[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; 'UhHcMh:
} Fn.JtIu
int i1=l; ;+XrCy!.)L
int i2=mid+1; J@:Q(
for(int cur=l;cur<=r;cur++){ B?i#m^S
if(i1==mid+1) 'y;Kj
data[cur]=temp[i2++]; 9[zxq`qT}+
else if(i2>r) A0Nx?
data[cur]=temp[i1++]; *gH]R*Q[Rt
else if(temp[i1] data[cur]=temp[i1++]; b]b>i]n
else y@l&B+2ks
data[cur]=temp[i2++]; :pdX
} V5(_7b#z``
} aGC3&c[Wx
rs?Dn6:;B
} =gI41Y]
OJpfiZ@Q_
改进后的归并排序: [TOo9W
l+@;f(8}
package org.rut.util.algorithm.support; iOg4(SPci
]uox ^HC
import org.rut.util.algorithm.SortUtil; pZ'q_Oux
\"(?k>]E
/** ,i6E L
* @author treeroot pi"M*$
* @since 2006-2-2 AMjr[!44 @
* @version 1.0 uX1;
*/ ={;pg(
public class ImprovedMergeSort implements SortUtil.Sort { 't`h?VvL
y/\b0&
private static final int THRESHOLD = 10; }qM^J;uy
53{\H&q
/* |&8XmexLb
* (non-Javadoc) K1hkOj;S
* +o`%7r(R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {WV"]O8IV
*/ N_bgWQY
public void sort(int[] data) { Xd%qebK
int[] temp=new int[data.length]; ~Pw9[ycn3
mergeSort(data,temp,0,data.length-1); :W0p36"
} 12U]=
sMGo1pG(
private void mergeSort(int[] data, int[] temp, int l, int r) { _aevaWtEx
int i, j, k; ^}Vc||S
int mid = (l + r) / 2; neM.M)0
if (l == r) c`;oV-f
return; ]0*aE
if ((mid - l) >= THRESHOLD) iSO xQ
mergeSort(data, temp, l, mid); aI&~aezmN
else `hO%(9V9
insertSort(data, l, mid - l + 1); 56z>/`=
if ((r - mid) > THRESHOLD) ?@4Mt2Z\
mergeSort(data, temp, mid + 1, r); AB/${RGf+
else */h(4Hz
insertSort(data, mid + 1, r - mid); 3XlQ4
fE~KWLm
for (i = l; i <= mid; i++) { se %#U40*
temp = data; + )Qu,%2
} _">F]ptI;
for (j = 1; j <= r - mid; j++) { GKIzU^f
temp[r - j + 1] = data[j + mid]; ,5 ka{Q`K
} ((A@VcX
int a = temp[l]; 0a89<yX
int b = temp[r]; "O>~osj
for (i = l, j = r, k = l; k <= r; k++) { g)czJ=T2
if (a < b) { \JM6zR^Ef
data[k] = temp[i++]; dP_QkO
a = temp; >hNSEWMY`
} else { CWkWW/ZI
data[k] = temp[j--]; "}Om0rB}1
b = temp[j]; tcj"rV{G
} =h4uN,
} IW!x!~e
} "<0!S~]
+h"i6`g
/** 5%\K
* @param data K>+ v" x
* @param l uuEvH<1
* @param i *d C|X
*/ 5 NYS@76o7
private void insertSort(int[] data, int start, int len) { 5Jo'h]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m+'1c}n^7
} -lJ|x>PG'
} &mN]U<N
} ;>Z+b#C[
} \;Q(o$5<
O~qRHYv
堆排序： LmJjO:W}^y
)q_,V"
package org.rut.util.algorithm.support; CbM~\6R
NxnRQS
import org.rut.util.algorithm.SortUtil; |.Vgk8oTl
dYISjk@
/** it H
* @author treeroot /E<Q_/'Z
* @since 2006-2-2 9e`};DE
* @version 1.0 ,]0BmlD
*/ <fHHrmZ#/.
public class HeapSort implements SortUtil.Sort{ T%%EWa<a
Jf2JGTcm
/* (non-Javadoc) D,.`mX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #WG}"[ ,c
*/ >oq\`E
public void sort(int[] data) { h<?Px"& J
MaxHeap h=new MaxHeap(); k:?)0Uh%^
h.init(data); QaO9-:]eN
for(int i=0;i h.remove(); t+A*Ws*o
System.arraycopy(h.queue,1,data,0,data.length); ^ulgZ2BQ|
} /95z1e
(enr{1
private static class MaxHeap{ ).jQ+XE'>
Z#u{th
void init(int[] data){ q'S[TFMNE
this.queue=new int[data.length+1]; +Iuu8t
for(int i=0;i queue[++size]=data; }OIe!
fixUp(size); ?cWwt~N9
} tF,`v{-up
} [O\)R[J
iuWUr?`\
private int size=0; cRKLyb
8OOAPp$%|
private int[] queue; s2,6aW C
D6lzcf
public int get() { !)oQ9,N
return queue[1]; ^"<Bk<b(
} U0-RG
. h)VR 5?j
public void remove() { mQVlE__ub
SortUtil.swap(queue,1,size--); ,1 H|{<
fixDown(1); 1ik.|T<f0
} &I ~'2mpk
file://fixdown {=?[:5
private void fixDown(int k) { 38&K"
int j; N}/V2K]Q
while ((j = k << 1) <= size) { lPz`?Hn
if (j < size %26amp;%26amp; queue[j] j++; ]lKUpsQI
if (queue[k]>queue[j]) file://不用交换 d1.@v;
break; lmcgOTT):
SortUtil.swap(queue,j,k); mN{H^
k = j; zfDfy!\2_
} el$@^Wy&$
} ZL0Vx6Ph
private void fixUp(int k) { 38-kl,Vw
while (k > 1) { @>VX]Qe^X
int j = k >> 1; 5I[:.o0
if (queue[j]>queue[k]) }#.OJub
break; MjQ>&fUK
SortUtil.swap(queue,j,k); 6miXaAA8
k = j; xr.;B`T0\'
} :KC]1_zqR
} x Y$x=)
5hEA/G
} ,^ ,R .T
m~=VUhPd
} B7qi|Fw
SD~4CtlfI
SortUtil： =@O&$&
%Qj$@.*:
package org.rut.util.algorithm; 8[@Y`j8
~a V5
import org.rut.util.algorithm.support.BubbleSort; zE8_3UC
import org.rut.util.algorithm.support.HeapSort; 3s]o~I2x
import org.rut.util.algorithm.support.ImprovedMergeSort; ]srL>29_b
import org.rut.util.algorithm.support.ImprovedQuickSort; 3`D*AFQc
import org.rut.util.algorithm.support.InsertSort; `;G@qp:A
import org.rut.util.algorithm.support.MergeSort; Jon3ywd1Y
import org.rut.util.algorithm.support.QuickSort; EpACd8Fb
import org.rut.util.algorithm.support.SelectionSort; $[HCetaqV
import org.rut.util.algorithm.support.ShellSort; w$s6NBF7
gZ>&cju
/** n=DmdQ}
* @author treeroot #(}{*dR
* @since 2006-2-2 {7X9P<<L7
* @version 1.0 KJ&I4CU]^
*/ mK7SEH;
public class SortUtil { WUYU\J&q3
public final static int INSERT = 1; rUV'DC?eE
public final static int BUBBLE = 2; Qg1kF^=
public final static int SELECTION = 3; Iw] ylp
public final static int SHELL = 4; D)4#AI
public final static int QUICK = 5; n|.eL8lX.<
public final static int IMPROVED_QUICK = 6; :Id8N~g
public final static int MERGE = 7; [KGj70|~
public final static int IMPROVED_MERGE = 8; \{*`-Pv
public final static int HEAP = 9; g|^U?|;p
TRgj`FG
public static void sort(int[] data) { '%|Um3);0p
sort(data, IMPROVED_QUICK); ulg=,+%r
} yN[i6oe
private static String[] name={ Sh5m+>7K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VtN@B*
}; :`BG/
7/]Ra
private static Sort[] impl=new Sort[]{ }`0=\cKqn
new InsertSort(), 6L~5qbQ
new BubbleSort(), S{XO3
new SelectionSort(), Iza#v0
new ShellSort(), ,Cm1~ExJ
new QuickSort(), NU.4_cixb
new ImprovedQuickSort(), ,{ 0&NX
new MergeSort(), o@$pyU8
new ImprovedMergeSort(), I+Qt5Ox
new HeapSort() aY,'^S
}; @GweNo`p7
hE\gXb
public static String toString(int algorithm){ 'g<FL`iP
return name[algorithm-1]; AKLFUk
} Y!c7P,cZ+3
`} 'o2oZnG
public static void sort(int[] data, int algorithm) { %dd B$(
impl[algorithm-1].sort(data); "_rpErm }
} ^Kl<<pUaV
yJ; ;&
public static interface Sort { #K-O<:s=y
public void sort(int[] data); m=iKu(2xRq
} W+V &
-:!T@rV,d
public static void swap(int[] data, int i, int j) { gi_f8RP=2a
int temp = data; H%>cpwa[7
data = data[j]; ?6\A$?
data[j] = temp; @v6{U?
} ~2Mcw`<
} ?ODBW/{[G