[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; DO~ D?/ia
} v]EMJm6d|
int i1=l; 7Fj8Mp|
int i2=mid+1; C3'xU`=7
for(int cur=l;cur<=r;cur++){ oJA_"xp
if(i1==mid+1) d*8*9CpO:
data[cur]=temp[i2++]; ny KfM5s_
else if(i2>r) Z@s[8wrmPl
data[cur]=temp[i1++]; vn}m-U XA*
else if(temp[i1] data[cur]=temp[i1++]; Va )W[I
else %`i*SF(gV
data[cur]=temp[i2++]; 8\s#law
} p7QZn.,=u
} /?;'y,(Q
fXMY.X>f
} p_I^7 $
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改进后的归并排序: v>keZZOs
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package org.rut.util.algorithm.support; NgTB4I8P
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import org.rut.util.algorithm.SortUtil; -Cyo2wk
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/** O}i+1
* @author treeroot _eGYwBm
* @since 2006-2-2 C:Jfrg`
* @version 1.0 LDQ,SS,
*/ V/#Ra
public class ImprovedMergeSort implements SortUtil.Sort { '8]p]#l
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private static final int THRESHOLD = 10; 0`"oR3JY
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/* t`B@01;8A
* (non-Javadoc) w=#'8ZuU
* NK qIx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [W3X$r~-
*/ wQG?)aaM
public void sort(int[] data) { ,ayEZ#4.m
int[] temp=new int[data.length]; =mXC,<]
mergeSort(data,temp,0,data.length-1); $wAR cS
} Ba[,9l[
Qs\a&Q=0H
private void mergeSort(int[] data, int[] temp, int l, int r) { q=pRe-{
int i, j, k; jJIP $
int mid = (l + r) / 2; x*H#?.E
if (l == r) +j{Cfv$do
return; =!t;e~^8]
if ((mid - l) >= THRESHOLD) 1 !_p
mergeSort(data, temp, l, mid); 1r=cCM
else A,F~*LXm
insertSort(data, l, mid - l + 1); qFWN._R
if ((r - mid) > THRESHOLD) Ry>y
mergeSort(data, temp, mid + 1, r); SVo?o|<
else /<)Vd
insertSort(data, mid + 1, r - mid); KRL.TLgq)
j{lurb)y
for (i = l; i <= mid; i++) { %M`48TW)
temp = data; "}v.>L<P
} d3:GmB .
for (j = 1; j <= r - mid; j++) { ,!_6X9N-h
temp[r - j + 1] = data[j + mid]; #][i!9$
} i2Wvu3,D3-
int a = temp[l]; @Fc:9a@
int b = temp[r]; US$$ADq
for (i = l, j = r, k = l; k <= r; k++) { @dv8 F "v
if (a < b) { ?JZ$M
data[k] = temp[i++]; g4A{RI
a = temp; e@vtJaSu
} else { ]mMJ6n
data[k] = temp[j--]; 42]7N3:'
b = temp[j]; #_.JkY
} l~"T>=jq3
} SAdT#0J
} 2 `>a(
cCZp6^/<x
/** y7hDMQ c'
* @param data 9nN1f@Y
* @param l 36{GZDGQ
* @param i >[Vc$[62
*/ ;p+'?%Y}
private void insertSort(int[] data, int start, int len) { To(I<W|{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :\|A.# U
} GqHW.s5
} =dPokLXn
} Kkp dcc
} 0Ncpi=6
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堆排序： k4iiL<|
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package org.rut.util.algorithm.support; G$f%]A1
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import org.rut.util.algorithm.SortUtil; 6C&&="uww
<kFLwF?PM'
/** [eD0L71[
* @author treeroot [XY%<P3D
* @since 2006-2-2 J- S.m(
* @version 1.0 ;(?tlFc
*/ Dsm1@/"i|7
public class HeapSort implements SortUtil.Sort{ ] :;x,$k
K ~mUO
/* (non-Javadoc) !Q[v"6?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y2I7Zd .
*/ rD=D.1_
public void sort(int[] data) { -g~+9/;n
MaxHeap h=new MaxHeap(); .f_ A%
h.init(data); \<pr28
for(int i=0;i h.remove(); ?zBu`7j
System.arraycopy(h.queue,1,data,0,data.length); c9nR&m8(+
} 'O(=Pz
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private static class MaxHeap{ ! $$>D"
sm-[=d%@L
void init(int[] data){ 83c2y;|8
this.queue=new int[data.length+1]; QP%_2m>yhl
for(int i=0;i queue[++size]=data; r+bGZ
fixUp(size); -~{Z*1`,
} O#U maNj/
} ."+lij=56
8)0]cX
private int size=0; 0:v!'
-qj[ck(y
private int[] queue; rk8pL[|
o^/ #i`)
public int get() { |@AXW
return queue[1]; X6cn8ak3
} OPNRBMD
Iuxf`sd
public void remove() { CI{2(.n4
SortUtil.swap(queue,1,size--); S-Y{Vi"2
fixDown(1); P{9:XSa%
} R->x_9y-R
file://fixdown <(KCiM=E$
private void fixDown(int k) { -iiX!@
int j; _uO$=4Sd
while ((j = k << 1) <= size) { ,m<YSMKX
if (j < size %26amp;%26amp; queue[j] j++; 9InP2u\&:
if (queue[k]>queue[j]) file://不用交换 >T[/V3Z~K
break; KdCrI@^
SortUtil.swap(queue,j,k); 1w=.vj<d8
k = j; NVb}uH*i
} Y2DL%'K^
} tA#$q;S
private void fixUp(int k) { *|=D 0
while (k > 1) { SxYz)aF~
int j = k >> 1; i]c{(gd`
if (queue[j]>queue[k]) W p)!G
break; 'oIE:#b
SortUtil.swap(queue,j,k); zufphS|
k = j; y5sH7`2+5
} tLOGj?/r
} {c*$i^T
K(?V]Mxl6
} Q("m*eMRt
uU 7 <8G
} WPRk>j
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SortUtil： G0 EXgq8
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package org.rut.util.algorithm; BsFO]F5mmX
9:{<:1?
import org.rut.util.algorithm.support.BubbleSort; I#MPJ@*WT
import org.rut.util.algorithm.support.HeapSort; fo,0NxF9
import org.rut.util.algorithm.support.ImprovedMergeSort; Ixn|BCi60A
import org.rut.util.algorithm.support.ImprovedQuickSort; ytY\&m
import org.rut.util.algorithm.support.InsertSort; ZhY{,sy?QO
import org.rut.util.algorithm.support.MergeSort; 0i\>(o
import org.rut.util.algorithm.support.QuickSort; 5}G_2<G
import org.rut.util.algorithm.support.SelectionSort; STnMBz7
import org.rut.util.algorithm.support.ShellSort; aE'nW_f
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/** +DRt2a#
* @author treeroot 3?B1oIHQ
* @since 2006-2-2 vNw(hT5750
* @version 1.0 7"Xy8]i{z
*/ zn>lF
public class SortUtil { edMCj
public final static int INSERT = 1; <Z-Pc?F&(k
public final static int BUBBLE = 2; \)dp
public final static int SELECTION = 3; oSrA4g
public final static int SHELL = 4; fZ-"._9UyH
public final static int QUICK = 5; %$ya>0?mq
public final static int IMPROVED_QUICK = 6; N 8[rWJ#
public final static int MERGE = 7; X}Q4;='C-
public final static int IMPROVED_MERGE = 8; g}hUCx(
public final static int HEAP = 9; 1#x5 o2n
eA1g}ipm
public static void sort(int[] data) { ~+'f[!^
sort(data, IMPROVED_QUICK); \Hp!NbnF$
} _9=87u0
private static String[] name={ `e ZDG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~a_hOKU5
}; 7;p/S#P:
bR7tmJ[)Z
private static Sort[] impl=new Sort[]{ cgG*7E
new InsertSort(), .h <=C&Yg
new BubbleSort(), fcdXj_u
new SelectionSort(), G T~rr*X
new ShellSort(), &n| <NF
new QuickSort(), |y7TYjg6
new ImprovedQuickSort(), M<Bo<,!ua
new MergeSort(), n*9QSyJN]
new ImprovedMergeSort(), S!A:/(^WB
new HeapSort() <9&GOaJ
}; h1q3}-
#v(As)4^
public static String toString(int algorithm){ DTC IVLV
return name[algorithm-1]; FZgf"XM>
} Zw)=Y.y!
)vq}$W!:9
public static void sort(int[] data, int algorithm) { HBp??.r
impl[algorithm-1].sort(data); (72%au
} U)'YR$2<
R>"pJbS;L
public static interface Sort { L<dh\5#p9Y
public void sort(int[] data); pbG-uH^
} N|mggz
}N9PV/a
public static void swap(int[] data, int i, int j) { %S^ke`MhF
int temp = data; _8$xsj4_
data = data[j]; 1CJ1-]S(3
data[j] = temp; pzRVX8
} jy~hLEt7
} Wg%]