[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; 8<QdMkI
} ;@oN s-
int i1=l; &OH={Au
int i2=mid+1; Li4zTR|U
for(int cur=l;cur<=r;cur++){ K &N
if(i1==mid+1) {'NvG
data[cur]=temp[i2++]; cQ R]le%(
else if(i2>r) k5'Vy8q
data[cur]=temp[i1++]; s;ls qQk
else if(temp[i1] data[cur]=temp[i1++]; vg32y /l]S
else b gK}-EU
data[cur]=temp[i2++]; Po^?QVJ7
} zBzZxK>$
} u. F9g #
VY7[)
} zHM(!\8K
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改进后的归并排序: UM"- nZ>[
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package org.rut.util.algorithm.support; inMA:x}cF1
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import org.rut.util.algorithm.SortUtil; -(;26\lE
n{argI8wF
/** -&zZtDd F
* @author treeroot rlOAo`hd
* @since 2006-2-2 Rl?_^dPx
* @version 1.0 ia!y!_L\'
*/ g}1B;zGf
public class ImprovedMergeSort implements SortUtil.Sort { V17%=bCZ5[
iP ->S\
private static final int THRESHOLD = 10; LTQ"8
&]|?o_p3W
/* iu=7O
* (non-Javadoc) :(P9mt
* 8e1UmM[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3YOq2pW72G
*/ "*e$aTZB\
public void sort(int[] data) { qN9(S:_Px
int[] temp=new int[data.length]; -=)H{
mergeSort(data,temp,0,data.length-1); }C"%p8=HM
} NJWA3zz
u}macKJmp\
private void mergeSort(int[] data, int[] temp, int l, int r) { Z>k#n'm^z
int i, j, k; yEqps3%
int mid = (l + r) / 2; *av<E
if (l == r) E Nhl&J
return; "jKY1*?
if ((mid - l) >= THRESHOLD) <lPm1/8
mergeSort(data, temp, l, mid); y.mda:$~=
else spH7 /5}
insertSort(data, l, mid - l + 1); FrGgga$
if ((r - mid) > THRESHOLD) 6*78cg Io
mergeSort(data, temp, mid + 1, r); FXG]LoP
else "c%0P"u
insertSort(data, mid + 1, r - mid); =(j1rW!
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for (i = l; i <= mid; i++) { _)3|f<E_t)
temp = data; un mJbY;t
} Q4#m\KK;i9
for (j = 1; j <= r - mid; j++) { \kL3.W_
temp[r - j + 1] = data[j + mid]; -P$PAg5"2
} 'uSn}hm
int a = temp[l]; )l C)@H}
int b = temp[r]; O`IQ(,yef
for (i = l, j = r, k = l; k <= r; k++) { 'T*&'RQr
if (a < b) { dVtG/0
data[k] = temp[i++]; pZ.ecZe/
a = temp; qd ~BnR$=
} else { ;#W2|'HD
data[k] = temp[j--]; 5}l[>lF
b = temp[j]; u5`u>.!
} Q%`@0#"]Sv
} t6"%3#s
} r= `Jn6@
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/** |.: q
* @param data ^eY!U%.
* @param l v!~fs)cdE|
* @param i MS~(D.@ZS
*/ !GjQPAW
private void insertSort(int[] data, int start, int len) { 'x#~'v*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f643#1
} {I%cxQ#y
} ?=Z?6fw
} UmP/h@8
} oq Xg
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堆排序： nfbR P t
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package org.rut.util.algorithm.support; #jvtUS\
hR?{3d#x2
import org.rut.util.algorithm.SortUtil; Mq156TL
hn GZ=
/** e'NJnPO
* @author treeroot 2`K=Hby
* @since 2006-2-2 gh]cXuph
* @version 1.0 ZPLm]I\]
*/ AofKw
public class HeapSort implements SortUtil.Sort{ hED}h![
g wRZ%.Cn
/* (non-Javadoc) `r6,+&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UcHJR"M~c
*/ Rsm^Z!sn
public void sort(int[] data) { yS'I[l
MaxHeap h=new MaxHeap(); -$ls(oot
h.init(data); 4SxX3Fw
for(int i=0;i h.remove(); q"lSZ; 'E
System.arraycopy(h.queue,1,data,0,data.length); -=Q*Ml#I
} +5*95-;0
>1Ibc=}g
private static class MaxHeap{ )D7m,Wi+
D%pF;XY
void init(int[] data){ `4J$Et%S
this.queue=new int[data.length+1]; D;*SnU(9L
for(int i=0;i queue[++size]=data; iOghb*aW
fixUp(size); Rr]Hy^w
} tXs\R(?T
} k1~&x$G
cOJo3p;&
private int size=0; jvL[ JI,b
NH4#
private int[] queue; IHac:=*Q
rglXs
public int get() { gPI ?C76
return queue[1]; K($Npuu]
} (y~TL*B
r#p9x[f<Y
public void remove() { +~$ ]}%
SortUtil.swap(queue,1,size--); EW OVx*l
fixDown(1); sY&IquK^
} j</: WRA`]
file://fixdown .*Y
private void fixDown(int k) { *i%.;Z"
int j; =8. ,43+
while ((j = k << 1) <= size) { X&`t{Id?6
if (j < size %26amp;%26amp; queue[j] j++; E{`fF8]K
if (queue[k]>queue[j]) file://不用交换 45c$nuZ
break; *]) `z8Ox
SortUtil.swap(queue,j,k); ]h+j)J}[A
k = j; qR8Lh( "i
} FcU SE
} uw_Y\F-$
private void fixUp(int k) { hL{KRRf>
while (k > 1) { 8OU\V5i[,q
int j = k >> 1; 7`'Tbp
if (queue[j]>queue[k]) "<1{9
break; /(*q}R3Kfo
SortUtil.swap(queue,j,k); !l8PDjAE
k = j; :crW9+
} 0'C1YvF
} dR,fXQm
l'_r:b
} $%#!bV
q>+k@>bk@
} JPw.8|V)y
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SortUtil： Kw ]=
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package org.rut.util.algorithm; Wh*uaad7
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import org.rut.util.algorithm.support.BubbleSort; d\8l`Krs[_
import org.rut.util.algorithm.support.HeapSort; !pX>!&sb
import org.rut.util.algorithm.support.ImprovedMergeSort; x'<X!gw
import org.rut.util.algorithm.support.ImprovedQuickSort; U'bEL^Jf
import org.rut.util.algorithm.support.InsertSort; "+G8d'%YV
import org.rut.util.algorithm.support.MergeSort; rg!r[1c
import org.rut.util.algorithm.support.QuickSort; 0M[EEw3
import org.rut.util.algorithm.support.SelectionSort; 8<Av@9 *}
import org.rut.util.algorithm.support.ShellSort; )Ql%r?(F+
jQB9j
/** E:nF$#<'N
* @author treeroot 64tvP^kp
* @since 2006-2-2 M .mfw#*
* @version 1.0 t'ql[
*/ eeB{c.#
public class SortUtil { N`e[:[
public final static int INSERT = 1; XXa|BZ1RX
public final static int BUBBLE = 2; u'BaKWPS
public final static int SELECTION = 3; 4|?;TE5
public final static int SHELL = 4; 1=V-V<
public final static int QUICK = 5; `[ir}+S
public final static int IMPROVED_QUICK = 6; CLRdm^B
public final static int MERGE = 7; SwMc pNo
public final static int IMPROVED_MERGE = 8; XwaXdvmK
public final static int HEAP = 9; q(84+{>B
fE mr^R
public static void sort(int[] data) { $>LQ6|XRu
sort(data, IMPROVED_QUICK); ( a#BV}=
} v.qrz"98-
private static String[] name={ &tj!*k'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P&LsVR{#
}; DB,J3bm
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private static Sort[] impl=new Sort[]{ PdWx|y{%
new InsertSort(), 5=ryDrx
new BubbleSort(), 6=Otq=WH
new SelectionSort(), _oeS Uzq.
new ShellSort(), oUlVI*~ND
new QuickSort(), ujpJ@OWj
new ImprovedQuickSort(), Cw&KVw*
new MergeSort(), H qx-;F~0
new ImprovedMergeSort(), xJ.M;SF4
new HeapSort() nBYZ}L q
}; 0</);g}
w``U=sfmV
public static String toString(int algorithm){ >^3i|PB
return name[algorithm-1]; Qo|\-y-#
} PCtzl)
k!Y, 63V=
public static void sort(int[] data, int algorithm) { 7@W>E;go
impl[algorithm-1].sort(data); H<+TR6k<
} Xsa].
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public static interface Sort { & 1f+,
public void sort(int[] data); CU!Dhm/U
} |vj/Wwr
2D5StCF$O
public static void swap(int[] data, int i, int j) { #Gi$DMW
int temp = data; pMM8-R'W-
data = data[j]; KMax$
data[j] = temp; 7b+6%fV
} hM!a_'
} 5|)W.*Q