[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; cMfnc.P\K
} 3ZAzv en
int i1=l; `)H| &!wT
int i2=mid+1; o6X<FE#8
for(int cur=l;cur<=r;cur++){ oTeQY[%$
if(i1==mid+1) WhL"-f
data[cur]=temp[i2++]; jYh.$g<`0+
else if(i2>r) +H_ /
data[cur]=temp[i1++]; .Zx7+`i
else if(temp[i1] data[cur]=temp[i1++]; !)OA7%3m
else i,/Q.XL
data[cur]=temp[i2++]; %%Wn:c>
} 1k)`C<l
} VjSA&R
s3)T}52
} >kV=h?]Y
HmpV; <t3
改进后的归并排序: (Jy >,~O
*%dWNvN4X
package org.rut.util.algorithm.support; }& 01=nY
n(\VP!u5r
import org.rut.util.algorithm.SortUtil; )<L?3Jjt5
"oCXG`.k&
/** B)ibxM(n*
* @author treeroot %U$%x
* @since 2006-2-2 (PnrY~9
* @version 1.0 IUy5=Sl
*/ h='@Q_1Sb
public class ImprovedMergeSort implements SortUtil.Sort { iu'rc/=V
3]/Y=A
private static final int THRESHOLD = 10; `{\10j*B
i'0ol^~y6
/* j"<F?k@`Q
* (non-Javadoc) [u8JqX
* V[">SiOg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LMYO>]dg
*/ -GL-&^3IjH
public void sort(int[] data) { f>+:UGmP
int[] temp=new int[data.length]; n4EZy<~m
mergeSort(data,temp,0,data.length-1); zj'uKBDl
} ;Z#DB$o\
D^2yP~(
private void mergeSort(int[] data, int[] temp, int l, int r) { +|Qe/8Q
int i, j, k; G6j9,#2@
int mid = (l + r) / 2; $!"*h
if (l == r) p:qj.ukw
return; ^ `Y1
if ((mid - l) >= THRESHOLD) 9Dx9alJR
mergeSort(data, temp, l, mid); q*{Dy1Tj
else aEqDxr6
insertSort(data, l, mid - l + 1); -cWxS{vO
if ((r - mid) > THRESHOLD) JOH=)+xj
mergeSort(data, temp, mid + 1, r); LwIX&\Ub
else e@L7p,
insertSort(data, mid + 1, r - mid); +DP{_x)t
Z+x`q#ZQr
for (i = l; i <= mid; i++) { .Ue1}'v*,
temp = data; J+8T Ie
} GwZ(3
for (j = 1; j <= r - mid; j++) { btU:=6
temp[r - j + 1] = data[j + mid]; @c{b\is2
} o*|j}hnbv
int a = temp[l]; U*Pi%J
int b = temp[r]; r1X\$&
for (i = l, j = r, k = l; k <= r; k++) { }Z\PE0
if (a < b) { =Qw`F0t
data[k] = temp[i++]; ZIM 5$JdCv
a = temp; ?!kPW^gD
} else { ]+i~Cbj
data[k] = temp[j--]; i^DZK&B@u
b = temp[j]; {KalVZX2R
} eI*o9k$Qs
} W%cJ#R[o
} g"L$}#iTsl
k M' :.QT
/** E:ocx2dp
* @param data = eDi8A*~
* @param l ]Syr{|
* @param i AIFI@#3
*/ /0qLMlL$
private void insertSort(int[] data, int start, int len) { B@2VI 1%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >~k"C,6
} YV>]c9!q
} V3$Yr"rZ;
} IPT\d^|f
} cp>1b8l6?
/__@a&9t
堆排序： o Kfm=TbY
[Dq!t1
package org.rut.util.algorithm.support; k),.
J-g<-!>RM
import org.rut.util.algorithm.SortUtil; myeez+@ m
Th)Z?\8zk
/** 7B,axkr
* @author treeroot &udlt//^%
* @since 2006-2-2 * "Z5bKL
* @version 1.0 [<M~6]
*/ Q)s[ls
public class HeapSort implements SortUtil.Sort{ _]whHS+
6vQCghI
/* (non-Javadoc) !nkjp[p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3@/\j^U
*/ h+7THMI
public void sort(int[] data) { kKqb:
MaxHeap h=new MaxHeap(); zn'F9rWx>
h.init(data); F"<TV&xf
for(int i=0;i h.remove(); &{c.JDO
System.arraycopy(h.queue,1,data,0,data.length); hf~'EdU
} i#Y[I"'
89[5a
private static class MaxHeap{ ub/9T-#l
= j,Hxq
void init(int[] data){ Y[ciT)
this.queue=new int[data.length+1]; TxD,A0
for(int i=0;i queue[++size]=data; 54%@q[-
fixUp(size); lU[" ZFP
} cn$o$:tW
} RHc-kggk!
V94eUmx>?+
private int size=0; ZCAdCKX|
kgV_*0^
private int[] queue; eJJD'Z
rv\m0*\<
public int get() { N1 }#6YNw
return queue[1]; ;5bzXW#U
} $&Ntdn
fvDt_g9oI
public void remove() { pp#xN/V#a
SortUtil.swap(queue,1,size--); ~<?+(V^D
fixDown(1); ,33[/j
} n5~7x
file://fixdown N%k6*FBp~
private void fixDown(int k) { M(alc9tn
int j; 1sqBBd"=PY
while ((j = k << 1) <= size) { j[Y$)HF
if (j < size %26amp;%26amp; queue[j] j++; kIlc$:K^
if (queue[k]>queue[j]) file://不用交换 1@)kNg)*$
break; ' R!pc
SortUtil.swap(queue,j,k); Wz~=JvRHh
k = j; s?8vs%(l
} .I"Qu:``
} +EZ Lic
private void fixUp(int k) { SCCBTpmf2B
while (k > 1) { a9ko3L
int j = k >> 1; Pde|$!Jo
if (queue[j]>queue[k]) 2L<iIBSJwm
break; Be=J*D!E=>
SortUtil.swap(queue,j,k); H<|ilL'fX
k = j; kf8-#Q/B
} GxL;@%B
} R;wq
*oC],4y~D
} xV_,R'l
f.%mp$~T
} .>Gnb2
%MQU&H9[
SortUtil： &o$z[b
gkJL=,
package org.rut.util.algorithm; QxSJLi7t
h~]G6>D9)>
import org.rut.util.algorithm.support.BubbleSort; OO Hw-MW
import org.rut.util.algorithm.support.HeapSort; #E?TE
import org.rut.util.algorithm.support.ImprovedMergeSort; e'FBV[e
import org.rut.util.algorithm.support.ImprovedQuickSort; "B~c/%#PH
import org.rut.util.algorithm.support.InsertSort; '@$YX*[
import org.rut.util.algorithm.support.MergeSort; 0UJ%tPS
import org.rut.util.algorithm.support.QuickSort; G,#]`W@qhK
import org.rut.util.algorithm.support.SelectionSort; <QlpIgr
import org.rut.util.algorithm.support.ShellSort; }9k/Y/.
4&}V3"lg
/** H]6i1j
* @author treeroot 2qw-:
* @since 2006-2-2 ''{REFjK7
* @version 1.0 vr,8i7*0
*/ [z2XK4\e1T
public class SortUtil { bjQp6!TsZ
public final static int INSERT = 1; g>m)|o'
public final static int BUBBLE = 2; _6b?3[Xz
public final static int SELECTION = 3; \{Qd
public final static int SHELL = 4; Kw`{B3"
public final static int QUICK = 5; 0W92Z@_GY
public final static int IMPROVED_QUICK = 6; Rqi=AQ
public final static int MERGE = 7; 1G0U}-6RH
public final static int IMPROVED_MERGE = 8; MX@t[{Gg9
public final static int HEAP = 9; :!SVpCt3
Wchu-]
public static void sort(int[] data) { toq/G,N Q
sort(data, IMPROVED_QUICK); @H{QHi
} NUlp4i~Q
private static String[] name={ D5o[z:V7"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S>-x<'Os
}; Z*+0gJ<Y
i`m&X6)\j
private static Sort[] impl=new Sort[]{ ?ztI8I/
new InsertSort(), JHxy_<p/
new BubbleSort(), /s@t-gTi
new SelectionSort(), 4pvT?s>68
new ShellSort(), w\"~*(M
new QuickSort(), -C]k YQ
new ImprovedQuickSort(), #41xzN
new MergeSort(), 9O8na 'w
new ImprovedMergeSort(), <G9HVMiP
new HeapSort() m*Zq3j
}; [y(DtOR
-8HK_eQn
public static String toString(int algorithm){ (i1JDe
return name[algorithm-1]; N~""Lc&
} p?uk|C2
BBV"nm_(/
public static void sort(int[] data, int algorithm) { Ic 5TtN~/>
impl[algorithm-1].sort(data); |fL|tkGEa
} mH1T|UI
N\,[(LbA&
public static interface Sort { P3Wnso
public void sort(int[] data); PykVXZ7j;
} L701j.7"
50s1o{xwc
public static void swap(int[] data, int i, int j) { o1kTB&E4B
int temp = data; IhIz 7.|
data = data[j]; %DK0s(*w0
data[j] = temp; zBQV2.@
} wMW."gM|
} RP@U0o