[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; Q'Q^K
} dPS}\&1
int i1=l; 0I,-1o|s
int i2=mid+1; Q~`n%uYg\{
for(int cur=l;cur<=r;cur++){ z5?xmffB
if(i1==mid+1) *5 5yF`
data[cur]=temp[i2++]; Gg_i:4F
else if(i2>r) TB9ukLG^<<
data[cur]=temp[i1++]; NVQIRQ.
else if(temp[i1] data[cur]=temp[i1++]; r__uPyIMG/
else ke/QFN-`
data[cur]=temp[i2++]; 9G&l{7=
} <)&;9C
} 3K{'~?mM
Bb m1&d#
} >n#Pq{7aF
hD"Tjd` P
改进后的归并排序: 1 #_R`(C{
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package org.rut.util.algorithm.support; N[Fz6,ZG _
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import org.rut.util.algorithm.SortUtil; Y.ic=<0H
6B&':N98
/** 4Vh#Ye:`
* @author treeroot \S _ycn
* @since 2006-2-2 "gYn$4|R7*
* @version 1.0 |#"<{RS+w
*/ (2X`imJ
public class ImprovedMergeSort implements SortUtil.Sort { -(dc1?COi
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private static final int THRESHOLD = 10; E`BL3+kQ
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/* 2!}5shB
* (non-Javadoc) &W*9'vSm.
* X180_Kt2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qn:3s
*/ "4Cb dD//
public void sort(int[] data) { jCkYzQUPz
int[] temp=new int[data.length]; 3nMXfh/
mergeSort(data,temp,0,data.length-1); Pi`}-GUe,
} Enyx+]9
s'RE~,
private void mergeSort(int[] data, int[] temp, int l, int r) { N2WQrTA:S+
int i, j, k; <;G.(CK@n
int mid = (l + r) / 2; B E!HM{-
if (l == r) R^4JM,v9x`
return; rZEL7{
if ((mid - l) >= THRESHOLD) )ERmSWq/u
mergeSort(data, temp, l, mid); c"~+Y2]tL
else K 0R<a~
insertSort(data, l, mid - l + 1); yL{X}:;}
if ((r - mid) > THRESHOLD) Fu].%`*xJ
mergeSort(data, temp, mid + 1, r); 'W(!N%u
else j#6@cO'`
insertSort(data, mid + 1, r - mid); =wEU+R_#o
k/srT<
for (i = l; i <= mid; i++) { \iVb;7r)9:
temp = data; 4Qwv:4La
} UaG })
for (j = 1; j <= r - mid; j++) { H}vq2|MN
temp[r - j + 1] = data[j + mid]; SA!P:Q?h
} P3Ocfpf Bp
int a = temp[l]; ^26vP7
int b = temp[r]; 6_}& WjU'
for (i = l, j = r, k = l; k <= r; k++) { 4Cm+xAXG
if (a < b) { |T3F:],`
data[k] = temp[i++]; m%7T ~
a = temp; I8M^]+c
} else { (@X].oM^y
data[k] = temp[j--]; TuR.'kE@
b = temp[j]; `,~8(rIM
} "0Ca;hSLM2
} IHC {2 ^
} HFlMx
^I!u H1G
/** 1!/WC.0
* @param data bMU0h,|]
* @param l : ZehBu
* @param i *{TB<^ *
*/ |&wwH&<[z
private void insertSort(int[] data, int start, int len) { ol#| .a2O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tg5G`P5PJ
} ~IQ3B$4H&
} {XR3L'X
} NW?.Ge.!P
} -0P(lkylf
<+3-(&
堆排序： N./l\NtZ
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package org.rut.util.algorithm.support; a]NH >d
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import org.rut.util.algorithm.SortUtil; i?^lEqy[
V d`}F0WD
/** J2Y S+%K
* @author treeroot iC(&U YL
* @since 2006-2-2 <e)u8+(
* @version 1.0 Wy:xiP
*/ MVDEVq0
public class HeapSort implements SortUtil.Sort{ k z{_H`5.
0Tp,b (;n
/* (non-Javadoc) C]dK/~Z#r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A4Sb(X|j
*/ ~3'}^V\
public void sort(int[] data) { crvq]J5
MaxHeap h=new MaxHeap(); <?h,;]U
h.init(data); dAba'|Y
for(int i=0;i h.remove(); lJ>OuSd
System.arraycopy(h.queue,1,data,0,data.length); n=_jmR1
} v#Xl
F4:giu ht
private static class MaxHeap{ ^s.necg0
4arqlzlo
void init(int[] data){ 5oOF|IYi
this.queue=new int[data.length+1]; I l2`c}9
for(int i=0;i queue[++size]=data; ~Y)h[
fixUp(size); t?l0L1;
} ))9w)A@
} md S`nhb
I_"KhBM
private int size=0; 8slOB>2#Y
,Y+J.8.H
private int[] queue; E!rgR5Bd
JbR;E`8
public int get() { XSBh+)0Ww
return queue[1]; {BI5lvx:
} F'Lav?^
_]aA58,j
public void remove() { AhA4IOG`.
SortUtil.swap(queue,1,size--); hH.X_X?d%
fixDown(1); D #Ku5~j
} Ew,1*WK!
file://fixdown 6C@W6DR3N
private void fixDown(int k) { 8n2MZ9p]
int j; u#bd*(
while ((j = k << 1) <= size) { gR#lRA/
if (j < size %26amp;%26amp; queue[j] j++; %D_pTD\
if (queue[k]>queue[j]) file://不用交换 }eLnTi{
break; #)BbW40f6
SortUtil.swap(queue,j,k); 5`tMHgQO
k = j; /\-iV)h1@
} 'h*^;3@*
} .5AyB9a%&
private void fixUp(int k) { J{w[vcf
while (k > 1) { xtq='s8e
int j = k >> 1; P\k5%
if (queue[j]>queue[k]) \:/~IZdzF
break; HAca'!p
SortUtil.swap(queue,j,k); UB9n7L(@c
k = j; Ms61FmA4
} ZvVrbj&
} ;;{!wA+"D
0D.qc8/V4.
} l!7O2Ai5
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} 3*<?'O7I0
iVdY\+N!<
SortUtil： "54t7
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package org.rut.util.algorithm; 6 {j}Z*)m
:*<UCn""
import org.rut.util.algorithm.support.BubbleSort; 9vL n#_
import org.rut.util.algorithm.support.HeapSort; z]d2 rzV(_
import org.rut.util.algorithm.support.ImprovedMergeSort; Nk ~"f5q7
import org.rut.util.algorithm.support.ImprovedQuickSort; ~jOn)jBRZ
import org.rut.util.algorithm.support.InsertSort; OA?pBA
import org.rut.util.algorithm.support.MergeSort; 2leTEs5aK`
import org.rut.util.algorithm.support.QuickSort; kKlcK_b;
import org.rut.util.algorithm.support.SelectionSort; *= ;M',nx
import org.rut.util.algorithm.support.ShellSort; _X/`7!f
r!C#PiT}I
/** YYs/r
* @author treeroot W3~xjS"h
* @since 2006-2-2 xp68-&
* @version 1.0 *;u'W|"/~
*/ 8p0ZIrD%
public class SortUtil { QKVFH:"3
public final static int INSERT = 1; (fUpj^E)p
public final static int BUBBLE = 2; [G#PK5C
public final static int SELECTION = 3; [gE_\=FSKu
public final static int SHELL = 4; WJA0 `<~
public final static int QUICK = 5; 1[U`,(C1
public final static int IMPROVED_QUICK = 6; .W*"C
public final static int MERGE = 7; b,r{wrLe)
public final static int IMPROVED_MERGE = 8; XUK!1}
public final static int HEAP = 9; knb 9s`wR
UD6:X&Un
public static void sort(int[] data) { I/vQP+w O
sort(data, IMPROVED_QUICK); PYhRP00}M
} 2M`:/shq
private static String[] name={ \#%1t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YQ _]Jv k
}; -+)06BqF}
|Ym3.hz
private static Sort[] impl=new Sort[]{ umJ!j&(
new InsertSort(), zho$g9*
new BubbleSort(), ,)beK*Iw
new SelectionSort(), 8?z7!k]
new ShellSort(), Eb.k:8?Tn
new QuickSort(), aFf(m-
new ImprovedQuickSort(), Nfo`Q0\[P
new MergeSort(), 8Ts_;uId
new ImprovedMergeSort(), T-)lnrs^
new HeapSort() 1Ax{Y#<
}; \:Vm7Zg
d:&=|kKw
public static String toString(int algorithm){ U5!~@XjG>
return name[algorithm-1]; +>Xe_
} 2^f6@;=M
*{fL t
public static void sort(int[] data, int algorithm) { JK=0juv<E
impl[algorithm-1].sort(data); L,7+26XV"B
} o>Faq+@
@q/E)M?
public static interface Sort { "x~su?KiA
public void sort(int[] data); #[B]\HO
} zg+6< .Sf
Yk @/+PE
public static void swap(int[] data, int i, int j) { 6t!PHA
int temp = data; <Y"h2#M"
data = data[j]; mR3-+dB/
data[j] = temp; 5!V%0EQqw
} q>5K:5
} NO'37d