[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; c" +zgP
} #]y5zi
int i1=l; O#:&*Mv
int i2=mid+1; =JW[pRI5a
for(int cur=l;cur<=r;cur++){ AWT"Y4Ie
if(i1==mid+1) f`?0WJ(M
data[cur]=temp[i2++]; #uKWuGz]
else if(i2>r) B6MkF"J<
data[cur]=temp[i1++]; 3$_*N(e
else if(temp[i1] data[cur]=temp[i1++]; 7}%H2$Do
else HxIoA
data[cur]=temp[i2++]; P6YQK+
} B?3juyB`--
} hVM2/j
r|fO7PD
} 5)`h0TK
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改进后的归并排序: ,9\Snn
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package org.rut.util.algorithm.support; 8teJ*sz
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import org.rut.util.algorithm.SortUtil; DW|vMpU]u
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/** gu<V(M\
* @author treeroot >v5k{Cbp0
* @since 2006-2-2 yubSj*
* @version 1.0 BN_7Ay/k
*/ FH5ql~
public class ImprovedMergeSort implements SortUtil.Sort { .m4;^S2cO
[w\?j,
private static final int THRESHOLD = 10; f|7u_f
T=Z.U$
/* M^madx6`
* (non-Javadoc) _GtBP'iN
* >H|` y@]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e(B9liXM
*/ ug&[ IL~lc
public void sort(int[] data) { CC >=UF
int[] temp=new int[data.length]; Vy)hDa[&
mergeSort(data,temp,0,data.length-1); !sSQQo2Sv
} N+W&NlZ
UHO_Z
private void mergeSort(int[] data, int[] temp, int l, int r) { PH4%R]{8{
int i, j, k; Wa"(m*hW
int mid = (l + r) / 2; ;GHvPQc_
if (l == r) "E=j|q
return; Pt< s* (
if ((mid - l) >= THRESHOLD) JcO08n
mergeSort(data, temp, l, mid); B/uniR^x
else wFn[9_`*
insertSort(data, l, mid - l + 1); l95<QI
if ((r - mid) > THRESHOLD) Z0,~V
mergeSort(data, temp, mid + 1, r); d.<~&.-$
else k)(Biz398E
insertSort(data, mid + 1, r - mid); Y;J*4k]
_O:WG&a6
for (i = l; i <= mid; i++) { F1azZ(
temp = data; WgR4Ix^L#
} *<V^2z$y_
for (j = 1; j <= r - mid; j++) { 3yS
temp[r - j + 1] = data[j + mid]; ni CE\B~
} =v6*|
int a = temp[l]; 5"Kx9n|
int b = temp[r]; b B
for (i = l, j = r, k = l; k <= r; k++) { p#8W#t$
if (a < b) { 3NK ^AaTK
data[k] = temp[i++]; q`|CrOzO
a = temp; < a rZbM
} else { |PVt}*0"
data[k] = temp[j--]; M@UVpQwgv
b = temp[j]; l0]d
} ;."<m
} WT3gNNx|
} ),^eA
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/** PFSLyV*
* @param data W=}Okq)x9I
* @param l &R-H"kK?
* @param i h5%|meZQb
*/ .5HQ
private void insertSort(int[] data, int start, int len) { <!^ [~`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cSP*f0n,eo
} y7u^zH6wj
} >R^@Ww;|q
} MLVB^<qkeH
} YrI|gz)
R""%F#4XJ2
堆排序： %uESrc-;
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package org.rut.util.algorithm.support; ;]D(33)(
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import org.rut.util.algorithm.SortUtil; P1kB>"bR
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/** =odkz}bU
* @author treeroot KlxN~/gyik
* @since 2006-2-2 "`tXA
* @version 1.0 PK6iY7Qp)
*/ #} ,x @]p
public class HeapSort implements SortUtil.Sort{ =J'P.
Qu*1g(el!o
/* (non-Javadoc) _cI_#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FY0%XW
*/ $r.U
public void sort(int[] data) { n[+'OU[
MaxHeap h=new MaxHeap(); $ACx*e%
h.init(data); "l~Ci7& !a
for(int i=0;i h.remove(); |cbd6e{!
System.arraycopy(h.queue,1,data,0,data.length); ,32xcj}j)r
} f|3q^wjs
('k<XOi
private static class MaxHeap{ 5fjd{Y[k
8^ep/b&|
void init(int[] data){ lvSdY(8
this.queue=new int[data.length+1]; *MM#Z?mP
for(int i=0;i queue[++size]=data; >=,uau7
fixUp(size); F#r#}.B='U
} T.&7sbE_
} XJ\hd,R
3fS}:!sQ
private int size=0; mX# "+X|
6Z:YT&,f
private int[] queue; C0)Z6
C*~aSl7
public int get() { HD`>-E#
return queue[1]; F3E[wdT
} AHh#Fx+K
a' FN 3
public void remove() { TRvZ
SortUtil.swap(queue,1,size--); cgZaPw2 bw
fixDown(1); D@54QJ<
} J\co1kO9/
file://fixdown n@>wwp
private void fixDown(int k) { ]?l{j
int j; O12Q8Oj!0
while ((j = k << 1) <= size) { @"87F{!
if (j < size %26amp;%26amp; queue[j] j++; *YV S|6bs
if (queue[k]>queue[j]) file://不用交换 fv'4f$U
break; 85Y|CN] vQ
SortUtil.swap(queue,j,k); 0&w0aP`Y
k = j; }p3b#fAr
} rzLd"`
} gSi5u#}J
private void fixUp(int k) { HMQI&Lh=U
while (k > 1) { ZW4aY}~)$
int j = k >> 1; mf$j03tu
if (queue[j]>queue[k]) YcM;S
break; +&v\ /
SortUtil.swap(queue,j,k); U@lV
k = j; yyl#{Nl@t
} QJX/7RA
} Cnh|D^{s
,Qc.;4s-
} 7XAvd-
IM(u<c$
} e<+<lj"
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SortUtil： UZxmhsv
[~%`N*G
package org.rut.util.algorithm; &w\I<J`T
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import org.rut.util.algorithm.support.BubbleSort; :hqZPajE
import org.rut.util.algorithm.support.HeapSort; V0i9DK|!
import org.rut.util.algorithm.support.ImprovedMergeSort; G?)vWM`j
import org.rut.util.algorithm.support.ImprovedQuickSort; .Ao0;:;(2-
import org.rut.util.algorithm.support.InsertSort; K b(9)Re
import org.rut.util.algorithm.support.MergeSort; ';YgG<u
import org.rut.util.algorithm.support.QuickSort; D'i6",Z>
import org.rut.util.algorithm.support.SelectionSort; !$xu(D.
import org.rut.util.algorithm.support.ShellSort; R{}qK r
:=.*I
/** !k&)EWP?
* @author treeroot ~l4f{uOD>]
* @since 2006-2-2 F8mC?fbK9
* @version 1.0 Yv\!vW7I
*/ g`Md80*Zfk
public class SortUtil { 00<{:
public final static int INSERT = 1; >M4"|W U_
public final static int BUBBLE = 2; =4NqjSH
public final static int SELECTION = 3; L]bVN)JU
public final static int SHELL = 4; <0j{ $.
public final static int QUICK = 5; Ol+Kp!ocY
public final static int IMPROVED_QUICK = 6; pM$ @m]
public final static int MERGE = 7; @p!Q1-]=
public final static int IMPROVED_MERGE = 8; /^<en(0=P
public final static int HEAP = 9; !D:k!
F@SG((`
public static void sort(int[] data) { vOT*iax0
sort(data, IMPROVED_QUICK); JeQ[qQ
} s-D?)
private static String[] name={ ([pSVOnIz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $G";2(-k
}; gA:TL{X0
bx;f`8SN
private static Sort[] impl=new Sort[]{ qu{mqkfN>
new InsertSort(), J_"3UZ~&
new BubbleSort(), 3wt
new SelectionSort(), qo;)X0N
new ShellSort(), ~[18q+,
new QuickSort(), IC~ljy]y_
new ImprovedQuickSort(), &YX6"S_B
new MergeSort(), zixEMi[8
new ImprovedMergeSort(), L#j/0IHD
new HeapSort() $h[Yzl
}; j$PI,`
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public static String toString(int algorithm){ x:-`o_Q*i
return name[algorithm-1]; (V9h2g&8L
} ixI:@#5wY
/$`;r2LG
public static void sort(int[] data, int algorithm) { h}6_ybmZ
impl[algorithm-1].sort(data); tgN92Q.i6T
} #5{sglC"|F
j%xBo:
public static interface Sort { Bw-s6MS
public void sort(int[] data); sR79 K1*j
} 6VR[)T%
u4"r>e6_B
public static void swap(int[] data, int i, int j) { ~ x`7)3
int temp = data; vInFo.e[4
data = data[j]; l9Pu&M?5
data[j] = temp; $9H[3OZPVv
} jT^!J+?6K+
} 0xP:9rm