[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; (> {CwtH][
} MkCq$MA
int i1=l; erW[q
int i2=mid+1; mTsl"A>
for(int cur=l;cur<=r;cur++){ {@7{!I|eD
if(i1==mid+1) s,*kWy"jp
data[cur]=temp[i2++]; 6L)]nE0^
else if(i2>r) Q-qM"8I
data[cur]=temp[i1++]; BnL[C:|
else if(temp[i1] data[cur]=temp[i1++]; k-`5TmW
else hj_%'kk-A
data[cur]=temp[i2++]; 13X\PO'9
} x2M'!VK>n1
} d;-/F b{4
7 z#Xf
} ofu {g
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改进后的归并排序: `]0E)
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package org.rut.util.algorithm.support; (i"@{[IP
WN+D}z]
import org.rut.util.algorithm.SortUtil; Jn/"(mM
sr*3uI-)L
/** rphfW:
* @author treeroot zxV,v*L)
* @since 2006-2-2 -q}c;0vL-a
* @version 1.0 9PM\D@A{
*/ :*`5|'G}
public class ImprovedMergeSort implements SortUtil.Sort { T,sArKBI
A{3?G-]*
private static final int THRESHOLD = 10; juAUeGT
_W3>Km-A=/
/* -ST[!W V
* (non-Javadoc) ;Az9p h
* j1yW{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &QoV(%:]
*/ ~G;lEp
public void sort(int[] data) { \U0p?wdr:
int[] temp=new int[data.length]; >\x
mergeSort(data,temp,0,data.length-1); <Kq4thR
} VEuT!^0Z
9MmAoLm
private void mergeSort(int[] data, int[] temp, int l, int r) { *&m{)cTs
int i, j, k; w[A$bqz
int mid = (l + r) / 2; `h:$3a:5
if (l == r) J'%
return; <DM /"^*
if ((mid - l) >= THRESHOLD) OjUZ-_J
mergeSort(data, temp, l, mid); ')8c
else ir-= @@
insertSort(data, l, mid - l + 1); Rqk;!N
if ((r - mid) > THRESHOLD) CXZO
mergeSort(data, temp, mid + 1, r); JS&=V67[
else #})OnM^],
insertSort(data, mid + 1, r - mid); $Eo)i
9qHbV 9,M
for (i = l; i <= mid; i++) { [KT'aGK$
temp = data; D(m2^\O[
} CflGj0oy8
for (j = 1; j <= r - mid; j++) { 7<ZP(I5X
temp[r - j + 1] = data[j + mid]; RkrZncBgV<
} z&3in
int a = temp[l]; Q}A*{9#|
int b = temp[r]; \UD:9g"
for (i = l, j = r, k = l; k <= r; k++) { Yb~[XS |p
if (a < b) { /hojm6MM
data[k] = temp[i++]; >sUavvJ~x
a = temp; +~E;x1&'
} else { p\7(`0?8VN
data[k] = temp[j--]; *G<K@k
b = temp[j]; S:*.,zC
} AWY#t&
} 1236W+
} [+q':T1W-
^RS?y8
/** jlf.~vt
* @param data xUiSAKrcM
* @param l '`/Qr~]
* @param i Vm_waa
*/ U^ecg{
private void insertSort(int[] data, int start, int len) { ,:Q+>h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /4]<ro67E6
} nkv+O$LXP
} dK5|tWJX
} L=ala1{O
} kb27$4mm
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堆排序： :r{;'[38
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package org.rut.util.algorithm.support; ^9{mjy0Q
^F>C|FJ2
import org.rut.util.algorithm.SortUtil; yc#0c[ZQu
lji&]^1
/** X0h`g)Bbf
* @author treeroot th$?#4SbR
* @since 2006-2-2 (iwZs:k-
* @version 1.0 baD`k?](
*/ l(o#N'!j4
public class HeapSort implements SortUtil.Sort{ PD-<D~7
_I"T(2Au
/* (non-Javadoc) n#{z"G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qx B0I/ {
*/ |wnXBKV(
public void sort(int[] data) { )} I>"n
MaxHeap h=new MaxHeap(); $IM}d"/9
h.init(data); P6n9yJ$,cb
for(int i=0;i h.remove(); pyW&`(]S
System.arraycopy(h.queue,1,data,0,data.length); BrWo/1b
} XM9}ax
oi@hZniP?
private static class MaxHeap{ |>/T*zk<
*Zj2*e{Z9U
void init(int[] data){ :sf(=Y.qA
this.queue=new int[data.length+1]; p~n62(
for(int i=0;i queue[++size]=data; W?`%it5
fixUp(size); w^_[(9 `
} b5-WK;
} -^Pn4y]A)
k>2tC<
private int size=0; =JqKdLH
tX<. Ud
private int[] queue; 2MV!@rx
jkzC^aG
public int get() { l7+[Zn/v *
return queue[1]; nB;yS<
} j4!g&F _y
&!kD81?Mm
public void remove() { u%o2BLx
SortUtil.swap(queue,1,size--); 4RLuv?,)~
fixDown(1); TJ&Z/k3-
} }m`+E+T4
file://fixdown $CgJ+ua\8
private void fixDown(int k) { /nbHin#we
int j; ^an3&
while ((j = k << 1) <= size) { Gkc.HFn(
if (j < size %26amp;%26amp; queue[j] j++; *dTI4k
if (queue[k]>queue[j]) file://不用交换 o7qZy |\4S
break; ai3wSUYJi
SortUtil.swap(queue,j,k); i9QL}d
k = j; 5Tl3k=o}
} P?.j wI
} lY.{v]i }
private void fixUp(int k) { (jV_L1D
while (k > 1) { "JH /ODm
int j = k >> 1; o 0-3[W'x<
if (queue[j]>queue[k]) Cwb}$=p'
break; )kBN]>&R
SortUtil.swap(queue,j,k); i^i^g5l!
k = j; \-Oq/g{j
} ^lt;K{
} A6D@#(D
f vAF0 a
} -0 e&>H%
gbC!>LV
} yY3Mv/R
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SortUtil： =GP~h*5es
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package org.rut.util.algorithm; ~h:/9q
2I8RO\zR
import org.rut.util.algorithm.support.BubbleSort; I3#h
import org.rut.util.algorithm.support.HeapSort; JUf{;nt
import org.rut.util.algorithm.support.ImprovedMergeSort; q=_&izmE'7
import org.rut.util.algorithm.support.ImprovedQuickSort; B.J_(V+
import org.rut.util.algorithm.support.InsertSort; ,h#U<CnP#
import org.rut.util.algorithm.support.MergeSort; zFR=inI
import org.rut.util.algorithm.support.QuickSort; ",qcqG(
import org.rut.util.algorithm.support.SelectionSort; b8>2Y'X
import org.rut.util.algorithm.support.ShellSort; JfrPK/Vn
zvDg1p
/** !9n!:"(r
* @author treeroot OYj4G?c
* @since 2006-2-2 |%i|P)]
* @version 1.0 #S*@RKSE|7
*/ A`H&"A
public class SortUtil { ]tu:V,q
public final static int INSERT = 1; o#X=1us
public final static int BUBBLE = 2; {m<NPtp910
public final static int SELECTION = 3; EYsf<8cl
public final static int SHELL = 4; jn+M L&
public final static int QUICK = 5; kW 7$
public final static int IMPROVED_QUICK = 6; ';CL;A;
public final static int MERGE = 7; M_ GN3
public final static int IMPROVED_MERGE = 8; A3!xYG=+
public final static int HEAP = 9; :epjJ1mW
9rCvnP=
public static void sort(int[] data) { jP{W|9@(
sort(data, IMPROVED_QUICK); @S-p[u
} cP]5Qz
private static String[] name={ SU {U+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" B(omD3jzN
}; ;'|Mt)\
uia[>&2
private static Sort[] impl=new Sort[]{ 3hPj;-u
new InsertSort(), x'uxSeH$
new BubbleSort(), M.[A%_|P
new SelectionSort(), r N.<S[
new ShellSort(), PXH"%vVF
new QuickSort(), MV~-']2u
new ImprovedQuickSort(), :'t+*{ff
new MergeSort(), W{{{c2.
new ImprovedMergeSort(), VkD8h+)
new HeapSort() C4`u3S
}; ,^>WCG
q3~RK[OCq
public static String toString(int algorithm){ {e3XmVAI
return name[algorithm-1]; ]t23qA@^2
} 2&k5X-Y
~I_v {
public static void sort(int[] data, int algorithm) { _i-(`5
impl[algorithm-1].sort(data); IIrXI8'}
} Z6`oGFq
n*HRGJ
public static interface Sort { .QaHE`e{
public void sort(int[] data); gk*Md+
} DH5]Kzb/
jDaWmy<ha
public static void swap(int[] data, int i, int j) { m V U(b,
int temp = data; W8/8V,
data = data[j]; S]P80|!|
data[j] = temp; 0D\b;ju<
} v)TFpV6b{p
} EZz`pE