[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; RL0,QC)e#@
} GZgu1YR
int i1=l; tVJ}NI #
int i2=mid+1; M_@%*y\o
for(int cur=l;cur<=r;cur++){ !#P|2>>u
if(i1==mid+1) 1"k"<{%
data[cur]=temp[i2++]; |E:q!4?0
else if(i2>r) LlAMtw"
data[cur]=temp[i1++]; Cz@[l=-T7
else if(temp[i1] data[cur]=temp[i1++]; tNf?pV77
else f S-(Kmh
data[cur]=temp[i2++]; >D20f<w(H
} $|~YXH~O
} f?)BAah
?`R;ZT)U-
} LJ7Qwh_",
3D<s#
改进后的归并排序: )Zx;Z[
#P[d?pY
package org.rut.util.algorithm.support; O_@
~"-+BG(5
import org.rut.util.algorithm.SortUtil; > cFH=um
os/_ObPiX
/** yhF{ cK=
* @author treeroot 20glz(
* @since 2006-2-2 ];cJIa
* @version 1.0 6 6S I
*/ )+ }\NCFh
public class ImprovedMergeSort implements SortUtil.Sort { D*!p8J8Ku
<)01]lKH
private static final int THRESHOLD = 10; daamP$h9
#gjhs"$~
/* SymBb}5
* (non-Javadoc) bF'Y.+"dr
* pU4k/v555;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3|1ug92
*/ $#q:\yQsPC
public void sort(int[] data) { .~J}80a/
int[] temp=new int[data.length]; dUAZDoLi
mergeSort(data,temp,0,data.length-1); :oRR1k
} $Pw@EC]
~dkN`1$v
private void mergeSort(int[] data, int[] temp, int l, int r) { %mLQ'$
int i, j, k; bvVEV
int mid = (l + r) / 2; dg#w/}}m
if (l == r) l)@Zuh
return; lP$bxUNt
if ((mid - l) >= THRESHOLD) JBY`Y]V3
mergeSort(data, temp, l, mid); >^mNIfdE^=
else !ho~@sc{W
insertSort(data, l, mid - l + 1); ,+`1/
if ((r - mid) > THRESHOLD) IK#W80y
mergeSort(data, temp, mid + 1, r); "`Y.N$M`k
else )tc"4lp-
insertSort(data, mid + 1, r - mid); >(N0''eM]
khSb|mR)
for (i = l; i <= mid; i++) { 01bBZWX
temp = data; uCX+Lw+As
} Skm$:`u;
for (j = 1; j <= r - mid; j++) { V5$J
temp[r - j + 1] = data[j + mid]; <HReh>)[
} jSLC L'
int a = temp[l]; y*i_Ec\h
int b = temp[r]; Ln~Z_!
for (i = l, j = r, k = l; k <= r; k++) { GTvp)^h
if (a < b) { uL`6}0
data[k] = temp[i++]; >eF4YZ"
a = temp; \1k(4MWd
} else { v]`}T/n
data[k] = temp[j--]; VU~ R
b = temp[j]; r?^[o
} N!O.=>8<
} H"~]|@g-p
} EbTjBq
i:8g3|JfMe
/** XQI.z7F
* @param data lHg&|S&J
* @param l H)#HK!F6f
* @param i 1Q$ePo
*/ TQ-V61<5
private void insertSort(int[] data, int start, int len) { 2?=R_&0Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -Fi{[%&u
} n%N|?!rB
} tCkKJ)m
} Jxyeh1zqB
} w QV4[
wW5:p]<Y
堆排序： Jptzc:~B
B.:DW3
package org.rut.util.algorithm.support; dy>iIc>
RL0#WBR
import org.rut.util.algorithm.SortUtil; G=rgL'{
&c;@u?:@S
/** EN OaC
* @author treeroot ?fO 2&)r
* @since 2006-2-2 2.Kbj^
* @version 1.0 y^M~zOe
*/ ' KX'{Gy
public class HeapSort implements SortUtil.Sort{ k-o(Q"[ '
x2@Q5|a
/* (non-Javadoc) ;4E.Yr*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M$|r8%z1
*/ 1h.Ypzu
public void sort(int[] data) { ho5mH{"OV
MaxHeap h=new MaxHeap(); `R}q&|o7<
h.init(data); 4';~@IBf
for(int i=0;i h.remove(); v };r
System.arraycopy(h.queue,1,data,0,data.length); S4n~wo
} %}t<,ex(yO
-}2'P)Xp
private static class MaxHeap{ ;.%Ii w&WG
1J(` kQ)c
void init(int[] data){ MS`wd
this.queue=new int[data.length+1]; #bFJ6;g=V
for(int i=0;i queue[++size]=data; ~d+.w%Z`
fixUp(size); < 5%:/j
} 43i@5F]
} g>])O
Vl91I+Ev
private int size=0; qu}`;\9@ld
xwSi}.
private int[] queue; + -[M 7J
$UgQ1Qc
public int get() { 2(_+PQ6C=
return queue[1]; b<]--\
} @-uV6X8|
)3W`>7>
public void remove() { XiP xg[;
SortUtil.swap(queue,1,size--); ]h]|PdN
fixDown(1); fSe$w#*I
} -2)6QKh~D
file://fixdown !/1aot^(
private void fixDown(int k) { *'b3Z3c,;
int j; &&(^;+
while ((j = k << 1) <= size) { (A\X+S(
if (j < size %26amp;%26amp; queue[j] j++; 2WKYf0t
if (queue[k]>queue[j]) file://不用交换 0+a-l[!p
break; ]u;Ma G=;
SortUtil.swap(queue,j,k); x1g0_&F
k = j; );8Nj zX1
} 5"x=kp>!d
} 3~Qvp )~
private void fixUp(int k) { ?Cg",k'
while (k > 1) { s~A#B)wB
int j = k >> 1; `WjRb
if (queue[j]>queue[k]) O'<5PwhG
break; x,f=J4yco
SortUtil.swap(queue,j,k); ^/K]id7 2
k = j; p2v+sWO
} c ilo8x`
} %kod31X3<
xJ/<G$LNJ0
} 6P0\t\D0
\0K3TMl)J
} S4r-s;U-v/
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SortUtil： ||M;[-JoJ
}8H_^G8
package org.rut.util.algorithm; pzkl;"gK
>";I3S-t
import org.rut.util.algorithm.support.BubbleSort; o09)esy
import org.rut.util.algorithm.support.HeapSort; ?Ek 3<7d
import org.rut.util.algorithm.support.ImprovedMergeSort; 3Kv~lo^
import org.rut.util.algorithm.support.ImprovedQuickSort; hKZ<PwBi
import org.rut.util.algorithm.support.InsertSort; Bh'_@PHP
import org.rut.util.algorithm.support.MergeSort; !=C74$TH
import org.rut.util.algorithm.support.QuickSort; 3#=%2\
import org.rut.util.algorithm.support.SelectionSort; j. @CB`
import org.rut.util.algorithm.support.ShellSort; f!3$xu5
]Wc:9Zb
/** 1@xmzTC
* @author treeroot byT@O:fL
* @since 2006-2-2 sZ-A~X@g
* @version 1.0 B=4xZJPy
*/ MLu@|Xgh
public class SortUtil { 5Op|="W.
public final static int INSERT = 1; OKXELP
public final static int BUBBLE = 2; mes/gqrJ1I
public final static int SELECTION = 3; PWch9p0U
public final static int SHELL = 4; l ~b
public final static int QUICK = 5; x#_\b-
public final static int IMPROVED_QUICK = 6; ^Po^Co
public final static int MERGE = 7; \Zpg,KOT
public final static int IMPROVED_MERGE = 8; ,*y\b|<j
public final static int HEAP = 9; .(RX;.lw
<)D)j[
public static void sort(int[] data) { s{"}!y=]
sort(data, IMPROVED_QUICK); td}%reH
} LSX;|#AI
private static String[] name={ }^ g6Y3\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #:UP'v=w
}; X&s@S5=r]
dX720/R
private static Sort[] impl=new Sort[]{ y4jJ&
new InsertSort(), RM5$O+"
new BubbleSort(), IB'gY0*
new SelectionSort(), |%V-|\GJ~j
new ShellSort(), g>@T5&1q*
new QuickSort(), O]|T !
new ImprovedQuickSort(), _m;H$N~I#
new MergeSort(), W8@o7svrh
new ImprovedMergeSort(), M%U1?^j8
new HeapSort() +2qCH^80
}; z 1~2w:
VL[}
public static String toString(int algorithm){ n`W7g@Sg#I
return name[algorithm-1]; Rxl )[\A*
} n7CwGN%
lhp.zl
public static void sort(int[] data, int algorithm) { ^]{)gk8P~2
impl[algorithm-1].sort(data); []\=(Uc;
} ?}mbp4+j[
q_J)68BR
public static interface Sort { qHU=X"rn
public void sort(int[] data); {.,-lFb\
} 2@W'q=+0
2. t'!uwI
public static void swap(int[] data, int i, int j) { IP#?$X
int temp = data; u0s25JY.%
data = data[j]; ,MmX(O0
data[j] = temp; D|8Pe{`
} r+yl{
} MBjo9P(