[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; }( F:U#
} z;1dMQ,#
int i1=l; T$D(Y`zdn
int i2=mid+1; ]M*`Y[5"
for(int cur=l;cur<=r;cur++){ I:TbZ*vi~
if(i1==mid+1) u @Ze@N%
data[cur]=temp[i2++]; S=r0tao,!v
else if(i2>r) TxPFl7,r
data[cur]=temp[i1++]; A,_O=hA2I
else if(temp[i1] data[cur]=temp[i1++]; ; R+>}6
else >XgJo7u
data[cur]=temp[i2++]; e n~m)r3&
} Sxq@W8W
} Qf( A
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} jlj ge=#c2
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改进后的归并排序: .b]sQ'
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package org.rut.util.algorithm.support; [y9a.*]u/@
g9" wX?*
import org.rut.util.algorithm.SortUtil; 61H_o7XXk
Xb%Q%"?~
/** vWoppt
* @author treeroot !ddyJJ^a
* @since 2006-2-2 Q[#}Oh6$
* @version 1.0 N4ZV+ |
*/ ({j8|{)+
public class ImprovedMergeSort implements SortUtil.Sort { ?2&= +QaT
dHIk3j-!
private static final int THRESHOLD = 10; S3Y.+. 0U
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/* e El)wZ,A
* (non-Javadoc) H7tviSTd
* jvB[bS`<H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -SM_JR3<
*/ $$m0mK
public void sort(int[] data) { P5?VrZy
int[] temp=new int[data.length]; > mO*.'Gm
mergeSort(data,temp,0,data.length-1); pRun5 )7
} 4tCM2it%
I*N"_uKU
private void mergeSort(int[] data, int[] temp, int l, int r) { eI$V2
int i, j, k; Z>`\$1CI
int mid = (l + r) / 2; )7*'r@
if (l == r) cK1^jH<|
return; $~6MR_Yq
if ((mid - l) >= THRESHOLD) J| N 6r
mergeSort(data, temp, l, mid); <{cY2cx~3
else 6 ^3RfF^W
insertSort(data, l, mid - l + 1); o`c+eMwr(
if ((r - mid) > THRESHOLD) ~Tt@v`}
mergeSort(data, temp, mid + 1, r); C^"zU>W_
else eY :"\c3
insertSort(data, mid + 1, r - mid); rByth,|
vIJ5iLF
for (i = l; i <= mid; i++) { [<53_2]~
temp = data; Eto"B"
} OCrTzz8
for (j = 1; j <= r - mid; j++) { V#w$|2
temp[r - j + 1] = data[j + mid]; jcqUY+T$
} `TJhH<z"%
int a = temp[l]; ^nPy(Q0
int b = temp[r]; :o8`2Z*g
for (i = l, j = r, k = l; k <= r; k++) { nz?[
if (a < b) { xJ$uoy3+
data[k] = temp[i++]; zTcz+3x
a = temp; veq3t$sj
} else { A8&@Vxdz
data[k] = temp[j--]; ;=,-C;`
b = temp[j]; `6VnL)
} C!^A\T7p
} MOQ6&C`7q
} k3$'K}=d
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/** g,\kLTg
* @param data -]0:FKW
* @param l CBd%}il
* @param i &tZIWV1&
*/ v<v;ZR)
private void insertSort(int[] data, int start, int len) { 06&;GW!-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \]<R`YMV
} h&j2mv(
} DD=X{{;D\"
} ( 3B1X
} Em&3g
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堆排序： anW['!T9{s
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package org.rut.util.algorithm.support; ^rJTlh 9
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import org.rut.util.algorithm.SortUtil; )L9eLxI
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/** E'\gd7t ;
* @author treeroot t[q2W"#.
* @since 2006-2-2 y7UU'k`
* @version 1.0 xH2'PEjFM
*/ r7W.}n*
public class HeapSort implements SortUtil.Sort{ R7Qj<,
~}b0zL
/* (non-Javadoc) n3$=&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q$U.vF7BnP
*/ }BM`4/
public void sort(int[] data) { PFp!T [)
MaxHeap h=new MaxHeap(); IQ<G.
h.init(data); Sk53Lc
for(int i=0;i h.remove(); bQ>wyA+G&E
System.arraycopy(h.queue,1,data,0,data.length); %EU_OS(u.{
} F8?,}5j
f0g/`j@Up
private static class MaxHeap{ n@+?tYk*e
.eIs$
void init(int[] data){ g5|&6+t.
this.queue=new int[data.length+1]; HVA:|Z19
for(int i=0;i queue[++size]=data; 7=N%$]DKZ
fixUp(size); 4C?{p%3c
} PJZ;wqTD_
} l\ dPfJ
}K'A/]'
private int size=0; SlB`ktcfI
a&G{3#l
private int[] queue; N>3{!K>/Y:
R7rM$|n=o
public int get() { _:\rB
return queue[1]; Q(<A Yu
} 'G65zz
sBZn0h@
public void remove() { ?M'CTz}<\
SortUtil.swap(queue,1,size--); #6c,_!
fixDown(1); **m8 HD
} 2j4202
file://fixdown &PPnI(s^K
private void fixDown(int k) { EC$F|T0f
int j; Z]Xa:[
while ((j = k << 1) <= size) { qGag{E5!
if (j < size %26amp;%26amp; queue[j] j++; YL*FjpVW
if (queue[k]>queue[j]) file://不用交换 >A D!)&c
break; W2XWb<QSEV
SortUtil.swap(queue,j,k); :a Cf@:']
k = j; 9K}DmS
} 'E#L6,&
} H 2I
private void fixUp(int k) { x(u.(:V
while (k > 1) { Q#yHH]U)X
int j = k >> 1; mH;t)dT
if (queue[j]>queue[k]) N_:!uR
break; Lfx a^0
SortUtil.swap(queue,j,k); e6'0g=Y#
k = j; e;=R8i
} EUt2S_2P
} z}J~X%}e
!Yo2P"
} ^) s6`:
vrmMEWPV
} JUw|nUnl?
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SortUtil： r^.9 |YM5
o]p$ w[5
package org.rut.util.algorithm; o!h::j0,~
w$$pTk|&n
import org.rut.util.algorithm.support.BubbleSort; "d/54PKWx
import org.rut.util.algorithm.support.HeapSort; I[Bp}6G
import org.rut.util.algorithm.support.ImprovedMergeSort; I|*<[/)]y
import org.rut.util.algorithm.support.ImprovedQuickSort; Z]LP18m9kl
import org.rut.util.algorithm.support.InsertSort; /b{@']
import org.rut.util.algorithm.support.MergeSort; #pRbRT9
import org.rut.util.algorithm.support.QuickSort; ~Fvz&dO
import org.rut.util.algorithm.support.SelectionSort; H)TKk%`7
import org.rut.util.algorithm.support.ShellSort; "=]'"'B:
0KExB{K
/** )]Zdaw)X
* @author treeroot 7mnO60Z8N
* @since 2006-2-2 >Heuf"V
* @version 1.0 *9KT@"v
*/ Jyd[Sc)
public class SortUtil { Dp*:oMATx0
public final static int INSERT = 1; @QJPcF"
public final static int BUBBLE = 2; i`9}">7v~
public final static int SELECTION = 3; &gV9h>Kc#
public final static int SHELL = 4; `Q+O#l?
public final static int QUICK = 5; 0p3) t
public final static int IMPROVED_QUICK = 6; X..M!3W
public final static int MERGE = 7; )sIzBC
public final static int IMPROVED_MERGE = 8; {nZP4jze
public final static int HEAP = 9; zwUZ*Se
S5m.oHJI*
public static void sort(int[] data) { }}Q h_(
sort(data, IMPROVED_QUICK); _JpTHpqu
} wD
private static String[] name={ [Ketg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C.=%8|Zy
}; F$v^S+Ch
cPL6(&7
private static Sort[] impl=new Sort[]{ l}S96B
new InsertSort(), \RVfgfe
new BubbleSort(), "OP$n-*@%
new SelectionSort(), uG.`
new ShellSort(), @B+8' b$9
new QuickSort(), |&S^L}V.C
new ImprovedQuickSort(), h{]0 H'g
new MergeSort(), qoQ,3&<
new ImprovedMergeSort(), wMm+E "}W
new HeapSort() &_QD1 TT
}; Nsy>qa7
,uO?f1
public static String toString(int algorithm){ |.~2C14[
return name[algorithm-1]; 2sBYy 8.r
} o 8^!wGY
4.%/u@rAi
public static void sort(int[] data, int algorithm) { z2.OR,R}]
impl[algorithm-1].sort(data); ODCN~7-@
} H-& ktQWK3
k fOd|-
public static interface Sort { vKbGG
public void sort(int[] data); :d<F7`k H
} 0}_1ZU
-oju-gf K
public static void swap(int[] data, int i, int j) { #B$_ily)
int temp = data; X=Y>9
data = data[j]; D#ED?Lqf
data[j] = temp; PVq y\i
} pkIJbI{aS
} (:#4{C