[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; XsG]-Cw
} Cir =(
int i1=l; Ov<3?)ok
int i2=mid+1; xLD6A5n,[
for(int cur=l;cur<=r;cur++){ KOmP-q=6
if(i1==mid+1) W8P**ze4)
data[cur]=temp[i2++]; Gz6GU.IyQy
else if(i2>r) HJ'93,
data[cur]=temp[i1++]; bNaUzM!,H
else if(temp[i1] data[cur]=temp[i1++]; 6szkE{-/?
else ?}]kIK}MC
data[cur]=temp[i2++]; 7O9s5
} f C^l9CRY
} G^(&B30V
(Dar6>!
} NF1D8uI
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改进后的归并排序: y(]|jRo
aW6+Up+G*
package org.rut.util.algorithm.support; {fb~`=?
>=`c [=:Z_
import org.rut.util.algorithm.SortUtil; L|2COX
&Bp\kv
/** p;7 4+q
* @author treeroot (k5DbP[
* @since 2006-2-2 j^ _I{
* @version 1.0 a?Y1G3U'
*/ h/fCCfO,
public class ImprovedMergeSort implements SortUtil.Sort { O7dFz)$
lQsQRp
private static final int THRESHOLD = 10; O9|'8"AF
,SyUr/D
/* >#:/ GN?
* (non-Javadoc) YEQW:r_h.S
* osd^SnL1/5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jccW8g~ ~
*/ bg,}J/
public void sort(int[] data) { )T64(_TE
int[] temp=new int[data.length]; {a3kn\6H0
mergeSort(data,temp,0,data.length-1); 0`!Q-G7
} V{h@nhq
^c\IZ5
private void mergeSort(int[] data, int[] temp, int l, int r) { F3Y>hs):7
int i, j, k; @"I#b99
int mid = (l + r) / 2; BY0|exW
if (l == r) YSV,q@I&1
return; )KqR8UO
if ((mid - l) >= THRESHOLD) X}*o[;2G
mergeSort(data, temp, l, mid); 5|R2cc|"9
else q`aY.dD=O
insertSort(data, l, mid - l + 1); y@M}T{,/
if ((r - mid) > THRESHOLD) 3\KII9
mergeSort(data, temp, mid + 1, r); >-w=7,?'?z
else BJ9sR.yX62
insertSort(data, mid + 1, r - mid); h6h1.lZ
^@Qi&g`lr?
for (i = l; i <= mid; i++) { lk +K+Ra/
temp = data; DVhTb
} 1qC:3 ;P
for (j = 1; j <= r - mid; j++) { %]ayW$4
temp[r - j + 1] = data[j + mid]; ,z1!~gIal
} ,w%oSlOu
int a = temp[l]; z9ShP&^4[
int b = temp[r]; 8sIrG
for (i = l, j = r, k = l; k <= r; k++) { B"PHJj
if (a < b) { y"\,%.
data[k] = temp[i++]; 5(|M["KK~
a = temp; -WUYE
} else { ]VWfdG
data[k] = temp[j--]; }Hz-h4Z
b = temp[j]; QWHy=(!
} ,GX~s5S8
} @E}X-r.^f
} VK'T[5e
A'(7VJ
/** *yaX:,'\$
* @param data .gN$N=7<
* @param l VxN64;|=
* @param i (b%y$D
*/ 8A:^K:Q
private void insertSort(int[] data, int start, int len) { %%~}Lw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4$aO;Z_
} z@~&Kwf\}
} >C3NtGvy
} atf%7}2
} WkaR{{nM
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堆排序： fT3*>^Uv
v'Vt .m&9&
package org.rut.util.algorithm.support; #\;>8
9>Uq$B
import org.rut.util.algorithm.SortUtil; ^ L^F=qx
Ao":9r[V
/** )M'UASB;8
* @author treeroot ~"0@u
* @since 2006-2-2 -2&i)S0R
* @version 1.0 mhk/>+hF
*/ GzFE%< 9F
public class HeapSort implements SortUtil.Sort{ /u)Rppu
lKEX"KQ!
/* (non-Javadoc) ~pevU`}Uqc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^5]uBOv
*/ gKN}Of@^1
public void sort(int[] data) { L"foL
MaxHeap h=new MaxHeap(); C4{\@v}t
h.init(data); ISS\uj63M
for(int i=0;i h.remove(); )_8}53C
System.arraycopy(h.queue,1,data,0,data.length); |=cCv_y
} zBt`L,^
:,kU#eZ$-
private static class MaxHeap{ ,?k%jcR
5#0e={X
void init(int[] data){ Ud#X@xK<h
this.queue=new int[data.length+1]; '_qQrP#
for(int i=0;i queue[++size]=data; rKzlK 'U
fixUp(size); P>Q{He:
} %l}Q?Z
} 0)AM-/"
BF36V\
private int size=0; =4zNo3IvL+
vJRnBq+y
private int[] queue; W7L+8LU;
4TUtY:
public int get() { ~o@\ n
return queue[1]; H#L#2M%
} IyS"
-|}%~0)/bH
public void remove() { 0/\PZX+
SortUtil.swap(queue,1,size--); yW\XNX
fixDown(1); {/d4PI7)tK
} {7?9jEj
file://fixdown 7]|zkjgI
private void fixDown(int k) { l(%k6
int j; hCM8/Vvx6
while ((j = k << 1) <= size) { CE#\Roi x)
if (j < size %26amp;%26amp; queue[j] j++; cJ(BiL-uF
if (queue[k]>queue[j]) file://不用交换 M XZq
break; fxDj+Q1p
SortUtil.swap(queue,j,k); 8xF)_UV
k = j; Wp5]Uk
} P8wy*JvT
} H`m:X,6}
private void fixUp(int k) { oYz!O]j;a
while (k > 1) { tAqA^f*{
int j = k >> 1; ~BZXt7DE
if (queue[j]>queue[k]) 3ai (x1%
break; QCOLC2I
SortUtil.swap(queue,j,k); ja[OcR-tX
k = j; Vkr`17`G
} '{[!j6wt\
} $PSY:Zz
Q.,DZp
} (0i'Nb"
}:`5,b%Y_
} V+lRi"m?|
w[(n>
SortUtil： {-@~Q.&}v
5YiZ-CQ>
package org.rut.util.algorithm; [pii
2sKG(^=Z
import org.rut.util.algorithm.support.BubbleSort; lhqQCV
import org.rut.util.algorithm.support.HeapSort; XRa(sXA3
import org.rut.util.algorithm.support.ImprovedMergeSort; pW\z\o/2
import org.rut.util.algorithm.support.ImprovedQuickSort; 4\M8BRuE
import org.rut.util.algorithm.support.InsertSort; *URdd,){i
import org.rut.util.algorithm.support.MergeSort; sVu k
import org.rut.util.algorithm.support.QuickSort; .H8mRvd?
import org.rut.util.algorithm.support.SelectionSort; %}C9
import org.rut.util.algorithm.support.ShellSort; |q;Al z{
rA,CQypo
/** Xv0F:1
* @author treeroot D?e"U_
* @since 2006-2-2 \a\= gn
* @version 1.0 :pwa{P
*/ |;P^clS3
public class SortUtil { 8xgJSk
public final static int INSERT = 1; T2wv0sHlt
public final static int BUBBLE = 2; u4YM^* S.
public final static int SELECTION = 3; &Yp+k}XU
public final static int SHELL = 4; Xo Y7/&&
public final static int QUICK = 5; Z_FNIM0f
public final static int IMPROVED_QUICK = 6; d.`&0
public final static int MERGE = 7; HsnG4OE
public final static int IMPROVED_MERGE = 8; \c{R <Hh
public final static int HEAP = 9; uPkb, :6~Z
Gn59yG!4
public static void sort(int[] data) { }W$8M>l
sort(data, IMPROVED_QUICK); f=o4I2Y[
} b^ sb]bZW
private static String[] name={ zmI5"K"'F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "u;YI=+
}; vM`7s[oAK
JSgpb?(
private static Sort[] impl=new Sort[]{ =}v ;1m
new InsertSort(), h*s`^W3
new BubbleSort(), :uo[&&c
new SelectionSort(), EKuSnlTXba
new ShellSort(), IIxJqGN:
new QuickSort(), e_/x&a(i8
new ImprovedQuickSort(), ]>D)#
new MergeSort(), <F7V=Er
new ImprovedMergeSort(), R:/ha(+
new HeapSort() WmNYO,>
}; t?{B_Bf
-`7$Qu2
public static String toString(int algorithm){ !\;:36B#6
return name[algorithm-1]; T C8`JU=wV
} R\5Vq$Q
"Sjr_!u
public static void sort(int[] data, int algorithm) { Jx$iwu
impl[algorithm-1].sort(data); .x}gg\
} ;,XyN+2H
;/'|WLI9
public static interface Sort { =Vb~s+YW
public void sort(int[] data); FXahZW~Ol
} bLbR IY"l
s<vs:jna
public static void swap(int[] data, int i, int j) { t`5j4bdG
int temp = data; vXdZmYrC
data = data[j]; X|b2c+I
data[j] = temp; Oz{%k#X-
} Qz+sT6js-
} jl}$HEI5m}