[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; Ac`;st%l.
} {$33B'wk
int i1=l; ^_W40/c3
int i2=mid+1; >g}G}=R~3
for(int cur=l;cur<=r;cur++){ 6pp$-uS
if(i1==mid+1) S)7/0N79A
data[cur]=temp[i2++]; ix&'0IrX*
else if(i2>r) lP3h<j
data[cur]=temp[i1++]; orqJ[!u)`
else if(temp[i1] data[cur]=temp[i1++]; y' [LNp V
else cU8xUpq
data[cur]=temp[i2++]; <cj{Qk
} Ryv_1gR!
} 0` 5e
I2[]A,f,
} '3Q3lM'lh
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改进后的归并排序: >{nH v)
rt}^4IqL
package org.rut.util.algorithm.support; ?lKhzH.T
i\Wdo/c-H
import org.rut.util.algorithm.SortUtil; %\6Q .V#s
*yez:qnx
/** 9]7u_
* @author treeroot h/m6)m.D
* @since 2006-2-2 +TSSi em
* @version 1.0 v* ~3Z1
*/ suVmg-d
public class ImprovedMergeSort implements SortUtil.Sort { FFvCi@oT
*x(Jq?5O7X
private static final int THRESHOLD = 10; >2lwWXA
pj8azFZ
/* g7n"
* (non-Javadoc) ?fK1
* BC77<R!E)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \Y5W!.(%w
*/ q-_' W,
public void sort(int[] data) { Z a(|(M H
int[] temp=new int[data.length]; 3CZS)
mergeSort(data,temp,0,data.length-1); 6gU{(H
} "#4dW7E
@D[`Oj)
private void mergeSort(int[] data, int[] temp, int l, int r) { {HrZ4xQnpV
int i, j, k; d5!!Ut
int mid = (l + r) / 2; J^ G
if (l == r) Apfnx7Fv
return; ;Gd~YGW^#
if ((mid - l) >= THRESHOLD) [po "To
mergeSort(data, temp, l, mid); ^+/kr/
else %l!xkCKA
insertSort(data, l, mid - l + 1); OZ(dpV9.S
if ((r - mid) > THRESHOLD) T?wzwGp-[
mergeSort(data, temp, mid + 1, r); C5X(U:
else /nQ`&q
insertSort(data, mid + 1, r - mid); s([dGD$i
RE"^ )-
for (i = l; i <= mid; i++) { cUk*C
temp = data; \?lz&<
} 5v _P Oq
for (j = 1; j <= r - mid; j++) { fZ{[]dn[
temp[r - j + 1] = data[j + mid]; +!yXTC
} bw S*]!*
int a = temp[l]; z&}-8JykH
int b = temp[r]; |J>WC}g@n
for (i = l, j = r, k = l; k <= r; k++) { s V }+eU
if (a < b) { =RKSag&
data[k] = temp[i++]; f.xA_Y>
a = temp; 8dO?K*J,H'
} else { 0.;}]v
data[k] = temp[j--]; EgM*d)X
b = temp[j]; JL^2l$up
} ',=g;
} 5V5w:U>_z
} S Xr%kndS
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/** #R&H&1
* @param data j*R,m1e8
* @param l "484n/D
* @param i [V}, tO|
*/ iK;opA"
private void insertSort(int[] data, int start, int len) { \RG!@$i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MMQ;mw=^]
} v~)LO2y
} n/Dp"4H%q
} /-M@[p&
} ,kM)7!]N
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堆排序： zfI}Q}p
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package org.rut.util.algorithm.support; cP>o+-)
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import org.rut.util.algorithm.SortUtil; q1{H~VSn"
^{yk[tHpS
/** -:Rp'SJ
* @author treeroot EL{vFP
* @since 2006-2-2 nt :N!suP3
* @version 1.0 T)iW`vZg8
*/ ;;U:Jtn2
public class HeapSort implements SortUtil.Sort{ 9Kv|>#zff
b[ w;i]2
/* (non-Javadoc) !CY&{LEYn0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [iS$JG-
*/ -ysn&d\rV
public void sort(int[] data) { [2c{k
MaxHeap h=new MaxHeap(); XNH4vG |
h.init(data); (p)!Mq "^
for(int i=0;i h.remove(); sM2MLh'D
System.arraycopy(h.queue,1,data,0,data.length); b/("Y.r=
} 6W2hr2Zy9
=H`Q~Xx
private static class MaxHeap{ ml!5:r>
<[~,uR7
void init(int[] data){ F5T3E?_
this.queue=new int[data.length+1]; l.=p8-/$'7
for(int i=0;i queue[++size]=data; g=8un`]7
fixUp(size); !q"cpL'4
} 42C<1@>zO
} !cX[-}Q
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private int size=0; hpbf&S4
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private int[] queue; 9$*s8}|
7<\C?`q"
public int get() { C(?blv-vM0
return queue[1]; V-yUJ#f8[
} tT%/r,
o^p
public void remove() { M[]A2'fS
SortUtil.swap(queue,1,size--); 5"KlRuv%
fixDown(1); 2umv|]n+l|
} 8{ c!).
file://fixdown [:EvTY
private void fixDown(int k) { ]ZoPQUS?
int j; $)~
while ((j = k << 1) <= size) { Q[4: xkU
if (j < size %26amp;%26amp; queue[j] j++; fxQN+6;
if (queue[k]>queue[j]) file://不用交换 $iw%(H
break; %yS3&Ju
SortUtil.swap(queue,j,k); 3251Vq %
k = j; f>$``.O
} V|D]M{O
} X@A1#z+s0]
private void fixUp(int k) { %eWqQ3{P]
while (k > 1) { }Fb!?['G5
int j = k >> 1; 4"?^UBr
if (queue[j]>queue[k]) SX0_v_%M
break; Q /x8 #X
SortUtil.swap(queue,j,k); LRb,VD:/Y
k = j; 4_?7&G0(
} 'fd1Pj9~$
} ib6^x:HGU
AONDx3[
} 2'0K WYM
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} SI:ifR&T
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SortUtil： r#i?j}F}
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package org.rut.util.algorithm; ,El!fgL
2\D8.nQr
import org.rut.util.algorithm.support.BubbleSort; ;t#]2<d*
import org.rut.util.algorithm.support.HeapSort; LJlZ^kh
import org.rut.util.algorithm.support.ImprovedMergeSort; f:JlZ&
import org.rut.util.algorithm.support.ImprovedQuickSort; p<Z3tD;Z
import org.rut.util.algorithm.support.InsertSort; )u:Q) %$t
import org.rut.util.algorithm.support.MergeSort; #o`Ny4sq/
import org.rut.util.algorithm.support.QuickSort; &dB-r&4;+
import org.rut.util.algorithm.support.SelectionSort; %q3$|>
import org.rut.util.algorithm.support.ShellSort; !RvRGRSyF
lEjwgk {
/** /! ajsn
* @author treeroot F'RUel_%
* @since 2006-2-2 =3xE:
* @version 1.0 QP@<)`1t9
*/ m` AK~O2
public class SortUtil { D=f7NVc>Q
public final static int INSERT = 1; : esg(
public final static int BUBBLE = 2; z,SYw &S
public final static int SELECTION = 3; Aj>[z8!,
public final static int SHELL = 4; }GwVKAjP
public final static int QUICK = 5; 3Hi+Z}8
public final static int IMPROVED_QUICK = 6; ],etZ%z&
public final static int MERGE = 7; C)-^<
public final static int IMPROVED_MERGE = 8; \*vHB`.,ey
public final static int HEAP = 9; Nh?|RE0t
QbFHfA2Ij
public static void sort(int[] data) { q<vf,D@{ !
sort(data, IMPROVED_QUICK); I&yVx8aH}
} Wzq>JNny
private static String[] name={ $m$;v<PSe
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vsB*rP=
}; ;i uQ?MR3
. RVVWqW
private static Sort[] impl=new Sort[]{ n 1b(\PA
new InsertSort(), Z3KO90O!8
new BubbleSort(), ='?:z2lJ
new SelectionSort(), Z4TL6]^R
new ShellSort(), w42OF7f
new QuickSort(), zk_Eb?mhwV
new ImprovedQuickSort(), :Sg&0Wj+#j
new MergeSort(), .>g1$rj
new ImprovedMergeSort(), ,$*IzL~
new HeapSort() $"JpFT
}; NR%Y+8^M
,Z9>h[JF
public static String toString(int algorithm){ iOw3MfO
return name[algorithm-1]; gbBy/_b
} unl1*4e+
K]oM8H1
public static void sort(int[] data, int algorithm) { ^y.nDs%ZT7
impl[algorithm-1].sort(data); M+>`sj
} RSfM]w}Hq#
+ZsX*/TOn
public static interface Sort { Z$KLl((
public void sort(int[] data); -!M,75nU
} g:ErZ;[
M6|I6M<
public static void swap(int[] data, int i, int j) { B/f0P(7
int temp = data; fN%jJ-[d
data = data[j]; MZv]s
data[j] = temp; UM%o\BiO
} FjfN3#qlg
} 9W7#u}Z