[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; m ?a&XZ
} %&+j(?9
int i1=l; &k /uR;yw
int i2=mid+1; 4+od N.
for(int cur=l;cur<=r;cur++){ 1Z?en
if(i1==mid+1) /RuGh8qzP
data[cur]=temp[i2++]; iK$)Iy0
else if(i2>r) "r!O9X6
data[cur]=temp[i1++]; !e?GS"L~
else if(temp[i1] data[cur]=temp[i1++]; GNzkVy:u
else yVvO!
data[cur]=temp[i2++]; [a;U'v*
} J~6+zBF
} Vf#X[$pc/
W>Eee?
} i2SR.{&
,F7W_f# @3
改进后的归并排序: 1MH[-=[Q
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package org.rut.util.algorithm.support; >;eWgQ6V
aU,Zjm7fp
import org.rut.util.algorithm.SortUtil; (c ?OcwTH
(PjC]`FK
/** XYtDovbv&
* @author treeroot }1P>^I"[Y
* @since 2006-2-2 |*W`}i
* @version 1.0 {)j3Pn
*/ `H6-g=C
public class ImprovedMergeSort implements SortUtil.Sort { ?GPTJ#=j=]
CpuL[|51
private static final int THRESHOLD = 10; :b[ [}'
|*5Kfxq
/* hPa:>e
* (non-Javadoc) B]dvX
* +1R?R9^Fw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n0_q-8r
*/ R _WP r[P
public void sort(int[] data) { CfKvC
int[] temp=new int[data.length]; (+d7cln
mergeSort(data,temp,0,data.length-1); +85i;gO5
} =m.Lw
\jDD=ew
private void mergeSort(int[] data, int[] temp, int l, int r) { ufE;rcYE
int i, j, k; XBE+O7
int mid = (l + r) / 2; A*jU&3#
if (l == r) M=$ qus
return; zdFO&YHTw
if ((mid - l) >= THRESHOLD) V9*Z
mergeSort(data, temp, l, mid); VMPBM:kG
else ?IR]y-r
insertSort(data, l, mid - l + 1); ,U+y)w]ar
if ((r - mid) > THRESHOLD) /EF0~iy
mergeSort(data, temp, mid + 1, r); U|QLc
else 4.:2!Q
insertSort(data, mid + 1, r - mid); a>x3UVf_
u}ULb F
for (i = l; i <= mid; i++) { BbEWa
temp = data; "c8 -xG
} n,hl6[OL7
for (j = 1; j <= r - mid; j++) { P(BjXMd
temp[r - j + 1] = data[j + mid]; Q>Rjv.1
} m~cz
int a = temp[l]; 5+*MqO>
int b = temp[r]; (- `h8M
for (i = l, j = r, k = l; k <= r; k++) { 7\>P@s
if (a < b) { b^[Ab:`}[V
data[k] = temp[i++]; ~.99H
a = temp; qPeaSv]W
} else { hK F*{,'
data[k] = temp[j--]; .?T,>#R
b = temp[j]; 6)i4&
} #9-qF9M
} u~WBu|
} npC:SrI%
"mlVs/nsyG
/** E9e|+$
* @param data '4-J0S<<_
* @param l `|maf=SnY5
* @param i 32nB9[l
*/ a*?bnw?
private void insertSort(int[] data, int start, int len) { nBw4YDR!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {~J'J$hn8
} coa+@g,w7#
} t5: 1' N9P
} L?_'OwaY
} 1t&LNIc|^
a6\0XVU
堆排序： N 4Kj)E@
2d),*Cvf
package org.rut.util.algorithm.support; nn[OC=cDN
?=zF]J:G1w
import org.rut.util.algorithm.SortUtil; A[W3.$s
h9<*+T
/** 6Ih8~Hu
* @author treeroot L'(ei7Z
* @since 2006-2-2 mX8k4$z
* @version 1.0 ^pgVU&-~]/
*/ r<< ]41
public class HeapSort implements SortUtil.Sort{ t&5N{C:
O5X@'.#rU
/* (non-Javadoc) 8EbJ5wu/%S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?|4Y(0N
*/ %gBulvg
public void sort(int[] data) { w[ )97d
MaxHeap h=new MaxHeap(); ,#n$YT7
h.init(data); N@}5Fnk-
for(int i=0;i h.remove(); 90g=&O5@O
System.arraycopy(h.queue,1,data,0,data.length); <}Hfu-PLo
} 1jHugss9|
p>Z18
private static class MaxHeap{ ,xcm:;&
d\c?sYLv
void init(int[] data){ 3|++2Z{},
this.queue=new int[data.length+1]; |E]`rfr
for(int i=0;i queue[++size]=data; 73C7g< Mx
fixUp(size); CuT~ Bj
} ~9Xs=S!
} hIBW$
3[_zz;Y*d
private int size=0; 9NXL8QmC8
2TQyQ%
private int[] queue; MSQz,nn
{>EM=ZZfg
public int get() { hCpX#rg?
return queue[1]; nDG41)|
} {$ a $m
Qqm$Jl!
public void remove() { 9:\#GOg
SortUtil.swap(queue,1,size--); \eH`{Z'.x5
fixDown(1); vZ6_/ew8
} B}?$kp
file://fixdown 0NB5YQ8_]
private void fixDown(int k) { S/?!ESW6
int j; d ,"L8
while ((j = k << 1) <= size) { G~.bi<(v
if (j < size %26amp;%26amp; queue[j] j++; i>elK<R4
if (queue[k]>queue[j]) file://不用交换 c]Z@L~WW
break; 4Su|aWL-
SortUtil.swap(queue,j,k); KU;d[Z@g
k = j; s?j||
} K>a@AXC
} bM@8[&ta
private void fixUp(int k) { Ca]V%g(
while (k > 1) { wC&+nS1
int j = k >> 1; v% c-El%
if (queue[j]>queue[k]) vV$6fvS
break; aG*Mj;J
SortUtil.swap(queue,j,k); +uqP:z
k = j; (Zi,~Wqm$
} pw, <0UhV
} :Vnus @#r
T[(4z@d`5
} :qAF}|6
S\jIs[Dz
} 9coN >y
}57d3s
SortUtil： bVgmjt2&>
#Y_v0.N
package org.rut.util.algorithm; E9N.b.Q)
*B*dWMh
import org.rut.util.algorithm.support.BubbleSort; -|cB7P
import org.rut.util.algorithm.support.HeapSort; c{(4s6D
import org.rut.util.algorithm.support.ImprovedMergeSort; Bk yW
import org.rut.util.algorithm.support.ImprovedQuickSort; KlbUs\E
import org.rut.util.algorithm.support.InsertSort; _N1UL?
import org.rut.util.algorithm.support.MergeSort; TGuvyY
import org.rut.util.algorithm.support.QuickSort; FfSKE
import org.rut.util.algorithm.support.SelectionSort; L"x9O'U
import org.rut.util.algorithm.support.ShellSort; TBU.%3dEyI
1RU+d.&D
/** znq/ %7
* @author treeroot i_'u:P<t
* @since 2006-2-2 KQulz
* @version 1.0 \LP?,<
*/ 4*9WxhJ ]0
public class SortUtil { 6 _n~E e
public final static int INSERT = 1; 1cdX0[sN
public final static int BUBBLE = 2; oMV^W^<
public final static int SELECTION = 3; -<Oy5N
public final static int SHELL = 4; ?ISv|QpC
public final static int QUICK = 5; j0(+Kq:J
public final static int IMPROVED_QUICK = 6; X"fSM #
public final static int MERGE = 7; K/A1g.$
public final static int IMPROVED_MERGE = 8; kf-/rC)>
public final static int HEAP = 9; U#gv ~)\k
D//uwom
public static void sort(int[] data) { gZ 6Hj62D
sort(data, IMPROVED_QUICK); ,!I'0x1OR
} r>kDRIHB
private static String[] name={ i-W!`1LH'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6$'0^Ftm'
}; oc0z1u
LVAnZ'h/|
private static Sort[] impl=new Sort[]{ iJ%`ym4Y
new InsertSort(), hcrx(oJ5
new BubbleSort(), :ySQ[AJ"
new SelectionSort(), F7N4qq1
new ShellSort(), -guVl4 V
new QuickSort(), Z5[f
new ImprovedQuickSort(), I]jK]]@
new MergeSort(), LQ'VhNU
new ImprovedMergeSort(), UEh-k"
new HeapSort() WEZ)>[Xj?
}; U66}nN9
Y)KO*40c
public static String toString(int algorithm){ R1/87eB
return name[algorithm-1]; > Du>vlTY
} R)u ${
?]Z EK8c
public static void sort(int[] data, int algorithm) { 3`^NaQ
impl[algorithm-1].sort(data); QVJvuiUh
} H'2Un(#Al
eGW~4zU
public static interface Sort { n%%u0a%
public void sort(int[] data); 4K<T_B/
} ?6>rQ6tBv
`mo>~c7
public static void swap(int[] data, int i, int j) { 6~y7A<[^
int temp = data; w@Gk#
data = data[j]; :d`8:gv?
data[j] = temp; KGq4tlM6
} P6([[mmG
} bR&<vrMmrA