[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; 'Kzr-)JS
} q|$>H6H4b
int i1=l; +s(IQt
int i2=mid+1; #[0\=B-
for(int cur=l;cur<=r;cur++){ ctUF/[_w;
if(i1==mid+1) ]1|Ql*6y,
data[cur]=temp[i2++]; m`\i+
else if(i2>r) Ril21o! j
data[cur]=temp[i1++]; fov=Yd!
else if(temp[i1] data[cur]=temp[i1++]; n:^"[Le
else yK%GsCJd:
data[cur]=temp[i2++]; Z(k\J|&9C
} q'Pz3/mk
} #u<oEDQ
'f?&EsIV?
} sAD P~xvU
M$]O=2h+2
改进后的归并排序: 'K@{vB
,7fc41O3V
package org.rut.util.algorithm.support; ,8xP8T~Kmv
VkTlPmr
import org.rut.util.algorithm.SortUtil; bhqq
igj={==m
/** _+Jf.n20
* @author treeroot _D2bGZN
* @since 2006-2-2 Ub'%pU
* @version 1.0 5e/qgI)M5
*/ |DFvZ6}
public class ImprovedMergeSort implements SortUtil.Sort { $nfBvf
kToVBU$
private static final int THRESHOLD = 10; inPdV9
CEX}`I*-
/* Rgfc29(8
* (non-Javadoc) 3u?`q%Y-e
* b,rH&+2H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :<N6i/
*/ gaw4NZd)0
public void sort(int[] data) { M)`HK .
int[] temp=new int[data.length]; =~\]3g
mergeSort(data,temp,0,data.length-1); R*Xu(89
} 2GiUPtO&Gj
` Y{>2UFX
private void mergeSort(int[] data, int[] temp, int l, int r) { |ilv|UV
int i, j, k; F%PwIB~cy
int mid = (l + r) / 2; @3-,=x
if (l == r) 8NaL{j1`
return; X/E7o92\
if ((mid - l) >= THRESHOLD) GJIWG&C03
mergeSort(data, temp, l, mid); eC>"my`
else jJ*@5?A
insertSort(data, l, mid - l + 1); '9*5-iO
if ((r - mid) > THRESHOLD) 2/yXY_L
mergeSort(data, temp, mid + 1, r); Wa[x`:cT?u
else (2 T#/$
insertSort(data, mid + 1, r - mid); ySwYV
IU Y> ih
for (i = l; i <= mid; i++) { UTDcX
temp = data; .1.J5>/n
} hncS_ZA
for (j = 1; j <= r - mid; j++) { G}!7tU
temp[r - j + 1] = data[j + mid]; N+CXOI=6x
} =zeFK_S!
int a = temp[l]; eeW' [
int b = temp[r]; *M> iZO*@
for (i = l, j = r, k = l; k <= r; k++) { >aEL;V=}P
if (a < b) { XJx,9trH
data[k] = temp[i++]; .e`,{G(5q7
a = temp; M11"<3]D
} else { w=f0*$ue+w
data[k] = temp[j--]; ds*m6#1b
b = temp[j]; Sao>P[#x
} {fog<1c
} (;;J,*NP
} b!i`o%Vb
nE/=:{~Ws
/** D4< -8
* @param data i(Ip(n
* @param l \*f;!{P{
* @param i (Ij0AeJ#
*/ |h5kg<Zgo
private void insertSort(int[] data, int start, int len) { ,f}h}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6(>3P
} 9<xTu>7J
} 8AT;8I<K
} cyW;,uT)D
} m)s xotgXf
: @'fpN
堆排序： PC*m% ?+
"XCU'_k=
package org.rut.util.algorithm.support; YecT 96%
6fh{lx>
import org.rut.util.algorithm.SortUtil; n vm^k
2 9q?$V(
/** hlX>K
* @author treeroot S8\+XJ
* @since 2006-2-2 cp$.,V
* @version 1.0 &k1/Z*/
*/ :`D'jF^S
public class HeapSort implements SortUtil.Sort{ ylk{!
}04Dg'
/* (non-Javadoc) 3 h#s([uL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '<TD6jBs
*/ sp|q((z{
public void sort(int[] data) { g;8M<`qvf
MaxHeap h=new MaxHeap(); M~-h-tG
h.init(data); C1 W>/?XC
for(int i=0;i h.remove(); +4Q[N;[+*
System.arraycopy(h.queue,1,data,0,data.length); ugno]5Ni
} qk&gA}qF
(wife#)~
private static class MaxHeap{ >;,gGH
?FN9rhAC
void init(int[] data){ =nzFd-P
this.queue=new int[data.length+1]; m$?.Yig?
for(int i=0;i queue[++size]=data; {ih:FcI
fixUp(size); )!i!3
} TFO74^
} (v!mR+\x
)!A 2>
private int size=0; H<,bq*@
[<yz)<<
private int[] queue; V{0%xz #
AuAT]`
public int get() { Je^Y&a~
return queue[1]; &3I$8v|!?
} ilv_D~|
zj{(p Z1
public void remove() { '*4iqPR;
SortUtil.swap(queue,1,size--); uoHqL IpQ
fixDown(1); PK+ x6]x
} "qS!B.rt:
file://fixdown AFGwT%ZD
private void fixDown(int k) { ';6X!KY+]
int j; Wab.|\c
while ((j = k << 1) <= size) { +8f>^*:u
if (j < size %26amp;%26amp; queue[j] j++; VD/&%O8n
if (queue[k]>queue[j]) file://不用交换 &$F[/[Ds+
break; LJWTSf"f?
SortUtil.swap(queue,j,k); iS
k = j; D"cKlp-I6|
} ,E?4f @|X
} p.C1nh
private void fixUp(int k) { <(YF5Xm6$h
while (k > 1) { &hI>L
int j = k >> 1; e\r7BW\Y
if (queue[j]>queue[k]) 4{Udz!
break; hO6RQ0Iv@
SortUtil.swap(queue,j,k); E?Cj/o
k = j; ~M*gsW$
} Hd0Xx}3&
} VhvTBo<cw
P>wZ~Hjk
} ]RD5Ex!K?
4fty~0i=z
} 4%7s259%
Fg=v6j4W
SortUtil： :!O><eQw
s@~/x5jwCs
package org.rut.util.algorithm; U Du~2%
o,FUfO}F
import org.rut.util.algorithm.support.BubbleSort; iNJAZ6@+
import org.rut.util.algorithm.support.HeapSort; Dx3%KS
import org.rut.util.algorithm.support.ImprovedMergeSort; qlUzr.^-
import org.rut.util.algorithm.support.ImprovedQuickSort; ~^7r?<aKc
import org.rut.util.algorithm.support.InsertSort; TsD;Kl1
import org.rut.util.algorithm.support.MergeSort; F\LsI;G
import org.rut.util.algorithm.support.QuickSort; x: ~d@
import org.rut.util.algorithm.support.SelectionSort; -~O/NX
import org.rut.util.algorithm.support.ShellSort; 6m[9b*s7
wyw<jH
/** 0`n 5x0R
* @author treeroot TQJF+;%
* @since 2006-2-2 azX`oU,l
* @version 1.0 "w&/m}E,[
*/ {|6z+vR
public class SortUtil { s.:r;%a
public final static int INSERT = 1; i&&qbZt
public final static int BUBBLE = 2; ?3jdg]&
public final static int SELECTION = 3; !SF^a6jT
public final static int SHELL = 4; <%KUdkzEP
public final static int QUICK = 5; fxtxu?A>
public final static int IMPROVED_QUICK = 6; qq;b~ 3kW
public final static int MERGE = 7; wmYvD<
public final static int IMPROVED_MERGE = 8; N9]xJgTze
public final static int HEAP = 9; kcS6_l
GN%(9N'W
public static void sort(int[] data) { O2v.
sort(data, IMPROVED_QUICK); VAKy^nR5j
} ?N>pZR
private static String[] name={ 2EfflZL3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r1Z<:}ZwK
}; [5Y<7DS
vg(K$o{BT
private static Sort[] impl=new Sort[]{ cy1jZ1)
new InsertSort(), RH1uVdJ1
new BubbleSort(), &N\[V-GP2G
new SelectionSort(), ;+`uER
new ShellSort(), 'msmXX@q
new QuickSort(), 2U9&l1P=
new ImprovedQuickSort(), 0M8.U
new MergeSort(), \ e,?rH
new ImprovedMergeSort(), @\}YAa>>"I
new HeapSort() JD~aUB%
}; nbxR"UH
*IZf^-=Q
public static String toString(int algorithm){ mP-2s;q
return name[algorithm-1]; AuCWQ~
} Gzm$OHbn
.7Kk2Y
public static void sort(int[] data, int algorithm) { 3ATjsOL
impl[algorithm-1].sort(data); m;/i<:`
} l2&hBacT
f0oek{
public static interface Sort { FC}oL"kk
public void sort(int[] data); :'*DMW~
} >;nS8{2o
+v15[^F
public static void swap(int[] data, int i, int j) { k^%_V|&W/(
int temp = data; d 4O
data = data[j]; s[c^"@HT
data[j] = temp; Kt `
} @vs@>CYdz
} 7GZq|M_:y