[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; s3/iG37K
} nF)b4`Nd
int i1=l; f@j)t%mh
int i2=mid+1; f`gs/R
for(int cur=l;cur<=r;cur++){ qk{+Y
if(i1==mid+1) @W1F4HYds
data[cur]=temp[i2++]; 2Y7u M;8
else if(i2>r) N|rB~
data[cur]=temp[i1++]; baO'FyCs9&
else if(temp[i1] data[cur]=temp[i1++]; 9cnLf#
else yrF"`/zv6|
data[cur]=temp[i2++]; SSAf<44e
} hr/H vB
} 0|}]=XN^
"c5bz
} 61@;3yV
W=S<DtG2
改进后的归并排序: ${F4x"x
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package org.rut.util.algorithm.support; q`0wG3
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import org.rut.util.algorithm.SortUtil; tkX?iqKQ
obz|*1M?
/** ubQbEv{(,
* @author treeroot WAUgbImc{
* @since 2006-2-2 l+UUv]:1
* @version 1.0 $<s;YhM:u)
*/ k9_c<TSzu
public class ImprovedMergeSort implements SortUtil.Sort { ~-tKMc).X
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private static final int THRESHOLD = 10; +B&,$ceyaJ
SjL&\),
/* ?/1Eu47
* (non-Javadoc) K(3_1*e
* )j+G4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X-<l+WP
*/ JC.nfxG@:
public void sort(int[] data) { .Cz9?]jyI
int[] temp=new int[data.length]; _+6aD|7x
mergeSort(data,temp,0,data.length-1); Js'j}w
} \0fk^
*A([1l&]i
private void mergeSort(int[] data, int[] temp, int l, int r) { =v{Vl5&>?
int i, j, k; ;i,3KJ[L
int mid = (l + r) / 2; O%)Wo?)HM
if (l == r) ["1Iz{
return; };;k5z I%
if ((mid - l) >= THRESHOLD) ms{iQ:'9
mergeSort(data, temp, l, mid); _]t^F9l
else wZ%a:Z4TcM
insertSort(data, l, mid - l + 1); d` X1cG
if ((r - mid) > THRESHOLD) !dV2:`|+
mergeSort(data, temp, mid + 1, r); @#2KmM~I
else 60#eTo?}o
insertSort(data, mid + 1, r - mid); >pm`(zLn
E0)43
for (i = l; i <= mid; i++) { D$U`u[qjtS
temp = data; Pk{%2\%&2
} d#CAP9n;'
for (j = 1; j <= r - mid; j++) { &e\UlM22
temp[r - j + 1] = data[j + mid]; X.GK5Phd
} uZml.#@4
int a = temp[l]; phi9/tO\u
int b = temp[r]; FaLc*CU
for (i = l, j = r, k = l; k <= r; k++) { s4[PwD
if (a < b) { A&S n^mw
data[k] = temp[i++]; yi;pn Z
a = temp; *6aIDFNl
} else { \P;2s<6i\
data[k] = temp[j--]; jdX*
b = temp[j]; )?;+<,
} V [Wo9Y\
} a7}O.NDf
} yHf:/8Z
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/** KA? J:
* @param data FEA t6
* @param l }u]7x:lh
* @param i KP&$Sl
*/ =`ECM7
private void insertSort(int[] data, int start, int len) { |@BX*r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {u[_^
} PJL [En*
} D@)L?AB1f
} 57Bxx__S4`
} JqV}>"WMV
im@QJ:
堆排序： 97k}{tG
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package org.rut.util.algorithm.support; 8?LHYdJ
@xeJ$ rlu
import org.rut.util.algorithm.SortUtil; )I"I[jDw
PYiO l
/** %.WW-S3
* @author treeroot 6xLQ
* @since 2006-2-2 wpg7xx!
* @version 1.0 Ot{~mMDp
*/ 5><T#0W?
public class HeapSort implements SortUtil.Sort{ f0{j/+F_o
xri(j,mU
/* (non-Javadoc) k\X yR4r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8RT<?I^5
*/ @=6oB3tQA
public void sort(int[] data) { U%n>(!d
MaxHeap h=new MaxHeap(); l:~/%=
h.init(data); jAdZS\?w
for(int i=0;i h.remove(); 9t!Agxm
System.arraycopy(h.queue,1,data,0,data.length); 7/K L<T9@
} X0knM}5
LKBh{X0%(
private static class MaxHeap{ q[(1zG%NbA
05Q4$P
void init(int[] data){ biPj(Dd
this.queue=new int[data.length+1]; +DaKP)H\:
for(int i=0;i queue[++size]=data; ^<3{0g-"AW
fixUp(size); 2B"tT"f
} *j<{3$6Ii
} mFmxEv
tL M@o|:
private int size=0; Fl!D2jnN
mD%IHzbn H
private int[] queue; (}rBnD
iB5q"hoZC
public int get() { F*_+k
return queue[1]; ]xGpN ]u
} n#sK31;yb
?2q0[T?e
public void remove() { kGAB'
SortUtil.swap(queue,1,size--); BO2s(8
fixDown(1); rX0 ?m:&m
} M+I9k;N6&
file://fixdown _WZ{i,
private void fixDown(int k) { y>cLG5v
int j; 'e_e*.z3
while ((j = k << 1) <= size) { tt|P-p-
if (j < size %26amp;%26amp; queue[j] j++; ~14|y|\/
if (queue[k]>queue[j]) file://不用交换 4"UH~A;^
break; cl`7|;v|?
SortUtil.swap(queue,j,k); {<1uV']x
k = j; G#ELQ/Q
} HL-'\wtl
} nd$92H
private void fixUp(int k) { SLNq%7apx
while (k > 1) { jz Siw z
int j = k >> 1; putRc??o;
if (queue[j]>queue[k]) mDk6@Gd@U
break; ]^8CtgC
SortUtil.swap(queue,j,k); ]$#9B-uB
k = j; 6&QOC9JW+7
} BLAF{vVaf
} W>qu~ak?x
XMz*}B6GQ
} NwdrJw9
X(BX+)YR
} t/_\w"
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SortUtil： R"l6|9tmP
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package org.rut.util.algorithm; p]<)6sZ
,N;2"$+E
import org.rut.util.algorithm.support.BubbleSort; @eDs)mY
import org.rut.util.algorithm.support.HeapSort; 6(x53y__
import org.rut.util.algorithm.support.ImprovedMergeSort; ]O{i?tyX
import org.rut.util.algorithm.support.ImprovedQuickSort; ^vTx%F
import org.rut.util.algorithm.support.InsertSort; `%^w-'
import org.rut.util.algorithm.support.MergeSort; &['L7
import org.rut.util.algorithm.support.QuickSort; OjNOvh&N
import org.rut.util.algorithm.support.SelectionSort; ;nJ2i?"
import org.rut.util.algorithm.support.ShellSort; oRJ!TAbD
D?UURURf
/** <6s@eare8
* @author treeroot ExN$J
* @since 2006-2-2 +>%51#2.Q
* @version 1.0 ! 2knSS
*/ +'+Nr<
public class SortUtil { _n!>*A!
public final static int INSERT = 1; Kv9FqrDj
public final static int BUBBLE = 2; kM[!UOnC!<
public final static int SELECTION = 3; )q.ZzijG/
public final static int SHELL = 4; 8 R7w$3pp\
public final static int QUICK = 5; '9zKaL
public final static int IMPROVED_QUICK = 6; Q`NdsS2
public final static int MERGE = 7; Ju&FwY+
public final static int IMPROVED_MERGE = 8; zGNW5S9G
public final static int HEAP = 9; E:k]Z
9+$IulOvk
public static void sort(int[] data) { %W$b2N{l
sort(data, IMPROVED_QUICK); %#PWD7a\
} >,tJq%
private static String[] name={ sa _J6~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tIV{uVM[|D
}; YJ-<t6
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private static Sort[] impl=new Sort[]{ n%G[Y^^,
new InsertSort(), Hz[1c4)'F
new BubbleSort(), Q`6hJgyL
new SelectionSort(), &j ;91wEn
new ShellSort(), &<_q00F
new QuickSort(), Qds:*]vGS
new ImprovedQuickSort(), nqx0#_K-E
new MergeSort(), tCoE4Ed
new ImprovedMergeSort(), Nn-k hl|11
new HeapSort() dtTfV.y4w
}; .qKfhHJ
{Rb;1 eYj
public static String toString(int algorithm){ It/hXND`
return name[algorithm-1]; xLLTp7b(
} K7.ayM 0
Gc*=n*@^K
public static void sort(int[] data, int algorithm) { a&2x;diF
impl[algorithm-1].sort(data); iOCs%J
} #@5VT*/7
D|<_96_m
public static interface Sort { SK&1l`3
public void sort(int[] data); y29G#Y4J
} "#gS?aS
0_-o]BY
public static void swap(int[] data, int i, int j) { k%\y,b*
int temp = data; n%RaEL
data = data[j]; X2;72
data[j] = temp; K>LS8,8V
} :;hX$Qz
} 6[RTL2&W