[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; S[mM4et|
} vZ@g@zB4o0
int i1=l; |3;(~a)%
int i2=mid+1; p<KIF>rf|
for(int cur=l;cur<=r;cur++){ =_ y\Y@J
if(i1==mid+1) xc;DdK=1X
data[cur]=temp[i2++]; M)JADX
else if(i2>r) +I52EXo
data[cur]=temp[i1++]; Vl<9=f7[
else if(temp[i1] data[cur]=temp[i1++]; |SQ|qbe=
else H4:ZTl_$
data[cur]=temp[i2++]; < Dd%
} W"Q!|#;l.
} E-fr}R}
',ZF5T5z@
} 2n|CD|V$ux
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改进后的归并排序: Mra35
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package org.rut.util.algorithm.support; O*G1 QX
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import org.rut.util.algorithm.SortUtil; Hx %$X
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/** /p)F>WR
* @author treeroot Zu21L3
* @since 2006-2-2 P~RhUKfd
* @version 1.0 -7%X]
*/ ^ve14mbF#.
public class ImprovedMergeSort implements SortUtil.Sort { %d;<2b0
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private static final int THRESHOLD = 10; .9h)bf+
8>NwCjN
/* 7,'kpyCj
* (non-Javadoc) ?NG=8.p
* +=eR%|!@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 51by
*/ ~W03{9(Vp8
public void sort(int[] data) { 3c#s|qW
int[] temp=new int[data.length]; XErUS80
mergeSort(data,temp,0,data.length-1); ?Elg?)os
} V8PLFt;
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private void mergeSort(int[] data, int[] temp, int l, int r) { 2f{T6=SK
int i, j, k; *(QH{!-$s
int mid = (l + r) / 2; a1c1k}
if (l == r) @dgH50o[
return; WVX`<
if ((mid - l) >= THRESHOLD) Qi9-z'
mergeSort(data, temp, l, mid); E0l_--
else \+nGOvM
insertSort(data, l, mid - l + 1); 3`F) AWzdr
if ((r - mid) > THRESHOLD) =Z,5$6%)
mergeSort(data, temp, mid + 1, r); M#,Q ^rH#
else j6g@tx^)'
insertSort(data, mid + 1, r - mid); 8=;k"
'bu)M1OLi
for (i = l; i <= mid; i++) { >t <pFh
temp = data; OP! R[27>
} ]@ M5_%p
for (j = 1; j <= r - mid; j++) { 3l4NC03I&
temp[r - j + 1] = data[j + mid]; SVWIEH0?
} u[oUCTY
int a = temp[l]; p_2pU)%
int b = temp[r]; PmX2[7
for (i = l, j = r, k = l; k <= r; k++) { >v+jh(^
if (a < b) { E D"!n-Hq
data[k] = temp[i++]; b]Z@^<_E
a = temp; Yu3zM79'k
} else { }< 5F
data[k] = temp[j--]; r"{<%e
b = temp[j]; xJwG=$o
} s9)8b$t]
} c EnkU]
} M+P$/Wk
)3A{GZj#6
/** ZKpvDH'
* @param data w:i:~f .
* @param l DcD{*t?x
* @param i kv{}C)kt3
*/ !Ng=Yk>3
private void insertSort(int[] data, int start, int len) { }8K4-[\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZWUP^V
} 3gZ8.8q3
} 3_$w|ET
} jXg
} BJ}D%nm}
P9Q~r<7n
堆排序： !CTxVLl"F
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package org.rut.util.algorithm.support; ~Bi_7 Q
s1N?/>lmB
import org.rut.util.algorithm.SortUtil; 23\RJpKb
0&+k.Vg
/** 9xI GV!
* @author treeroot zYER
* @since 2006-2-2 lSwcL
* @version 1.0 ,:Z^$
*/ &53]sFZ
public class HeapSort implements SortUtil.Sort{ 3VO2,PCZ
c}Z6V1]QP
/* (non-Javadoc) J:*-gwv9*m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )u%je~Vw
*/ ~&dyRtW4
public void sort(int[] data) { feM6K!fL`
MaxHeap h=new MaxHeap(); ZP\M9Ja
h.init(data); bm~W EX
for(int i=0;i h.remove(); C4$:mJ>y
System.arraycopy(h.queue,1,data,0,data.length); Sl2iz?
} -Apc$0ZsN
}L=/A7Nk>
private static class MaxHeap{ N"tFP9;K
BR`ygrfe
void init(int[] data){ df}r% i
this.queue=new int[data.length+1]; <W8t|jt
for(int i=0;i queue[++size]=data; 9m2, qr|
fixUp(size); M9\#Aq&\i
} "I6P=]|b
} =WbOwI)u
Bq\F?zk<
private int size=0; g#]" hn
3f.b\4 U
private int[] queue; t_z>Cl^u
%M F;`;1
public int get() { K7knK
return queue[1]; tc;'oMUP
} S^@S%Eg
} p FQRSOZ
public void remove() { .T<=z
SortUtil.swap(queue,1,size--); 3981ie
fixDown(1); VZr>U*J[:
} B(a-k?
file://fixdown v4,h&JLt
private void fixDown(int k) { ?lGG|9J\
int j; $4kH3+WJ
while ((j = k << 1) <= size) { aimarU
if (j < size %26amp;%26amp; queue[j] j++; ~)LH='|h\}
if (queue[k]>queue[j]) file://不用交换 E907fX[R~
break; Ix@&$!'k
SortUtil.swap(queue,j,k); /@ !CKh`
k = j; :o-,SrORM
} E:sz$\Ht)
} {N2g8W:
private void fixUp(int k) { >WJf=F`_H
while (k > 1) { K5ZC:Ks
int j = k >> 1; l:0s2
if (queue[j]>queue[k]) oBQ#eW aY
break; p^<yj0Y
SortUtil.swap(queue,j,k); ,[S+T.Cu
k = j; ~LJY6A@y
} ptatzp]c#
} 5Wyz=+?m|
qf@q]wtar
} 8KB>6[H!wE
`e9$,h|4
} Q?ahr~qo
B[=(#W
SortUtil： geQ{EwO8n
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package org.rut.util.algorithm; P./V6i<:
S=R7`a<.5
import org.rut.util.algorithm.support.BubbleSort; +;$oJJ
import org.rut.util.algorithm.support.HeapSort; ](tx<3h
import org.rut.util.algorithm.support.ImprovedMergeSort; t*z~5_/
import org.rut.util.algorithm.support.ImprovedQuickSort; 'E/*d2CDM(
import org.rut.util.algorithm.support.InsertSort; 0iULCK
import org.rut.util.algorithm.support.MergeSort; f.aSKQD
import org.rut.util.algorithm.support.QuickSort; `p;eIt
import org.rut.util.algorithm.support.SelectionSort; M;cO0UIwO
import org.rut.util.algorithm.support.ShellSort; 0&qr
xq-17HKs
/** IdYzgDH
* @author treeroot d(vsE%/!
* @since 2006-2-2 EXP%Mk/
* @version 1.0 2LrJ>Mi
*/ ~$'\L
public class SortUtil { ,NnhHb2\
public final static int INSERT = 1; 3iw{SEY
public final static int BUBBLE = 2; Nx{$}
public final static int SELECTION = 3; ju}fL<<e
public final static int SHELL = 4; 0TfS=scT
public final static int QUICK = 5; a#mNE*Dg
public final static int IMPROVED_QUICK = 6; h\plQ[T
public final static int MERGE = 7; I1[g&9,
public final static int IMPROVED_MERGE = 8; A7(hw~+@
public final static int HEAP = 9; 7.DtdyM
-.g|l\
public static void sort(int[] data) { NCxqh<
sort(data, IMPROVED_QUICK); RoCfJ65
} 0|R#Tb;Y
private static String[] name={ R@Gq)P9?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %6AW7q t
}; KD/V aN
pF ^#}L
private static Sort[] impl=new Sort[]{ xs\!$*R
new InsertSort(), uB!kM
new BubbleSort(), *~m+Nc`D,N
new SelectionSort(), Q{k At%
new ShellSort(), 8G5Da|\
new QuickSort(), >iS`pb
new ImprovedQuickSort(), 'J,T{s1J
new MergeSort(), !61Pl/uQ
new ImprovedMergeSort(), !LkWzn3
new HeapSort() jV(6>BAI_
}; d Le-nF
.{;Y'Zc14S
public static String toString(int algorithm){ RI68%ZoL
return name[algorithm-1]; sXd8rj:o
} rr#K"SP
Vd=yr'?
public static void sort(int[] data, int algorithm) { J8Yd1.Qj
impl[algorithm-1].sort(data); `%09xMPu
} _+ .\@{c
o)OUWGjb/K
public static interface Sort { qlA7tU2p&
public void sort(int[] data); k`GA\&zt
} J9K3s_SN
^(*n]
public static void swap(int[] data, int i, int j) { oI^4pwnh
int temp = data; VCtH%v#S;.
data = data[j]; PjN =k;
data[j] = temp; ',GS#~
} 4t)%<4
} %pXAeeSY`;