[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; [AzQP!gi
} v\Zni4
int i1=l; M)Iu'
int i2=mid+1; aRBTuLa)fo
for(int cur=l;cur<=r;cur++){ }`g:)gJ
if(i1==mid+1) ?{s!.U[T@
data[cur]=temp[i2++]; xOCHP|?
else if(i2>r) OhmKjY/}
data[cur]=temp[i1++]; % AqUVt9}
else if(temp[i1] data[cur]=temp[i1++]; "mbcZ5_
else x{Y}1+Y4
data[cur]=temp[i2++]; shbPy
} Nz`4q%+
} S<"M5e
*I;,|Jjk
} 6Z~u2&
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改进后的归并排序: ^,L vQW4
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package org.rut.util.algorithm.support; 82%~WQnS
v,Lv4)
import org.rut.util.algorithm.SortUtil; P-9[,3Zd
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/** "(y",!U@
* @author treeroot -TKS`,#
* @since 2006-2-2 70p1&Y7or
* @version 1.0 8X=cGYC#
*/ <vx/pH)f
public class ImprovedMergeSort implements SortUtil.Sort { rrK&XP&
f,9jK9/$
private static final int THRESHOLD = 10; (~F{c0\C
O5HK2Xg,C
/* V5y8VT=I
* (non-Javadoc) hC ^|
* p<1z!`!P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _@CY_`a
*/ ;Ee!vqD2
public void sort(int[] data) { u.( WW(/N
int[] temp=new int[data.length]; QFOmnbJg
mergeSort(data,temp,0,data.length-1); 5mB%Xh;bg
} ]>fAV(ix
tx}}Kd
private void mergeSort(int[] data, int[] temp, int l, int r) { J(*qOGBD
int i, j, k; aY8"Sw|4
int mid = (l + r) / 2; >jEn>H?
if (l == r) Xz)UH<
return; 'Eds0"3
if ((mid - l) >= THRESHOLD) ugexkdgM
mergeSort(data, temp, l, mid); Xg:w;#r,
else &jCT-dj
insertSort(data, l, mid - l + 1); * z|i{=W F
if ((r - mid) > THRESHOLD) Wx#((T
mergeSort(data, temp, mid + 1, r); < aeBhg%
else ~[|&)}q
insertSort(data, mid + 1, r - mid); Zw+VcZz3
jR-`ee}y2
for (i = l; i <= mid; i++) { sBP.P7u
temp = data; K8NoY6
} u"IYAyzL
for (j = 1; j <= r - mid; j++) { j.Ro(0%
temp[r - j + 1] = data[j + mid]; %VG;vW\V
} d (Ufj|;
int a = temp[l]; 85; BS'
int b = temp[r]; ' uvTOgP,
for (i = l, j = r, k = l; k <= r; k++) { Rd6? ,
if (a < b) { `ER">@&
data[k] = temp[i++]; O+I\Q?
a = temp; +jzwi3B`
} else { O]{3aMs!Y
data[k] = temp[j--]; VU+`yQp
b = temp[j]; IXb]\ )
} } ).rD
} mG4myQ?$
} XMb]&VvH
:uhU<H<,f
/** 1e`/N+6u
* @param data x`8rR;N!
* @param l H..g2;D
* @param i P3|_RHIb
*/ 4\'1j|nS[
private void insertSort(int[] data, int start, int len) { UhuEE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b%`^KEvwfo
} UM$\{$
} pvL)BD
} eliT<sw8
} A/n-.ci
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堆排序： 0$)CWah
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package org.rut.util.algorithm.support; 0TA{E-A
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import org.rut.util.algorithm.SortUtil; pME17 af
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/** r[xj,eIb
* @author treeroot \_?A8F
* @since 2006-2-2 VwfeaDJw
* @version 1.0 [fF0Qa-
*/ r':wq
public class HeapSort implements SortUtil.Sort{ gycjIy@t
W}&[p=PAS
/* (non-Javadoc) r0ml|PX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FEqs4<}E
*/ *a_U2}N
public void sort(int[] data) { z%xWP&3%"
MaxHeap h=new MaxHeap(); IS *-MLi
h.init(data); ^(<Ecdz(
for(int i=0;i h.remove(); e~#;ux
System.arraycopy(h.queue,1,data,0,data.length); &R$6dG4
} Ewjzm,2
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private static class MaxHeap{ H&K(,4u^
i}cqV B?r
void init(int[] data){ 9>gxJ7pY
this.queue=new int[data.length+1]; r{y&}gA
for(int i=0;i queue[++size]=data; qYD$_a
fixUp(size); lJaR,,
} Rf*we+
} RTN?[`
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private int size=0; 0vN<0
zrt\]h+
private int[] queue; o+UCu`7e
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public int get() { Ore>j+
return queue[1]; +ZH-'l
} 4to)ff
32yGIRV
public void remove() { &)UZ9r`z
SortUtil.swap(queue,1,size--); oNW.-gNT
fixDown(1); uSnG=tB
} 0p6
file://fixdown V_b"^911r
private void fixDown(int k) { 5`su^
int j; ,;3#}OGg
while ((j = k << 1) <= size) { }yQ&[Mt
if (j < size %26amp;%26amp; queue[j] j++; q18IqY*Lo
if (queue[k]>queue[j]) file://不用交换 )xJCH9h
break; SU,S1C_q8
SortUtil.swap(queue,j,k); gc~nT/lfK
k = j; Z) nB
} sVdn>$KXk
} 0,~f"Dyqy
private void fixUp(int k) { 5^kLNNum
while (k > 1) { $~x#Q?-y
int j = k >> 1; &72 ( <
if (queue[j]>queue[k]) |'mwr!
break; UC3&:aQ!
SortUtil.swap(queue,j,k); ,4kly_$BH
k = j; Q-A:0F&{t
} pib i#
} L{;Sc_
GYvD*?uBc
} R _#x
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} MW^(
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SortUtil： EPEy60Rx5
Fjnp0:p9X
package org.rut.util.algorithm; Q]44A+M]
2xPkQOj3
import org.rut.util.algorithm.support.BubbleSort; %:yp>nm
import org.rut.util.algorithm.support.HeapSort; Eb 8vnB#
import org.rut.util.algorithm.support.ImprovedMergeSort; s &4k
import org.rut.util.algorithm.support.ImprovedQuickSort; ?= G+L0t
import org.rut.util.algorithm.support.InsertSort; WBb@\|V|
import org.rut.util.algorithm.support.MergeSort; L7kNQ/
import org.rut.util.algorithm.support.QuickSort; qp#Is{=m
import org.rut.util.algorithm.support.SelectionSort; h%4aL38
import org.rut.util.algorithm.support.ShellSort; \!O3]k,r
UA>3,|gV1
/** i}&&rr
* @author treeroot P{T\zT
* @since 2006-2-2 Zv[D{
* @version 1.0 &xhwx>C`K
*/ E6 g]EE
public class SortUtil { *}F>c3x]
public final static int INSERT = 1; v,T:V#f^
public final static int BUBBLE = 2; HgGwV;W
public final static int SELECTION = 3; =g.R?H8cj5
public final static int SHELL = 4; fL xGaOT
public final static int QUICK = 5; _#\e5bE=Z
public final static int IMPROVED_QUICK = 6; I |PEC-(
public final static int MERGE = 7; + 6noQYe
public final static int IMPROVED_MERGE = 8; RB\ Hl
public final static int HEAP = 9; [zC1LTXe
Fb2,2Px
public static void sort(int[] data) { 9f(0 qa
sort(data, IMPROVED_QUICK); _h6j, )
} !+UU[uM
private static String[] name={ K20,aWBq;3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R"wBDWs
}; UC e{V]T
]!c59%f=
private static Sort[] impl=new Sort[]{ `p!&>,lrk
new InsertSort(), ZZs@P#]
new BubbleSort(), xNrPj8V<Y
new SelectionSort(), gg0rkg
new ShellSort(), ^4 MJ
new QuickSort(), @:dn\{Zsea
new ImprovedQuickSort(), PFKl6_(
new MergeSort(), ^ABtg#
new ImprovedMergeSort(), |D% O`[k+
new HeapSort() P,Z K
}; r*q
R7o'V* d
public static String toString(int algorithm){ t!8(IR
return name[algorithm-1]; B_uhNLd
} uGmv`R_
1^ijKn@6
public static void sort(int[] data, int algorithm) { ;tJ}*!z W
impl[algorithm-1].sort(data); D_N0j{E
} 8aqH;|fG}
} =p e;l
public static interface Sort { G$^u2wz.
public void sort(int[] data); \y(ZeNs
} Ia[4P8Z
;b5^)S
public static void swap(int[] data, int i, int j) { zv-9z
int temp = data; *|9:
data = data[j]; |2Y/l~
data[j] = temp; zH13~\
} * lJkk
} aBd>.]l?