[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; Ax=)J{4v
} 16@<G
int i1=l; F+BCzsm7$
int i2=mid+1; @}PX:*c
for(int cur=l;cur<=r;cur++){ :YkAp9civ
if(i1==mid+1) {=&({ cS
data[cur]=temp[i2++]; uxKO"
else if(i2>r) G[u6X_Q
data[cur]=temp[i1++]; tZg)VJQys
else if(temp[i1] data[cur]=temp[i1++]; ndN*X'
else >hG*=4oh
data[cur]=temp[i2++]; hiV!/}'7
} }{,Wha5\n
} up8d3
>e.KD)qA
} ?5};ONjN
#J5_z#-Q;
改进后的归并排序: U6H3T0#
a\,V>}e
package org.rut.util.algorithm.support; NZ8X@|N
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import org.rut.util.algorithm.SortUtil; Tz9 (</y
pJl/d;Cyrb
/** K(lVAKiP]
* @author treeroot ;;CNr_
* @since 2006-2-2 (OwGp3g
* @version 1.0 C}jrx^u>
*/ 'TqF}a7
public class ImprovedMergeSort implements SortUtil.Sort { wm?%&V/#
*""W`x
private static final int THRESHOLD = 10; i+T5(P$
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/* 5efN5Kt
* (non-Javadoc) SfY9PNck\
* %FqQ+0^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t"J{qfNs
*/ !:esdJH
public void sort(int[] data) { L0=`1q
int[] temp=new int[data.length]; <rui\/4NJ
mergeSort(data,temp,0,data.length-1); fJk'5kv
} Sj/v:
#k>A,
private void mergeSort(int[] data, int[] temp, int l, int r) { o>yXEg
int i, j, k; MwQt/Qv=
int mid = (l + r) / 2; fiU#\%uJg
if (l == r) # SJJ@SM
return; _"t>72 `
if ((mid - l) >= THRESHOLD) S+t2k&pm
mergeSort(data, temp, l, mid); *6=9 8C4I
else )xz_}6b]
insertSort(data, l, mid - l + 1); NZ!I >
if ((r - mid) > THRESHOLD) 1#+|RL4o
mergeSort(data, temp, mid + 1, r); f4d-eXGwx`
else p_JWklg^
insertSort(data, mid + 1, r - mid); gk5Gf l
mZ:#d;0
for (i = l; i <= mid; i++) { r>*+d|c4
temp = data; HmU6:8V *Z
} #D{Eq8dp
for (j = 1; j <= r - mid; j++) { 9Nv?j=*$
temp[r - j + 1] = data[j + mid]; X$P(8'[9A
} [[N${C
int a = temp[l]; ~>0H k}Hv
int b = temp[r]; i tk/1
for (i = l, j = r, k = l; k <= r; k++) { ?0JNaf
if (a < b) { [^/a`Kda8
data[k] = temp[i++]; 2_M+o]Z^
a = temp; }o[<1+W(.
} else { q j9q
data[k] = temp[j--]; 61gyx6v
b = temp[j]; DYgB_Iak
} uT<<G)v)
} 9^Web~yi#
} MI:%Eq
d`5AQfL&
/** YvP62c \
* @param data 9~a5R]x2
* @param l P-8QXDdr
* @param i LH`2Y,E
*/ nf&5oE^
private void insertSort(int[] data, int start, int len) { $o$WFV+h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /<k5"C%z
} UH\{:@GjNO
} VUHf-bKl
} E GZiWBr
} 1:@ScHS
ke<5]&x
堆排序： Lh.-*H
>@4AxV\
package org.rut.util.algorithm.support; 3kF+wifsz
R1%J6wZq
import org.rut.util.algorithm.SortUtil; Q%J,:J
S}]B|Q
/** OZ"76|H1`
* @author treeroot !g=b=YK
* @since 2006-2-2 R2 J A(Hn
* @version 1.0 = 8y,7u)
*/ jWh)bsqI!
public class HeapSort implements SortUtil.Sort{ !)W#|sys&
]Ge>S?u
/* (non-Javadoc) ryA+Lli.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |68/FJZ,5
*/ -O-?hsV)y
public void sort(int[] data) { g4+Hq *
MaxHeap h=new MaxHeap(); .ns=jp
h.init(data); :^>&t^E
for(int i=0;i h.remove(); u5KAwMw%Q
System.arraycopy(h.queue,1,data,0,data.length); /nX_Q?mo
} IX<9_q
:7dc;WdM
private static class MaxHeap{ '}bmDb*
&o1k_!25
void init(int[] data){ V*Xr}FE
this.queue=new int[data.length+1]; )"6"g9A
for(int i=0;i queue[++size]=data; 1cRF0MI
fixUp(size); e+VE FWz
} h9iQn<lp4.
} F8Mf,jnPs
#qD[dC$[t
private int size=0; ]\L+]+u~
gm!sLZ!X
private int[] queue; 8.I3%u
3=} P l,
public int get() { asLrXGGyT
return queue[1]; |R!ozlL{}
} KHJ wCv
Vx>Q
public void remove() { pQC|_T#u
SortUtil.swap(queue,1,size--); s| Q1;%Tj
fixDown(1); *n[BBz
} c813NHW
file://fixdown <X1lq9 lW
private void fixDown(int k) { _p'@.P
int j; -"H0Qafm
while ((j = k << 1) <= size) { w1VYU>
if (j < size %26amp;%26amp; queue[j] j++; "5sA&^_#_
if (queue[k]>queue[j]) file://不用交换 T.-tV[2
break; zn_#}}e;G
SortUtil.swap(queue,j,k); 7-~)/7L
k = j; ~%f$}{
} 8Djki]
} DQ[7p(
private void fixUp(int k) { d&f!\n_~
while (k > 1) { 3?L[ohKH?:
int j = k >> 1; r )_*MPY
if (queue[j]>queue[k]) {d0-.
break; 7y)Ar 8!D
SortUtil.swap(queue,j,k); fk>{
k = j; ;c DMcKKIA
} 2efdJ&eIV
} BF;}9QebmS
/;1O9HJa
} Hz==,NR-W
#:/27
} FH$q,BI!R
_G'A]O/BZD
SortUtil： x#zj0vI-8
A,=> |&*
package org.rut.util.algorithm; 1\Pjz Lj
u^CL }t*
import org.rut.util.algorithm.support.BubbleSort; - _6`0
import org.rut.util.algorithm.support.HeapSort; .9,x_\|G*
import org.rut.util.algorithm.support.ImprovedMergeSort; "bWx<
import org.rut.util.algorithm.support.ImprovedQuickSort; lQvgq
import org.rut.util.algorithm.support.InsertSort; T:H~Y+qnt
import org.rut.util.algorithm.support.MergeSort; `YE=B{q
import org.rut.util.algorithm.support.QuickSort; S7#dyAX8
import org.rut.util.algorithm.support.SelectionSort; j|N<6GSke
import org.rut.util.algorithm.support.ShellSort; zH9*w:"4<_
.cw)Y#;IG
/** ,R3TFVV!?
* @author treeroot m.! M#x2!
* @since 2006-2-2 Di4GaKa/
* @version 1.0 >w,jaQ
*/ M+HhTW;I=
public class SortUtil { =l${p*ABQ
public final static int INSERT = 1; yG7H>LF?8
public final static int BUBBLE = 2; ^~7Mv^A
public final static int SELECTION = 3; :l1-s]
public final static int SHELL = 4; fiD,HGx i
public final static int QUICK = 5; B$x@I\(M
public final static int IMPROVED_QUICK = 6; i'"#{4I
public final static int MERGE = 7; Rt&5s)O'
public final static int IMPROVED_MERGE = 8; y@1QVt04
public final static int HEAP = 9; .y3E@0a
3;> z %{
public static void sort(int[] data) { ]j6K3
sort(data, IMPROVED_QUICK); )cZHBG.0H
} H)"]I3
private static String[] name={ xa<KF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O"\_%=X9
}; }Bsh!3D<.
#)twk`!^
private static Sort[] impl=new Sort[]{ X"r.*fb;N
new InsertSort(), x|dP-E41\
new BubbleSort(), qBh@^GxY),
new SelectionSort(), oSkQ/5hg.
new ShellSort(), _od /)#
new QuickSort(), G e]NA]<
new ImprovedQuickSort(), g}gGm[1SUo
new MergeSort(), m{X{h4t
new ImprovedMergeSort(), S<cz2FlV
new HeapSort() 7 @}`1>97
}; q9j~|GE|
Dykh|"
public static String toString(int algorithm){ f5b|,JJ
return name[algorithm-1]; I2*(v%.-
} {f)aFGp
Kl%[fjI)
public static void sort(int[] data, int algorithm) { wCR! bZ w
impl[algorithm-1].sort(data); pUF JQ*
} '-Cx-=
fHEIys,{
public static interface Sort { t!6uz
public void sort(int[] data); a=A12<
} ]Sa#g&}T>
8]`s&d@GY
public static void swap(int[] data, int i, int j) { GIcq|Pe
int temp = data; zuW4gJ
data = data[j]; HR8YPU5
data[j] = temp; 0Ui_Trlc
} ecJjE 56P
} 1hgIR^;[b