[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; AB{zkEuK
} ~0h@p4
int i1=l; &=f?:UZ%
int i2=mid+1; Be9,m!on
for(int cur=l;cur<=r;cur++){ xs&xcRR"
if(i1==mid+1) q6ZewuV.
data[cur]=temp[i2++]; (I`lv=R"j
else if(i2>r) `v-O 4Pk
data[cur]=temp[i1++]; :`4F0
else if(temp[i1] data[cur]=temp[i1++]; a`8]TD
else 4JyA+OD4{
data[cur]=temp[i2++]; IT7],pM
} FUf.3@}
} i&8|@CACb
FQ>kTm`d
} w+r).PS}C
D2GF4%|
改进后的归并排序: }'?qUy3x
8A5/jqnqt
package org.rut.util.algorithm.support; SdN&%(ZE
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import org.rut.util.algorithm.SortUtil; 61b*uoq0w?
oHr0;4Lg6
/** /M'd$k"0z
* @author treeroot U{j4FlB
* @since 2006-2-2 D.-G!0!
* @version 1.0 >28l9U
*/ "h #/b}/
public class ImprovedMergeSort implements SortUtil.Sort { ?"^{:~\N
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private static final int THRESHOLD = 10; B`t/21J
9^9-\DG
/* (@qPyM6~}
* (non-Javadoc) Y mL{uV$
* [V>s]c<4`o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) & Zn`2%
*/ h@Jg9AM
public void sort(int[] data) { *u:,@io7'G
int[] temp=new int[data.length]; 0w: 3/WO
mergeSort(data,temp,0,data.length-1); //;(KmU9
} Hq+QsplG
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private void mergeSort(int[] data, int[] temp, int l, int r) { AorY#oq
int i, j, k; L N Fe7<y
int mid = (l + r) / 2; 3y+~l H:
if (l == r) Ep;i],}
return; gL-kI*Ra
if ((mid - l) >= THRESHOLD) wP*3Hx;S
mergeSort(data, temp, l, mid); o&&`_"18
else Kc95yt
insertSort(data, l, mid - l + 1); qH5nw}]
if ((r - mid) > THRESHOLD) Jfk#E^1
mergeSort(data, temp, mid + 1, r); NJ+$3n om
else vy}_aD{B
insertSort(data, mid + 1, r - mid); 4I$Y"|_e
jpO0dtn3=
for (i = l; i <= mid; i++) { KS<@;Tt
temp = data; :V5 Co!/+
} BWQ`8
for (j = 1; j <= r - mid; j++) { SMIDW}U2S
temp[r - j + 1] = data[j + mid]; m[^)Q9o}
} .d}yQ#5z
int a = temp[l]; 4sntSlz)~k
int b = temp[r]; 7Mq{Py1
for (i = l, j = r, k = l; k <= r; k++) { Il9xNVos#
if (a < b) { Y,GlAr s4
data[k] = temp[i++]; tkR~(h
a = temp; <tBT?#C9+
} else { 9 " t;6
data[k] = temp[j--]; z@,(^~C_
b = temp[j]; Z$g'h1,zW
} X'<RqvDc5
} VBQAkl?(}4
} l"(PP3
Gp \-AwE
/** \Cu=Le^
* @param data k(pJVez
* @param l 1;1;-4k7I
* @param i A$N%deb
*/ l"A/6r!Dp
private void insertSort(int[] data, int start, int len) { >\^oCbqF}~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Pj]^p{>
} ZzNHEV
} M9A1 8d|
} zn 0y`9!n?
} Q-V8=.
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堆排序： = g &
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package org.rut.util.algorithm.support; %hN>o)
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import org.rut.util.algorithm.SortUtil; g%"SAeG<K
l[IL~
/** |n)4APX\Q
* @author treeroot F<4:P=
* @since 2006-2-2 yna!L@ *@,
* @version 1.0 JZ`SV}\`
*/ f.uuXK
public class HeapSort implements SortUtil.Sort{ bR)P-9rs
vR:#g;mnk
/* (non-Javadoc) D.:`]W|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vT0Op e6m
*/ }=)u_q
public void sort(int[] data) { AC(qx:/6
MaxHeap h=new MaxHeap(); 'g,_lF
h.init(data); gJX"4]Ol#}
for(int i=0;i h.remove(); __xmn{{L6P
System.arraycopy(h.queue,1,data,0,data.length); ;$6L_C4B
} .pWRV<25
b#p0s?*
private static class MaxHeap{ uP%VL}%0
.tLRY
void init(int[] data){ v~Dobk/n
this.queue=new int[data.length+1]; F?R6zvive
for(int i=0;i queue[++size]=data; ?_d>-NC
fixUp(size); 8|{ZcW
} 8tR6.09'
} J)B3o$
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private int size=0; o.NU"$\?
&4|]VOf
private int[] queue; hG.}>(VV
Q2Ey RFT
public int get() { ?OF$J|h
return queue[1]; QxLrpM"O
} fqbeO9x
VnSO>O
public void remove() { 7F>]zrbK
SortUtil.swap(queue,1,size--); eA(\#+)X `
fixDown(1); Ncbe{}<md
} O0z-jZ,])
file://fixdown ,"`3N2!Y}
private void fixDown(int k) { jZqa+nG51
int j; mfI[9G
while ((j = k << 1) <= size) { Bf00&PE;
if (j < size %26amp;%26amp; queue[j] j++; 2=;ZJ
if (queue[k]>queue[j]) file://不用交换 hfLe<,
break; sj&(O@~R
SortUtil.swap(queue,j,k); r+[g.`
k = j; nbP}a?XC
} :KvZP:T
} &$CyT6mb^
private void fixUp(int k) { ~s4JGV~R
while (k > 1) { EH2):
int j = k >> 1; lshSRir
if (queue[j]>queue[k]) ym6Emf]
break; sq#C|v/
SortUtil.swap(queue,j,k); U:$zlfV
k = j; n8!|}J
} cwaR#-#
} 2i!R>`
~m=Z>4M
} I:=!,4S;
]wV\=m?z&
} ~l'[P=R+8
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SortUtil： "7+^`?
dfVI*5[Z
package org.rut.util.algorithm; ( zm!_~1
V4"o.G3\o
import org.rut.util.algorithm.support.BubbleSort; st"@kHQ3
import org.rut.util.algorithm.support.HeapSort; OI)k0t^;D
import org.rut.util.algorithm.support.ImprovedMergeSort; 0K^@P#{hd
import org.rut.util.algorithm.support.ImprovedQuickSort; D&mPYxXL
import org.rut.util.algorithm.support.InsertSort; bupW*fD:
import org.rut.util.algorithm.support.MergeSort; sOWP0xY
import org.rut.util.algorithm.support.QuickSort; wd|^m%
import org.rut.util.algorithm.support.SelectionSort; 5?>Q[a.Ne
import org.rut.util.algorithm.support.ShellSort; "N%W5[C{
j^8Hjg
/** 7SkW!5
* @author treeroot ,:}VbQ:3I
* @since 2006-2-2 md{1Jn"
* @version 1.0 78xiT
*/ 6@^ ?dQ
public class SortUtil { B\AyG4J
public final static int INSERT = 1; r\b$/:y<e
public final static int BUBBLE = 2; -6F\=
public final static int SELECTION = 3; u{WI 4n?
public final static int SHELL = 4; aF"PB h=
public final static int QUICK = 5; ]nIVP
public final static int IMPROVED_QUICK = 6; T`v
public final static int MERGE = 7; hZ<FCY,/?
public final static int IMPROVED_MERGE = 8; %:l\Vhhz
public final static int HEAP = 9; C&d,|e "\
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public static void sort(int[] data) { 0[g5[?Vy
sort(data, IMPROVED_QUICK); i0x[w>\-
} UeBSt.
private static String[] name={ 'SG<F,[3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -t`KCf,0
}; |1OF!(:
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private static Sort[] impl=new Sort[]{ P1TTaYu
new InsertSort(), 'zt}\ Dt
new BubbleSort(), o~:({
new SelectionSort(), &{M-<M
new ShellSort(), \3U.;}0_X
new QuickSort(), $dt* 4n'
new ImprovedQuickSort(), uX7"u*@Q*~
new MergeSort(), )buy2#8UW
new ImprovedMergeSort(), \"K:<+RH
new HeapSort() W-RshZ\
}; %I)*5M6
O'~^wu.
public static String toString(int algorithm){ <3k9 y^0
return name[algorithm-1]; P)=$0kR3
} =snJ+yn!
bb/A}< zD
public static void sort(int[] data, int algorithm) { m:;`mBOc3
impl[algorithm-1].sort(data); k lr1"q7
} ^?0WE
y3'K+?4
public static interface Sort { A:sP%c;
public void sort(int[] data); v'y<}U
} zq^eL=%:
OOus*ooo2
public static void swap(int[] data, int i, int j) { !Cm9DzG
int temp = data; .#e?[xxk
data = data[j]; &eg@ZnPn
data[j] = temp; U3>ES"N
} d{'u97GDc
} 3AuLRI