[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; V^_A{\GK
} {-Y;!
int i1=l; :iE b^F}
int i2=mid+1; @](vFb
for(int cur=l;cur<=r;cur++){ !T0I; j&
if(i1==mid+1) 6K.2VY#
data[cur]=temp[i2++]; As,`($=
else if(i2>r) JS/'0.
data[cur]=temp[i1++]; fL*7u\m:
else if(temp[i1] data[cur]=temp[i1++]; N5?bflY
else '`jGr+K,wU
data[cur]=temp[i2++]; :v^/k]S
} -XBZ1q
} !5ps,+o
Os9SfL
} /QXUD.( 8
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改进后的归并排序: z CLaHx!
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package org.rut.util.algorithm.support; $_.t'8F
Q#g`D,:o%~
import org.rut.util.algorithm.SortUtil; 8V:;HY#
<C`bf$ak
/** sfXFh
* @author treeroot ZM<6yj"f
* @since 2006-2-2 P $`1}
* @version 1.0 ]1 f^ SxSI
*/ f+Y4~k
public class ImprovedMergeSort implements SortUtil.Sort { 8C3k: D[
2-4N)q
private static final int THRESHOLD = 10; rq%]CsRY5
zhn?;Fi
/* |*bUcS<S
* (non-Javadoc) tq L(H25z
* GHv6UIe&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x=*&#;Y|
*/ !ku}vTe
public void sort(int[] data) { Tz,-~mc
int[] temp=new int[data.length]; `O\>vn
mergeSort(data,temp,0,data.length-1); ;<+efYmyc
} Fd9[Pe@?`
A]BeI
private void mergeSort(int[] data, int[] temp, int l, int r) { 'va[)~!
int i, j, k; <pX?x3-'
int mid = (l + r) / 2; rL5=8l
if (l == r) ^Om}9rXw1
return; T@W:@,34
if ((mid - l) >= THRESHOLD) yT^2;/Z
mergeSort(data, temp, l, mid); )qxt<
else LK'(OZ
insertSort(data, l, mid - l + 1); H{}&|;0
if ((r - mid) > THRESHOLD) E*'YxI
mergeSort(data, temp, mid + 1, r); Zmu
else B}"R@;N
insertSort(data, mid + 1, r - mid); i%i~qTN
opa/+V3E4
for (i = l; i <= mid; i++) { yy3rh(ea
temp = data; I!/32* s1t
} YmljHQP
for (j = 1; j <= r - mid; j++) { O nXo0PV/(
temp[r - j + 1] = data[j + mid]; o#m31*o
} )LP'4*
int a = temp[l]; D6ZHvY8R
int b = temp[r]; MdBmq/[O
for (i = l, j = r, k = l; k <= r; k++) { VzG|Xtco[
if (a < b) { //8W">u
data[k] = temp[i++]; 7 A0?tG
a = temp; jF6_yw
} else { Jn hdZa
data[k] = temp[j--]; {~apY,3
b = temp[j]; Fs]N9],=I
} ?b_E\8'q]
} xw*e`9vAe
} <F3{-f'Rx
OX"Na2-el
/** /d&m#%9Up]
* @param data x1:mT[[$
* @param l P-X|qVNK1Z
* @param i I9kz)Q o
*/ #S7oW@
private void insertSort(int[] data, int start, int len) { >LPb>t5%p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5o6IpF0V
} hb3n- rO
} k+_>`Gre}
} O*N:A[eW
} jIKg* @
n@pwOHQn<|
堆排序： ed'[_T}T3t
c]pz&
package org.rut.util.algorithm.support; 4X=VNORlU0
5*z>ez2YQ7
import org.rut.util.algorithm.SortUtil; Luao?;|U
:hICe+2ca
/** {\>4)TA
* @author treeroot -VohU-6 |
* @since 2006-2-2 YdD; Qx#O
* @version 1.0 $:u*)&"t|
*/ KR.;X3S}
public class HeapSort implements SortUtil.Sort{ a 4?A 5
kF1$
/* (non-Javadoc) SS/vw%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I[E 6N2
*/ b`e_}^,c
public void sort(int[] data) { Ug*B[q/
MaxHeap h=new MaxHeap(); 9d1km~
h.init(data); c =m#MMc)
for(int i=0;i h.remove(); NVzo)C8kb
System.arraycopy(h.queue,1,data,0,data.length); :'DX M{
} IJf%OA>v
&r[f ;|o
private static class MaxHeap{ \]>821r
/Am9w$_T[
void init(int[] data){ rl.K{Uad
this.queue=new int[data.length+1]; %Z6Q/+#fn
for(int i=0;i queue[++size]=data; 7nPg2K&
fixUp(size); 59nRk}^$se
} ]*NYuEgc
} i&DbZ=n2
72$S'O%,0
private int size=0; 1V,@uY)s
.]>Tj^1
private int[] queue; 7#JnQ| ]
#JYl%=#,
public int get() { @>2]zMFf
return queue[1]; {^oohW -
} "e-z2G@z
knO X5UnS
public void remove() { gb,ZN^3<-
SortUtil.swap(queue,1,size--); ltOS()[X
fixDown(1); mX|M]^_,z
} P 0\`4Cr!
file://fixdown !$n@:W/
private void fixDown(int k) { bofI0f}5.
int j; TqJ @l
while ((j = k << 1) <= size) { <HnJD/g
if (j < size %26amp;%26amp; queue[j] j++; }wo:1v8J
if (queue[k]>queue[j]) file://不用交换 ,?LE5]
break; +~=a$xA[C
SortUtil.swap(queue,j,k); jA"}\^%3
k = j; qz- tXc,
} NioqJG?p
} h`U-{VIrqi
private void fixUp(int k) { 7bYwh8
while (k > 1) { R\cx-h*
int j = k >> 1; nHRsr x
if (queue[j]>queue[k]) {5VJprTbv
break; +1#oVl!
SortUtil.swap(queue,j,k); [ as,AX
k = j; lAnOO5@8
} ~;?mD/0k
} FW[|Zq;}
~j{c9EDT|
} zsQ]U!*rD
L%H\|>k`
} MO0t
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SortUtil： & *tL)qKDc
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package org.rut.util.algorithm; DD/B\
`Fcr`[
import org.rut.util.algorithm.support.BubbleSort; ~AWn 1vFc
import org.rut.util.algorithm.support.HeapSort; 1Z0Qkd(
import org.rut.util.algorithm.support.ImprovedMergeSort; << =cZ.HP
import org.rut.util.algorithm.support.ImprovedQuickSort; hXFT(J=
import org.rut.util.algorithm.support.InsertSort; xjBY6Ylz
import org.rut.util.algorithm.support.MergeSort; KsGW@Ho:
import org.rut.util.algorithm.support.QuickSort; In4VS:dD
import org.rut.util.algorithm.support.SelectionSort; %KF I~Qk
import org.rut.util.algorithm.support.ShellSort; }alq~jY
2r2:
/** %V;*E]
* @author treeroot 'WHI.*=
* @since 2006-2-2 p+Q9?9
* @version 1.0 nt"\FZ*;3
*/ Fr50hrtkU
public class SortUtil { mfj%-)l9
public final static int INSERT = 1; `i|!wD,=\
public final static int BUBBLE = 2; ")9^
public final static int SELECTION = 3; <:AA R2=
public final static int SHELL = 4; w nBvJb]4l
public final static int QUICK = 5; #[i3cn
public final static int IMPROVED_QUICK = 6; nKd'5f1
public final static int MERGE = 7; .Ao _cx
public final static int IMPROVED_MERGE = 8; ?6"U('y>n
public final static int HEAP = 9; '-(Z.e~e
E4=D$hfq`
public static void sort(int[] data) { ("(wap~<nD
sort(data, IMPROVED_QUICK); '=G6$O2
} L_T+KaQCH
private static String[] name={ |;:Kn*0/]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :CqR1_n%
}; E<D^j^T
N[-$*F,:_
private static Sort[] impl=new Sort[]{ uo?R;fX26
new InsertSort(), KCpq<A%
new BubbleSort(), A;X3z-[[
new SelectionSort(), I]+OYWp
new ShellSort(), J>+\a1{
new QuickSort(), CqWO 0
new ImprovedQuickSort(), Hxy=J
new MergeSort(), tSni[,4Kq
new ImprovedMergeSort(), [c;0eFSi2
new HeapSort() 63'%+
}; cjtcEW
1Z?uT[kR
public static String toString(int algorithm){ oNYFbZw
return name[algorithm-1]; Vo[.^0
} XFWE^*e=B
^[R/W VNk
public static void sort(int[] data, int algorithm) { Rt,po
impl[algorithm-1].sort(data); 'b"7Lzp2
} w('}QB`xad
Za?BpV~
public static interface Sort { >bI\pJ
public void sort(int[] data); pm9sI4S
} A.yIl`'UP#
t(vyi
public static void swap(int[] data, int i, int j) { \'zloBU
int temp = data; Jj0:p"
data = data[j]; \d.\M
data[j] = temp; 'ahz@+lO
} vz3olHX
} A:4&XRYZY