[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; bu _ @>`S
} }MRgNr'k
int i1=l; >6o <Q
int i2=mid+1; 1z6aMd6.
for(int cur=l;cur<=r;cur++){ Z\IM~-
if(i1==mid+1) y 9]d{:9
data[cur]=temp[i2++]; lw9jk`7^
else if(i2>r) LBy`N_@
data[cur]=temp[i1++]; Qjj }k)
else if(temp[i1] data[cur]=temp[i1++]; ES+CAwqf
else pKc!sdC
data[cur]=temp[i2++]; kBR=a%kG
} EE 1D>I
} =IMmtOvJ
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} 3<r7"/5
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改进后的归并排序: `Ow]@flLI
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package org.rut.util.algorithm.support; FLMiW]?x
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import org.rut.util.algorithm.SortUtil; z[c8W@OJ
ta)gOc)r R
/** {zcG%b WJ
* @author treeroot Ep;uz5 ^8
* @since 2006-2-2 `nyz,
* @version 1.0 .4CDQ&B0K
*/ F+H]{ss>
public class ImprovedMergeSort implements SortUtil.Sort { r*`e%`HU
@GKDSS4jv
private static final int THRESHOLD = 10; l7VO8p]y[R
Z?o0Q\}1
/* .z,-ThTH@\
* (non-Javadoc) ElW\;C:K*
* L>14=Pr^(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z2]0brV
*/ MF"*xr v
public void sort(int[] data) { S5hc@^|0Z
int[] temp=new int[data.length]; arm_SyL0
mergeSort(data,temp,0,data.length-1); XS&Pc
} *U1*/Q.
[}4zqY{
private void mergeSort(int[] data, int[] temp, int l, int r) { #g6_)B=S
int i, j, k; H2jypVs$2
int mid = (l + r) / 2; X <xM '
if (l == r) Y5GN7.
return; $Lstq_x+
if ((mid - l) >= THRESHOLD) ejV`W7U
mergeSort(data, temp, l, mid); eQ[akVMk
else lu{ *]!
insertSort(data, l, mid - l + 1); j-1V,V=
if ((r - mid) > THRESHOLD) oYw?kxRZ
mergeSort(data, temp, mid + 1, r); R1LirZlzJ
else y ~ K8
insertSort(data, mid + 1, r - mid); mx}5":}
h~#F2#.
for (i = l; i <= mid; i++) { \ZcI{t'a
temp = data; >k"O3Pc@
} SdlO]y9E
for (j = 1; j <= r - mid; j++) { O<s7VHj
temp[r - j + 1] = data[j + mid]; QwhO/
} |^8ND#x
int a = temp[l]; 55O}SUs!P
int b = temp[r]; VjWJx^ZL#
for (i = l, j = r, k = l; k <= r; k++) { Hi[lN7ma8
if (a < b) { q<E7qY+
data[k] = temp[i++]; c/K#W$ l
a = temp; eW8cI)wU
} else { !b`fykC
data[k] = temp[j--]; tQzbYzGb7
b = temp[j]; [1(eSH
} hD5@PeLh
} \5}PF+)|
} ;b [>{Q;
=r/K#hOR\J
/** 6E) T;R(@
* @param data ^IiA(?8
* @param l w]MI3_|'r(
* @param i ODu/B'*
*/ oX)a6FXK>
private void insertSort(int[] data, int start, int len) { l)$mpMgAD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [Z/P[370
} h's[) t
} AIOGa<^
} @].s^ss9_
} b$Hbo;_
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堆排序： g=D]=&H
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package org.rut.util.algorithm.support; R,D/:k'~k
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import org.rut.util.algorithm.SortUtil; Ut~YvWc9
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/** {@KLN<
* @author treeroot ruagJS)+
* @since 2006-2-2 kVtP~
* @version 1.0 *P *.'XM
*/ :c]y/lQmV
public class HeapSort implements SortUtil.Sort{ g[i;>XyP
3\ajnd|
/* (non-Javadoc) D7pQWlN\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y_*KAr'{P
*/ @GAj%MK$
public void sort(int[] data) { ;L87 %P(.
MaxHeap h=new MaxHeap(); s8(Z&pQ
h.init(data); <6]Hj2
for(int i=0;i h.remove(); \KJTR0EB:>
System.arraycopy(h.queue,1,data,0,data.length); iJ58RY
} 4Ty?>'*|
xy>$^/[$
private static class MaxHeap{ ,eebO~7vB
\|X 1
void init(int[] data){ [x>Pf1
this.queue=new int[data.length+1]; 9hK8dJw
for(int i=0;i queue[++size]=data; Qq{tX
fixUp(size); e#5WX
} j\KOKvY)
} iU.` TqR7
EM<W+YU
private int size=0; u^C\aujg
K'8o'S_bF
private int[] queue; <EyJ $$
d.ywH;
public int get() { @~{TL
return queue[1]; f4<~_ZGr
} 7]u_
,FYA*}[
public void remove() { :Dr4?6hdr
SortUtil.swap(queue,1,size--); CNuE9|W(vI
fixDown(1); gz'{l[
} \l(}8;5}
file://fixdown miBCq l@x
private void fixDown(int k) { G8F;fG N
int j; Nc6y]eGz
while ((j = k << 1) <= size) { *C)m#[#:u
if (j < size %26amp;%26amp; queue[j] j++; or ~@!
if (queue[k]>queue[j]) file://不用交换 7g8\q@',
break; SN[yC
SortUtil.swap(queue,j,k); $hJ 4=F
k = j; .nr%c*JUp
} x?6^EB|@
} !K_<7iExI\
private void fixUp(int k) { \Q`#E'?
while (k > 1) { LCRWC`%&
int j = k >> 1; hBZh0xy
if (queue[j]>queue[k]) GXx'"SK9
break; d?U,}tv
SortUtil.swap(queue,j,k); fX:G;vYn
k = j; .h w(;
} QncjSaEE
} S% ptG$Z
Y,n8co^
} B$=1@
ZWFOC,)b
} 31g1zdT!
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SortUtil： 3Qv9=q|[b
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package org.rut.util.algorithm; ,9:v2=C_
2DZ&g\|
import org.rut.util.algorithm.support.BubbleSort; -K^(L#G
import org.rut.util.algorithm.support.HeapSort; muK)Yw[#N
import org.rut.util.algorithm.support.ImprovedMergeSort; >SZuN"r8`
import org.rut.util.algorithm.support.ImprovedQuickSort; -uAGG?ZER
import org.rut.util.algorithm.support.InsertSort; M+=q"#&
import org.rut.util.algorithm.support.MergeSort; ' z^v}~
import org.rut.util.algorithm.support.QuickSort; cw BiT
import org.rut.util.algorithm.support.SelectionSort; _Axw$oYS
import org.rut.util.algorithm.support.ShellSort; %AgCE"!
5=poe@1g
/** `EP-Qlm
* @author treeroot N:^4OnVR
* @since 2006-2-2 00W_XhJ
* @version 1.0 <1V>0[[e
*/ zS\m8[+]
public class SortUtil { ='/#G0W
public final static int INSERT = 1; }q/[\3
public final static int BUBBLE = 2; 5',b~Pp
public final static int SELECTION = 3; R;/LB^X]
public final static int SHELL = 4; 2zjY|g/
public final static int QUICK = 5; D1fUEHB}A8
public final static int IMPROVED_QUICK = 6; )A;jBfr
public final static int MERGE = 7; o5z&sRZ
public final static int IMPROVED_MERGE = 8; v<} $d.&*
public final static int HEAP = 9; &M\qVL%w
\iwUsv>SB
public static void sort(int[] data) { wzI*QXV2s
sort(data, IMPROVED_QUICK); d D^?%,a
} K8iQ?
private static String[] name={ n u>6UjV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {6*UtG
}; n*=Tm KQ
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private static Sort[] impl=new Sort[]{ j]9,yi
new InsertSort(), y3 S T"U
new BubbleSort(), |R Qa.^.
new SelectionSort(), .w~L0(
new ShellSort(), 1rmN)
new QuickSort(), sMw"C~XL
new ImprovedQuickSort(), p_sqw~)^%
new MergeSort(), .O4=[wE!U
new ImprovedMergeSort(), `O,"mm^@U
new HeapSort() 0c#|LF_
}; w4&-9[@Y
,S3uY6,
public static String toString(int algorithm){ f2$<4Hhmm
return name[algorithm-1]; M<)Vtn
} IC.R4-
6}mSA@4&
public static void sort(int[] data, int algorithm) { u7u1lx>S
impl[algorithm-1].sort(data); L:_pJP
} H,1Iz@W1
A%#."2vq~
public static interface Sort { h3-dJgb
public void sort(int[] data); s[/)v:
} /%^^hr
3DrW[\
public static void swap(int[] data, int i, int j) { O6!:Qd
int temp = data; EO.}{1m=hx
data = data[j]; x8h=3e$
data[j] = temp; FiNB$A
} rOq>jvy
} V_Y2@4