[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; .g|pgFM?
} 8vP d~te
int i1=l; f'.yM*
int i2=mid+1; <Jvrmm[
for(int cur=l;cur<=r;cur++){ :#|77b0
if(i1==mid+1) SZ1C38bd,.
data[cur]=temp[i2++]; ,Y5+UzE@
else if(i2>r) v~xG*e
data[cur]=temp[i1++]; lq9c2xK
else if(temp[i1] data[cur]=temp[i1++]; HL!-4kN <$
else 2KzKNe(
data[cur]=temp[i2++]; `kz_q/K
} --/ .
} k&?QeXW
4u&l@BUr
} xGH%4J\
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改进后的归并排序: "?il07+w%
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package org.rut.util.algorithm.support; P&SR;{:y
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import org.rut.util.algorithm.SortUtil; cN :;ir
~KNxAxyVi
/** '1{~y3
* @author treeroot C[Fh^
* @since 2006-2-2 Q{a!D0;4v
* @version 1.0 2Hd6
*/ tDwXb>
public class ImprovedMergeSort implements SortUtil.Sort { VEn%_9(]
nDo|^{!L`
private static final int THRESHOLD = 10; +u Lu.-N
+GGj*sD
/* jIW:O
* (non-Javadoc) !Zwl9DX3
* _Yhpj}KZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aL`pvsnF
*/ /bb4nM_E/
public void sort(int[] data) { ULJI`I|m
int[] temp=new int[data.length]; rm cy-}e
mergeSort(data,temp,0,data.length-1); PNG'"7O
} (=\P|iv
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private void mergeSort(int[] data, int[] temp, int l, int r) { m$ JQ[vgh
int i, j, k; k~gQn:.Cx
int mid = (l + r) / 2; N,O[pTwj
if (l == r) COT;KC6 n
return; Du{]r[[C
if ((mid - l) >= THRESHOLD) 4VooU [Ka(
mergeSort(data, temp, l, mid); PM|K*,3J
else BAPi<U'D
insertSort(data, l, mid - l + 1); IS!+J.2
if ((r - mid) > THRESHOLD) W,<Vr2J[
mergeSort(data, temp, mid + 1, r); 1zM`g_(#
else f+1]#"9i|
insertSort(data, mid + 1, r - mid); \i&yR]LF
#"Zr#P{P
for (i = l; i <= mid; i++) { %_u3Np
temp = data; a0n F U
} =:2V4H(F
for (j = 1; j <= r - mid; j++) { 9-@w(kMu
temp[r - j + 1] = data[j + mid]; k-89(
} rd"]$_P8O
int a = temp[l]; *0iP*j/]
int b = temp[r]; 0Icyi#N
for (i = l, j = r, k = l; k <= r; k++) { k`&mHSk-
if (a < b) { h8h4)>:
data[k] = temp[i++]; z[';HJ0O;
a = temp; o1Xk\R{
} else { &3JbAJ|;X
data[k] = temp[j--]; _ 9k^Hd[L$
b = temp[j]; ?;*mSQA`J
} !98s[)B:
} |%tR#!&[:g
} @wg*~"d
A>PM'$"sT
/** NLdUe32A
* @param data )sL:iGU
* @param l WOwIJrP
* @param i N( /PJJ~
*/ We9mkwK7C
private void insertSort(int[] data, int start, int len) { w3& F e=c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1{,WY(,c
} 9LFg":
} [Ea5Bn;~!
} GJW1|Fk
} Y,0O&'>
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堆排序： ,mRN;|N
auO^v;s
package org.rut.util.algorithm.support; bT>^% H3
@^P=jXi<
import org.rut.util.algorithm.SortUtil; GoFC!nx
J>+Dv?Ni$
/** C!.6:Aj
* @author treeroot dJ|]W|q<
* @since 2006-2-2 6IvLr+I
* @version 1.0 rbJ-vEzo.#
*/ `R; ct4-
public class HeapSort implements SortUtil.Sort{ _h.[I8xgYG
p?!]sO1l
/* (non-Javadoc) a.gu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yEz2F3[ S
*/ B0YY7od
public void sort(int[] data) { ufm#H#n)#X
MaxHeap h=new MaxHeap(); }q~A( u
h.init(data); E`'+1
for(int i=0;i h.remove(); L$jRg
System.arraycopy(h.queue,1,data,0,data.length); e0hT
} i%z}8GIt'
MjLyB^M
private static class MaxHeap{ )`U T#5
Bd7A-T)q!
void init(int[] data){ Tn-H8;Hg
this.queue=new int[data.length+1]; CjO/q)vV
for(int i=0;i queue[++size]=data; lxxK6;r~>
fixUp(size); 21;n0E
} #S1)n[
} `yxk Sb
-Y+[`0$'
private int size=0; Xe%n.DW m
&'(:xjN
private int[] queue; k|BEAdQ%M
5v?6J#]2
public int get() { jsL'O;K/
return queue[1]; D9Q%*DLd$_
} $y`|zK|G-
GHoPv-#
public void remove() { 6%5A&&O(b
SortUtil.swap(queue,1,size--); gsAcn
fixDown(1); qg'm<[
} yJgnw6>r2
file://fixdown gzuM>lf*{
private void fixDown(int k) { m2 OP=z@)
int j; JM M\
while ((j = k << 1) <= size) { AA@J~qd u
if (j < size %26amp;%26amp; queue[j] j++; K;YK[M1!
if (queue[k]>queue[j]) file://不用交换 MenI>gd?
break; O[-wm;_(=*
SortUtil.swap(queue,j,k); 8^HMK$
k = j; MEo+S
} 6C
} ) .#,1
private void fixUp(int k) { n RXf\*"3
while (k > 1) { C~:aol i;
int j = k >> 1; Ot(EDa9}IJ
if (queue[j]>queue[k]) =n$,Vv4A
break; ku\_M
SortUtil.swap(queue,j,k); <FGM/e4
k = j; *X,vu2(I-=
} `< VoZ/v
} lMlXK4-
\24neD4cM@
} [5:F
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} a-O9[?G/x
:pOX,
SortUtil： ZfMJU
@aBZ|8
package org.rut.util.algorithm; B<_T"n'#b
/X8b=:h
import org.rut.util.algorithm.support.BubbleSort; Mc{1Cdj
import org.rut.util.algorithm.support.HeapSort; iT IW;Cv
import org.rut.util.algorithm.support.ImprovedMergeSort; Ei}B9 &O
import org.rut.util.algorithm.support.ImprovedQuickSort; O@Xl_QNxc!
import org.rut.util.algorithm.support.InsertSort; )M}bc1 _
import org.rut.util.algorithm.support.MergeSort; /eZAAH
import org.rut.util.algorithm.support.QuickSort; K\o!
import org.rut.util.algorithm.support.SelectionSort; 3WaYeol`
import org.rut.util.algorithm.support.ShellSort; -6Cxz./#yS
lQ)ZsFs=
/** TN` pai0
* @author treeroot ^${-^w@,%V
* @since 2006-2-2 $] w&`F-
* @version 1.0 tt#M4n@
*/ =@B9I<GKf
public class SortUtil { U4M!RdG
public final static int INSERT = 1; ~)WE
public final static int BUBBLE = 2; AnIENJ
public final static int SELECTION = 3; 6\'v_A O
public final static int SHELL = 4; =q>eoXp
public final static int QUICK = 5; <L:v28c
public final static int IMPROVED_QUICK = 6; \@gs8K#
public final static int MERGE = 7; !t[X/iu
public final static int IMPROVED_MERGE = 8; `/0X].s#o
public final static int HEAP = 9; \'j%q\Bl;
oDA1#-
public static void sort(int[] data) { >m%\SuXq
sort(data, IMPROVED_QUICK); >|H=25N>;
} jG8ihi
private static String[] name={ fv#e 8y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Mx[tE?!2
}; 03_tt7
a\^DthZ!;|
private static Sort[] impl=new Sort[]{ #^#N%_8
new InsertSort(), /.Gx n0
new BubbleSort(), JF!!)6!2#
new SelectionSort(), tUL(1:-C
new ShellSort(), }_XKO\
new QuickSort(), eDIjcZ
new ImprovedQuickSort(), Ow mI*`
new MergeSort(), )|'? uN7
new ImprovedMergeSort(), yD5T'np<4
new HeapSort() X]Sr]M^EK
}; kLADd"C
e-\J!E'1F
public static String toString(int algorithm){ ,8EeSnI
return name[algorithm-1]; $UO7AHk
} b8Y1.y"#
WWHT;ST
public static void sort(int[] data, int algorithm) { 1%EIP-z
impl[algorithm-1].sort(data); w/>k
} HI)ks~E/
nBZqhtr
public static interface Sort { &2#<6=}
public void sort(int[] data); Vg&`f
} ATH0n>)
~@MIG
public static void swap(int[] data, int i, int j) { xw]Zo<F
int temp = data; n"d~UV^Uw
data = data[j]; LKftNSkg"
data[j] = temp; Z'PL?;&+R
} %UY=VE\F
} -9vAY+s.