[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'",70"\
} bZERh:%o
int i1=l; PN+,M50;1
int i2=mid+1; nLdI>c9R
for(int cur=l;cur<=r;cur++){ @fbvu_-].
if(i1==mid+1) r{p?aG
data[cur]=temp[i2++]; - uliND
else if(i2>r) )1lYfJ
data[cur]=temp[i1++]; 0`,a@Q4
else if(temp[i1] data[cur]=temp[i1++]; pr@8PD2%
else *N< 22w
data[cur]=temp[i2++]; N[dhNK"
} }*IX34
} n3~xiQ'
@2kt6 W
} :m@(S6T m
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改进后的归并排序: (O/hu3
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package org.rut.util.algorithm.support; |hOqz2|
AkT_ZU>
import org.rut.util.algorithm.SortUtil; P0}uTee
+%'0;
/** g&riio7lx
* @author treeroot T~`m'4"+c
* @since 2006-2-2 tUz!]P2BUO
* @version 1.0 vHJ~~if
*/ U%w?muJW
public class ImprovedMergeSort implements SortUtil.Sort { aMh2[I
1UxRN7
private static final int THRESHOLD = 10; 7&|fD{:4U
<Pg.N
/* j~Rh_\>Q
* (non-Javadoc) 6i{W=$RQ
* aHwrFkn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ms^,]Q1{
*/ 3u+~!yz
public void sort(int[] data) { {jggiMwo.v
int[] temp=new int[data.length]; {IqbO>|"O_
mergeSort(data,temp,0,data.length-1); UAUo)VVi"
} )v0m7Lv#/
6Dw[n
private void mergeSort(int[] data, int[] temp, int l, int r) { 7&l
int i, j, k; .NwHr6/s*
int mid = (l + r) / 2; b.j\=c
if (l == r) *gVRMSrx4
return; u_zp?Nc
if ((mid - l) >= THRESHOLD) IjJ3CJ<
mergeSort(data, temp, l, mid); <@@.~Qm'
else 83)2c a
insertSort(data, l, mid - l + 1); YujhpJ<
if ((r - mid) > THRESHOLD) j.AAY?L
mergeSort(data, temp, mid + 1, r); <7?MutHM-
else H[!by)H
insertSort(data, mid + 1, r - mid); m:X;dcq'3
d&.)Dw
for (i = l; i <= mid; i++) { LxsB.jb-
temp = data; Ed_A#@V
} TpZ)v.w~l7
for (j = 1; j <= r - mid; j++) { Tx],- U
temp[r - j + 1] = data[j + mid]; u=RF6V|
} =;^2#UxXA&
int a = temp[l]; ]7c715@
int b = temp[r]; IuB0C!'
for (i = l, j = r, k = l; k <= r; k++) { C!~&c7
if (a < b) { Y/)>\
data[k] = temp[i++]; Jr\4x7a;`~
a = temp; NWv1g{M
} else { :;)K>g,b
data[k] = temp[j--]; UT]LF#.(
b = temp[j]; #Z (B4YO
} LI"ghz=F
} &7JCPw
} 95?$O~I
gbQrSJs!Zh
/** &YqgMC
* @param data %3'80u6BCJ
* @param l e"[o2=v;5
* @param i V mKMj'
*/ Hco[p+
private void insertSort(int[] data, int start, int len) { M(I 2M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0alm/or
} v7xc01x
} a:v&pj+|<
} vYrqZie<
} &*[T
F|%[s|s
堆排序： $WrDZU 2z
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package org.rut.util.algorithm.support; 5?%(j!p5
j`='SzVloW
import org.rut.util.algorithm.SortUtil; Y2QlK1.8V
~48Uch\LG:
/** LIirOf~e;!
* @author treeroot 9.D'!
* @since 2006-2-2 "4oY F:h
* @version 1.0 %R-"5?eTtu
*/ r;I3N+
public class HeapSort implements SortUtil.Sort{ qZG "{8
-:AknQq
/* (non-Javadoc) .)ZK42Qd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O: :X$O7
*/ '@ (WT~g
public void sort(int[] data) { FF)F%o+:w
MaxHeap h=new MaxHeap(); !T#~.QP4
h.init(data); ?b:l.0m
for(int i=0;i h.remove(); )&;?|X+p
System.arraycopy(h.queue,1,data,0,data.length); =Y?M#3P.I
} nO,<`}pV
7%&#V2
private static class MaxHeap{ ?8)_,
CAX|[
void init(int[] data){ Ky|dRbK,
this.queue=new int[data.length+1]; Vf`1'GY
for(int i=0;i queue[++size]=data; /RIvUC1
fixUp(size); #t>w)`bA-
} sFT-aLpL@V
} *"d"
vxzh|uF
private int size=0; OjCTTz
%D)W~q-g
private int[] queue; -WWa`,:
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public int get() { w[S2 ]<
return queue[1]; XkDjA#nx`
} E=_M=5]
t,gKN^P_
public void remove() { G&I\Za;
SortUtil.swap(queue,1,size--); ps\A\aggML
fixDown(1); e23}'qb
} Fo|6 PoSo
file://fixdown dq+VW}[EO
private void fixDown(int k) { F.<sKQ&A
int j; MDZ,a0?4t
while ((j = k << 1) <= size) { lfba
if (j < size %26amp;%26amp; queue[j] j++; y'?ksow
if (queue[k]>queue[j]) file://不用交换 U p=J&^.
break; ae`*0wbv
SortUtil.swap(queue,j,k); /o Q^j'v
k = j; dO =fbmK
} 52 ?TLID
} />=)=CGv;
private void fixUp(int k) { 9*pH[vH
while (k > 1) { kTZ`RW&0
int j = k >> 1; L #c*)
if (queue[j]>queue[k]) .Zv@iL5
break; 9%55R >s$
SortUtil.swap(queue,j,k); `irz'/"p
k = j; r`Y[XzT9
} FW~%xUSE5
} ?:73O`sX:
sOQF_X(.x
} _+73Y'
n]c6nX:'
} xF![3~~3[
cBs:7Pnp%
SortUtil： pxy=edd
;;#28nV
package org.rut.util.algorithm; VUAW/
nQm7At
import org.rut.util.algorithm.support.BubbleSort; @AET.qGC
import org.rut.util.algorithm.support.HeapSort; mux_S2x9m\
import org.rut.util.algorithm.support.ImprovedMergeSort; H <7r
import org.rut.util.algorithm.support.ImprovedQuickSort; TN!8J=sx.
import org.rut.util.algorithm.support.InsertSort; r1dP9MT\8
import org.rut.util.algorithm.support.MergeSort; Jse;@K5y
import org.rut.util.algorithm.support.QuickSort; LE$_qX`L
import org.rut.util.algorithm.support.SelectionSort; &ig6\&1
import org.rut.util.algorithm.support.ShellSort; r:.3P
D&0y0lxI@
/** _gDEIoBp
* @author treeroot otaB$Bb
* @since 2006-2-2 a^wGc+
* @version 1.0 www#.D%'U
*/ "*E06=fiG
public class SortUtil { !Q(xA,p
public final static int INSERT = 1; aLa{zB
public final static int BUBBLE = 2; a;@G
public final static int SELECTION = 3; Fb8~2N"3
public final static int SHELL = 4; wNQhz.>y
public final static int QUICK = 5; sv}k_6XgY
public final static int IMPROVED_QUICK = 6; ?VUW.-
public final static int MERGE = 7; e\o>(is
public final static int IMPROVED_MERGE = 8; -36pkC 6 \
public final static int HEAP = 9; LEu_RU?
k/'>,WE
public static void sort(int[] data) { l}\q }7\)
sort(data, IMPROVED_QUICK); &USKudXmb
} 0i%r+_E_
private static String[] name={ SbrKNADH%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9*`(*>S
}; /XEt2,sI9
qRk<1.
private static Sort[] impl=new Sort[]{ /4K ^-
new InsertSort(), BF >678h
new BubbleSort(), D=ZH? d
new SelectionSort(), "}/$xOl"
new ShellSort(), :<Z>?x
new QuickSort(), :`U@b 6
new ImprovedQuickSort(), {|:ro!&
new MergeSort(), @ ={Hx$zL
new ImprovedMergeSort(), j_w"HiNBA
new HeapSort() i6Zsn#Z7)
}; _d<xxF^q
O4Z_v%2M
public static String toString(int algorithm){ FR5P;Yz%H
return name[algorithm-1]; acG4u+[ ]
} '#Yqs/V
_'OXrT#Q
public static void sort(int[] data, int algorithm) { }wY6^JF
impl[algorithm-1].sort(data); Lt|'("($*
} CGYZEPRR
<.d^jgG(j
public static interface Sort { XXwe/>J
public void sort(int[] data); Qg^Ga0Lf6
} eW"L")
cZVVJUF
public static void swap(int[] data, int i, int j) { +c&oF,=}!P
int temp = data; ON()2@Y4
data = data[j]; ;&K +x@
data[j] = temp; g+:Go9k!F
} <r`^iR)%
} IXA3G7$)