[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; 2lz {_9
} G\/IM
int i1=l; nu 7lh6o=
int i2=mid+1; Lpm?#g uR
for(int cur=l;cur<=r;cur++){ b:B[3|
if(i1==mid+1) T]2U fi.
data[cur]=temp[i2++]; U1^l+G^,~
else if(i2>r) k&DGJ5m$.
data[cur]=temp[i1++]; G)+Ff5e0L[
else if(temp[i1] data[cur]=temp[i1++]; H'Iq~Ft1
else G `Izf1B`I
data[cur]=temp[i2++]; ^-L{/'[8M
} rsSue_Q
} p+D=}O
b{HhS6<K?
} FU]4oKx
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改进后的归并排序: h3t$>vs2F"
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package org.rut.util.algorithm.support; [`bZ5*&
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import org.rut.util.algorithm.SortUtil; +wts 7,3
l4`^!
/** ("F)
* @author treeroot Kfd_uXL>
* @since 2006-2-2 tJ1-DoU
* @version 1.0 4.k`[q8
*/ y$h"ty{g
public class ImprovedMergeSort implements SortUtil.Sort { A5+5J_)*
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private static final int THRESHOLD = 10; !c_u-&b)
iwkJ~(5z
/* p)z-W(
* (non-Javadoc) `G0*l|m>
* n'3u]~7^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V(I7*_ZFl
*/ @$ftG
public void sort(int[] data) { /yt7#!tm+
int[] temp=new int[data.length]; zkG>u,B}
mergeSort(data,temp,0,data.length-1); ,]U[W
} x.G"D(
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private void mergeSort(int[] data, int[] temp, int l, int r) { M4H"].Zm
int i, j, k; i?W]*V~ply
int mid = (l + r) / 2; >@:667i,`
if (l == r) y;,y"W
return; OgTSx
if ((mid - l) >= THRESHOLD) o]p#%B?mZ
mergeSort(data, temp, l, mid); w#<^RKk
else O$(c.(_$
insertSort(data, l, mid - l + 1); #'c%
if ((r - mid) > THRESHOLD) ,M{Q}:$+4
mergeSort(data, temp, mid + 1, r); Rj&qh`
else @5GBuu^j
insertSort(data, mid + 1, r - mid); *k!(ti[
p}f-c
for (i = l; i <= mid; i++) { D8EeZUqU
temp = data; tU(y~)]
} 3~:0?Zuq
for (j = 1; j <= r - mid; j++) { Vbo5`+NAis
temp[r - j + 1] = data[j + mid]; QK'`=MU
} uX98iJ
int a = temp[l]; 0 S2v"(_T
int b = temp[r]; KZW'O b>[
for (i = l, j = r, k = l; k <= r; k++) { +q l
if (a < b) { yz8-&4YRNd
data[k] = temp[i++]; DQMPAj.
a = temp; `i9N)3 X
} else { /M]eZ~QKD
data[k] = temp[j--]; =hPG_4#
b = temp[j]; fqN75['n
} :b<KX%g
} l:q8Pg)
} d&5c_6oW
Q%I#{+OT
/** ?Q;kZmQl
* @param data [f=.!\0\
* @param l A3z/Bz4]:#
* @param i M5F(<,n;
*/ J"5jy$30'$
private void insertSort(int[] data, int start, int len) { luibB&p1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r?>Vx-
} RZW$!tyI=
} 3IGCl w(
} A*a7\id!y
} W=UqX{-j)
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堆排序： 0r0c|*[+4z
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package org.rut.util.algorithm.support; V@$GC$;
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import org.rut.util.algorithm.SortUtil; c6t2Q6zV
<b6s&"%=
/** P@2tR5<R
* @author treeroot cES;bwQ
* @since 2006-2-2 #fwzFS \XL
* @version 1.0 C%0<1mp
*/ XO0>t{G
public class HeapSort implements SortUtil.Sort{ {%=S+89l
3T"#T&eL
/* (non-Javadoc) ,>&?ty9o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y*}AX%8`e~
*/ 'CS^2Z
public void sort(int[] data) { j\!~9
MaxHeap h=new MaxHeap(); KLG6QBkj
h.init(data); sP9^IP
for(int i=0;i h.remove(); 4xv9a;fP
System.arraycopy(h.queue,1,data,0,data.length); hK:#+hg,
} y=-{Q
Uy(vELB
private static class MaxHeap{ ;:AG2zE!
2^cAK t6bC
void init(int[] data){ 9@(O\xr
this.queue=new int[data.length+1]; -zPm{a
for(int i=0;i queue[++size]=data; d|>9rX+f
fixUp(size); ]&&I|K_
} 9+]ZH.(YE
} F"-S~I7'L
:5r:I[FFy
private int size=0; Coga-: 2vu
1f+*Tmc5]Q
private int[] queue; .Ql;(Wyl
<FXQxM5"
public int get() { Bx\#`Y
return queue[1]; b%=1"&JI:
} \B*k_W/r@
Iu)L3_+
public void remove() { $~ pr+Ei
SortUtil.swap(queue,1,size--); {;]uL`abi?
fixDown(1); d [\>'>
} 6&g!ZE'G
file://fixdown ^?H\*N4
private void fixDown(int k) { :GN)7|:
int j; d[~au=b
while ((j = k << 1) <= size) { )v*v
if (j < size %26amp;%26amp; queue[j] j++; /AK*aRU^
if (queue[k]>queue[j]) file://不用交换 k$9Gn9L%
break; XS}Zq4H
SortUtil.swap(queue,j,k); +W V@o'
k = j; [,\'V0
} Jm{As*W>
} rg#qSrHp
private void fixUp(int k) { Ig40#pA
while (k > 1) { OlD7-c2L]
int j = k >> 1; G:E+s(x
if (queue[j]>queue[k]) <[ g$N4
break; :vn0|7W4
SortUtil.swap(queue,j,k); Mft0Dj/
k = j; X+(aQ >y
} /t%"Dh8x
} 7?kXgR[#d
9*GL@_c
} !Szgph"ul
y1@"H/nYJ
} j8D$/
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SortUtil： 4fU5RB7%
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package org.rut.util.algorithm; N7j]yvE
3rXL0&3w%
import org.rut.util.algorithm.support.BubbleSort; ,b2O^tJF#
import org.rut.util.algorithm.support.HeapSort; I&Eg-96@
import org.rut.util.algorithm.support.ImprovedMergeSort; erAZG)
import org.rut.util.algorithm.support.ImprovedQuickSort; } (GQDJp
import org.rut.util.algorithm.support.InsertSort; ;GSfN
import org.rut.util.algorithm.support.MergeSort; {ra Esb-X
import org.rut.util.algorithm.support.QuickSort; H|(*$!~e
import org.rut.util.algorithm.support.SelectionSort; I'6ed`|
import org.rut.util.algorithm.support.ShellSort; Eo25ir%
\8C*O{w
/** RY'\mt"W2
* @author treeroot 0SGczgg
* @since 2006-2-2 &Hp\("
* @version 1.0 aaqjE
*/ *YEIG#`
public class SortUtil { =t>`<T|(
public final static int INSERT = 1; <R]Wy}2-
public final static int BUBBLE = 2; j:vD9sdQ
public final static int SELECTION = 3; .+yJh
public final static int SHELL = 4; sN[@mAoH
public final static int QUICK = 5; RIVN>G[;L
public final static int IMPROVED_QUICK = 6; .q;RNCUt
public final static int MERGE = 7; Liz6ob
public final static int IMPROVED_MERGE = 8; ht[TMdV
public final static int HEAP = 9; Tl0+Bq
1<Ztk;$A
public static void sort(int[] data) { @_tA"E
sort(data, IMPROVED_QUICK); (*^E7 [w
} C*6bR? I9
private static String[] name={ 5xn0U5U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <?`e9o
}; (}7o a9Q<
N[?4yV2s
private static Sort[] impl=new Sort[]{ B )3SiU
new InsertSort(), ?;r7j V/`j
new BubbleSort(), y^Xxa'y
new SelectionSort(), $K>d\{@+7
new ShellSort(), -iZjs
new QuickSort(), J~ gkGso
new ImprovedQuickSort(), ^ 8Nr%NJ
new MergeSort(), k3htHCf*G$
new ImprovedMergeSort(), zj$Z%|@$
new HeapSort() EXM/>PG
}; ?2bE=|
]a@v)aa-
public static String toString(int algorithm){ g5TLX&Bd
return name[algorithm-1]; ysP/@;jC
} @5nkI$>3z
7$!Bq#
public static void sort(int[] data, int algorithm) { @0x.n\M_
impl[algorithm-1].sort(data); tGy%n[ \
} oz5lt4
!*QA;*e
public static interface Sort { C&MqUj"]
public void sort(int[] data); $EHn;~w T
} Ns7l-mb
J,2v~Dq
public static void swap(int[] data, int i, int j) { ',-X#u
int temp = data; fVe-esAw
data = data[j]; sC*E;7gT,
data[j] = temp; [}g5Z=l
} .dq.F#2B;
} xVmUmftD