[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; FGZOn5U6'
} 2]7nw1&
int i1=l; ?O_;{(F_
int i2=mid+1; Jlzhn#5c-
for(int cur=l;cur<=r;cur++){ }/=VnCfU
if(i1==mid+1) l-mUc1.S
data[cur]=temp[i2++]; q3;HfZ
else if(i2>r) V7&L+]!
data[cur]=temp[i1++]; G~_dSa@g G
else if(temp[i1] data[cur]=temp[i1++]; JsH9IK:
else JeO(sj$e
data[cur]=temp[i2++]; ]@'YlPU
} ak'RV*>mT
} ThHK1{87X}
M]&9Kg3
} q H+~rj
xD~:= ]G
改进后的归并排序: EZ$m4:{e
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package org.rut.util.algorithm.support; `'g%z: ~
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import org.rut.util.algorithm.SortUtil; 1|zo-'y
G6I>Ry[2?
/** SnVnC09y
* @author treeroot V8c&2rNa
* @since 2006-2-2 LTi0,03l<
* @version 1.0 X&K1>dgWP
*/ $FD0MrB_+
public class ImprovedMergeSort implements SortUtil.Sort { N[AX29
!#>{..}}3
private static final int THRESHOLD = 10; _xbVAI4
3D\I#g
/* 2cww7z/B
* (non-Javadoc) nzU@}/A/
* ATwPfo8jx@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KF-n_:Bd+
*/ E")82I
public void sort(int[] data) { |n~-LH++
int[] temp=new int[data.length]; pN?
mergeSort(data,temp,0,data.length-1); VG)kPKoi
} .aNy)Yu8
lwa
private void mergeSort(int[] data, int[] temp, int l, int r) { ]/U)<{6
int i, j, k; :V8 \^
int mid = (l + r) / 2; Ix}:!L
if (l == r) Jz3u r)|
return; ab6KK$s
if ((mid - l) >= THRESHOLD) r=u>TA$
mergeSort(data, temp, l, mid); OJ&~uV>2
else ]mYY1%H8M
insertSort(data, l, mid - l + 1); 'H97D-86/
if ((r - mid) > THRESHOLD) >d_O0a*W-
mergeSort(data, temp, mid + 1, r); aQcJjF5x
else oKzLt
insertSort(data, mid + 1, r - mid); @q|I$'K]x
p*vEVo
for (i = l; i <= mid; i++) { b]@^SN9
temp = data; INi(G-!g
} /-1[}h%U'
for (j = 1; j <= r - mid; j++) { rIy,gZr.U
temp[r - j + 1] = data[j + mid]; ^xFZ;Yf
} 8nNRn[oS
int a = temp[l]; W*N^Gp@
int b = temp[r]; =`u4xa#m
for (i = l, j = r, k = l; k <= r; k++) { FL-sXg
if (a < b) { ,|}Pof=]xk
data[k] = temp[i++]; &_G^=Nc,H
a = temp; 81`-xVd
} else { ;jS~0R
data[k] = temp[j--]; A[^fG_l4
b = temp[j]; ?9.SwIxU&
} KxqJlben
} 8eQ 4[wJY
} jo/-'Lf{?
um,Zt
/** e0qU2
* @param data D&$%JT'3
* @param l $fL2w^ @
* @param i fn]f$n*`
*/ ``DS?pUY
private void insertSort(int[] data, int start, int len) { 8Y_wS&eB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HvLvSy1U
} Xb.WI\Eh
} w7s+6,
} xmsw'\
} hv2@}<r?
[ lW~v:W
堆排序： $QN}2lJ>
#[ipJ %
package org.rut.util.algorithm.support; { LZ` _1D
Dz3=ksXZ
import org.rut.util.algorithm.SortUtil; @WEDXB
Y?ouB
/** ?%d]iTZE
* @author treeroot J{`G=
* @since 2006-2-2 ?@!dc6
* @version 1.0 ]Vuq)#
*/ K`Vi5hR~c
public class HeapSort implements SortUtil.Sort{ x(ue |UG
/J9|.];%r
/* (non-Javadoc) unY+/p $
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /-4rcC
*/ W!MO}0s
public void sort(int[] data) { %L,mj
MaxHeap h=new MaxHeap(); L/t'|<m
h.init(data); iK%%
for(int i=0;i h.remove(); lpi^<LQ@l
System.arraycopy(h.queue,1,data,0,data.length); jv_z%`
} Rf9;jwU
m:_'r"o
private static class MaxHeap{ K*NCIIDh
s"gNHp.oF
void init(int[] data){ mW-4
this.queue=new int[data.length+1]; AXFQd@#
for(int i=0;i queue[++size]=data; ^~XsHmcQ
fixUp(size); cdY|z]B
} >PHin%#
} z3>ldT
V $Y=JK@
private int size=0; XA PqRJ*Z
rY yB"|
private int[] queue; Vz[tgb]-
X+dLk(jI`u
public int get() { 1g<jr.
return queue[1]; -!4Mmp"2@u
} 1<766
h0ml#A`h
public void remove() { U|yXJ.Z3
SortUtil.swap(queue,1,size--); vM5yiHI(jb
fixDown(1); KFZ2%:6>
} QmxI;l
file://fixdown ->_rSjnM{
private void fixDown(int k) { *ETSx{)8
int j; ))ArM-02
while ((j = k << 1) <= size) { ]l/ PyX
if (j < size %26amp;%26amp; queue[j] j++; ^E-BB 6D
if (queue[k]>queue[j]) file://不用交换 7\.{O$Q
break; x)GpNkx:
SortUtil.swap(queue,j,k); xw2dNJL
k = j; /h6K"w=='!
} U4s)3jDw
} cCa+UTxaJ
private void fixUp(int k) { }3HN$Fwo
while (k > 1) { Wl?0|{W
int j = k >> 1; T%q@jv{c
if (queue[j]>queue[k]) {/ef`MxV }
break; Y-YlQ^
SortUtil.swap(queue,j,k); ,v\^efc:%
k = j; |f67aN
} x#)CH}J
} m!#'4
skeH~-`M@
} 1/\JJ\
}%)]b*3
} V$o]}|
k7ye,_&>
SortUtil： dBRK6hFC
Bl$Hg,in-
package org.rut.util.algorithm; "($"T v2
-HQ(t
import org.rut.util.algorithm.support.BubbleSort; hlKM4JT\
import org.rut.util.algorithm.support.HeapSort; @{V bu
import org.rut.util.algorithm.support.ImprovedMergeSort; $@utlIXA'
import org.rut.util.algorithm.support.ImprovedQuickSort; @y1:=["b
import org.rut.util.algorithm.support.InsertSort; tXXnHEz
import org.rut.util.algorithm.support.MergeSort; ]Y;5U
import org.rut.util.algorithm.support.QuickSort; *TyLB&<t
import org.rut.util.algorithm.support.SelectionSort; ! mb<z^>5
import org.rut.util.algorithm.support.ShellSort; ^jYE4gHM
Q h~
/** ks19e>'5Q
* @author treeroot (pv6V2i
* @since 2006-2-2 }z,f8Yz
* @version 1.0 ,azBk`$iQr
*/ ;X;q8J^_K_
public class SortUtil { {J~VB~('
public final static int INSERT = 1; OrPi ("/
public final static int BUBBLE = 2; BWF>;*Xro
public final static int SELECTION = 3; jCp^CNbA
public final static int SHELL = 4; 2QIx~Er
public final static int QUICK = 5; y?P4EVknM3
public final static int IMPROVED_QUICK = 6; >S}^0vNZX
public final static int MERGE = 7; hEhvA6f,
public final static int IMPROVED_MERGE = 8; <rI8O;\H
public final static int HEAP = 9; i K,^|Q8
*N65B#
public static void sort(int[] data) { r7FFZNs!
sort(data, IMPROVED_QUICK); \DMZ M
} c9O0YQ3&8
private static String[] name={ nq%GLUH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .dPy<6E
}; XlJA}^e
Um%$TGw5
private static Sort[] impl=new Sort[]{ 1c4@qQyo
new InsertSort(), JRr'81\
new BubbleSort(), h?7@]&VJ
new SelectionSort(), b}HwvS:
new ShellSort(), CaB@,L
new QuickSort(), 4{6XZ_J1
new ImprovedQuickSort(), wX+KW0|>
new MergeSort(), jJqq:.XqB8
new ImprovedMergeSort(), )0XJOm
new HeapSort() eKvQS}11
}; @:w[(K[^b/
Qv B%X)J
public static String toString(int algorithm){ Lq#$q>!K
return name[algorithm-1]; )(V!& w6
} \AY*x=PF
#-7w|
public static void sort(int[] data, int algorithm) { UPcx xtC
impl[algorithm-1].sort(data); {?uG] G7
} x5(B(V@b
w%?6s3
public static interface Sort { ]I:h4hgw
public void sort(int[] data); 0eFvcH:qG
} I><sK-3
Qm@v}pD
public static void swap(int[] data, int i, int j) { \1nj=ca?
int temp = data; d)1Pl3+
data = data[j]; jrN"en
data[j] = temp; B&Iy_;
} k)TNmpL%"
} ,M0#?j>