-2 'r/+za:2
* @version 1.0 ]6)~Sj$ 5
*/ fv;3cxQp
public class ImprovedMergeSort implements SortUtil.Sort { |<:Owd=
U"SH fI:
private static final int THRESHOLD = 10; ,}8|[)"
F},#%_4
/* Hj\iI p
* (non-Javadoc) .N:& {$o:
* 9YMD[H\}V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bQTkW<7gh
*/ nu=yE$BN{
public void sort(int[] data) { Njp?/r
int[] temp=new int[data.length]; Rix|LKk{
mergeSort(data,temp,0,data.length-1); Y! 8 I
} 3izGMH_`
(vO\h8
private void mergeSort(int[] data, int[] temp, int l, int r) { +1uAzm4SL
int i, j, k; \E}YtN#
int mid = (l + r) / 2; 2cnyq$4k
if (l == r) j'\!p):H
return; f*(W%#*|
if ((mid - l) >= THRESHOLD) Q/u2Q;j>
mergeSort(data, temp, l, mid); a;GuFnfn,
else xAZ-_}'tW
insertSort(data, l, mid - l + 1); _klT
if ((r - mid) > THRESHOLD) e-@.+f2CC
mergeSort(data, temp, mid + 1, r); sWG_MEbu
else W`vgH/lSnZ
insertSort(data, mid + 1, r - mid); "A4.2
[5"F=tT7WP
for (i = l; i <= mid; i++) { sYMgi D
temp = data; m|/q o
} g`n5-D@3
for (j = 1; j <= r - mid; j++) { < 2mbR
temp[r - j + 1] = data[j + mid]; K[j~htC{I"
} ],?$&
int a = temp[l]; 3RbPc8($Y
int b = temp[r]; neLQ>WT L
for (i = l, j = r, k = l; k <= r; k++) { ^KlW"2:
if (a < b) { %U<1]
data[k] = temp[i++]; &/\Q6$a
a = temp; l-mt{2
} else { 1xf Pe#
data[k] = temp[j--]; )XFaVkQ}
b = temp[j]; I1Jhvyd?$
} K}OY!|
} j=],n8_i
} Ra!Br6
D_)i%k\
/** Yg~$1b@
* @param data ukInS:7
* @param l #a$k3C
* @param i *vqr+jr9
*/ 0t^Tm0RzH
private void insertSort(int[] data, int start, int len) { eBN!!Y:7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P {0iEA|k
} wf,B/[,d
} ab!Cu8~v
} Y3n6y+Uzk
} }w|a^=HAp
}%}yOLo:
堆排序： T {![a{
lL$no7HBy
package org.rut.util.algorithm.support; }G3:QD
9&O7F}VP2
import org.rut.util.algorithm.SortUtil; ?D,8lABkT
|[3%^!f\
/** phc9esz
* @author treeroot JNx;/6'd,
* @since 2006-2-2 3~ptD5@WF
* @version 1.0 nf2[hx@=U
*/ $xK*TJ(k
public class HeapSort implements SortUtil.Sort{ v>!tws5e
{gkY:$xnrG
/* (non-Javadoc) 9sId2py]W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z`jSpgWR
*/ VUQx"R9-
public void sort(int[] data) { "3Lq/mJYnZ
MaxHeap h=new MaxHeap(); OMz_xm.UPi
h.init(data); QIWfGVc-
for(int i=0;i h.remove(); P2t9RCH
System.arraycopy(h.queue,1,data,0,data.length); )J>-;EYb8
} 9e _8Z@|
Qk)E:
private static class MaxHeap{ aS3Fvk0R{h
1Y6DzWI
void init(int[] data){ [vNaX%o
this.queue=new int[data.length+1]; (j%;)PTe+&
for(int i=0;i queue[++size]=data; B*AF8wX|
fixUp(size); ] v8.ym
} ~2L]K4Z^
} Zk*!,,P!
1(`UzC=R|
private int size=0; Pe`eF(J
M\!z='Fi
private int[] queue; ibqJ'@{=e
1$toowb"Zy
public int get() { :H8`z8=0f{
return queue[1]; )r`F}_CEL
} mNDd>4%H_
CYHo~VIK
public void remove() { g54b}vzm
SortUtil.swap(queue,1,size--); y yqya[-11
fixDown(1); Kd|@
} @ rG=>??k
file://fixdown @@pI>~#zh
private void fixDown(int k) { 8Rric[v
int j; ?Mj@;O9>'
while ((j = k << 1) <= size) { 4.&hV?Kxz
if (j < size %26amp;%26amp; queue[j] j++; C'S&
if (queue[k]>queue[j]) file://不用交换 DRy,n)U&
break; jT$
SortUtil.swap(queue,j,k); ,+U,(P5>s
k = j; 2)4oe
} ELgq#z
} ~^ ^|]s3
private void fixUp(int k) { Pu`;B
while (k > 1) { 3j}@}2D
int j = k >> 1; 5m\T~[`%
if (queue[j]>queue[k]) +m]Kj3-z@
break; gu|cQ2xV
SortUtil.swap(queue,j,k); Qs #7<NQ
k = j; gBPYGci2F
} Sf"]enwB
} w\`u|f;Aq
< /\y<]b
} ;Svs|]d
}Q#3\z5
} -8pQI
-d8U Hc
SortUtil： 2r*Yd(e
.{-C*
package org.rut.util.algorithm; N^@aO&+A
\ QE?.Fx
import org.rut.util.algorithm.support.BubbleSort; f~-Ipq;F
import org.rut.util.algorithm.support.HeapSort; ]IeyJ
import org.rut.util.algorithm.support.ImprovedMergeSort; VqBb=1r%o7
import org.rut.util.algorithm.support.ImprovedQuickSort; @@~Ql
import org.rut.util.algorithm.support.InsertSort; L>>Cx`ASi
import org.rut.util.algorithm.support.MergeSort; tv\_& ({
import org.rut.util.algorithm.support.QuickSort; KL^hYjC
import org.rut.util.algorithm.support.SelectionSort; '\4 @
import org.rut.util.algorithm.support.ShellSort; 0sGAC
G Z~W#*|V
/** {OGv1\ol&
* @author treeroot k]] e8>
* @since 2006-2-2 Y!*F-v@
* @version 1.0 k:sFI @g
*/ (N/KP+J$n
public class SortUtil { 4O1[D?)`x
public final static int INSERT = 1; qpZR-O
public final static int BUBBLE = 2; DD^iEhG
public final static int SELECTION = 3; /j(3 ~%]o4
public final static int SHELL = 4; ffgb3
public final static int QUICK = 5; #z&@f
public final static int IMPROVED_QUICK = 6; ZMn~QU_5
public final static int MERGE = 7; (sN;B)
public final static int IMPROVED_MERGE = 8; P(Wr[lH\y
public final static int HEAP = 9; x2@W,?oPm
QsC6\Gt#
public static void sort(int[] data) { _7P#?:h
sort(data, IMPROVED_QUICK); rFl6xM;F
} PZE{-TM?W
private static String[] name={ ZT1IN6;8W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,I^:xw_
}; #a|.cm>6
'~;vp
private static Sort[] impl=new Sort[]{ S :%SarhBD
new InsertSort(), *fg|HH+i
new BubbleSort(), MFqM6_
new SelectionSort(), y~-dQ7r
new ShellSort(), Yj#4{2A
new QuickSort(), |a{~Imz{
new ImprovedQuickSort(), gkRbb
new MergeSort(), J%SuiT$L&Y
new ImprovedMergeSort(), qEy]Rc%
new HeapSort() oJ`cefcWo
}; G}ccf%
jc-$l
public static String toString(int algorithm){ 8AQ@?\Rc"2
return name[algorithm-1]; vAH`tPi>
} KDEcR
=*Ru2
public static void sort(int[] data, int algorithm) { ,,o5hD0V9
impl[algorithm-1].sort(data); MbJ|6g99
} ,bnrVa(I
Uh=@8v
public static interface Sort { zM+eb| >cr
public void sort(int[] data); o'auCa,N
} 4 /Q4sE~<
ed:[^#Lj
public static void swap(int[] data, int i, int j) { N&K`bmtD
int temp = data; w$%1j+%&
data = data[j]; Ks_B%d
data[j] = temp; +204.Yj?D
} jt,dr3|/n
} X\ bXat+